...that you use to take out the dry fire peen on a 22 chamber rim?

Rimfire chamber ironing swage.

thanks.........

Or just chamber iron. If you can get to it without too much trouble, a tapered punch will also work.

And get thee some snap caps!!

Or some yellow (#3?) screw anchors. About $3 per 100. Last for several rounds and extract normally. Don't expect them to feed from a mag. You can't have everything.

Paul

a slow taper punch smoothed to a mirror finish, in a drill press .....then gingerly used with lubrication... with discretion and care.

👍👍👍

https://www.tandemkross.com/ChamberMadeChamberIroningSwage

This tool is what you need