22lr reaming to 22wmr

Craig0ry

Craig0ry

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EDIT, New Route, Post #7

Alright guys, hear me out. Been in the market for a cz512 in 22wmr. I know they have been discontinued. And the unobtanium +1k used price tags on 22wmr throws me off a bit.

My local shop has a 512in 22lr on the used rack for a good price. my question is.

do you think I could have the barrel reamed to 22 magnum?

The action length is the same on both rifles I'm pretty sure, you can see the spacer on the 22lr that can be taken out to accept larger mags, just like on their bolt action rifles.

my concerns would be different twist rates and also different action spring of course, springs could be an easy fix it was an issue.

Am I out to lunch for considering doing this? thoughts and input are greatly appreciated.
 
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Dave_D said:
Bores are different size. Wich will increase pressure as well (on top of the higher pressure 22mag) There’s a few other things to look out for too.
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bore diameter was another concern i forgot to put in there, that pretty well settles it right there! thank you! it's a shame they didn't make the 455/457 barrels interchangeable with the 512, would have opened up a world of options.
 
Realistically a .001" difference in bore diameter is nearly irrelevant unless you are going the other way. Split cases are common as is piss poor accuracy when using undersized cartridges and bullets. Going the other way can be a net benefit depending on a lot of things. I would just buy the gun you are trying to make but whatever.

.22lr and WMR have same pressure rating BTW. Common misconception. That difference in surface area can matter but almost certainly won't.
 
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B said:
Realistically a .001" difference in bore diameter is nearly irrelevant unless you are going the other way. Split cases are common as is piss poor accuracy when using undersized cartridges and bullets. Going the other way can be a net benefit depending on a lot of things. I would just buy the gun you are trying to make but whatever.

.22lr and WMR have same pressure rating BTW. Common misconception. That difference in surface area can matter but almost certainly won't.
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If one came around for a decent deal I would consider it, Two just sold on here on Monday for $1050, If I were to try my route I would be saving $450 if it worked out.
 
I have a 512 in the "tactical " model, I will vouch for how much fun it is and yes hard to find. Would you be able to find one stateside and import through Prophet River or Irunguns?
 
Dave_D said:
Bores are different size. Wich will increase pressure as well (on top of the higher pressure 22mag) There’s a few other things to look out for too.
Click to expand...
Well, if you look it up Both .22LR & Magnum are around 24,000 PSI - Yes, Magnum = higher velocity, but 'pressures' are commonly pretty close.

Also, as per mentioned above the difference with the bore diameter on Rugers is .222 on a 'just' .22 & .224 if it's a convertible.

As per the cheap Ruger Wranglers we got here..they also use a .224 bore. They don't advertise, as it's cheaper then the Convertible ones..but I know of a couple instances of 'reamed' out cylinders etc. & the Wrangler is fully capable to shoot .22WMR.

The thing to have known is, if CZ used a .222 or a .224 barrel? {or .223} Do you think the .001 or .002 would make a difference if you reamed the chamber to fit the .22 Magnum?
I know lots of reloaders/bullet casters who use bullets .001/.003 over.
 
Johnyy said:
Well, if you look it up Both .22LR & Magnum are around 24,000 PSI - Yes, Magnum = higher velocity, but 'pressures' are commonly pretty close.

Also, as per mentioned above the difference with the bore diameter on Rugers is .222 on a 'just' .22 & .224 if it's a convertible.

As per the cheap Ruger Wranglers we got here..they also use a .224 bore. They don't advertise, as it's cheaper then the Convertible ones..but I know of a couple instances of 'reamed' out cylinders etc. & the Wrangler is fully capable to shoot .22WMR.

The thing to have known is, if CZ used a .222 or a .224 barrel? {or .223} Do you think the .001 or .002 would make a difference if you reamed the chamber to fit the .22 Magnum?
I know lots of reloaders/bullet casters who use bullets .001/.003 over.
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I’m just implying that a tighter bore would result in increased pressure.
I said nothing about the round itself did I ?
 
Dave_D said:
I’m just implying that a tighter bore would result in increased pressure.
I said nothing about the round itself did I ?
Click to expand...

Seems to me you did? What else do you possibly mean by "on top of the higher pressure 22mag"?

Dave_D said:
Bores are different size. Wich will increase pressure as well (on top of the higher pressure 22mag) There’s a few other things to look out for too.
Click to expand...
 
Johnyy said:
Also, as per mentioned above the difference with the bore diameter on Rugers is .222 on a 'just' .22 & .224 if it's a convertible.

As per the cheap Ruger Wranglers we got here..they also use a .224 bore. They don't advertise, as it's cheaper then the Convertible ones..but I know of a couple instances of 'reamed' out cylinders etc. & the Wrangler is fully capable to shoot .22WMR.
Click to expand...

Interesting. I wonder why they say you can't use a Super Wrangler cylinder in an old wrangler then... That would be a real nice addition to my Wrangler if its only lawyer talk and not actually incompatible...
 
Evanguy said:
The bolt face may have to be opened up, I'm not sure if that rifle uses a recessed face or not. If I as doing it to my rifle I'd use a 1/4 reamer or make a D bit to cut the chamber..it's basically straight with 0.002" taper
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I've interchanged my cz455 bolt from 22lr to 17hmr, I don't recall any issues, I'll take a look tonight when I get home.
after diving into the rabbit hole last night of rifles that had been reamed from 22lr to 22wmr I've come to the conclusion I'm not very worried about the .001-.002 bore difference, willing to take the gamble.
Just need to find a Smith with a 22wmr reamer
 
the problems will be feeding extraction opening up the bolt the firing pin will not be in a perfect position to hit the rim nor will the extractor be in the proper place
getting a qualified smith to do the work 200-300$
just buy a real one
 
Yeah I'm not sure what the bolt faces look like on those rifles, but he rim on the 22lr is 0.278" and the 22mag is 0.300" so if the bolt face is recessed like lots of them are I ont think the 22 mag will fit in it, the extractor may also have to be worked
 
struff55 said:
the problems will be feeding extraction opening up the bolt the firing pin will not be in a perfect position to hit the rim nor will the extractor be in the proper place
getting a qualified smith to do the work 200-300$
just buy a real one
Click to expand...
they don't make a 16.5" scout barrel in 22wmr
 
Evanguy said:
Yeah I'm not sure what the bolt faces look like on those rifles, but he rim on the 22lr is 0.278" and the 22mag is 0.300" so if the bolt face is recessed like lots of them are I ont think the 22 mag will fit in it, the extractor may also have to be worked
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being they sell minisets in the different calibers I'm assuming people are constantly changing calibers on their 455/457's I havnt seen anyone posting any issues about it.
 
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