Rolling block in either 22 mag or 17HMR. - RimfireCentral.com Forums

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  #1  
Old 10-11-2019, 06:08 PM
dangerranger
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Rolling block in either 22 mag or 17HMR.



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I found a complete action for a #4 rolling block. It is left over parts from another build. It's Bolt face and ejector are cut for 25 rimfire. Does anyone think that 22 mag or 17 HR would be too much for this action?
I have heard that these actions could be converted to centerfire, and held up fine. But I cant find anything that says what they can stand.
I know my grand dad had a Roller converted to 25 ACP. That was his squirrel gun. Should I look at the bolt force of 25 and 32 ACP and compare that to the 17 and 22 mag?

I'm thinking a Roller in either caliber would make a great squirrel getter. Thanks DR
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  #2  
Old 10-12-2019, 11:26 AM
72coupe
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I would look at the energy delivered by which ever of the many 25 rimfires it is chambered for as a comparison.
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  #3  
Old 10-12-2019, 03:03 PM
wjritchie
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Comparing 25 rimfire to others as far as case dimensions it would appear the the 17 WSM built on the .27 cal nail gun blank cartridge matches the case dimensions at the rim perfectly . Looking at other builds may be the best route as far as what the action can take . Modern barrel steel may make it a real performer . Add / Edit . The # 4 replica rolling block Uberti makes is chambered up to .357 mag and there is some writings of original conversions as well . Neat project look forward to reading about it . WJR

Last edited by wjritchie; 10-12-2019 at 03:31 PM.
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  #4  
Old 10-13-2019, 10:39 AM
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Larry Potterfield has a video on converting a Remingto No. 1 from .32 rimfire to .32-20. But that is the larger No. 1 action. On the No. 4 action going from .32 RF to .32 Colt might be feasible as the Colt round has a rim, the auto calibers do not have the larger rim. I have a couple of Stevens single shot firearms that are in .32 RF that would be nice in .32-20 or Colt .32.

https://www.google.com/search?q=.32%...%20to%20.32-20
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  #5  
Old 10-19-2019, 12:36 AM
dangerranger
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[QUOTE=wjritchie;11636423]Comparing 25 rimfire to others as far as case dimensions it would appear the the 17 WSM built on the .27 cal nail gun blank cartridge matches the case dimensions at the rim perfectly . Looking at other builds may be the best route as far as what the action can take . Modern barrel steel may make it a real performer . Add / Edit . The # 4 replica rolling block Uberti makes is chambered up to .357 mag and there is some writings of original conversions as well . Neat project look forward to reading about it . WJR[

These were chambered in .22, .25, and .32. the most powerful had 233 LBS of energy. The 17 HMR with a 20 gr bullet comes in at 250 LBS. With a modern barrel I'd put my eye behind that! I think the 17 HMR is the winner! The 22 magnum comes in at 322 lbs.
The WSM is more than double the original's at over 500 lbs. I don't want to stress the hundred year old breech.

I want to put a longer barrel on it to help quiet it. Maybe 26 to 28". Then it will need a vintage scope! DR
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  #6  
Old 10-19-2019, 08:54 AM
tomon
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The caliber to do.....

Would be 25-20 Winchester. An older lower pressure caliber pushing 60-90 grain Cast bullets would work, in my opinion. YMMV!
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  #7  
Old 10-30-2019, 05:37 AM
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I think you'll be fine. I just picked up a #4 in fine untouched condition, great bore made between 1910 & 1916. Not a screw ever turned on her & what a joy to shoot. It kicks the shell about 8' over my right shoulder. What a sweetheart!
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  #8  
Old 10-30-2019, 10:45 AM
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I have a number 4 that I built as a kid gun. Did on the cheap but it turned out to be a super shooter. It has a match chamber and I foolishly shot a stinger in it. It kicked the hammer to half cock and blew the head off the case. Beside the fact that you should never shoot stingers in a match chamber, I think the business end of the firing pin is too big. I would leave it as a 22lr but if you changed the firing pin it might work out good. Keep us informed. Jake
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  #9  
Old 10-30-2019, 11:13 AM
Pete44ru
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Quote:
Originally Posted by dangerranger View Post

I found a complete action for a #4 rolling block.

Does anyone think that 22 mag or 17 HR would be too much for this action ?

I have heard that these actions could be converted to centerfire, and held up fine.

But I cant find anything that says what they can stand.

I think that a .22Mag might be OK - but only if you don't have a takedown action.

The takedown actions are weaker than the solid frame actions.

Keep in mind that the #4 is the weakest RB action, since the recoil is taken by the screws, and not the breechblock/hammer pins like the larger RB's are.

I would strongly suggest referencing the late Frank DeHaas, as he was THE expert.




.
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  #10  
Old 11-06-2019, 11:29 PM
Ol' Harry
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I have a copy of “Mr. Singleshot’s Gunsmithing Idea Book” by Frank de Hass. The copyright date of this book is 1988, (pre-.17 calibers). On page 23 de Hass lists suitable cartridges for the No. 4 as follows:
22 BB or CB
22 Short
22 Long
22 Long Rifle
22 W. R. F.
22 WMR (Solid Frame Only)
25 Short
25 Long
32 Short
32 Long

For centerfire cartridges he lists

32 Colt Short
32 Colt Long
32 S & W Short
32 S & W Long

In de Hass’s book “Single Shot Rifles and Actions, the last sentence in the chapter for the Remington No. 4 de Hass makes the statement “None of these rifles or actions are adequate in strength to be used with any of the .22, .25 or other center fire rifle cartridges.”
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  #11  
Old 11-10-2019, 12:48 PM
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Originally Posted by Jakebilt View Post
I have a number 4 that I built as a kid gun. Did on the cheap but it turned out to be a super shooter. It has a match chamber and I foolishly shot a stinger in it. It kicked the hammer to half cock and blew the head off the case. Beside the fact that you should never shoot stingers in a match chamber, I think the business end of the firing pin is too big. I would leave it as a 22lr but if you changed the firing pin it might work out good. Keep us informed. Jake
A nice classic until the can of blue paint came out...
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  #12  
Old 11-11-2019, 11:44 AM
Jakebilt

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When I got it, it was a rusty action. I added a $20.00 Numrich barrel and a Rem. 722 stock helped out with a little bondo and epoxy. This all happened about 35 years ago. It all worked out very well and now it's a classic. Also shoots good which is it's sole purpose.
Cheers, Jake
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  #13  
Old 11-11-2019, 03:35 PM
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Quote:
Originally Posted by Jakebilt View Post
When I got it, it was a rusty action. I added a $20.00 Numrich barrel and a Rem. 722 stock helped out with a little bondo and epoxy. This all happened about 35 years ago. It all worked out very well and now it's a classic. Also shoots good which is it's sole purpose.
Cheers, Jake
Nice scope anyway...

I'd have to get after the wood with paint stripper, get it back to wood, even if there are some dings. Some things I just can't abide, but I'm in my 70s and cranky.
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  #14  
Old 11-11-2019, 05:32 PM
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Ive had a couple of Remmy No.4's in 22LR and a bunch of Stevens Fav's; been in/out of the old single shots of all sizes a fair bit.
A modern steel barrel does nothing to enhance the breech strength of these Old actions and metal and it is the breech that takes the backthrust upon ignition. Pls keep in mind that a blown action next to your eye/face is not something to even be close to.
22LR at most and 'tight breech' it at rebuild and do not shoot more than std velo.
Were I doing another it would be with a 1:16 twist barrel/liner and chambered for CB Shorts.
BTW, I believe what Uberti is calling a No.4 is not the tiny No.4, it is their version of the larger and stronger No. 2 action. Might be wrong......but check the size specs against the Remmy No.2 to know.
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  #15  
Old 11-12-2019, 09:01 AM
Jakebilt

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Collector, I am also in my seventies and cranky, but I do get your point. It was built for the kids to drag around and shoot prairie dogs and has been several differnt colors. I should just do it over again with a different stock a little more carefully and get it blued. Then it would be neat. I am not short of projects but that would be a good one.
Cheers, Jake
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