.45 ACP max muzzle energy?
While muzzle energy is one measure, do not discount momentum.
You might be surprised to find that the higher energy loads with all their flash and thunder are about as effective as the heavier projectile loads; and all may have similar momentum.
Using 3 buffalo Bore loads as examples:
185gr x 1,150 = 212,750 (543 ft. lbs.)
200gr. x 1,050 = 210,000 (490 ft. lbs.)
230gr x 950 = 218,500 (461 ft. lbs)
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