Pyrodex RS wasn't that bad when I used it in a few different guns. I could load it up several times without swabbing but eventually I would have to run a patch through. I have also shot the pellets with about the same results. If I recall correctly I could get around 6 shots or so before I felt the need to. Certainly nothing like having to swab between each shot. Never used Swiss and had about the same results with Triple 7 pellets but haven't used the loose stuff from what I can remember.