I don't shoot 1000's of rounds but I don't see this crud ring issue either. The TC Triumph will only shoot 2 shots then needs a wire brush and good for two more. It loads sabots pretty tight. I haven't tried harvester sabots yet, but I'm not interested in powerbelts. Not much difference between TC super glides shock waves and Barnes bullet/sabots loading through the Triumph, both are tight. BH is a good powder.