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Well... what would be a .357 load that has as good of terminal performance as a .45 ACP? I know they operate on two different principles (fast, small bullet vs large, slow one) but there has to be some point where they're "stopping power" (hate that term) is about equal.
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Convert your data into overall energy.
For examply my Hornady .45 Auto ammo claims 1000fps with a 185gr bullet (from a 5" barrel I guess?). That gives 410 ft/lbs.
http://www.handloads.com/calc/quick.asp
That's about the lower range of a .357 with the same sized barrel.