I shoot between 20 and 60 rounds between cleanings. A couple of patches of Shooters Choice, 5 passes with a SC applied brush, both ways, stop and apply more SC to the brush at the muzzle end, 5 more, apply more, scrub more based on "feel" If brush don't feel right, I scrub until it does. Patch out. If 50 or more through it, tight patch with JB short stroking the first 3 to 4 inches of the throat then on down through maybe 2 full length passes. Patch out with SC wetted patch, followed by dry. Tight dry patch pushed to end of barrel and then slowly pulled back through breech. If it gets tight or rumbles at throat, it gets more JB. If 100 through it since last copper check, Short stroke jag soaked with Sweets, jag hanging out of bore, load up clean patch with Sweets, pull it back through breech. Wait a couple of minutes. Clean patch ran through from breech. Repeat until no blue. Then dry patch out. Kroil patch through the bore, followed by a dry patch. Gun scrubber on 2x2 patch wrapped around brush, clean and dry chamber. Recoil lug area with dental roll thing, grease bolt, done.
Current highest round count is on a 7wsm with about 1250 through it. Shoots mostly 3s and 4s, occasional surprises either side of that. My bigger boomers usually 4s and 5s. I've lost barrels letting carbon get away from me. Ain't doing that again.
Interested in what other folks do too. If screwing off the brush every pass would guarantee shaving .1 at 100, I guess I would do it.