Years ago, with another 7mm-08, Norma n-204 proved to be an excellent powder. I still have part of a can.

Norma URP is very close to n-204, may be it's replacement; I have a can of that, too.

IMR-4320 burn rate is close to RL-15. I don't see it getting much attention, may be worth trying. Some of the IMR series aren't that temp resistant, don't know about this one.

For the time being, I'm sticking with Big Game, just wanted to give credit to those Norma powders as good options and to mention IMR-4320.

DF