Originally Posted by rhmc24
Here are notes of jobs I have done. I tried to post them above in Forum Primer but it is closed.
Fix Chamber on .22RF Dinged by Firing Pin
This issue comes up now and then, with various suggestions offered. A simple fix I have never seen mentioned is this. A #1 drill, is .228", the same as many22 chamber IDs. On a #1 drill, grind a flat half an inch long or more, maybe .040" deep, along the side of the drive end of the drill. Smooth the transition edges from flat to round and polish them. Lube the chamber and your tool, insert it 3/8" or more and turn it to lift or iron out the ding in the chamber.
Sounds 'quick and dirty' but it works. There are dirtier methods that can work too.
I always thought it best to remove the dinged metal and smooth the edge leading into it rather than replace the metal which can be dinged again.
Maybe that's one of the dirtier methods you refer to?
Frankly I never understood why they don't simply design it with a shallow indentation where the pin strikes, thus eleminating ever the problem. I can't see how it would effect the feed, especialy on a bottom strike. Just one of those things that bug!