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.

#gun #guns #2a

@freemo the difference is from technological advances in metallurgy and the change from black powder to modern smokeless powders

Modern ammunition designs just don't need anywhere near the same amount of case capacity to generate the same amount (or more) energy.

The .38 vs 9mm is a good example as they have roughly the same diameter bullet but the 9mm has almost ~30% more energy despite being ~30% shorter overall.

@drewfer @freemo I'm interested to know what the metallurgy is about here. Do you have a link to something?

@SteelFolk @drewfer

He is probably talking about copper jackets. Back in the cowboy days they were just lead slugs.

@freemo @drewfer Oh, the brass bit? I read that barrels on big ship guns suffered from fatigue to due to hoop stress and didn't last long so I though it might be about something similar.