There are a couple of new powders available that have been wanting to try. Not really new but new to me. The Alliant 10x and Hodgdon's Varget.
There is data for them but mostly for smaller calibers and target applications. What I would like is info about loading Varget in 375 H&H and 10X in 450 Marlin, 458 Win, etc for hunting loads. Varget is close to RL-15 in burning rate and 10x was to replace the old RL-12, which was my favorite powder for the 458 Win Mag.
I bought a bunch of bargain priced powder here lately and I'd like to burn some of it. I've never used the 10x but have used Varget in 223 and 308 Win. I guess I'll just 'seat of the pants' load it if I have to.