Carbon Ring

[dutch14]

It's easy to cut an off-center chamber is a lathe. Just feed it faster than the tool will handle. Now an off-center chamber that is off by a specific amount requires a 4 jaw chuck and a lot of time. I doubt that any receiver manufactures require and off-center chamber in the barrel.

 

[TRSR8]

It's easy to cut an off-center chamber is a lathe. Just feed it faster than the tool will handle. Now an off-center chamber that is off by a specific amount requires a 4 jaw chuck and a lot of time. I doubt that any receiver manufactures require and off-center chamber in the barrel.

FWIW, not that it’s important, but been told that results in an oblong chamber.
Academic sinse I was told BC didn’t do it……was screwing with people, just as he was when he was pushing the “ managing the perfect carbon ring “ theory before the RF comp world figured out, simply remove it.

 

[Thylacine]

G'day blokes. I was chatting to a mate who shoots an Anschutz in our benchrest competition (I use a CZ), he said that Anschutz suggests that (I've used the AI answer) "Anschutz .22 LR rifle should generally have its action and chamber cleaned every 200–500 rounds to prevent functioning issues, while the bore should be deep-cleaned, using a proper cleaning rod and bore guide, every 500–1,000 rounds or when accuracy degrades." he tends to leave the cleaning to 1000 rounds the dreaded 'carbon ring' builds up in some chambers faster than others. My S&W 17 will show a buildup of carbon(?) after a few matches, however, not all of the chambers in the cylinder show the same degree of fouling build-up. Could some chambers be a bit tighter than others?

If you see the buildup at the bottom of the chamber first, thats most probably gravity or some gas + unburnt powder and carbon is leaking back under the case. Did the pressure of firing (23-25 thousand PSI) expand the case to seal the chamber and stop gas leaking back and starting a carbon build up? I really don't see this as a problem if you clean the gun after a session/match at the range with a pull through or bore snake (it's an army thing), I run a dry brush through the barrel and dry patch at home. Shock-horror, sometimes I leave this to the next day... My favorite gun cleaning products are Hoppe's #9 and Mill spec Break Free CLP and good clean brushes. Frequent cleaning won't wear your gun out but it will prevent carbon buildup.

 

[Tim Slater]

G'day blokes. I was chatting to a mate who shoots an Anschutz in our benchrest competition (I use a CZ), he said that Anschutz suggests that (I've used the AI answer) "Anschutz .22 LR rifle should generally have its action and chamber cleaned every 200–500 rounds to prevent functioning issues, while the bore should be deep-cleaned, using a proper cleaning rod and bore guide, every 500–1,000 rounds or when accuracy degrades." he tends to leave the cleaning to 1000 rounds the dreaded 'carbon ring' builds up in some chambers faster than others.

And that's why you shouldn't entirely trust AI.
Since the 1960s at least Anschutz have consistently recommended cleaning their match rifles after shooting.

 

[Steel Mover]

I keep a 22 LR Match reamer and a standard chamber reamer both, in my drawer. At times I need to clean up 22 LR chambers. 99% of the time they clean up well by hand when a carbon ring is involved.

 

[TRSR8]

G'day blokes. I was chatting to a mate who shoots an Anschutz in our benchrest competition (I use a CZ), he said that Anschutz suggests that (I've used the AI answer) "Anschutz .22 LR rifle should generally have its action and chamber cleaned every 200–500 rounds to prevent functioning issues, while the bore should be deep-cleaned, using a proper cleaning rod and bore guide, every 500–1,000 rounds or when accuracy degrades." he tends to leave the cleaning to 1000 rounds the dreaded 'carbon ring' builds up in some chambers faster than others. My S&W 17 will show a buildup of carbon(?) after a few matches, however, not all of the chambers in the cylinder show the same degree of fouling build-up. Could some chambers be a bit tighter than others?

If you see the buildup at the bottom of the chamber first, thats most probably gravity or some gas + unburnt powder and carbon is leaking back under the case. Did the pressure of firing (23-25 thousand PSI) expand the case to seal the chamber and stop gas leaking back and starting a carbon build up? I really don't see this as a problem if you clean the gun after a session/match at the range with a pull through or bore snake (it's an army thing), I run a dry brush through the barrel and dry patch at home. Shock-horror, sometimes I leave this to the next day... My favorite gun cleaning products are Hoppe's #9 and Mill spec Break Free CLP and good clean brushes. Frequent cleaning won't wear your gun out but it will prevent carbon buildup.

Well, FWIW, Anschutz has been generally wrong in that regard for some time.
Bleiker, for instance, other than pretty much eclipsing Ans. goes with frequent cleaning with guide, brush, proper solvent......pretty much same as many, many top RFBR shooters do, as well as particular attention.