I was getting a small amount of build up but I also clean between every shot and would still do that, I'm pretty happy with the 777 powder and primers maybe I'll try one some day but I think for now I'm going to stick with what works. Ive got a lot of other things to learn about ML shooting yet
I have always hunted with a bow but do to nerve problems in my arms I just don't have hat it takes to stay up to par on my shooting skills so I figured ML would be the next best thing.