Re: 225 and 250s arent grouping with H1000 or Retumbo
This effect has plagued me and my 6.5 STW. WC 872 and H50BMG will fling shots and break my hunting confidence. So I use fast (realitively) powders, Retumbo, RL25, and 7828 and get little triangle shaped groups. Hard on brass but trust worthy. Actually Retumbo seems to be in what appears to a gaping hole between the burn speeds of the 7828,h1000, RL25's and then the 872, 869, and h50bmg. Retumbo also gives good groups without wrecking brass seems to work well with my shortish 26" barrel. I believe barrel length is the reason one has trouble sometimes with a powder that by all accounts should be ideal.
I hope to learn more from this thread.