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Thread: 357AR pistol build

  1. #41
    Gunco Regular willie's Avatar
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    Cool build Moleman. Been inching along on a hybrid 50AE/357 (440 Corbon) barrel for my Desert Eagle. Have made my sizing & fire forming dies. Picked up a couple of HS Precision accuracy barrels for cheap. Looked at just reaming factory 357 barrel but not enough meat at the factory gas hole location. Machining a DE barrel is just a PIA. Bought some long .116 diameter gundrills to work from the front end and will EDM the gasport. In the end it will be a 3 peice barrel sans pins and screws. Friggin need for speed is contagious.

  2. #42
    gunco irregular moleman's Avatar
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    That sounds like an awesome build Willie! Speed and performance is contagious, I've already been thinking about another version with more case capacity. Is there a build thread on your build yet? Just curious on how you're doing the lug recesses or is made similar to an ar15 where it screws on? It's been 20+ years since I've shot a DE.

  3. #43
    Gunco Regular willie's Avatar
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    I am bad about not posting stuff. The old DE barrels were a two piece screwed (?) and pinned. The new barrels are one piece. Mine will be three.... locking lug like an AR extension, barrel and gas block. Instead of drilling the gas tube from the chamber end and plugging mine will be gundrilled from the front stopping right before the bell mouth chamber. We have a few EDMs at work and should be able to do the gas port intersection just after the case mouth. Have repo rubber casted this detail on 357, 44, 440 & 50AE. Have a 357 barrel new style that a friend gave me that he found cuz it is "Ringed" and some moron totally ding the crap out on the muzzle my guess hammering out two stuck slugs. I have no 357 bolt and will sleeve it 44mag Mark XIX style. My pistol is a 44 Mark VII. Picked up a complete 50 top end w/ slide (ebay) for the XIX conversion. Buying factory new was not an option friggin expensive. Now that the garage shop is up time is the hurtle.

  4. #44
    Where's my lathe? ashhoe's Avatar
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    Hate to pull a thread back from the dead but, I gots questions.
    The expanders you used, I assume they are purpose built by you. Correct? If they're commercial I'd love a link but I bet I'm right and I can fab that sort of stuff up.
    I think I found a source for a barrel that comes well recommended but I wondered about dies. Do you use 357MAX dies?
    Unsleeping minds need answers.
    Also, does this cartridge have any other names? It seems like such a perfect evolution of the 5.56 case that others should have tried it and maybe it has other monikers.
    Lastly, are you busting the pistol out next week? If I hit one more deer with my truck I'm blaming you for not doing your part.
    Whatever site I read it on as a members tag line, it's the truest statement ever made.
    "Our forefathers would have been shooting by now"
    They would have a long time ago, when our government became self serving and lied so openly that the taste of disgust can't be cleared with bleach.
    WTF happened to our country?
    member # 575

  5. #45
    gunco irregular moleman's Avatar
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    I'm using a Lee 38-357 mag max die set I got back in the 90s when I had a 4" 357 black hawk for about 2 months. I liked the gun but couldn't hit worth a crap with it so I sold it. The two expanding arbors fit into the powder through die so you can neck up 223 brass while forming them. There is no change to the powder through die, so once the cases are formed you can change it back if you want to. I am using a Lee factory crimp die because you cannot crimp the case into the groove since it head spaces on the case mouth. I got the 27" barrel blank used on the pistol and 18" rifle from Green Mountain. It's a .358" 1:14" twist CM blank that was $100 IIRC. The case is basically a rimless 357 Maximum loaded up to 223/5.56 pressures. There is a 357 auto (or something) that is a rimless 357 mag, but I hadn't seen any references to anyone who had made a rimless 357max so I had a poll on WG on what to name it and 357AR stuck. Since MI said straight walled pistol caliber rifles are ok now in the shotgun zone, I'll be using the 18" barreled upper.

  6. #46
    aka: SDK1968 dutigaf's Avatar
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    ah so you got that same boost that we been talking about for straight walled cartridges.... what kind of limits did they give you Dan?
    say what you mean & mean what you say


  7. #47
    Where's my lathe? ashhoe's Avatar
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    Well, I'll pass that info on to my barrel guy. I assume he'll know what to do. I need to "die up" and go on a powder hunt too I think.
    I have time but I like to get things rolling as soon as I can, I bought a Sig P227 45 ACP when I hit 45 years old and immediately started saving money for when I turn .50 (yes, .50) and I'm thinking a big ole' Barret.
    Whatever site I read it on as a members tag line, it's the truest statement ever made.
    "Our forefathers would have been shooting by now"
    They would have a long time ago, when our government became self serving and lied so openly that the taste of disgust can't be cleared with bleach.
    WTF happened to our country?
    member # 575

  8. #48
    gunco irregular moleman's Avatar
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    Quote Originally Posted by dutigaf View Post
    ah so you got that same boost that we been talking about for straight walled cartridges.... what kind of limits did they give you Dan?
    At least .35" caliber, straight walled case, case length between 1.2" to 1.8", 5 rounds in the gun and mag combined.

  9. #49
    gunco irregular moleman's Avatar
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    IDK if I posted it earlier in the thread, but here is a site with a ton on info on loading the 357max "hot". The Great .357 Remington Maximum Revival Since the 357AR is basically the same thing without the rim so you can use it in an ar15, it's a good reference. There are slight differences between max brass and modified 223 brass, and especially chambers and the amount of leade, so you really need to work up loads. So far going off of Quick Load, I've had some go higher, and some be lower than what QL said.

  10. #50
    aka: SDK1968 dutigaf's Avatar
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    Quote Originally Posted by moleman View Post
    At least .35" caliber, straight walled case, case length between 1.2" to 1.8", 5 rounds in the gun and mag combined.
    gotcha.

    min .35 here, straight walled case... NO limit on length.. but only 3 rounds combined. thanks for sharing!

    now back to your fantastic build...
    say what you mean & mean what you say


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