Rich and all,
This is a good discussion, one that I didn’t see until today. I started Shooting BP back in the 70s when fiberglass rods were available. We were told they were too abrasive and would ruin a barrel. So, we used hickory and then went to stainless steel with guides for the muzzle. I have no rifle with worn muzzles, but have wondered about it.
Designing a test would be really tough. Think of all the variables you would need to deal with. I thought about making a variables list, and decided that was impossible. Let me just ask this.
Do guns that were shot leaning on a loading bench have different wear patterns than one mostly loaded in the hand? I’m not going to loose sleep over this.
Regards,
Pletch