Best bullet diameter I've got other than a round for the GAU-8 is the one on the right. .56 caliber, 900 grains. It's the plinking bullet for the big gun in next picture. The real bullet is 1,300 grains and I guarantee four things about it. You won't whine about the fact the gun weighs 47#, as I recall. You will likely need a rest unless you're Paul Bunyan. It will put critters down on the spot. The working charge is 250 grains of Lord Black.

The little puny thing behind the penny is a 530 grain .45-70 bullet. It only works on buffalo.

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I am..........disturbed.

Concerning the difference between man and the jackass: some observers hold that there isn't any. But this wrongs the jackass. -Twain