I've been getting great results with a 168 gn Berger, 66.1gn 4831SC, and CCI 250's. my 300 WSM
isn't a super custom gun by any means and it throws those very well. I know it's not as fast but it's consistent. Still looking for a faster round. And from what I gather the 4831 sc is a really stable powder that shoots consistent in extreme temps and high altitudes so its a winner for me. Post what you find though cause I'm always ready for an experiment.