Anyone with a 7 Rem Mag Sendero, what's the eaviest bullet you've been able to stabilize? I've gotten good results with 162 ELDX's and Berger 168's but haven't tried anything heavier.
Remember, factory rifle barrels are not hand-lapped, so they will have a break-in period. Sometimes that can take up to 100 shots before they settle-in with consistent groups. Once you get consistent groups, then start working on load development. But first worry about breaking it in.