It amazes me that a 10mm Luger bullet (middle) has about 50% MORE energy than the significantly larger .45 colt long (right).

For reference on tbe left is a 9mm parabellum.

@freemo 45 Colt loads are designed to replicate its original black powder performance, a hot modern load would basically be a 454 Casull
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@scathach I can tell you from shooting them it builds up a much thicker and harder to clean residue, thats for sure

@scathach 45 colt is ok to shoot, but i find their mostly in revolvers and i dont find many revolvers to be very ergonomic. So they tend to hurt your hand ifyou shoot it too much, not to mention being a pain to clean.

A 10mm has 50% more energy but, at least in my gun, is much smoother to shoot. I'd say for handguns 10mm and 9mm will cover you well enough... if you really want a variety a 45 ACP is nice, as is the 5.7mm

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