From my TIKKA T3 Lite in 9.3 X 62, getting 100 fps more from RL-17 than RL-15 with the same 286 NPs. Less pressure and accuracy sub-MOA.
"100 fps more" translates to 2546 fps. It's the only powder that will be used in my 9.3 X 62 going forward. Slower than RL-15 and faster than IMR4350 and H414. About perfect for 286s, I'd say. My COL is 3.36" with NPs.
And, it's not a "short and fat" case as everyone knows.
Cases last "forever".
I could well believe it to be among the "best" powders for the .375 H&H.
Bob
www.bigbores.ca