Buckshooter,
Just my experience, but when I shoot Powerbelts with Triple 7, unless I am actually hunting, I always have a utility rod next to me with a cylinder shaped jag attached. After every shot, I run a damp patch (with TC solvent) on it down the barrel, pull it out, flip the patch over, run it down and out again, and then run a dry patch down and out. This takes me about 15 seconds.
Doing this, I have shot as many as 50 rounds, without having to stop and do any more cleaning. Who knows, maybe I could have shot 100 rounds?
Final clean up is then very easy. I never pull the breach plug. Just 4 or 5 wet patches, followed by a couple of dry ones, and then clear the nipple hole with a proper sized drill bit. A light coat of oil down the barrel and I'm done. Takes about 10 minutes.
Mannyrock