I use Hornady TAP 168 AMAX in my 20" POF (piston AR10 type). Use Black Hills 168 AMAX also. Used the BH out of a Remington 700 LTR to drop a buck at 660 yards. DRT. Also shot a goose sized target at 730 yards.
Great accuracy/terminal effect.
-dan
Yeah as has been noted, treaties supersede our constitution/laws. So for instance a treaty banning civilian ownership of semi autos across the globe would apply to use if the idiots in charge sign it.
-dan