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The chambers would be easy to fix by reaming to 22mag and then lining the cyls with fired 22 mag cases with the back of the case cut off. A 22lr fits nicely inside of a 22mag case but there is still the soft metal indicated by both the ratchet and the metal of the cyl being "sticky" and cutting poorly. Your cyl my have missed being hardened or simply made from soft steel.
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I agree with contacting Pietta. As mentioned, looking at the ratchet star, it doesn't look like it would last long. Part of it looks like low quality soft steel.
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I have had 3 new Heritage revolvers with cylinders like that and they all went back to the factory. There is no real fix for that.
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FWIW, once upon a time, I had a .22Mag SA revolver with the same issue.
I fixed it quickly via using a .22 Flex-Hone cylinder hone from Brownells - with cutting oil, chucked in a homeowner's hand-held variable power drill.
https://www.brownells.com/gunsmith-t...m-prod651.aspx
https://www.brownells.com/userdocs/s...80001177_2.jpg