Roundoak I forgot to tell you about IMR-4320 powder as it was something I found out years ago myself. I had a 6mm that would simply not shoot good over 27 or 2800 fps.
Then I found the 4320 and it was like a crystal ball on my bench. The hotter the load, the tighter the group. The rifle ended up shooting a .385-MOA that day. I too was a happy camper.
