grinder67 problem solved with declining accuracy
Grinder, I just posted to your question about your loss of accuracy in your inline rifle.
I hope it went through, but not sure so I'm doing a general reply too.
Anywhoo, after I experienced the same problem, I found / read an article by writer Randy Wakeman who suggested replacing the breech plug. It worked perfectly for me. Hope it helps you too.
jimsmokepole