FiveInADime
New member
I recently switched from Fed. match LR primers to CCI BR-2 and it looks as if i may need to do some retesting to find my 7MM-08 accuracy load again. The original load was 45.2gr of RL17, RP brass, 150GR. Sierra MKs. It was producing ~1/2-3/4" groups with the Feds. and through 20 rounds today the best I could get was 1.75"-2.5"! I knew there might be a difference, but I wasn't anticipating that big of a change. Anyone else experienced swings in accuracy like this when switching primers?