^^^ They've got a whole shelf of that stuff at Cabela's. Man up and drive to the West Side... <lmao>
OP, you have a Rock River Predator... but you didn't say what caliber. Now, obviously, this is a 308AR board, so everyone is ASSuming that you're talking about a .30-cal projectile here... In light of that, the above recommendations are sound. Very sound.
However, if you have a 5.56 gun, but just didn't specifiy that, then there's only ONE round for you.
Barnes 70gr TSX. You can only find it as loaded ammunition from Silver State Armory anymore. Barnes isn't even producing the projectile for civilian customers these days. THAT is a deer-slayer. <thumbsup>