Originally Posted by elkhunternm
I use RL-15 and H-4350 in my .375 H&H's.

Seem RL-15 is the most mentioned powder for the .375 H&H, H-4350 not that far behind.

One would think the new powders would work as well, maybe better.

I guess those two old timers work so well, there's not much incentive to experiment.

DF