Nosler has introduced a .224 60 gr Balistic tip but doesn't state what BC is? I want to load up 500 of the best Long range predator/varmint for my RRAs coyote AR-15. So far it is producing well under 3/4MOA with Blue Box Black Hills ammo shooting 52 gr match bullet. Uncertain if I should stick with 55gr or 60 gr. BBL is a 1 in 9" 20" BBL.