Reaming Chambers

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May 26, 2025
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Rogersville/Ozark, MO
I have been loaned a chamber reaming and polishing tool for .22 LR revolver chambers.
Is it okay to use it on chambers in an aluminum cylinder?
I ask because I do not know whether or not the chambers in aluminum cylinders have some kind of hard, clear, transparent coating to retard corrosion and wear in the softer metal as compared to steel.
 
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I had a S&W model 317 for a while. Very lightweight , Aluminum frame and cyl. I wondered about wear in the cyl chambers but didn't see any in several hundred rounds of ammo. Chambers were very smooth and I feel sure that they were hard anodized to eliminate wear from the .22 ammo cases and bullets. I would not use a reamer on those chambers.
 
Why not call the Reamer manufacturer as ask them. I am not really familiar with working on Aluminum but calling the revolver manufacturer as well might be worth the effort. Between the two of them you might get some direction.
 
Several years ago I reamed my 317 cylinder with excellent results (along with several other S&W, Ruger, Taurus and Rossi carbon steel and stainless cylinders). Frankly I never worried about any coating inside the 317 cylinder chambers, since I figured routine use and subsequent cleaning would likely disrupt any such coating if it were indeed ever present in the chambers in the first place.

I have not seen any signs of corrosion or ill effects of reaming the 317 cylinder chambers, and would do it again in a heartbeat.

Lou
 
Several years ago I reamed my 317 cylinder with excellent results (along with several other S&W, Ruger, Taurus and Rossi carbon steel and stainless cylinders). Frankly I never worried about any coating inside the 317 cylinder chambers, since I figured routine use and subsequent cleaning would likely disrupt any such coating if it were indeed ever present in the chambers in the first place.

I have not seen any signs of corrosion or ill effects of reaming the 317 cylinder chambers, and would do it again in a heartbeat.

Lou
Thanks for the info.
 
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