Tips From The Workbench with Ken Brooks–Polishing Chambers

kenBrooksAGI Gunsmithing Instructor and Master Gunsmith
Ken Brooks operates
 PISCO Gunsmithing in Oregon.

Always willing to teach and share his experiences, this time Ken answers another AGI student’s question. He takes the time to show you the procedures and tools he uses to polish chambers. He demonstrates the procedure on a tight .22 cal chamber. As usual his methods are simple, straightforward and easy to execute.

5 Responses to Tips From The Workbench with Ken Brooks–Polishing Chambers

  1. Well said and done Ken!

    I’ve used Ken’s chamber polishing method several times on .22 rimfire chambers and it works great.

    Ideally the way to polish the chamber is if you can get straight on into the chamber without having to remove the barrel, such as in bolt actions where only the bolt needs to be removed to allow access for a long, polishing mandrel to go on straight through the receiver and into the chamber.

    For semi autos it’s not always viable nor a good idea to remove the barrel. If the barrel is pinned into an alloy receiver I do not remove the barrel because the barrel may fit loosely into the receiver when it is reassembled and pinned back into the receiver.

    Removal and re-installment of those barrel retaining pins will shave away small amounts of alloy from the pin holes in receiver in which will eventually cause the pins to fit loosely. The end result being barrel movement (not good!). I had a gun come in like this but for money’s sake the owner did not want anything done to it at that point. I wrote an article in a past GCA’s GunTech magazine that has a section covering how I polished that gun’s chamber. Fun stuff to do and highly rewarding for the gun AND the gunsmith!

    Thanks for the video Ken!

  2. Method works well. I use it on a regular basis. I also use it for polishing cylinders on western action revolvers and break open shotguns so the shells will fall out quickly during competition.
    Good presentation.

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