dude
READ
like really
your reading comprehension sucks,
he wants a SOLID COPPER handgun bullet
you pull some paragraph from who knows where??
that says AP is "brass, bronze, beryllium, copper, "
so, um, yeah I'm right, and please read, it gets pretty technical, the ATF has in the past considered 'exotic' bullets greater then 25% weight non lead to be AP, go look up the Olympic arms fiasco, they are the reason that cheap milsup 7.62x39 is no longer imported.
As for the Barnes
you can apply to the ATF and get an exception/determination that the bullet is 'Sporting' and NOT designed to pierce armor.