it seems nontoxic rifle bullets fit the description of armor piercing.
Some can, but they are not much good for hunting. We generally use copper bullets. Work OK, but not as well as lead. Stuff is expensive, so practice is concentrated just before a hunt, rather than year around. Can use other lead ammo for practice, but why bother if trajectory is different than the hunting load. Big PITA, and I have not seen a box of .308 Barnes in two years, so have to hunt with a .270 because I have "legal" ammo for that gun.
