Cylinder Ratchet Damage

[Pete]

What would cause burrs to be formed on the sides of the cylinder ratchet of a New Model Single Action Ruger? These burrs are being formed after the revolver is cycled many times and interfere with the rim of the cartridge on extraction. :?:

 

[DGW1949]

I'd be taking a good look at the pawl. It's design aint quite as simple as it first looks, and details mean everything.
I've also had what I call "tight carry up" after I've set the endshake on a cylinder too tightly. I'm talking about .0005 too tight can make quite a bit of difference in how the pawl and cylinder-ratchet interacts.

I'm a bit lost on how burrs on a ratchet can "interfere with the rim of the cartridge on extraction" though. Possibly you've got some ratchet-impressions on the recoil shield which might be effecting proper indexing while the cylinder is suppossed to be free-wheeling?....I've seen marks like that on hard-kicking center fire revolvers a lot, but not on a .22....that and/or I'd STILL be checking my pawl.

Hope this helps.

DGW

 

[Pete]

Thank you!The cylinder is one from a .32 H&R Single-Six.The rims already are very close to the ratchet and a raised burr makes for hard extraction.

 

[c.r.]

pete,

I had a similar issue w/ a freedom arms and a ruger sbh. the fa, I caught early, sent it back, they cleaned up the burs and fitted new hand. the sbh had at 2k+ rounds through it. ruger replaced the cylinder and fit a new hand. in both cases I would have expected the pawl/hand to have worn before the ratchet, but..................

 

[Hondo44]

The pawl is harder than the cyl ratchet. I bevel the edges on the ratchet that burr over and no more problem. There's no reason for a sharp edge at the point on the ratchet. It's now part of my regular tune up on any new SA Ruger.