I recently bought a used GP100 in SS and have been shooting both 38 spl and 357. The cylinder has a fair amount of carbon gunk from shooting the 38's and I've tried just about everything to clean it with no luck. I've scrubbed, used Gun Scrubber, etc but no noticeable difference. It's not enough to cause the 357's to stick but is annoying me - any tips?
Thx
Thx