*The BESA machine guns on British tanks used the original 8x57.
And they worried about non compatible ammo?
Replace all those aircraft 303s with 50 cal and more better! Lot easier than 20mm. Odd stuff. Throwing a 30-30 class cartridge at them Germans no wonder they jumped to 20mm (better off with the BESSA!)
Seems any time it came up they managed, M1, Brits, Sherman tanks and their 75 mm (early, but Brits only had one Firely per 4 I believe)
US could have used that 17 lb er and been better off.
So it goes and off topic I know