“Cops are actually allowed extra-powerful loads,”
Cite the law on that, please.
And what is an “extra-powerful” round?
What is an illegal “extra-powerful” round?
+P, in California.
You know the gunpowder pushes the bullet out, right? That can be made more powerful. It's a physics thing, don't let it worry your little head. And as for gun laws, you've heard of California, right? It's the State on the left coast. Look it up.