If you want 375 H&H 300gr velocity from a 286 Nosler Partition in a modern 9.3 X 62, try RL-17. I did last week and I'm getting 100 fps more than with RL-15.
As to recoil? Well, my 7.2 lb (with scope) Tikka (22.4") at those top velocities is more than either a 7.5 lb 338 WM (250gr at 2750) or a 8.5 lb 375 H&H (300gr at 2550), barrel lengths equal!
Getting pretty close to 50 ft-lbs! But I'm used to 60+, so it's no big deal as far as I'm concerned.
But contrary to much of what's posted on this thread, the 286 NP passes the 300gr NP from the H&H at 200 yards in both momentum and kinetic energy. Also ahead of the .338 WM and it's 250 NP at all ranges in momentum, except in trajectory the 338 is slightly flatter.
I'll not vouch for the same results in anyone else's rifle... just in mine.
Bob
www.bigbores.ca 
