Tight .22LR chambers

Back in 1960 my dad bought a LR cylinder for his model 48. It too had tight chambers. He never did anything about it. I eventually reamed and honed them. The magnum cylinder was just fine.
 
I’m relatively new to the revolver world but I have years of experience with SxS shotgun work. The chamber gets smaller as the reamer gets sharpened. There is a + and - spec for chambers. The problem comes when chamber is at or below the - spec and the ammo is at the + side of the spec. This is further exasperated by today’s low quality ammunition and use of steel vs brass in cases.
 
I'll chime in,. Not a revolver, but a Model 41. Won it at auction and figured out quickly why it went to auction.
Failure to extract. Cleaned it, changed the extractor, springs and nothing worked. Finally, sent it to S&W and 8 months later finally get it back and it runs flawlessly. I suspect thats what they did, reamed the chamber.
Had I known I'd have done it myself. April,1977 manufacture.
 
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