Does anyone have any experience loading 180 Nosler AB, RL19 powder specifically for use in Ruger77. I have measured the necessary length in the chamber but that is much longer than the length in the magwell, so I have to use the max length in the mag well as my determining factor.

I have not used RL19 to load 180 ABs. Will it fill up the case too much so I can not seat the bullet deep enough?

Right now I am using IMR4831 and I would like to change to RL19 because it measures easier (at least RL22 did) and I can get about 100 ft/sec more velocity. In this area I can not get IMR4831sc.