This thread reminded me of way back when Ruger had first introduced their .357 Blackhawk, I found one in a pawn shop, with the barrel so leaded up from firing lead bullets, it looked like a dirty .30 caliber barrel. The price was right for a pistol that had only been out for less than two years, so I scraped up enough and bought it. Was stationed at the Army post, so went on post, managed to get several pistol cleaning rods, and a number of .45 brushes. By clamping the pistol rod in a bolted down machinist vice, then pushing hard, was able to get lots of large chunks of lead out. Destroyed several brushes, but ended up with a veyr clean, sharp bore. Still have that old Ruger, but do not shoot lead in it. Either jacketed hollow points, or gas checks on hand loads. No more leading problems either. I don't know for sure, but full power .357 seemed to be hotter back then than they seem today, maybe that is just a failure of memory on my part also.