.458 Lott

Cartridge August 2020 December 2011 .458 Lott 458Lott375HHMag458WinMag.png 300px .458 Lott (left), its parent case the .375 H&H Magnum (center) and the .458 Winchester Magnum (right) for comparison. United States Rifle Jack Lott 1971 A-Square 1989–present .458 Lott Improved, .450 Watts Magnum, .450 Ackley Magnum .375 H&H Magnum Belted, straight .458 .481 .513 .532 .050 2.800 3.600 110 1-14 in Large Rifle (Magnum) 62500 300 Barnes X 2700 4855 350 Barnes X 2600 5252 400 Barnes X 2550 5774 450 Barnes Solid 2450 5996 500 Barnes Solid 2300 5872 The .458 Lott is a .458 caliber rifle cartridge designed for the purpose of hunting large, thick-skinned dangerous game animals in Africa. It is based on the full length .375 H&H Magnum case blown out and shortened to 2.800 in. Barnes Frank C. Skinner, Stan Cartridges of the World 11th 1965 2006 Gun Digest Books 552 0-89689-297-2 The .458 Lott was designed in response to perceived inadequacies and problems encountered with the .458 Winchester Magnum. The cartridge provides a distinct step up in performance over the .458 Winchester Magnum.November 2022 A-Square, Česká Zbrojovka/Brno, Hornady, and Ruger have been instrumental in the cartridge's rise in popularity. Cartridge history The .458 Winchester Magnum was designed in 1956 and was an immediate commercial success. It was a more economical alternative to the English double rifles that were considered the standard rifle type for dangerous game hunting in Africa. The .458 Winchester Magnum was designed to emulate the performance of the .450 Nitro Express in a standard-length bolt-action rifle. However, it soon became apparent that the .458 Winchester Magnum was not performing as anticipated. Several factors contributing to its less than stellar performance in Africa: clumping of its compressed powder chargehttp://www.458express.com/history.htm 458 Express History Koos Badenhorst 458express.com 11 September 2010 https://web.archive.org/web/20110707064246/http://www.458express.com/history.htm 7 July 2011 dead and use in 20 – 22 in on barrel rifles.Pappas Cal The .458 Watts/ .458 Lott http://www.cybertorpedo.com/africanhunter/classcart/458_watts_lott_01.htm African Hunter Front Sight 10 September 2010 https://web.archive.org/web/20101121075951/http://cybertorpedo.com/africanhunter/classcart/458_watts_lott_01.htm 21 November 2010 dead Jack Lott, a big-game hunter and writer from the US, had an adverse encounter with a Cape buffalo in Mozambique in 1959 in which he sustained injuries.Wieland Terry Dangerous-Game Rifles 2006 Countrysport Press 978-0-89272-691-2 148 He had been hunting with the then new .458 Winchester Magnum.458 Lott http://www.norma.cc/content.asp?Typ=68&Lang=2&DocumentID=348&Submeny=2&Rubrik=African%20PH&Title=458%20Lott norma.cc Norma 10 September 2010 https://web.archive.org/web/20100918021052/http://www.norma.cc/content.asp?Typ=68&Lang=2&DocumentID=348&Submeny=2&Rubrik=African%20PH&Title=458%20Lott 18 September 2010 live This experience convinced him that a cartridge more powerful than the .458 Winchester Magnum was required when hunting dangerous game in Africa. After the encounter he began a search for a big-bore cartridge which would suit his needs perfectly.Steele Kevin E. J Buff Busters http://www.rifleshootermag.com/featured_rifles/buff_1124/index.html rifleshootermag.com Petersen.s Publications 10 September 2010 dead https://web.archive.org/web/20100206101230/http://www.rifleshootermag.com/featured_rifles/buff_1124/index.html 6 February 2010 Not finding a cartridge that would fit his needs, he designed a cartridge which he felt would meet his requirements in a dangerous-game cartridge. Jack Lott's original drawings of the cartridge were done on a napkin at a diner. The first cases for the new rifle cartridge were fireformed from .375 H&H Magnum brass into a chamber by using .458 caliber (11.6 mm) bullets which had their bases re-sized .375 in mm on so as to fit in the mouth of the .375 H&H Magnum. This method of fireforming left the newly formed cases slightly shorter than the parent cases. The resulting cartridge is named the .458 Lott in his honor. A similar method was used by David Miller and Curt Crum to create cases for their early custom .458 Lott rifles. The creation of the cases began with the casting of a .458 in mm on bullet with a .375 in mm on shank and which weighed around 260 gr. This bullet was seated on a .375 H&H Magnum case containing 30.0 gr g on of Hercules 2400 powder with some polyester material used as a wadding to hold the powder charge against the primer. This set-up was then fire-formed in rifle with a .458 Lott chamber. The fire-formed cases were then run through a .458 Winchester Magnum full length re-sizing die with a set off of .125 in mm on. Once this was accomplished cases were trimmed to 2.790 in mm on tumbled clean. Unfortunately for Miller and Crum, this method of fire-forming of brass led to severe gas cutting into the neck area of the .458 Lott fire-forming rifle after only 200 rounds.Sitton G. .458 Lott Rifle - the Sporting Firearms Journal 135 20–23 http://www.riflemagazine.com/magazine/PDF/ri135partial.pdf 7 June 2011 May–June 1991 dead https://web.archive.org/web/20111004155513/http://www.riflemagazine.com/magazine/PDF/ri135partial.pdf 4 October 2011 In 1989 A-Square became the first company to offer the .458 Lott as a commercial cartridge. At present, the 465 gr on Triad (Monolithic Solid, Dead Tough and the Lion Load) for the .458 Lott cartridge is available from the company.http://a-squareco.com/.458_Lott_465_gr_Triad.html .458 Lott 465 gr. Triad a-squareco.com A-Square 13 September 2010 https://web.archive.org/web/20100818231853/http://a-squareco.com/.458_Lott_465_gr_Triad.html 18 August 2010 dead A-Square also championed the successful SAAMI standardization of the .458 Lott cartridge which took place in 1995. They currently offer the A-Square Hannibal and Caesar rifles chambered for this cartridge. Design and specifications The objective behind the design of the .458 Lott was to provide a greater case capacity over the .458 Winchester Magnum so as to provide better performance and less compression of the powder charge.McAdams John 2020-01-29 458 Win Mag vs 458 Lott: What You Know May Be Wrong https://thebiggamehuntingblog.com/458-win-mag-vs-458-lott/ 2024-02-01 Big Game Hunting Blog en-US The .458 Lott achieved both these objectives by its lengthened cartridge. Furthermore, as the Lott cartridge is in essence a lengthened .458 Winchester Magnum, converting a .458 Winchester Magnum to .458 Lott involves in many cases a simple re-boring of the chamber and if required, a lengthening of the magazine. The .458 Lott was standardized by SAAMI in 1995 based on specification provided by Arthur Alphin and A-Square LLC. According to Arthur Alphin, the cartridge length was standardized at 2.800 in mm on and the chamber length at 2.810 in mm on because there were many converted rifles in the field that were chambered for the original Jack Lott length. The specifications published by SAAMI reflect this fact. The specifications for the .458 Lott call for a cartridge which gradually tapers. However, A-Square and few other ammunition manufacturers provide a ghost shoulder for the cartridge which was not included in the specification as standardized by SAAMI. Arthur Alphin chose not to include the ghost shoulder to remain true to Jack Lott's wishes and to honor his memory. The ghost shoulder serves to provide better retention of the bullet in the case under recoil. Like A-Square .458 Lott cartridges, Barnes .458 Lott brass bears a ghost shoulder for this very same reason. 598px|alt=.458 Lott Schematic|.458 Lott - All dimensions in inches (mm) SAAMI compliant .458 Lott cartridge schematic: All dimensions in inches [millimeters]. SAAMI recommends a 6 groove rifling contour with each groove being .150 in on wide. Distance between lands is .450 in on and between grooves is .458 in on. Recommended rifling twist rate for this cartridge is 1-14 in. Since Lott was an influential big-game hunter and writer, the cartridge gained some attention with professional hunters in Africa. The .458 Lott was soon commercialized by A-Square as a proprietary cartridge. CZ chambered the cartridge in their BRNO ZKK 602 rifles based on the Magnum Mauser action. However, the Lott remained fairly obscure at least in the United States until Ruger offered the cartridge in their Ruger M77RSM Mk II rifles to the American public in 2002.Bodinson Holt J Ruger's buffalo rifle: it ain't no Sharps, but it shoots like one http://findarticles.com/p/articles/mi_m0BQY/is_7_51/ai_n13785373/ https://web.archive.org/web/20051223063408/http://www.findarticles.com/p/articles/mi_m0BQY/is_7_51/ai_n13785373 usurped 2005-12-23 Gun Magazine Firearms Marketing Group 7 51 July 2005 10 September 2010 Since then there has been a slow but steady movement away from the .458 Winchester Magnum towards the .458 Lott among professional hunters heading to Africa. The .458 Winchester Magnum is ubiquitous in Africa. While one might not be able to easily find ammunition for the big Weatherby or the Nitro Express cartridges, due to its popularity one would be able to find .458 Winchester Magnum cartridges. In an emergency, the .458 Winchester Magnum can be fired in the chamber of a .458 Lott. Performance By 1970 Winchester was forced to deal with the clumping of the compressed powder charge which had been resulting in improper ignition and poor performance. Winchester's remedy was to lessen the compression of the powder column. The result was a .458 Winchester Magnum that was now attaining only about 1950 ft/s m/s on. This was 200 ft/s on below what Winchester's original design specifications intended. The .458 Winchester Magnum was originally supposed to duplicate the performance of the .450 Nitro Express which could fire a 500 gr on bullet at 2150 ft/s m/s on. On the other hand, the .458 Lott is designed to provide about 200 - 300 ft/s m/s on more velocity than the .458 Winchester Magnum. The performance goal does not just match but exceeds the original performance specifications of the .458 Winchester Magnum. The cartridge is capable of firing a 500 gr on bullet at 2300 ft/s m/s on from a 23 in mm on barrel such as the Ruger M77. This capability easily exceeded the performance that was expected of the .450 Nitro Express and the .458 Winchester Magnum. The Lott cartridge was a distinct step up from the .458 Winchester Magnum and the .450 Nitro Express cartridges. The .458 Lott is also considered a better cartridge for dangerous game hunting than the .470 Nitro Express when judged by its effects on big game. Due to its development and purpose, the performance of the .458 Lott is often compared with that of the .458 Winchester Magnum. This is inevitable as the latter was the cartridge which the .458 Lott was designed to replace. Cartridge Criteria Muzzle 50 yd m on 100 yd m on 150 yd m on 200 yd m on 250 yd m on 300 yd m on .458 Winchester Magnum Hornady 500 gr on DGSHornady .458 Winchester Magnum 500 gr. DGS Super Performance http://www.hornady.com/store/458-Win-500-gr-DGS-Superformance/ Hornady 22 August 2010 https://web.archive.org/web/20100912165756/http://www.hornady.com/store/458-Win-500-gr-DGS-Superformance/ 12 September 2010 dead Velocity 2140 ft/s m/s on 2007 ft/s m/s on 1879 ft/s m/s on 1757 ft/s m/s on 1641 ft/s m/s on 1531 ft/s m/s on 1429 ft/s m/s on Energy 5084 ftlbf J on 4472 ftlbf J on 3921 ftlbf J on 3428 ftlbf J on 2990 ftlbf J on 2603 ftlbf J on 2267 ftlbf J on .458 Lott Hornady 500 gr on DGSHornady .458 Lott 500 gr. DGS http://www.hornady.com/store/458-Lott-500-gr-DGS/ Hornady 22 August 2010 https://web.archive.org/web/20100719202529/http://www.hornady.com/store/458-Lott-500-gr-DGS/ 19 July 2010 dead Velocity 2300 ft/s m/s on 2162 ft/s m/s on 2029 ft/s m/s on 1900 ft/s m/s on 1777 ft/s m/s on 1660 ft/s m/s on 1549 ft/s m/s on Energy 5873 ftlbf J on 5190 ftlbf J on 4568 ftlbf J on 4007 ftlbf J on 3505 ftlbf J on 3058 ftlbf J on 2663 ftlbf J on Values courtesy of the Hornady Ballistic Calculatorhttp://www.hornady.com/ballistics-resource/ballistics-calculator A Hornady Ballistics Calculatorl hornady.com Hornady Manufacturing Company 11 September 2010 https://web.archive.org/web/20100914032408/http://www.hornady.com/ballistics-resource/ballistics-calculator 14 September 2010 live For the purposes of this comparison barrel a barrel length of 24 in mm on is used. 400px|right|alt=458 Lott bullet velocity 400px|right|alt=458 Lott bullet energy levels The .458 Lott is able to attain over 2300 ft/s m/s on with a 500 gr on jacketed bullet at safe pressure levels from a 23 - 24 in mm on barrel. In comparison, many ammunition manufacturers load the .458 Winchester Magnum to velocities between 2050 - 1950 ft/s m/s on.http://www.federalpremium.com/products/rifle.aspx Rifle Ammunition federalpremium.com Federal Premium Ammunition 2 October 2010 Hornady's Superformance ammunition being an exception which uses powder blends which at present remain proprietary.http://www.americanhunter.org/ArticlePage.aspx?id=2086&cid=54 Hornady Superformance Ammunition NRA Staff americanhunter.org NRA Publications 2 October 2010 https://web.archive.org/web/20110722045454/http://www.americanhunter.org/ArticlePage.aspx?id=2086&cid=54 22 July 2011 dead The .458 Lott is capable of reaching a velocity of 2150 ft/s m/s on with the 600 gr on bullet which is greater than the velocity reached by Hornady's 500 gr on Superformance .458 Winchester Magnum ammunition. With lighter bullets of 300 gr on, it is able to achieve a velocity of about 2850 ft/s m/s on. These energy and velocity values provide the .458 Lott cartridge a gain of between 50 - 100 yd m on over the .458 Winchester Magnum in distance. This performance increase provides better penetration and stopping power than the .458 Winchester Magnum against dangerous game. However, the mono-metal bullets fall short of this velocity threshold due to the need to seat the bullets deeper owing to the length of the bullets and the need to stay within the maximum overall length specification of the cartridge. This is because the lower mono-metal bullets have a higher length to weight ratio than conventional bullets. Manufacturers such as A-Square have chosen to load slightly lighter bullets 465 gr on instead of the 500 gr on bullets.Haley Charlie Solids vs Mono-metal Bullets - Which is Best? http://www.shakariconnection.com/solids-v-monometal.html African Hunter Magazine 20 August 2010 https://web.archive.org/web/20100901185655/http://www.shakariconnection.com/solids-v-monometal.html 1 September 2010 live The straight tapered case of the .458 Lott provides greater flexibility in reloading to lower velocities than bottlenecked cartridges. The ability to reload ammunition to lower velocities with lighter bullets can provide shooters with ammunition with less recoil than the full power .458 Lott ammunition. Nyati Inc., a big bore ammunition manufacturer, has taken advantage of this flexibility and offers ammunition featuring a 500 gr on copper jacket bullet at 1100 ft/s m/s on. They also offer intermediate power ammunition for the .458 Lott as well.http://nyatiinc.com/index.php?route=product/product&path=35&product_id=65 458 Lott Practice Ammunition nyatiinc.com Nyati Inc. 23 September 2010 Handloaders can take advantage of the wide range of bullet of useful weights are available in .45 caliber for the .458 Lott cartridge. Bullets ranging from 300 - 600 gr on can be loaded for the Lott cartridge. This, together with the ability to load the cartridge to lower power levels, easily adds to the versatility of the .458 Lott. .458 Lott velocities range from 3000 ft/s m/s on with the 300 gr on bullet and 2150 ft/s m/s on with the 600 gr on bullet. Spitzer bullets with better ballistics such as the Barnes X or TSX bullet provides better down range performance over the more conventional .45 caliber (11.6 mm) bullets. The .458 Lott does well with hardcast lead bullets. With these bullets the Lott can be loaded to the power level of the original .45-70 Government cartridge. which was a 405 gr on bullet at 1330 ft/s m/s on. What the .458 Lott lacks in velocity and energy compared to the .450 Rigby or the .460 Weatherby Magnum, it more than makes up for by virtue of its versatility. Larger volume cases such as the .460 Weatherby Magnum do not do well with powder charges below the recommended minimums. This is due to the erratic ignition and hangfire issues experienced when large capacity cartridges are loaded with small powder charges. The Lott has no such issues and takes well to lower powder charges. Sporting usage The .458 Lott was designed to be an African dangerous game rifle cartridge particularly for use against heavy, thick-skinned dangerous game such as elephant, Cape buffalo and rhinoceros. It is considered an ideal cartridge for hunting African dangerous game and is capable of taking game from elephant to the duiker. Acceptable bullet weights for the .458 Lott range from 300 to 600 gr on.Dave Scovill Barnes Reloading Manual Number 3 http://www.barnesbullets.com/products/other-merchandise/reloading-manual-3/ 3rd 2001 2001 Barnes Bullets, Inc. America Fork, UT 796 16 October 2010 https://web.archive.org/web/20101130154838/http://www.barnesbullets.com/products/other-merchandise/reloading-manual-3/ 30 November 2010 dead The range of available bullets provides the flexibility to customize loads for specific game species. Elephant require a bullet of a tough construction which will not deform easily. The bullet must be able to penetrate heavy bone and exit from all possible angles. These requirement reduce the useful choices to solid bullets.http://www.grosswildjagd.de/elephant.htm Hunting Elephant Today grosswildjagd.de Gross WildJagd 13 September 2010 This is especially true if the classic brain shot is contemplated when hunting elephant where the bullet must penetrate through the honeycombed bone structure of the frontal area of the elephant's skull.http://elephant.elehost.com/About_Elephants/Anatomy/The_Skeleton/the_skeleton.html MacKenzie Paul The Skeleton elehost.com EleHost 16 October 2010 1 July 2010 https://web.archive.org/web/20100701185839/http://elephant.elehost.com/About_Elephants/Anatomy/The_Skeleton/the_skeleton.html dead Bullets which are chosen must have sectional densities of over .300 while a sectional densities of .330 are preferred so as to provide the necessary penetration on these, the largest of the terrestrial mammals. Premium solid bullets from A-square, Barnes, Hornady, North Fork or Woodleigh weighing in the range of 450 - 550 gr on are all capable of holding together without much deformation and penetrating to the brain. With lesser FMJ bullets only heart, lung or shoulder shots should be considered. Cape buffalo and rhinoceros, though heavily boned and tough are mostly hunted with soft point bullets although FMJ and solid bullets are chosen by some hunters. Again as with elephants, premium bullets of a sturdy construction should be chosen. The bullet chosen must be able to break through bone and penetrate to the vitals. Soft points similar to the A-Square Dead Tough, Barnes TSX,http://www.barnesbullets.com/products/rifle/tsx-bullet/ TSX Bullet barnesbullets.com Barnes Bullets 13 September 2010 https://web.archive.org/web/20101130132023/http://www.barnesbullets.com/products/rifle/tsx-bullet/ 30 November 2010 dead Hornady DGXhttp://www.hornady.com/store/DGX/ DGX hornady.com Hornady Manufacturing Company 13 September 2010 https://web.archive.org/web/20100817140135/http://www.hornady.com/store/DGX/ 17 August 2010 dead and the Woodleigh Weldcore Soft Nosehttp://www.woodleighbullets.com.au/products/weldcore-soft-nose Weldcore Soft Nose woodleighbullets.com.au woodleigh bullets 13 September 2010 https://web.archive.org/web/20100927084900/http://www.woodleighbullets.com.au/products/weldcore-soft-nose 27 September 2010 live are examples of these bullets. The .458 Lott has ample power to spare on these species. While the .458 Lott is capable of taking lion and leopard, it is considered overly powerful for the big cats.Rifles for Hunting Dangerous Game http://findarticles.com/p/articles/mi_m0BQY/is_7_51/ai_n13785373/ https://web.archive.org/web/20051223063408/http://www.findarticles.com/p/articles/mi_m0BQY/is_7_51/ai_n13785373 usurped 23 December 2005 firearmssite.com Firearms Site 7 51 12 September 2010 Lighter, soft point bullets which rapidly expand or fragment at higher velocities are usually recommended for the big cats. A-Square Lion Load bullet or soft points manufactured for the .45-70 Government fills this niche for the .458 Lott. The manufacture of spitzer style bullets in the .45 caliber has generally been a recent trend. These bullets provide better ballistic coefficients than the more common round nose or flat nosed bullets available in this caliber. The better ballistic coefficients translate to better longer range performance. Loaded with lighter bullets with better ballistic coefficients at higher velocities the .458 Lott can be used as a medium-range plains game rifle cartridge.http://www.africanxmag.com/new_thunder_in_the_bushveld.htm New Thunder in the Bushveld Hans J. Wild africanxmag.com African Expedition Magazine 13 December 2010 https://web.archive.org/web/20101119114250/http://africanxmag.com/new_thunder_in_the_bushveld.htm 19 November 2010 live In North America, apart from big bears and bison,Hawks Chuck Rifles for Dangerous Game http://www.chuckhawks.com/rifles_dangerous_game.htm chuckhawks.com Chuck Hawks 12 September 2010 https://web.archive.org/web/20100910232604/http://www.chuckhawks.com/rifles_dangerous_game.htm 10 September 2010 live big game does not require cartridges similar to the .458 Lott. Those who reload ammunition are able to take advantage of the .458 Lott's performance flexibility to tailor their ammunition to the species of game they wish to hunt. Rifles and ammunition Since there are several rifle actions manufactured that are capable of handling the full length magnum cartridges such as the .375 H&H Magnum, it is not surprising that the .458 Lott has been chambered in several rifles. The .458 Lott cartridge's maximum overall length is only .3 in mm on longer than the standard length magnum cartridges like the 7mm Remington Magnum and the .300 Winchester Magnum. For this reason several rifles, which were formerly chambered for cartridges like the .375 H&H Magnum and the .458 Winchester Magnum, were easily converted to the .458 Lott early on when .458 Lott rifles were only available as a custom offering. These conversions required no more than a re-boring or a re-barreling and perhaps a magazine extension if required. The Mauser style action has long been favored by African hunters. It is considered a highly reliable action for its ability to function dependably under adverse and stressful conditions. Many rifle makers like CZ, Hartmann & Weiss, Heym, Holland & Holland, Mauser, Kimber, and Westley Richards are turning out rifles made on the Magnum Mauser 98 action in this cartridge. CZ's Brno ZKK602 was one of the first rifles manufactured which was chambered for the .458 Lott. CZ currently produces the CZ 550 American Magnum rifle in that chambering.http://cz-usa.com/products/view/cz-550-american-safari-magnum/ CZ 550 American Safari Magnum CZ-USA Česká zbrojovka a.s. 13 December 2010 https://web.archive.org/web/20110124165431/http://cz-usa.com/products/view/cz-550-american-safari-magnum/ 24 January 2011 live The Heym Express and Kimber Caprivi are also manufactured for the .458 Lott cartridge. Mauser makes .458 Lott rifles in several models in their M 98 and M 03 rifle lines.http://www.mauser.com/Rifles.61.0.html?&L=1 Mauser Rifles mauser.com Mauser Jagdwaffen GmbH 13 December 2010 https://web.archive.org/web/20070427182558/http://www.mauser.com/Rifles.61.0.html?&L=1 27 April 2007 dead Non-Mauser action rifles for the .458 Lott are produced by A-Square, Blaser and Weatherby. A-Square's Hannibal and Caesar rifles are built on Enfield P14 actions. Blaser manufactures the Blaser R8 Safari PH and Safari Luxus rifle models in the .458 Lott chambering.http://www.blaser-usa.com/R8-Bolt-action-Rifles.1039.0.html R8 Blaser blaser-usa.com Blaser Jagdwaffen GmbH 13 December 2010 https://web.archive.org/web/20101214073410/http://blaser-usa.com/R8-Bolt-action-Rifles.1039.0.html 14 December 2010 live Weatherby offers the .458 Lott cartridge in the Mark V Deluxe and also through their custom shop. Ruger chambers the .458 Lott in the Ruger No. 1 Tropical Rifle. Several other manufacturers also offer rifles chambered in the cartridge as a regular or custom offering. An advantage that the .458 Lott offers over more voluminous cartridges such as the .450 Rigby, .460 Weatherby or the .505 Gibbs is that it can be easily adopted in currently mass-produced and thus commonly encountered rifle actions with little or no modification of the bolt face. For this reason, it is a much more economical alternative to cartridges which need larger action types and larger bolt faces. The cartridge's popularity is due in large part to the wide availability of affordable rifles which are or can easily be chambered for the cartridge. Due to the popularity of the .458 Lott as a hunting cartridge there are several sources of ammunition. A-Square, Double Tap, Federal, Hornady, Kynoch, and Norma are among several manufacturers of .458 Lott ammunition. Most ammunition manufactured for the cartridge is loaded with a 500 gr on bullet at 2300 ft/s on which has become the industry standard for the cartridge. {| class="wikitable" border="1" |+ .458 Lott Ammunition |- | style="background: #eeeeee" width="180pt" | Ammunition | style="background: #eeeeee" width="165pt" | Bullet | style="background: #eeeeee" width="140pt" | Muzzle Velocity | style="background: #eeeeee" width="140pt" | Muzzle Energy | style="background: #eeeeee" width="190pt" | MPBR/Zero |- | style="background: #eeeeee" | Double Taphttp://elephant.elehost.com/About_Elephants/Anatomy/The_Skeleton/the_skeleton.html MacKenzie Paul The Skeleton elehost.com EleHost 16 October 2010 1 July 2010 https://web.archive.org/web/20100701185839/http://elephant.elehost.com/About_Elephants/Anatomy/The_Skeleton/the_skeleton.html dead http://www.doubletapammo.com/php/catalog/index.php?cPath=21_67 .458 Lott doubletapammo.com Double Tap Ammunition 18 October 2010 https://web.archive.org/web/20110723171531/http://www.doubletapammo.com/php/catalog/index.php?cPath=21_67 23 July 2011 dead || 350 gr on TSX || 2875 ft/s on || 6426 ftlbf J on || 266 yd m on/227 yd m on |- | style="background: #eeeeee" | Double Tap || 500 gr on Weldcore JSP || 2350 ft/s on || 6133 ftlbf J on || 226 yd m on/193 yd m on |- | style="background: #eeeeee" | Double Tap || 550 gr on Weldcore JSP || 2195 ft/s on || 5913 ftlbf J on || 215 yd m on/283 yd m on |- | style="background: #eeeeee" | Federal P458LT1http://www.federalpremium.com/products/rifle.aspx Rifle Ammunition federalpremium.com Federal Premium 18 October 2010 || 500 gr on TBCC || 2300 ft/s on || 5873 ftlbf J on || 224 yd m on/191 yd m on |- | style="background: #eeeeee" | Federal P458LT2 || 500 gr on TBSS || 2300 ft/s on || 5873 ftlbf J on || 223 yd m on/190 yd m on |- | style="background: #eeeeee" | Federal P458LA || 500 gr on TSX || 2280 ft/s on || 5771 ftlbf J on || 227 yd m on/193 yd m on |- | style="background: #eeeeee" | Federal P458LG || 500 gr on BBS || 2300 ft/s on || 5873 ftlbf J on || 228 yd m on/194 yd m on |- | style="background: #eeeeee" | Hornady 8262http://www.hornady.com/store/458-Lott/ 458 Lott Products hornady.com Hornady Manufacturing 18 October 2010 https://web.archive.org/web/20101013140021/http://www.hornady.com/store/458-Lott/ 13 October 2010 dead || 500 gr on DGS || 2300 ft/s on || 5873 ftlbf J on || 220 yd m on/188 yd m on |- | style="background: #eeeeee" | Hornady 82613 || 500 gr on DGX || 2300 ft/s on || 5873 ftlbf J on || 220 yd m on/188 yd m on |- | style="background: #eeeeee" | Norma 11115http://www.norma.cc/content.asp?Typ=55&Lang=1&DocumentID=48&Submeny=2&Rubrik=African%20PH&Title=458%20Lott 458 Lott norma.cc Norma Precision AB 18 October 2010 || 500 gr on RN || 2100 ft/s on || 4897 ftlbf J on || 206 yd m on/176 yd m on |- | style="background: #eeeeee" | Norma 11116 || 500 gr on FMJ || 2100 ft/s on || 4897 ftlbf J on || 206 yd m on/176 yd m on |- |colspan="5" align="center" | Values courtesy of the respective manufacturer MPBR/Zero values courtesy of Big Game Info.http://www.biggameinfo.com/BalCalc.aspx Ballistics Calculatorl biggameinfo.com Big Game Info 15 October 2010 https://web.archive.org/web/20101026024639/http://biggameinfo.com/BalCalc.aspx 26 October 2010 dead |} Variants Prior to the arrival of the .458 Lott there were a few other .45 caliber (11.6 mm) cartridges with similar performance levels based on the full length .375 H&H Magnum case such as the .450 Ackley Magnum, .450 Barnes Supreme, .450 Mashburn Magnum and the .450 Watts Magnum.http://www.africanoutfitter.com/backissues/2007/junejuly/450ackleymagnum.php The .450 Ackley Magnum Vincent Roy June–July 2007 africanoutfitter.com African Outfitter Magazine 20 September 2010 https://web.archive.org/web/20110707092915/http://www.africanoutfitter.com/backissues/2007/junejuly/450ackleymagnum.php 7 July 2011 dead There are only minute variations between these cartridges. Most .458 Lott chambers will accept the .450 Watts cartridge as the chambers are reamed to accept a 2.850 in mm on cartridge. Chuck Hawks The .458 Lott and .450 Watts Magnum https://www.chuckhawks.com/450Watts.htm 16 April 2022Hansen Norbert The Cartridge .458 Lott or .450 Watts and .450 Ackley Magnum http://www.africahunting.com/content/2-cartridge-458-lott-450-watts-450-ackley-magnum-326/ africahunting.com Africa Hunting 8 December 2009 12 September 2010 https://web.archive.org/web/20100617232321/http://www.africahunting.com/content/2-cartridge-458-lott-450-watts-450-ackley-magnum-326/ 17 June 2010 live The .458 Lott chamber will not accept an improved cartridges like the .450 Ackley Magnum and the .450 Barnes Supreme. Depending on chamber dimensions it may accept the Watts version of the cartridge. However strict SAAMI compliant chambers will not accept the .450 Watts Magnum and any attempt to discharge it in such a chamber will invariably result in higher pressures and catastrophic failures may result. .450 Ackley Magnum The .450 Ackley Magnum was designed in 1960 by Parker Otto Ackley. The .450 Ackley Magnum can be considered an improved cartridge in comparison with the .458 Lott. The cartridge has minimum body taper ending with a small shoulder. Case capacity and performance is slightly greater than that of the .458 Lott resulting in less 50 ft/s m/s on in velocity at equal pressures. Chamber will accept the Lott and Watts cartridges. The .458 Winchester Magnum can be fired in the chamber in an emergency. The .450 Barnes supreme cannot be fired in the chamber of the .450 Ackley as there are minute dimensional differences which may prevent the cartridge from chambering. A-Square currently loads this cartridge with a 465 gr on bullet at 2400 ft/s m/s on.http://a-squareco.com/Ammunition.html A-Square Ammunition a-squareco.com A-Square 23 September 2010 https://web.archive.org/web/20100818141521/http://a-squareco.com/Ammunition.html 18 August 2010 dead .450 Watts Magnum The .450 Watts Magnum was designed by Watts and Anderson of Washington State. The .450 Watts Magnum is similar to the .458 Lott with the exception of case length which is 2.850 in mm on. While the case capacity is slightly more than that of the Lott cartridge, the maximum overall cartridge length is the same. As this is the case, once the bullet is seated case powder capacity is almost identical. A .450 Watts Magnum chamber will accept the .458 Lott cartridge without issue. The .458 Winchester Magnum can be fired in the chamber if required. The .450 Watts can be fired in the chambers of the .450 Ackley Magnum, .450 Barnes Supreme and the .450 Mashburn Magnum chambers. Firing the case in improved chambers similar to that of the Ackley or the Barnes cartridges will result in a slight reduction in performance. See also 11 mm caliber List of rifle cartridges Table of handgun and rifle cartridges References 458 Lott