10/22 mag converted to .25 acp

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camerl2009

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so ive been looking at making a neat little carbine in .25acp witch is ok for rifles just not for pistols

ive seen a few .22 mag bolt rifles converted to .25 acp why not a semi :D

i know the mags would need to be pined and the like

if you look at saami specs the .22 mag and the .25 acp have the same rim diameter so nothing needs to be done to the bolt other then coverting it to center fire

the reason for this is to make a rifle that can hunt bigger furbering game with out much damage to the fur and kill them faster

if thay can get 890 fps out of a 4" or shorter barrel how much do you think i could get out of 20" barrel :eek: and a .25 acp 10/22 is not something you see every day :)
 
camerl2009 said:
if thay can get 890 fps out of a 4" or shorter barrel how much do you think i could get out of 20" barrel :eek: and a .25 acp 10/22 is not something you see every day :)
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You'd be surprised. There is actually very little difference in velocity (if any) between a 16'' and a 20'' .22 rimfire barrel. In fact, going up to 24'' has been shown to actually slow down the bullet due to internal resistance after all the powder has been burnt before the bullet exits the barrel.

Contrary to what the women say, sometime's longer isn't always better.
 
camerl2009 said:
.....and a .25 acp 10/22 is not something you see every day.....
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That is the only justification for a project like this. Doing it for the sake of doing it.

10/22 Magnum: $300? if you can find one.
.250 barrel liner: $140?
Piloted drill and chambering reamer: $150?
Assume that no 'smithing has to be farmed out. Paying someone $50 an hour to tinker would drive the cost up.

First thing to do would be to get a 10/22 Magnum magazine, a box of .25 cartridges, and see if the magazine would work, or could be adapted. If the magazine isn't going to work, the project would be a waste of time.

.22 magnum ammunition is available as FMJ. Fresh Winchester .22WRF ammunition is also available, if reduced velocity loads are desired.
 
really all im going to do on this is this idea would ever become a project

is have a .250 barrel(with the right twist) turned to match a 10/22 mag barrel

this is one of my carzy ideas i come up with in the middle of the night

the longer barrel should just the fps to 1400 or so with a 35gr hollow point
 
"...other than coverting it to center fire..." Easier said than done.
The .22 Magnum's case is 36 thou smaller in case diameter than a .25 ACP. 440 thou longer. The .25 won't fit in the mag.
"...have the same rim diameter..." Nope. Magnum's is .294". ACP's is .309".
 
sunray said:
"...other than coverting it to center fire..." Easier said than done.
The .22 Magnum's case is 36 thou smaller in case diameter than a .25 ACP. 440 thou longer. The .25 won't fit in the mag.
"...have the same rim diameter..." Nope. Magnum's is .294". ACP's is .309".
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you do know the bolt on any rimfire is cut over size to make room when the rim gets hit by the firing pin

i bet i could make it work :)
 
A .25ACP does not use the same bore as any other .25 cartridge. .25ACP bullets are about .251", everything else is .257". I would be surprised if a .25ACP suitable rifle barrel is available; a liner is.
.22 Magnum is not a particularly good choice for an autoloader, with its long, slender, thin case. Ruger discontinued the .22 Magnum 10/22 for reason. The H&R semi auto Magnum failed. The ACP on the other hand was designed expressly for an autoloading action.
The magazine is critical in any auto design. If a Ruger magzine can't be adapted, the rifle isn't going to work. At least Ruger magazines can be disassembled, so the rotor and feed lips can be worked on. That's why starting with a magazine and some rounds would be a good idea.
 
tiriaq said:
A .25ACP does not use the same bore as any other .25 cartridge. .25ACP bullets are about .251", everything else is .257". I would be surprised if a .25ACP suitable rifle barrel is available; a liner is.
.22 Magnum is not a particularly good choice for an autoloader, with its long, slender, thin case. Ruger discontinued the .22 Magnum 10/22 for reason. The H&R semi auto Magnum failed. The ACP on the other hand was designed expressly for an autoloading action.
The magazine is critical in any auto design. If a Ruger magzine can't be adapted, the rifle isn't going to work. At least Ruger magazines can be disassembled, so the rotor and feed lips can be worked on. That's why starting with a magazine and some rounds would be a good idea.
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yea i know i'll have to get some brass,bullets and a mag i think i got .25 acp dies some where :)

i can have a barrel cut with the rifling i need and turned at the same time

im not even going to use a 10/22 thats ready to shoot im buying a 80% mag reciver kit witch comes with the bolt,ect the thing i find odd is thay will ship the 80% reciver across the border no problem :eek:
 
tiriaq said:
That is the only justification for a project like this. Doing it for the sake of doing it.

10/22 Magnum: $300? if you can find one.
.250 barrel liner: $140?
Piloted drill and chambering reamer: $150?
Assume that no 'smithing has to be farmed out. Paying someone $50 an hour to tinker would drive the cost up.

First thing to do would be to get a 10/22 Magnum magazine, a box of .25 cartridges, and see if the magazine would work, or could be adapted. If the magazine isn't going to work, the project would be a waste of time.

.22 magnum ammunition is available as FMJ. Fresh Winchester .22WRF ammunition is also available, if reduced velocity loads are desired.
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The cost of a 10/22 magnum is closer to $700 as they're so rare.
 
The seller probably is of the opinion that an 80% receiver isn't a gun part. Whether US DOS agrees, I don't know. The 80% business doesn't exist in Canada, so be prepared for CBSA to treat it as a firearm. You have a Cdn. barrel mfr. who will make a one-off .25ACP rifle barrel for a reasonable price? If in the US, be prepared for the whole export of a controlled item situation.
 
tiriaq said:
The seller probably is of the opinion that an 80% receiver isn't a gun part. Whether US DOS agrees, I don't know. The 80% business doesn't exist in Canada, so be prepared for CBSA to treat it as a firearm. You have a Cdn. barrel mfr. who will make a one-off .25ACP rifle barrel for a reasonable price? If in the US, be prepared for the whole export of a controlled item situation.
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canada dose follow the 80% rule you can buy them here with no paper work mainly ar's ive never seen some one selling 10/22 recivers of that type here

Adams Lake Rifle Barrels should be able to do the job for me on the barrel
 
Or....machine a sub=caliber cartridge adapter.
Marble's used to make one for the .25 ACP/250-3000.

Lots of excellent drawings and history.
http://www.retro.co.za/gundex/articles/Auxiliary Cartridges.pdf

Personally, I fail to see any real advantage with the .25 ACP over the .22 Magnum.:confused:

My Mossberg 640KA Chuckster, needs no improvement out to a hundred yards.

I suppose that a person with nothing better to do with their time and resources/money, might find some interest in this project.:yingyang:

If I should wake-up in the middle of the night with such a thought dancing in my head.
I would put it out of my head as nothing but a bad dream Eh!:p:D
 
Halger280HVMag said:
Or....machine a sub=caliber cartridge adapter.
Marble's used to make one for the .25 ACP/250-3000.

Lots of excellent drawings and history.
http://www.retro.co.za/gundex/articles/Auxiliary Cartridges.pdf

Personally, I fail to see any real advantage with the .25 ACP over the .22 Magnum.:confused:

My Mossberg 640KA Chuckster, needs no improvement out to a hundred yards.

I suppose that a person with nothing better to do with their time and resources/money, might find some interest in this project.:yingyang:

If I should wake-up in the middle of the night with such a thought dancing in my head.
I would put it out of my head as nothing but a bad dream Eh!:p:D
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i like things that no one else has i did make a adapter for my martini henry with a rifled liner in .25 acp but i have not used it yet (chose the .25 acp becuse it only needs about 2 inch barrel to work right)

i knid of like the little .25 acp its a neat little cartridge

and a semi auto in .25 acp would be a cool little scout "carbine"
 
camerl2009 said:
canada dose follow the 80% rule you can buy them here with no paper work mainly ar's ive never seen some one selling 10/22 recivers of that type here.....
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Have you ever seen anything official from the RCMP/CFP recognizing this? You would be dealing with CBSA. Do you have any information about their position on unfinished receivers?

Adams Lake carries Kreiger and PacNor barrels. Both these makers offer high quality barrels, including ones in .25 caliber. .257 groove. Apart from the fact that these barrels cost several hundred dollars, a .25ACP bullet will just about drop through without engaging.
You can just ask Obtunded here on the forum about supplying a .25ACP rifle barrel.
 
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camerl2009 said:
.17 mach2 is a necked down .22lr
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I know. And the stroke length is much closer to the acp than the 22mag is. You start with any old 10/22 and add the weighted bolt, which better deals with the highter pressure of the Mach2. Opening the bolt face, when compared to the other obsticles of this project isnt a big deal.
 
How do you make rimfire firing pin work on center fire? I haven't looked so just sayin. With all the work going into it already, I guess it's just one more obstacle.
 
Marlin M1892 was made in .32RF/.32CF combination. The firing pin ran in a slot along the top of the bolt, not unlike the Ruger. Slot was deep enough that the striker tip of one firing pin could strike the centerfire primer; the other struck the rimfire. This might be a workable solution. This project would be in the category of doing it for the sake of doing it. Lots of work and experimentation and expense for little practical gain. Who knows? Might be do-able, might not.
 
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