With frequent use...there should be no carbon ring issue.
If you use ANY carbon cleaner, such as Carby Kleen, Brake Kleen or CLR when you do have a carbon ring, let it soak for 10-15 mins. I soak a cotton bore mop, push it in tight and dribble more in from the muzzle. Let it sit in place, soak then remove it and douse more on a bronze brush. You can use a hand drill to spin the brush, but stroking it back and forth works. I normally use a worn out brush or an undersize brush.
Cheers.