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Old 03-31-2019, 12:23 PM
jxfish2

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22 WMR vs 22 MRF



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I searched for previous threads, but the only one I found seemed to convert the MRF to a WRF at some point during the thread, and never really answered the original question.

I have been searching for a .22 Magnum semi-auto pistol for quite some time.

I found several, to include the Keltec, the AMT Auto-mag, and a Grendel.

I recently found a Rock Island M1911 A1 advertised in a .22 MRF.

What in the world is a .22 MRF?

Is this similar / interchangeable with a .22 WMR?

If this new Rock Island M1911 will fire the .22 WMR, then I'm all in.

But, if it's a different round, I'm not interested!

I like the .22 WMR, and I already have a Keltec CMR-30, a NAA Ranger, and a NAA Sidewinder.

Now, to round out my collection, I want a .22 WMR semi-auto pistol.

I am looking for the "smallest", .22 WMR semi-auto, for concealed carry.

So, back to my question.

Are the .22 WMR and the .22 MRF interchangeable rounds?

The .22 WMR is manufactured up to 2200 FPS.

What is the most powerful .22 MRF variant?

Thanks in advance.

jxfish2
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  #2  
Old 03-31-2019, 03:26 PM
lscocoa
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I believe that they are the same, Winchester magnum rimfire or magnum rimfire cartridge. Got a cz 455fs, S&W m48 , and aS&W 351 . I would like to run into someone at a range to see the R.I.A 1911 in action . The 22 mag is expensive to shoot a lot but very addicting, obviously you’re addicted looking for another .
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Old 03-31-2019, 08:19 PM
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Atonic

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I think the MRF designation is seldom used, just mfg. that don't want to mention the Winchester part.
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Old 04-01-2019, 08:09 AM
Cronkytonk
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I have a RIA XT.22mag. It is .22WMR. Don't know why they refer to it as MRF. But rest assured, it is .22WMR. I love mine but if you get one, a word of warning. There is a tiny spring and plunger between barrel and barrel shroud that is not mentioned in owners manual. You WILL lose these upon disassembly if you are not careful. RIA replaced mine at no charge stating that "everyone loses them the first time they disassemble them".
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Old 04-04-2019, 01:34 PM
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flylo
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To my knowledge there's 22 wrf & 22 wmr in 22 magnum ammo.
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Old 04-04-2019, 07:52 PM
Ol` Joe
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Quote:
Originally Posted by flylo View Post
To my knowledge there's 22 wrf & 22 wmr in 22 magnum ammo.

Actually the 22 WRF is a shorter cartridge that was lengthened to produce the 22 WMR. The cartridge originated in 1890 well before any thought of the newer. 22WMR. It can be chambered and fired in a magnum chamber but, it will leave a carbon ring at the case mouth with too much use or poor cleaning habits. The ring hurts nothing, but can hinder chambering the longer 22 mag cartridge
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