This is my first post in the rimfire section as I am mostly a centerfire guy. A friend of mine asked me this morning at church to look at his M93. He says he is getting more misfires than otherwise and that the case head shows a light strike. Anyone else with this problem? Where do I start to help fix his rifle? I am familiar with this model since I have a left hand M93. Mine has been flawless and very accurate, so I was surprised to hear he had this issue. The only issues I have know of were magazine feeding issues and extraction problems. Any help is appreciated. Thanks in advance.

Leon