RL-33

I've had good luck with RL33 in 338LMAI, 338LM, and 7RM w/195's. A buddy has been running it in his 300WM w/ 215's. For the big stuff, you'll run out of case capacity just before pressure, which isn't optimal but it isn't bad. The belted's you won't get as much velocity as say RL26, but it's still a good stable powder if available.
 
Care to share the details?

Been using Retumbo in my 338LM with the 285gr ELD-M, but got a pound of RL33 to play with.
Use at your own risk i.e. you assume all responsibility for using this.

Now the disclaimer is done. 97.4grns RE33, it gets you around 2780sh fps. Not as fast as my Vhit N570 and 300grn Scenars but so far, last time I should that load from Mark it shot really nicely.