Re: 338 rum loads?
I have had very good luck with the 225 AB and IMR 7828 out of my 700 338RUM. I am using moly coated bullets. I started at 90 grains and worked my way up. I believe I stopped at 93 grains, but don't quote me on that. I got 3050 fps at the top end before I got pressure signs. Keep in mind this is with a 26" barrel that has been ported, so I probably lost a little velocity.
I got pressure signs at lower velocity with both H1000 and Retumbo and powder charges were compressed with Retumbo. The IMR 7828 fills the case nicely.
I have been getting 1/2" groups with the 225AB. I think you will like it.
Best of luck, Sam
The critters have to win every time, I only have to win once.
NRA Life Member