APOD Firearms

357 rimless maximum?

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  • capt.joe

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    I've been researching this for an AR build. Basically a straight walled 223 case. Seems like 2 companies have built a few barrels. I contacted them today. Hope to hear something soon.
     

    SAWMAN

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    What is the COAL ??
    What would the bbl be sized to ??
    I assume that you could use the 223/5.56 mags and bolt. What would be the working pressure ?? How fast would it push a 125gr pistol bullet out of a 18-20" bbl ?? ---- SAWMAN
     

    capt.joe

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    I can post the links to the threads if you like Sawman. 358 cal 1:14 barrel 16 inch? I believe they are setting COAL to fit in a standard mag. Not sure about pressure but I saw where they were up to 35 remington velocities and testing higher. I saw where 357 max rimmed can hit 2700 fps with light bullets, 2200 with 200 grain good groups at 200 yds. I had to order some 327 federal cases from starline so I added 250 unprocessed 223 cases to my order. I read its as simple as running through a 357 magnum forming die, trim to length, and inside ream for handloading an unprocessed case.
     
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    capt.joe

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    Here's a pic of some ammo
     

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    SAWMAN

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    I would guess not able to use 223/5.56 brass. I would think that it would be impossible to open .224" to .358".
    This seems to be a great project. If a 20" AR was capeable of produceing 35Rem vels with the 180-220gr bullets,the gun would be a great closer range hog/deer thumper.
    From reading thru the links,the weak point would be making or even buying brass and the "tall grass" loss thereof. ---- SAWMAN
     

    bowfreak

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    I was thinking maybe it could be done similar to the way that 300 blackout brass is made but maybe not
     

    capt.joe

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    The reason I came across this was I am buying a tc g2 contender frame when I get home. I've got a 327 federal barrel on the way. I want to get into reloading and like the idea of straight wall cases. I was already planning my bigger cartridge to play with and found out about 357 maximum. Then I started looking at case dimensions and saw a reference to 357 rimless max. I can hopefully build this in an AR and have a barrel built for my contender. I think it fits what im reading about smaller case head/higher pressure without stretching the frame on my contender. Bigger case heads and over pressure ruins the frame of a contender.
     

    capt.joe

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    I might be wrong, but couldnt a person turn down the rim and cut an extractor groove on a 357 maximum rimmed case?
     

    Drauka99

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    Very interesting cartridge.

    Keep us updated with the build please.
     

    capt.joe

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    Mad Dog Weapons says it will be about 20 days before he can finish the blanks and start shipping. He made a batch of 10 that customers are playing with. My order is part of another batch of 10 that turned into a 20 barrel order. Now that its on his website for preorder, they are $325 shipped
     

    FrommerStop

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    There are 9 x39 cartridges at use in other countries for the AK for military and hunting purposes. There at one time was a .35 cal load on the AK case as a wild cat here. Some were rebarreling mini-30 rugers in it.
    Honestly for hunting with a .35 rem like cartridge I would go to the older marlin in .35 remington.
     

    FrommerStop

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    looks like you searching for cartridge like the one below
    dsc00159-4-w640h640.jpg
    Here are some new ones. In a locked breech rifle these would do what you want.
    25487.jpg
    You would have to turn down the rim to get it to work. Might want to use an AK bolt.
    cd351winchesterslr.jpg
     

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