Oh, uh duh...Howa 22-250 1:14 twist. I'd REALLY like to find a 1:10 twist to stabalize a heavier bullet. 55's are max for this gun. 22" Barrel.
Found something interesting this summer - Benchmark is suposed to be really temp. stabile. I found the opposite - my gun was all over the place - I took it to the range, and found that with each successive shot, FPS was dropping 50-60fps per shot on a 4 shot string. Almost a 200 FPS variance. I had tested this round in the winter, and it shot fine, got a slightly sub MOA shot group. In the summer, it was all over the place. I trickle charge my rounds, so consistancy was not the issue - it was heat. I pulled 5 rounds and randomly checked them just to be sure. They were all 33 Gr. exactly. So powder was the issue with the heat. That was a max load too. I was glad to have finally found a round that was not at max and was shooting the 55gr. very accurately. I did not shoot these off a lead slead - just some lead bags used like sand bags, so the round is probably capable of better - It's the shooter that is not.
