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.