.45 Remington–Thompson

Experimental firearms cartridge March 2025 .45 Remington–Thompson .45 Remington-Thompson cartridge.jpg .45 Long cartridge for the Thompson M1923 experimental SMG Experimental military round 1923 .45 ACP .447 Frank C. Barnes Cartridges of the World: A Complete and Illustrated Reference for Over 1500 Cartridges https://books.google.com/books?id=02CYCAAAQBAJ&pg=PA519 2014 F+W Media, Inc. 978-1-4402-4265-6 519 1 in mm on (about 1/8 in mm on longer than the .45 ACP) Johnston, Gary Paul, & Nelson, Thomas B. The World's Assault Rifles (Lorton, VA: Ironside International Publishers, Inc, 2010), no p#. (at Google Books) 250 gr 1,450 ft/s on 1,165 lbft on 14 in (356 mm) thumb|Headstamp for the .45 Remington-Thompson cartridge. The .45 Remington–Thompson (11.4x25mm) was an experimental firearms cartridge designed by Remington Arms and Auto Ordnance for the Model 1923 Thompson submachine gun, a variant of the Model 1921 with a longer barrel, with the intent of increasing the power and range of the weapon.Daniel D. Musgrave Thomas B. Nelson The World's Assault Rifles and Automatic Carbines https://books.google.com/books?id=q5pBAAAAIAAJ 1967 T. B. N. EnterprisesNed Schwing Standard Catalog of Military Firearms: The Collector's Price and Reference Guide https://books.google.com/books?id=9xrmt_KlkvcC&pg=PA369 2005 Krause Publications 0-87349-902-6 369 While some variants of the 1923 were produced, the rifle and round did not find commercial success. See also 12 mm caliber List of handgun cartridges References Category:Pistol and rifle cartridges Category:Military cartridges Category:Abandoned military projects of the United States Category:Remington Arms cartridges