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Author Topic: Charter Arms Pathfinder .22LR to .22mag?  (Read 2560 times)

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Offline reno2507

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Charter Arms Pathfinder .22LR to .22mag?
« on: October 29, 2009, 08:11:33 AM »
I have an old style stainless pathfinder in .22LR (3"brl). I just bought a blued .22lr cylinder from gunbroker, and am wondering what all is involved to modify the blued cylinder for magnum, besides reaming the cylinder. Charter used to offer additional cylinders in magnum, but you had to send in the gun to have it "fitted". Does the forcing cone have to be reamed as well? Does anyone know what all is involved? Thanks guys.
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Offline mjbgalt

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Re: Charter Arms Pathfinder .22LR to .22mag?
« Reply #1 on: October 29, 2009, 01:09:31 PM »
the barrels of a .22lr are .223" (i believe- may be .222") and the barrels of WMR's are .224" like the big boy .22's.

you could shoot them through the .22lr, but you may have pressure issues, head space issues, and leading like crazy.

usually the guns that can shoot either cartridge, are larger to fit the magnum and the .22lr suffers in the accuracy dept.
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Offline Bigeasy

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Re: Charter Arms Pathfinder .22LR to .22mag?
« Reply #2 on: October 29, 2009, 01:19:44 PM »
I would wonder if the heat treating on the spare cyln. is the same as the .22 mag. version.

Larry
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Offline trotterlg

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Re: Charter Arms Pathfinder .22LR to .22mag?
« Reply #3 on: October 29, 2009, 05:17:56 PM »
The SAAMI pressure for both the long rifle and 22 Mag is 24,000psi.  You won't have as much leading with the 22 Mag (you will have none at all)  because most use copper jacketed bullets.  Larry
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Offline mjbgalt

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Re: Charter Arms Pathfinder .22LR to .22mag?
« Reply #4 on: October 29, 2009, 05:26:58 PM »
true, i should have said fouling.

it definitely is going to have a serious copper issue.
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Offline gunnut69

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Re: Charter Arms Pathfinder .22LR to .22mag?
« Reply #5 on: October 31, 2009, 12:05:31 PM »
If I remember correctly the Pathfinder was made in 22Mag so the sylinder could likely be made to fit.. Fitting involves installing the cylinder and adjusting the timing of the chambers to the barrel.. It is possible (likely) the throat would need resetting..but maybe not.. I'd probably install it on a spare yoke and see if I could make the gun a swap caliber.. Pressures will likely be a bit higher than normal in the tight bore but I doubt the revolver will notice.. With that short little barrel you certainly will...
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Offline reno2507

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Re: Charter Arms Pathfinder .22LR to .22mag?
« Reply #6 on: October 31, 2009, 06:38:05 PM »
I greatly appreciate all the feedback, and welcome any more. Thanks
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Offline Rangr44

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Re: Charter Arms Pathfinder .22LR to .22mag?
« Reply #7 on: November 01, 2009, 11:59:14 AM »
I own two Charter Pathfinder revolvers.

One is an older/blued 3" .22 Mag-only.



The other is a new stainless 4" Target Pathfinder Dual Cylinder .22LR/.22Mag.



The LR cylinder ( which is the primary cylinder that the barrel is marked for) is slightly more accurate in my dual-cylinder gun - see the left target, above.

The older .22 Mag is slightly more accurate than the newer stainless gun, in either caliber - but that may be a result of the newer gun's sights color being the same color as the rest of the gun, and being lost during firing/aiming.

The two different generation revolver's cylinders, AND the amount that the barrel throat protrudes through the frame into the cylinder opening, is vastly different - and the .22 mag cylinders are NOT interchangeable between the revolvers.
The newer/stainless cylinders are much longer than the earlier gun's, and ergo, it's barrel barely pokesw through the front of the cylinder frame; while the older gun's barrel extends over 1/4" into the cylinder window, with that cylinder accordingly shorter.
The rear faces/edges of the different model's cylinders are machined differently, also.
Interesting.

.
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