Mine is a rem 700 short action with a new take off sporter Rem 700 barrel like yours set back and reamed to seat bullets at 2.80" initially. I have been fireforming and tried a few newly formed brass with 105's and RE 15 with great results. No moly yet for me. Redding 3 die set and this is my second .243 AI. Still working up loads but just under 3000 fps now. Anybody using Retumbo powder for this one? Target is around 3100 fps depending on best accuracy. Check out the 6mm BR website if you have not already done so.
