I love H4350...well in my 260rem anyway. I do wonder if it might be too slow, but I guess until you try it, who knows. Somewhere on here I think I read someone has had good results with RL17, or am I confusing this'd with another thread?
May have been me, I'm getting 2400 fps with the 320 gr Woodleighs in my Heym Mauser with RL-17, originally wanted to try and get 4000+ ft lbs of energy on the '06 sized case to gauge efficiency of the cartridge for a given amount of powder.
It proved that in spades and is hell for accurate to boot.
