|Below written by Guncrafter Industries on the 50 GI cartridge & firearm.
Introduced in 2004 and developed from the ground up specifically for their Model No.1 pistol. It is a very
strong, thick-walled cartridge which, when loaded, is approximately the same over-all length as a 45 ACP round.
Due to the large caliber, the cartridge operates at relatively low pressures and has a long reloading life.
The concept was to create a practical .50 caliber 1911 without unnecessary bulk or weight, but with increased knock-down power. Factory loads for the 50 GI typically drives a 300 grain bullet at 700 -725 fps, which translates into a 210 power factor. This is achieved without loss of controllability.
Firing this load feels comparable to shooting a standard .230 hard ball factory round. However, the 50 GI is a
very versatile cartridge and can be loaded to higher or lower levels, as desired. Another factory load drives the same 300 grain bullet at 875 – 900 fps and puts some serious stopping power downrange, while still being quite controllable for the seasoned .45 ACP shooter.