Nosler brass and rem 7.5 small bench rest primers but loaded to saami 52000 pressure... hmmm Don't know about the pressure rating but NATO 62gr is loaded to 60000 and runs close to that with a 20" barrel.
I run 2963fps avg, with a 60gr V-max in a 16" AR-15. Got 3110fps with Nosler 60gr but it was a little warm in a 17" AR-15.
