I have a friend who has a nice collection of back issues of The Fouling Shot. That's the Cast Bullet Associations monthly. I remember reading of member's horror stories of ringing their chambers. The rifles I recollect being damaged most frequently were Trapdoors. The stories I remember had a common theme. For years they had shot their rifles with mild smokeless charges, then in an effort to tighten groups they added dacron. In twenty shots they noticed hard extraction and there was the ring. I will borrow the Fouling Shots and search for documentation to augment my memory.

L Ross