Can I re chamber my cooey 75???

[N1SH1E]

As the title states I was just wondering if it would be possible/ safe to get a cooey 75 (single shot, bolt action) re chambered to a .22wmr. I would of course have all work done professionally either by a gunsmith or a machinist with the appropriate expertise. I figured that because the case dimensions are essentially the same aside from length it would just be a matter of getting the chamber lengthened and tweaking everything else slightly so that it all runs smoothly. My main concern is of course safety, would the bolt/ barrel handle the extra pressure or would a be turning the gun into a pipe bomb? Also if the throw on the bolt long enough to extract the longer case or would I get stuck having to remove the bolt to load/ eject. Just a thought I had and still being a noob to the firearm scene I figured I'd seek the wisdom of the larger community before I went any further with the idea
Cheers

 

[tiriaq]

I wouldn't.

 

[Barry F]

I would keep the Model 75 as is and BUY a .22 magnum.

 

[kamlooky]

The cost would prohibit the change.
It's not hurtful to own a couple a rimfires ya know.
Variety is a good thing.

 

[buffdog]

.
This is a topic that appears regularly. Basically, you should not think about it. The .22 Long Rifle barrels are made to a slightly smaller diameter than the .22 WMR barrels. The .22 WMR bullets are larger diameter than the .22 LR so barrel pressures are higher. Also, there is a bit more chamber pressure when fired.

Economically, it would probably cost less to buy a used, or even new 22 WMR rifle that is designed and specifically made for the .22 WMR cartridge. Also, newer rifles generally have the receivers drilled and tapped for scope mounts and bases, along with good safeties and even magazines. For about $200, you could probably buy a Savage Mark II or a Marlin and get a much more suitable rifle.

Realistically, it is false economy to attempt a conversion of this sort and they do not really work out satisfactory.
.

 

[camster]

Add to the above, the only locking "lug" on a Cooey 75 is the bolt handle. It's only brazed on.

 

[N1SH1E]

Good to know, thank you all for your advice.

 

[.22LRGUY]

I would not bother with this, for the reasons stated already. .22WMR isn't an exotic rifle to find used OR new, and even used...there is lots of variety. .22WMR is a pile of fun though, love mine. (Savage 93FV)