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PostPosted: Sat Jan 05, 2019 4:46 pm 
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Joined: Wed Feb 07, 2018 8:10 pm
Posts: 367
Location: Winnipeg MB
A machinist in the US (Bill Holstein) has been converting .177 cartridge revolvers (mostly Umarex Colt Peacemakers) into .40 paintball airguns.

https://www.youtube.com/watch?v=njA9XHW5x9A

Contacted him if he could convert a .177 pellet Peacemaker into .22 cal pellet. He said it could be easily done but he did not have the time to do it. (Was too busy with paintball conversions)

Anyone know of a machinist or gunsmith that could do the conversion?


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PostPosted: Mon Jan 07, 2019 2:05 am 
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Location: Winnipeg, Canada
I would try one of the old Crosman ,22 single actions before going this likely expensive route- just to see if it is what's expected.

On a converted Umarex, you'd be looking at low shot counts, and low velocities. It would be a lot of work. and a .22 cal liner or bbl would have to be sourced. The Umarex's are already a bit on the low velocity side to begin with in .177.

I think the Remington 1875 would be a bit of a more likely candidate for something like this, just because it's quite a bit cheaper.

-D.S.

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PostPosted: Mon Jan 07, 2019 11:49 am 
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Joined: Wed Feb 07, 2018 8:10 pm
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Location: Winnipeg MB
I have a .22 cal Crosman Single Action 6 pellet revolver (Peacemaker style pistol). Love it, but try not to use it much, as it is close to 60 years old. I have already has it refurbished once, right after I got it (from Mr. Marvin).

Nice pistol, nice accuracy, but like the style of the new shell loading revolvers better.

Someone is converting to paintball, and he said conversion to .22 pellet should be easier.

And yes, I would assume velocity & shot count would drop on conversion to .22, but the SA6 only get about 30-36 shots from a CO2 cartridge, and sub 300 fps.


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PostPosted: Mon Jan 07, 2019 2:00 pm 
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Location: The Pas Manitoba
All the cartridge type revolvers are pretty weak.
My Remington 1875 doesn't even have the power to push the pellets ive tried through the gasket on the cartridges, only works with BBs and only shoots those at around 350 fps.
Also they rely on a springloaded forcing cone to get gas pressure high enough to shoot with any power.
I imagine a conversion on these revolvers would be extremely difficult as youd need to rebuild the sealed forcing cone and convert the gas system to allow waaaay more gas.

_________________
Rifles- Diana D24 .22 - Xisico B25 .22 - Slavia 631 .177 - Snowpeak B5-1 .22 (AK folder) - Crosman 2200 .22
Pistols- Diana Chaser .22 - Sheridan E9A .20 - Walther Sport .177 - Beretta M84 BB - Remington 1875 .177
And more powderburners than is reasonable.


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PostPosted: Mon Jan 07, 2019 9:39 pm 
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Location: Winnipeg MB
Might be a flaw with your 1875. I have one, and many other shell loading revolvers, all work well, no complains. Lots of power (for a CO2 pistol)

Crosman has a one year warranty. Maybe call Crosman for assistance.


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PostPosted: Tue Jan 08, 2019 5:46 am 
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Location: QC
Doc Sharptail wrote:
this likely expensive route


For the caliber conversion I don't think it would be complex beyond boring out the cartridges and machining a .22 barrel to match the exterior profile of the existing one. Even without modifying the valve system you should get considerably more energy out of it.


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PostPosted: Tue Jan 08, 2019 2:13 pm 
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Location: The Pas Manitoba
BB1Shooter wrote:
Might be a flaw with your 1875. I have one, and many other shell loading revolvers, all work well, no complains. Lots of power (for a CO2 pistol)

Crosman has a one year warranty. Maybe call Crosman for assistance.


After doing some research many others have the same problem as me with shooting pellets. I'm going to try lubricating the seals at the back of the cartridges as some have reported this helped pellets feed through them.

_________________
Rifles- Diana D24 .22 - Xisico B25 .22 - Slavia 631 .177 - Snowpeak B5-1 .22 (AK folder) - Crosman 2200 .22
Pistols- Diana Chaser .22 - Sheridan E9A .20 - Walther Sport .177 - Beretta M84 BB - Remington 1875 .177
And more powderburners than is reasonable.


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PostPosted: Tue Jan 08, 2019 7:48 pm 
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Location: Winnipeg MB
A call to Crosman customer service, might not be a bad idea. They have always been helpful to me.


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PostPosted: Thu Jan 10, 2019 4:12 am 
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Location: Winnipeg, Canada
Finally got time to dig out a Umarex .177 SAA cartridge.
Pulled the composite rubber pellet seat, and there won't be much beef left there after boring out to even .219".
I would try going as small as .217" I.D. seat , and see how a .22 skirt would react to that.
If not, the pocket for the pellet seat would have to be bored out, and new seat material sourced.

As for costs, lathe time is likely going to run about a minimum of 50 bucks an hour.
Don't know what is being charged for tear down and rebuilding time these days. My old reliable gunsmith was charging 40 dollars an hour, and that is going back a fair piece. Factor in the 200 or so cost of a Umarex SAA, and things start to escalate a bit rapidly ...

I suppose it could be done. Not sure I'd want to get that far into something that will end up a bit low on performance.
I have yet to examine the Umarex CO-2 path in detail. Perhaps there's enough there that it could withstand a little "porting out", perhaps not.

Funny thing is, I may have some candidate soda straw .22 Crosman bbl here left over from previous projects. Might not be that much of an effort to get a section to fit, but I won't be starting anywhere near soon...

-D.S.

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"Ain't no half-way"
-S.R.V.

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PostPosted: Sun Jan 20, 2019 2:40 pm 
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Joined: Fri Jul 03, 2009 10:13 pm
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Location: Annapolis Valley, Nova Scotia
I think it very possible to do, I had converted one of my 357 to 22 cal pellet, and have put rifled barrel in my crosman SNR, I think is a similar style setup to yours. I did very slightly port the valve in the SNR but still only get 350-360 fps with the crosman 7grn pellets but my SNR has a very short barrel and cant really take advantage of extra co2. I would guess that with a 7 inch barrel and some mods you could push close to 400fps in 22 cal, maybe not, but I have thought of gettin one of those pistols just to try n mod it to 22 cal pellet myself.

-Matt


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PostPosted: Sun Jan 20, 2019 5:42 pm 
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Joined: Wed Feb 07, 2018 8:10 pm
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Location: Winnipeg MB
Would be interested in hearing how you make out, if you decide to convert one. I suspect a longer barrel version Peacemaker (7.5 inch) would work the best.


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