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Thread: 7.62x 25 / CF-W / Max11sk

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    7.62x 25 / CF-W / Max11sk

    I used to run 7.62 x 25 in my max-11. I was thinking about whether I could run this conversion with a max11sk & CF-W bolt configuration. Does anyone know if the max-11 & max-11sk barrels are interchangeable? They seem to be have the same inside length by eyeballing them.

    Would this beat the piss out of my receiver? The max-11 seemed to handle it just fine. I still have a ton of 7.62 x 25 from when it was $80 a case.

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    If I was you
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    If you don't mind me asking, what did you use for mags as the 7.62x25 is long as .45? I too have multiple cases of the cheap corrosive surplus but I use it in a direct impingement AR upper with modified PPS-43 mags. I would think if the CF(W) bolt was modified to take the Lage steel weight in a standard Max-11 upper would give a decent ROF. That 7.62x25 ammo is pretty hot.

    Scott

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    Modified Sten mags.

    I think they were commercially made for the Wiselite Colefire? They're not terribly hard to make.

    https://www.apexgunparts.com/colefir...d-7-62x25.html

    There's a bunch of posts about it around here somewhere from back in the day.
    Last edited by greenpeas; 07-27-2020 at 01:17 PM.
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    Greenpeas,

    I had a ton of that ammo too, bought it to use in the AA Upper that never came out in 7.62x25. Earlier this year I sold my 25 cans of it for $300 plus shipping which works out to about $12/50 rounds. You can get 9mm for half that (pre-pandemic, not sure what it runs now). You might consider to sell it and then buy twice as much 9mm and for less hassle than the longer, hotter, noisier cartridge.

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    I would suggest running it in a 31 or 31a as that would give you maximum stroke. There was a thread on the TCM .22 9R ammo and IIRC the problem was hitting the back of the receiver. Barrels should interchange no problem.

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    I do not have a SK, but I would bet the barrels are the same. It just makes logistical sense. I was going to try 7.62x25 with the CF-W bolt, but I cant find my barrel!
    Chris Hipes
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    I had a barrel made for the MAX 31K and 22 TCM 9R ammo. It was still very hard on the brass and the lighter 31K bolt hit the back of the receiver. I had 2 case failures so I quit testing. I think it could work better with the CFW-A bolt. I wish I had a W bolt at the time to test.
    http://www.uzitalk.com/forums/showth...rell-for-a-MAC




    Last edited by strobro32; 07-27-2020 at 04:38 PM.

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    The barrels on the internal side are the same. I got a mk2 barrel from lage for my sk upper so I could have it cut down and 3 lugged correctly. The stock barrel wasn't long enough and I wanted the rifling to go to the end vs a normal threaded on 3 lug adapter. Running a navy style 3 lug over the barrel just looks so much cleaner.

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    If you reload you can get the x25 subsonic and reliable with 100 or 110 grn bullets.

    Ii have a few of the modded sten mags and a chamber reamer just need a barrel blank and time to turn one out for the max 10/31
    Or the m10 oem upper.

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    Not sure the best way to tell if the bolt is hitting the receiver? I guess I could stick a little ball of wax or something on the buffer and check to see if it gets squished by the bolt?
    If I was you
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    I'm imagining an obvious kachunk. Stobro would know. Anybody that shot 9mm out of a baby mac with a stock bolt would know.

    I had always wanted to revisit Stobro's work with a CFW bolt myself. I wonder if the x25 would be better or which is stouter in FPE and or penetration.
    Last edited by Gaujo; 07-28-2020 at 11:16 AM.

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    I would like to try the 22 TCM 9R again with the CFW bolt in a 31A and 8" barrel. I would love to see the velocity we could get.

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    The easiest options for Tok MACs are replacing the spine on Sten mags (Sten grip) as mentioned above or using vz26 mags with modified feed lips with a bolt modified to clear them. You can also spot weld some steel into the feed lips of a grease gun mag and replace the backstrap a la Sten conversion, which without further modification will mostly work. Get the feed height right for your bolt of choice. Barrels are usually sleeved as a matter of practicality, no reason you can't turn another barrel blank though.

    I also remember when Tok was dirt cheap, but remember that the value of an item is determined by the present and not the past. You got it for $80 a case, but right now 1000 rounds 7.62x25 is worth 1500 rounds of 7.62x39 or 5.45x39.

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    Shot a couple rounds today The bolt hits the buffer but not terribly hard. I taped a small ball of beeswax to the inside of the buffer. The wax was flattened but not smashed super thin. Might have to try and find a stiffer recoil spring?
    If I was you
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    So what are you using for a spring, the one that comes with the CF(W) bolt? If so, I would start with an OEM spring. You're are probably going to need to cut a few coils. The CF(W) bolt recoil spring is designed for 9X19 Luger. It is my understanding that 7.62x25 Tokarev is a more powerful round. 9mm with an OEM steel bolt would use a stronger spring. So with a CF(W) bolt and 7.62x25 an OEM spring with a few coils cut should work.

    Thank you for the heads up on how much the surplus 7.62x25 is selling for. I have a half dozen cases in the garage with two spam cans each. Now seems like a good time to sell some. I had no idea that stuff was selling for that much.

    Scott

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    I'm using the CF-W spring that came with the bolt. I hadn't thought of using the standard m11/9 spring. I'll have to compare the two.
    If I was you
    I'd be worried about me.

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    I’d definitely use an OEM M-11/9 recoil spring with the 7.62x25 round and begin with it unclipped.
    Please visit my FB page for the latest CF-W bolt information.
    https://www.facebook.com/VegasSMG/?ref

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