I always chuckle when I hear people asking about the "military green tip, armor piercing" rounds. they watch too many movies. Even LEOs are not all that well educated on firearms, ballistics, and capabilities. My sister is a records clerk for the local sheriffs department, and was commenting on how everyone was nervous/worried because during a recent break in, an AR-15 was stolen, and the weapon was loaded with "Military green tip, armor piercing ammo"
I had to inform her how even lead core, copper jacket rounds will punch clean through steel plate. I have some 3/8" steel plate that I was plinking at. my 9mm, .40, and .45 would hit it and just fragment, not even leave a mark on the plate. my AR would burn through it like it was paper. Even the hollowpoint .223 that I had, would burn through the steel plate.
It's somewhat disturbing how many cops think that their soft kevlar vests will stop anything.