created this new cartridge
for use with their new .50 1911
style Model No. 1
pistol. It is a fifty caliber
pistol round that has an over all length that is close to the .45 ACP
Typical loads fire a 300 gr bullet at about 725 feet per second out of a five inch barrel. It is a low pressure round but there is a higher pressure load that gives an extra 100 feet per second of muzzle velocity.
Unlike the .40 S&W, this cartridge would probably have low acceptance as it is another solution looking for a problem. Not to mention too expensive.