Tanner just a little advise. Retumbo is not 243 powder even with the heavies.
I have a 6mm-284 that has quite a bit more case cap. than a 243 and it is still way too slow of a burn rate.
RL22 is about as slow of a burn rate that is realistic, my favorite in the 243 with 95-105gr bullets is IMR4831.
Right now on this forum many are gacking allover themselves that RL17 will do anything...it is a much better choice than Retumbo.
VVN160,RL19,H4831, hell even JB's TAC that he claim's you will never need to clean for the life of the barrel is a better choice than Retumbo......you've been gettin bad advice
