I got a great accuracy result from my first real attempt with the Sierra 100gr GameKing, last weekedn but putting the load over the chrono this weekend has highlighted a problem with deer legality....so did some testing this morning....still a problem !!!
Sierra 100gr GameKing .243
Varget min 31.0 max 33.7gr
33.5gr FPS 2550 Ftlb 1445 (3 rounds overlapping / clover leaf at 100 yards)
34.0gr FPS 2675 Ftlb 1590
34.5gr FPS 2720 Ftlb 1643 (0.8gr over Hodgdon max)
I was only aiming to get around 2770 FPS for a legal charge in UK but appear to have a "slow" barrel.
I think another powder and some more testing is going to be required ....Any advice appreciated given the apparent "slow" barrel.
Cheers + ATVB