I believe it might have been my post.
I actually think the short barrel makes less carbon in the suppressor. Maybe from more pressure at the muzzle? I don’t know.
I had shot a few thousand rounds (wasn’t counting) from other rifles, mainly being 20-26” barrels. When I put the suppressor on my short creedmoor I was having problems with it breaking a lot of carbon loose, and that said carbon going down the barrel to the action and chamber. I’m guessing this happened because I built up a lot of carbon with low muzzle pressure cartridges, and went to the shorty with a lot more. Just my theory.
Anyways I cleaned my ultra 7. It was 2oz heavy on carbon. I filled it with clr and got it back down to 8oz. Personally I can’t see just letting carbon build up and carrying around un needed weight.
FWIW, the carbon didn’t cause any failures to fire, it caused occasional pressure if the gun was carried muzzle up for a while, jostled around, and shot. Had I continued to fire it I’m sure like my other rifles to a lesser degree it would knock the stuff that was loose off and create it’s own layer wherever the rifle left it.
It’s not hard to clean out atitanium can. Threw it in a gallon jug with an earplug in the end, filled with clr I got for 15 bucks at Home Depot. 2 cycles got it down to a half ounce heavy, that leftover carbon quickly loosened up when shot, getting it back down to spec weight. That gallon will likely clean it a dozen times.
Probably something I will continue to do every few thousand rounds, or a couple ounces of carbon.