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OM vs NM Cylinders

This is a discussion on OM vs NM Cylinders within the Ruger Single Action forums, part of the Pistol & Revolver Forum category; Are Single-Six cylinders the same dimensions between OM and NM? In other words, can an OM .22mag cylinder be placed into a NM revolver and ...


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Old April 6th, 2017, 07:30 PM   #1
 
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OM vs NM Cylinders

Are Single-Six cylinders the same dimensions between OM and NM?

In other words, can an OM .22mag cylinder be placed into a NM revolver and vice-versa?

If the OM cylinder matches the dimensions of the NM cylinder - can they be swapped?

Okay, here's the deal:

I have an OM 3-screw single six convertible now.

I know where I can buy a 1977 NM SUPER single six .22 ONLY w/ 9-5" barrel - very reasonably.

If I buy it, is there a chance that my OM magnum cylinder might fit and function in the NM Super Longtom?




Maybe I should take the magnum cylinder to the LGS and see if it fits?

(sorry for being so wordy)




Last edited by Hossbreed44; April 7th, 2017 at 06:24 AM.
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Old April 6th, 2017, 07:45 PM   #2
 
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Pretty good chance it will fit. I had bought a NM .22lr cylinder and it worked just fine in my OM Super Single Six.

You mentioned it's at an LGS, so just bring your cylinder along and ask to see if it fits.
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Old April 7th, 2017, 04:20 AM   #3
 
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I have had 5 single sixes and 4 of the revolver's cylinders will interchange one will not.
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Old April 7th, 2017, 05:35 AM   #4
 
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And on the other hand, there are cases where a cylinder will JUST BARELY squeek into the frame with the ratchets firmly against the recoil shield and the front face of the cylinder actually sliding against the rear end of the barrel so tight the cylinder cannot turn . . . and there's a considerable gap between the end of the cylinder gas ring and the frame.

No ready fix for this. Machining off the cylinder ratchets to allow it to turn may compromise the headspace and pawl engagement and it compounds the gas ring gap situation. Machining off the face of the cylinder to clear the barrel may do it but may or may not resolve the gas ring clearance situation . . . same situation with machining off the rear end of the barrel.

Ya just gotta see what you can come up with.

Part of the fun.

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Old April 7th, 2017, 07:22 AM   #5
 
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Just did the same thing last Fall with buying a silver mag cylinder for my 9 1/2"er. Drop in with no shake or rattle. Never have had either with over 30 Rugers I've interchanged.
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Old April 7th, 2017, 10:18 AM   #6
 
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I went to my LGS with my OM .22 magnum cylinder in hand, but that 1977 NM Super Single-Six Longtom had been sold

I snoozed...I losed!!!

I'll keep lookin...

Last edited by Hossbreed44; April 7th, 2017 at 10:21 AM.
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Old April 7th, 2017, 04:13 PM   #7
 
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There might be one or two more out there. Should wait for an OM to keep the string going.
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Old April 7th, 2017, 04:49 PM   #8
 
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Quote:
Originally Posted by KidVermin View Post
Should wait for an OM to keep the string going.
Yes, you're right.

I should stay the course...

Old Model 3-Screw Rugers RULE !!!

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