Dunno the .45 ACP case capacity but I run 180 gr bullets out of my .30/.357 wildcat at 1050 or so without trying. Roughly the same capacity as the .300 BO. It takes 5-6 gr of powder in a case that could handle twice that.

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