Thanks underclocked,interesting reading.One fellow said that he tried #11 caps and the ring went a way,I tried it in my ruger and it uses #11 and it is there.One stated it was with all the powders but I have been shooting a long time with cleanshot,pyrodex powder and pellets and I have not noticed it with them.One said he just ran a spit patch down the barrel,I have done that a long time between shots using pyrodex but with the T7 I have to work the patch up and down to break the ring free,and like Mike said if it goes past the crude ring you have to take the breech plug out just to get the ram rod out. I don' t know why I keep trying the T7 guess I am trying to find out how great it is,some don' t seem to have any problems with it.I have a good supply of pyrodex and clean shot I can switch too before hunting season.