.500 A-Square

Rifle cartridge January 2013 Product February 2022 .500 A-Square United States Centerfire/Rifle Arthur Alphin 1976 A-Square Company LLC 1978–2011 .460 Weatherby Magnum Belted, bottleneck .510 .536 .568 .582 .579 .063 2.900 3.74 141.45 63860 1 in 10" Large rifle magnum 600 Monolithic Solid 2470 8127 600 Round Nose 2470 8127 26 in The .500 A-Square is a belted, bottleneck rifle cartridge, developed by Arthur Alphin in 1976. The cartridge is based on the .460 Weatherby Magnum necked up to accept the .510 in mm 2 on bullet; the same as the .50 BMG cartridge. This was Col. Alphin's first commercial sporting cartridge and was designed in "response to some severe problems experienced with the .458 Winchester Magnum on safari in Mozambique."Alphin Col. Arthur B. Any Shot You Want 1st 1996 1996 On Target Press 605 0-9643683-1-5 The .500 A-Square was a proprietary cartridge and the world's most powerful commercially available sporting cartridge.September 2026 However, the .50 BMG is the world's most powerful commercial cartridge for any shooting purpose. The .500 A-Square is used specifically for the hunting of elephants and Cape buffalo as well being used as a backup gun for professional hunters and guides while hunting thick skin dangerous game in Africa. Overview September 2026 The .500 A-Square cartridge was commercially available from both A-Square and Midway USA as loaded ammunition.September 2026 The ammunition was available in three loads: 600 gr g 1 Monolithic Solid 600 gr g 1 Soft-nose thick jacket 600 gr g 1 Soft-nose thin jacket All bullet/cartridge combinations were advertised with a muzzle velocity of 2470 ft/s and muzzle energy of 8127 ftlbf. In comparison: the parent cartridge, the .460 Weatherby Magnum is commercial loaded with a 500 gr g 1 Monolithic Solid has a muzzle velocity of 2580 ft/s and muzzle energy of 7389 ftlbf. The .50 BMG as commercial loaded with a 661 gr g 1 FMJ M33 ball ammo has a muzzle velocity of 2750 ft/s and muzzle energy of 11102 ftlbf. Although there is limited hand-loading information, bullet weights (hunting) are from between 300 gr g 1 to 647 gr g 1. A-Square Company In October 2011, A-Square ceased all ammunition operations. References Category:Pistol and rifle cartridges Category:Wildcat cartridges