NM OM Single Six Interchangability

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medicdave

Blackhawk
Joined
Feb 19, 2009
Messages
535
Location
Maine
Will a NM 32h&r barrel and cylinder work in an old model Single Six frame? Curious, buddy has the parts and an OM 32 would be a fun project...Dave
 

flatgate

Hawkeye
Joined
Jun 18, 2001
Messages
6,784
Location
Star Valley, WY
I dunno, I always had heard the threads matched and just the "shoulders" were slightly different, but, in another post here on the Forum a member is having trouble swapping barrels from one .22 to another.......

Ask Alan Harton or one of the other pro's.

JMHO,

flatgate
 

Aeroscout9

Single-Sixer
Joined
Sep 7, 2008
Messages
220
I just bought a 32 barrel and cylinder from Gallagher on GB for this same project.... I have read they are the same thread pitch and cylinders are supposed to be the same length. I hope so... I guess if it didnt work it wouldn't be the worst thing i've ever spent $100 on.

Joe
 

Aeroscout9

Single-Sixer
Joined
Sep 7, 2008
Messages
220
Well Crud. I removed the barrel from an OM SS this weekend and wouldn't ya know, the threads are way different from the NM SS 32 barrel. The 32 cylinder could be fitted easily enough. The threads are a no-go though..... DANG IT!
 

flatgate

Hawkeye
Joined
Jun 18, 2001
Messages
6,784
Location
Star Valley, WY
Aw, rats, I didn't figure on a thread pitch change.....

Besides, there's that pesky firing pin change from rimfire to centerfire.

flatgate
 

Aggie01

Blackhawk
Joined
Oct 16, 2008
Messages
968
Location
Texas (DFW)
I would think the issue is shank diameter, not just a pitch issue. Just looking at my .32 last night, the thread diameter is large enough that it has cut into the top strap. My .22's don't look like that. Ruger and Power Custom use different pawls for the .32 and the .22, though I'm not sure what the difference is.
 

Aeroscout9

Single-Sixer
Joined
Sep 7, 2008
Messages
220
Yes the firing pin / bushing change out was probably going to be the most time consuming / expensive part of the switcheroo (prior to finding out the threads are different). Oh well.... More to follow.
 
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