22LR to 22WMR?

redrider · August 6, 2002, 10:04 AM

I have a Stevens 22/410, is it possible to have the 22 LR reamed out to a mag? Would it not be cost effective? I don't know anything about rechambering/reaming so maybe I'm way off base and don't know it. Some enlightenment is in order. Thanks for your help.

Jim V · August 6, 2002, 10:35 AM

Besides having the chamber opened up you would need to have the bore opened up, IIRC, the .22 WMR uses a larger bore diameter than the .22LR.

redrider · August 6, 2002, 10:36 AM

Aren't they both .224 ?

stubby · August 6, 2002, 12:39 PM

The two cartridges may have different bore specifications but both are fired from the same barrels. For example the ruger handguns with interchangable cylinders for 22 rimfire and 22 magnum rimfire. The specifications must be very close if they are different at all.

johnwill · August 6, 2002, 01:20 PM

.22LR is .223 dia, and .22Mag is .224 dia.

dfaugh · August 6, 2002, 03:44 PM

that .22lr was .219...WMR was .224...Gun mag article on rimfires, but I might be wrong..Still, as pointed out, probably OK

Jim V · August 6, 2002, 08:57 PM

.22 mag barrels are used with the convertable revolvers.

Ledbetter · August 6, 2002, 09:02 PM

Cases are much longer, so, as I understand it, your chamber would have to be lengthened to accomodate the longer cartridge, so that the bullet would engage the rifling properly.

Also, since the barrel diameters are .001" or more different, the best alternative might be to have a nice barrel from a well-known maker chambered, installed and headspaced for .22 WMR.

I think the idea of a .410/.22 WMR is a good one. Good luck.

Regards.

C.R.Sam · August 6, 2002, 11:56 PM

The tolerances for the barrels are such that a barrel that is within manufacrurer's specs may well be just right for the other cartridge. Good idea to get your barrel checked for size first.

Rate of twist would also be a factor.

Sam

redrider · August 7, 2002, 01:46 AM

I'm not sure if the barrels can be seperated easily. They appear to be joined together. The gun is a single shot, break open model. I know the mag is longer and I thought that would be the only difference, that is why I ask you guys, cause I aint as smart as I thunk I r, I reckon.

Ledbetter · August 7, 2002, 01:23 PM

If so, all you may need is a chamber lengthening. (Edit: I should have said reaming; see below.) A guy who should be able and willing to help you out with advice and excellent work is Randy at

http://www.ct-precision.com/

1-860-343-0552
9 a.m. to 10 p.m. (wait 8-9 rings)

references available at

www.rimfirecentral.com

He may be able to rechamber one barrel without separating them. Again, good luck.

Jim V · August 7, 2002, 08:16 PM

The chamber will have to be opened up too. Different diameter shell casings. The 22 WRM uses a conventional bullet while the .22 LR uses a heeled bullet that is the same diameter as the case.

C.R.Sam · August 8, 2002, 02:48 AM

Jim right. Barrel might be fine but chamber will have to be reamed for the fatter and longer cartridge.

Sam

August 6, 2002, 10:04 AM	#1
redrider Member Join Date: June 18, 2002 Location: seattle, washington Posts: 67	22LR to 22WMR? I have a Stevens 22/410, is it possible to have the 22 LR reamed out to a mag? Would it not be cost effective? I don't know anything about rechambering/reaming so maybe I'm way off base and don't know it. Some enlightenment is in order. Thanks for your help. __________________ Wanted: good women with nice truck, smart dog and large critter ranch. Please send photo of truck, dog and ranch.

August 6, 2002, 10:35 AM	#2
Jim V Senior Member Join Date: January 31, 1999 Location: SE Michigan - USA Posts: 4,038	Besides having the chamber opened up you would need to have the bore opened up, IIRC, the .22 WMR uses a larger bore diameter than the .22LR. __________________ *MOLON LABE* If it ain't metal, single stack & single action, it ain't a 1911 no matter what it looks like. 1911 Forum THE TUBBY CURMUDGEON

August 6, 2002, 10:36 AM	#3
redrider Member Join Date: June 18, 2002 Location: seattle, washington Posts: 67	Aren't they both .224 ? __________________ Wanted: good women with nice truck, smart dog and large critter ranch. Please send photo of truck, dog and ranch.

August 6, 2002, 01:20 PM	#5
johnwill Senior Member Join Date: April 6, 2000 Location: PA Posts: 3,451	.22LR is .223 dia, and .22Mag is .224 dia. __________________ I collect old pistols, got any?

August 6, 2002, 03:44 PM	#6
dfaugh Senior Member Join Date: January 17, 2002 Location: Upstate NY Posts: 1,715	Thought I read somewhere that .22lr was .219...WMR was .224...Gun mag article on rimfires, but I might be wrong..Still, as pointed out, probably OK __________________ "If you Listen to Fools, the Mob Rules" "No one has the answer, but one thing is true. You'e got to turn on evil, when its coming after you. You've gotta face it down,and when it tries to hide, you've got to go in after it, and never be denied. Time is running out...Let's roll. Let's roll for freedom, let's roll for love. We're going after satan, on the wings of a dove. Let's roll for freedom, let's roll for truth. Let's not let our children grow up fearful in their youth."

August 6, 2002, 12:39 PM	#4
stubby Senior Member Join Date: May 1, 1999 Posts: 159	The two cartridges may have different bore specifications but both are fired from the same barrels. For example the ruger handguns with interchangable cylinders for 22 rimfire and 22 magnum rimfire. The specifications must be very close if they are different at all.

August 6, 2002, 08:57 PM	#7
Jim V Senior Member Join Date: January 31, 1999 Location: SE Michigan - USA Posts: 4,038	.22 mag barrels are used with the convertable revolvers. __________________ *MOLON LABE* If it ain't metal, single stack & single action, it ain't a 1911 no matter what it looks like. 1911 Forum THE TUBBY CURMUDGEON

August 6, 2002, 09:02 PM	#8
Ledbetter Senior Member Join Date: February 23, 2000 Location: California USA Posts: 4,533	Good idea for a lot more punch Cases are much longer, so, as I understand it, your chamber would have to be lengthened to accomodate the longer cartridge, so that the bullet would engage the rifling properly. Also, since the barrel diameters are .001" or more different, the best alternative might be to have a nice barrel from a well-known maker chambered, installed and headspaced for .22 WMR. I think the idea of a .410/.22 WMR is a good one. Good luck. Regards.

August 6, 2002, 11:56 PM	#9
C.R.Sam Senior Member Join Date: October 29, 1999 Location: Dewey, AZ Posts: 12,858	The tolerances for the barrels are such that a barrel that is within manufacrurer's specs may well be just right for the other cartridge. Good idea to get your barrel checked for size first. Rate of twist would also be a factor. Sam

August 7, 2002, 01:46 AM	#10
redrider Member Join Date: June 18, 2002 Location: seattle, washington Posts: 67	I'm not sure if the barrels can be seperated easily. They appear to be joined together. The gun is a single shot, break open model. I know the mag is longer and I thought that would be the only difference, that is why I ask you guys, cause I aint as smart as I thunk I r, I reckon. __________________ Wanted: good women with nice truck, smart dog and large critter ranch. Please send photo of truck, dog and ranch.

August 7, 2002, 01:23 PM	#11
Ledbetter Senior Member Join Date: February 23, 2000 Location: California USA Posts: 4,533	Sam is usually right If so, all you may need is a chamber lengthening. (Edit: I should have said reaming; see below.) A guy who should be able and willing to help you out with advice and excellent work is Randy at http://www.ct-precision.com/ 1-860-343-0552 9 a.m. to 10 p.m. (wait 8-9 rings) references available at www.rimfirecentral.com He may be able to rechamber one barrel without separating them. Again, good luck. Last edited by Ledbetter; August 8, 2002 at 12:43 PM.

August 7, 2002, 08:16 PM	#12
Jim V Senior Member Join Date: January 31, 1999 Location: SE Michigan - USA Posts: 4,038	The chamber will have to be opened up too. Different diameter shell casings. The 22 WRM uses a conventional bullet while the .22 LR uses a heeled bullet that is the same diameter as the case. __________________ *MOLON LABE* If it ain't metal, single stack & single action, it ain't a 1911 no matter what it looks like. 1911 Forum THE TUBBY CURMUDGEON

August 8, 2002, 02:48 AM	#13
C.R.Sam Senior Member Join Date: October 29, 1999 Location: Dewey, AZ Posts: 12,858	Jim right. Barrel might be fine but chamber will have to be reamed for the fatter and longer cartridge. Sam

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