This weekend, I took it to the range to fire form some more brass (40 rounds fired at the same target), and also tested some 140 Hybs in once fired formed brass. I tested H4350 and the "magic" RL26 just to see if the claims of "an additional 100fps" were realistic.
.918" (.887 MOA) across 4.5 hours and fluctuating winds. .588" vertical, .918" horizontal.
H4350 topped out at a whopping 2915fps from my 20" 1:7.5" Benchmark! I was pleasantly surprised. I was hoping for 2850. But best accuracy was at 2880fps.
RL26 started out a lot slower than I thought (2750fps), and I was pretty disappointed. So I actually skipped the next charge weight, planning on shooting every other one to see of it improved. Charge weight #3 was 2850, just .8gr over #1. RL26 would end up topping out at 3011fps, but it started to open up. Just a hint of an ejector shine on one case, so it is max. From a 20" pushing a 140 Hyb. Best accuracy was at 2960 and 2982. The RL26 was not as accurate as the H4350 loads, but I think seating depths might bring them in some.
