IMR 4451 47.4 grains is getting 2900fp out of mine. Shoots well. I am going to try RL16/17 or N550/150 to see how much more velocity I can get with those.
I have RL17 on hand. I'll probably purchase some N550 to try.
Per my experiments IMR-4451 isa 2.5% hotter than H4350.
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway The man who makes no mistakes does not usually make anything.-- Edward John Phelps