I recently bought an AR-10 so I have been working up loads in .308 for it. So far I have found CFE-223 pushing a 155gr match king works pretty well. Varget seems to be a top choice by many and I have been working up loads with it. BLC-(2) seems to be a good one as well. I have some 748 that I was going to work with as well but just don't have the time to spend that I need to work on loads.