Burley
RL33 is a dirty powder for sure. Carbon build up is a problem in the 28 with it also. Normally around 50 shots I scrub the neck/throat and push a few patches through and all is well. Retumbo shouldn’t be as bad but less velocity. N570 if you can find it is the powder to use in the 28.
I’m lucky to get 30 rounds without having to get the Carbon out of the throat. I’ve got 14lbs of N570 now, so no more RL33.
