Technically, a cottonball is a cop killer if you can throw it hard enough...
Absolutely AND every hunting rifle caliber. What you can count on is the regulations proposed by Holder, et al. are both ignorant and dishonest. Holder does not give a fig for Mexican stability. He wants to take guns from law abiding citizens and make the population easier to push around.
...or stuffed in nose & mouth wrapped with duct tape.