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S&W Revolvers: 1961 to 1980 3-Screw PINNED Barrel SWING-OUT Cylinder Hand Ejectors WITH Model Numbers


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  #1  
Old 08-26-2010, 12:26 PM
1891SingleShot 1891SingleShot is online now
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Default Model 48 .22 LR Cylinder

I have a Model 48 .22 MRF and I know you could put a .22 LR cylinder on these. My question is whether there is a specific .22 LR cylinder made for the Model 48 or will any K-Frame .22 LR cylinder work (Model 17 or 18). Thanks.
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Old 08-26-2010, 02:15 PM
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Old 08-26-2010, 10:46 PM
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There were 22 LR cylinders for the M48 but I'd be suprised if you could just take one from some other K frame and it work in your gun. But I'm no expert. Do you have a M17 or M18 you could try? Maybe a friend's? If you do let us know how it fits.
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Old 08-27-2010, 12:24 AM
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1891,
My pre-18 cylinder measures 1.615" over all and the pre-17 cylinder just a couple thousanths longer. See how that compares?
Sorry, I don't have a Model numbered K-22...
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Old 08-27-2010, 08:58 AM
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Quote:
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1891,
My pre-18 cylinder measures 1.615" over all and the pre-17 cylinder just a couple thousanths longer. See how that compares?
I just measured my Model 48 cylinder and it also measures 1.615". So maybe any of the K-22 cylinders would work???
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Old 08-27-2010, 09:50 AM
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Any K frame 22LR cylinder will work but you still have to have it fitted.
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Old 10-09-2016, 06:53 PM
Jersey Doug Jersey Doug is offline
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No wrong, there's a difference between the dash numbers. A 17-4 cylinder will fit on a 48-7 but the hammer won't fall. There is an old style, new style change that took place on the rotating mechanism. There are new style cylinders offered and would probable fit on the new style 48-7. Having worked in a machine shop down to half thousands tolerances would think there's a pretty good chance with the degree of today's technology an unmatched (unfitted) cylinder could be fine as is.

Last edited by Jersey Doug; 10-09-2016 at 06:58 PM.
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Old 10-09-2016, 07:04 PM
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Smith Wesson will not fit a .22 LR to a model 48 or 63, I aleady asked that question a few weeks ago.
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Old 10-09-2016, 07:05 PM
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Folks bought the M48 for it's caliber, ie: 22 mag. If you want to shoot 22LR buy a revolver chambered for it.
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Old 10-09-2016, 07:20 PM
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Quote:
Originally Posted by Barr1 View Post
Smith Wesson will not fit a .22 LR to a model 48 or 63, I aleady asked that question a few weeks ago.
It's kinda pointless to fit a 22 l r cylinder to a 63 , isn't it ?
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  #11  
Old 10-09-2016, 08:03 PM
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Lowriderfixr, you are right. I replied in a hurry. I meant a model 51.
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Old 10-10-2016, 12:13 AM
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They used to fit .22 LR cylinders to their customers' .22 WMRF guns when they were both current products, but has been mentioned, current cylinders and extractors won't fit old guns. S&W has no more old cylinders, so, no, they can't and won't.
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Old 10-10-2016, 12:31 AM
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Shame. I had a 4" 48 back in the early 80s with interchangeable cylinders. No box or info, so I don't know, but supposed that someone had the second cylinder fitted at some point. Wish I'd hung on to that one.
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Old 10-10-2016, 12:55 AM
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Quote:
Originally Posted by 6GUNSONLY View Post
Shame. I had a 4" 48 back in the early 80s with interchangeable cylinders. No box or info, so I don't know, but supposed that someone had the second cylinder fitted at some point. Wish I'd hung on to that one.
I bought that exact item several years ago. The story I got was that the LR cylinder has had 11 rounds run through it, and the original magnum cylinder had never held a round.

Complete with factory box, etc. I wonder at times what it is worth, as I need to do some thinning. Any ideas, guys?
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  #15  
Old 10-10-2016, 12:56 PM
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Quote:
Originally Posted by 1891SingleShot View Post
I just measured my Model 48 cylinder and it also measures 1.615". So maybe any of the K-22 cylinders would work???
Probably would work but, IMHO you'd be better off letting the factory fit and install it?
Steve
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Old 10-10-2016, 01:36 PM
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I had a M48 and contacted Lee's gun parts in Irving Tx and he had a 22lr cylinder that I paid $40 for, put in in and it worked fine. Don'"t know what model it was but it fit perfectly and like a fool it got away from me in a trade. As always the old firstsoldier.
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  #17  
Old 10-13-2016, 05:22 PM
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There are frequent ( almost every week) auctions for M-17 L.R. cylinders on Ebay. They range in from $150 -$200. IF you have (say) a 48-4 and find a 17-4 cylinder would work, may or may not need an additional adjustment. The important part is matching the "dash" suffix number.
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  #18  
Old 10-14-2016, 11:00 PM
nutsforsmiths nutsforsmiths is offline
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I bought a 1977 made 48-3 in the mid-1990s. I sent it to S&W in 1997 and they fitted it with a 22LR cylinder. I have a factory letter for the pistol and I also kept the paperwork for the cylinder work too.

It works quite well, but really, I rarely use the 22LR cylinder, since I have a Pre-17 and Pre-18 I can use instead. The 48 has the 8 3/8" barrel and shooting the 22LR out of that is kind of fun, but the 22WMR are more fun for me.

The pistols is in excellent shape but doesn't have a box or papers. I have no idea what it is worth today.
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Old 10-14-2016, 11:08 PM
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Just to learn something today is the spare 22L cylinder numbered to the gun because its custom fit?

Saw a M53 with a spare 22 L cylinder but was not numbered. Being -3 maybe no?
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Old 10-19-2016, 11:54 PM
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Where the the problem lies with the Long Rifle cylinder in a M-48 mag is with the loss of confidence in accuracy. Because of the different bore size between the two,,, shooters believe once that L.R. cylinder is mounted on the 48 there goes it's accuracy. Shooters (I'm one of them) do not sit well with anything that possibly could subtract a revolver's accuracy in the least. History of the conversion has most believing the L.R. bullet would do it's best in the gun it's intended for the M-17-M-18. I went the two gun route and lost all interest in mix and matching cylinders.

Last edited by Jersey Doug; 10-20-2016 at 12:34 AM.
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  #21  
Old 10-20-2016, 08:53 AM
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Quote:
Originally Posted by Jersey Doug View Post
Where the the problem lies with the Long Rifle cylinder in a M-48 mag is with the loss of confidence in accuracy. Because of the different bore size between the two,,, shooters believe once that L.R. cylinder is mounted on the 48 there goes it's accuracy. Shooters (I'm one of them) do not sit well with anything that possibly could subtract a revolver's accuracy in the least. History of the conversion has most believing the L.R. bullet would do it's best in the gun it's intended for the M-17-M-18. I went the two gun route and lost all interest in mix and matching cylinders.
I'm not sure but, Ruger's have different bore diameters. LR and magnums.
S&W would probably be the same?
Steve
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  #22  
Old 10-20-2016, 09:57 AM
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S&W's nominal bore size for 22 MRF (WMR) is 0.224". For 22 LR it is 0.223". Therefore only 22 LR bullets that are of soft lead will upset enough when shot thru the larger bore of a 22 MRF to fill the bore and not skid down thru the rifling some. Usually (but not always) the higher velocity 22 LR cartridges lose some of their potential accuracy when shot thru the M 48.

As I found and have been expounding upon, if you want a 22 LR/22 Mag combo handgun, for the best accuracy, it is far better to start with a 22 LR in a "K" frame and add a 22 LR cylinder that has been rechambered to 22 Mag. ..............

BTW; S&W's nominal bore size for the 22 Rem. Jet is 0.222". So, 22 LR is usually very accurate when shot thru that barrel.
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Old 10-20-2016, 11:20 AM
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Quote:
Originally Posted by paplinker View Post
Just to learn something today is the spare 22L cylinder numbered to the gun because its custom fit?

Saw a M53 with a spare 22 L cylinder but was not numbered. Being -3 maybe no?
A 22 rimfire cylinder for a Model 53 will NOT fit a M17/48, its
too long. I believe it's 1.66" in length.
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Old 10-20-2016, 11:24 AM
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Hello again B.C.
I'm reading huge cautions of sending the .22mag down a S&W L.R. barrel because of "possible" over pressures???? You have actually tested your theory successfully but it's hard to overcome the decades of mindset to the contrary. There is so much metal around a .22 barrel and cylinder of a M-17, 18 (being it's an under-bored .38) doubt the little .22 mag has the power to do any damage.

Last edited by Jersey Doug; 10-20-2016 at 11:26 AM.
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Old 10-20-2016, 12:11 PM
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Big Cholla, keep in mind that S&W can't even get the B/C gaps right for best accuracy in todays world what makes you think they can achieve bore diameters with skill. You do realize most machine tolerances today are done in Microns not .001"? Alas, they seem to be able to charge more than their closest selling revivals do.
Steve
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Old 10-20-2016, 12:19 PM
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Quote:
Originally Posted by Jersey Doug View Post
Hello again B.C.
I'm reading huge cautions of sending the .22mag down a S&W L.R. barrel because of "possible" over pressures???? You have actually tested your theory successfully but it's hard to overcome the decades of mindset to the contrary. There is so much metal around a .22 barrel and cylinder of a M-17, 18 (being it's an under-bored .38) doubt the little .22 mag has the power to do any damage.
JD: You are right. The Naysayers will preach and preach an old 'belief' without any checking of the real physics involved just because it is an old belief and therefore 'must' be right. One must always remember to compare apples to apples and oranges to oranges.

IMHO, 'damage' to the steel of a 22 LR barrel/cylinder just isn't possible from the pressures developed by a 22 Mag. But, where real damage is possible from even the lowest pressure brass cartridge/bullet combination is blow out of the brass case. Then little bits of brass, unburned powder and remnants of combustion get expelled to places that they should not be like eyes. I have never seen nor have I ever even heard of a brass case rupture of a 22 Mag cartridge fired in a 'proper' chamber.

I worked on a Japanese WW II M 99 rifle that was rechambered to 300 Savage brought into the rifle shop I worked at in Reno. The owner wanted a recoil pad installed because this rifle kicked worse than anything the owner had ever experienced. It fell to me to install the pad. While I was working on the stock I was looking over the action and barrel. Rechambering the M 99 to 300 Savage was a fairly common practice at that time. By happenstance I had a 30 cal. cleaning rod lying on my workbench. I decided to clean the barrel and take a good look at the rifling. To my surprise the cleaning rod would not enter the barrel. I grabbed the pin gauge box and worked to determine the diameter of the rifling lands. I found the barrel was 6.5 mm barrel! It wasn't common for the M 99 to have been barreled in 6.5, but it obviously did happen. This man had been shooting 30 caliber 300 Savage cartridges thru a 0.256" bore for years. I ask him how was the accuracy. He said it was never 'great', but he had taken several mule deer with the mischambered rifle. No wonder this rifle was an extreme recoil-er. It was a good thing that the Arisaka bolt action was one of the physically strongest ever made.

This story is a long winded example of extreme over pressures that can happen with no consequences. IMHO, The relatively very slight up-tick in chamber pressures developed by shooting 22 Mag thru a bore 0.001" smaller in diameter as compared to the great steel in S&W cylinders is of no never mind.
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Old 10-20-2016, 12:51 PM
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I already have a brand new M-48-7 Classic Series .22 mag. Soon I'll be buying a brand new M-17-7 (matching dash numbers) .22 long rifle as temporary donor. . Going to switch cylinders, run tests and post the results. Heard numerous accounts in the past where matching dash 4's were switched without shaving lead or other problems,, want to see if the new dash 7's are that pliable too.

Last edited by Jersey Doug; 10-21-2016 at 08:13 AM.
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