I tried to use a 45 ACP round for deer hunting in Missouri. I heard that you couldn't use the FMJ so I got some rounds that were, IIRC 180 gr. They were a kind of cone shaped lead bullet. I don't reload and have no idea what the powder was or anything like that. Whatever it was it didn't work. I shot at a deer in an open field, about 75 yards off and the bullet made it little more than 2/3rds of the way out there.
I traded the gun for a Winchester .300 magnum. Problem solved.
Peace,
gordon

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better have that checked