Re: primers for 7mm rem mag?
Quite honestly, you need to test them. Everyone has their own recipe and it really depends on what powder you are using and what your rifle likes. With mine, I started with Win LRM primers and moved to CCI 250's which gave me better accuracy. If you're shooting heavy bullets, a good rule of thumb is to stick with magnum rated primers and a slower burning powder. The combo I settled on is CCI 250's, RL-25 and 175 SMKs.