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difference is bullet size. Note the '45' is a larger number then '44'. So, can't shoot the 44 in a 45 nor can you shoot the 44 in a 45, the 44 is too small. It's merely SIZE...............( the cartridge cases also make a difference in that they also differ in size) 45 diameter is .451 or .452 44 diameter is .429

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16y ago

What else can I help you with?