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Thread: 308 ak

  1. #271
    Gunco Veteran jreifsch80's Avatar
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    Ok yeah it doesn't matter what we proof it with just to get an idea where it will start failing in fact maybe we could even use a press to load a locked bolt in a trunnion to even simulate bolt thrust might be as good as loading a proof load with limited equepment. Which I could do that on my buddies press that has a pressure gauge that also shows how pounds or tons are being applied with the press if the bolt and trunnion can handle 5 tons (10,000 lbs) then I think that would be a great sign especially since a round being fired is maybe less than a second while a press is continuous though I wouldn't necesarily leave it loaded too increadibly long. Does that sound like it would be a good test?

    By the way what kind of pressure do factory load .243's run? I would love a .243 like you're doing but I'm not sure I want any rifle that can only eat hand loads.

    I have been thinking about wildcats for a while like say a 6x57 but loaded to match .243 performance with the larger case capacity it might keep pressure lower what do you think?

  2. #272
    Gunco Regular smartbomb's Avatar
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    biggun did you get a chance to run the thrust web page i posted saturday? if it works well enough i will start to add the flex and lug sheer calculations. i agree that real world test are good practice. the down side is having the hardware and a rigorous method. comparisons with raw data are a first start way to narrow the field.
    al gore is full of carbon enriched shit

  3. #273
    No Hope For Me 1biggun's Avatar
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    I was unabe to get the page to do any thing once opened Im not sure why. Ill try again tommorrow if I get a chance on a differant computer.

  4. #274
    No Hope For Me 1biggun's Avatar
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    xxx
    Last edited by 1biggun; 03-06-2016 at 11:00 PM.

  5. #275
    Gunco Veteran jreifsch80's Avatar
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    Thanks for the advice bg I was saying I don't want a rifle that only eats handloads as in that I can buy factory ammo at times but you're right, I'd be a fool not to reload if I were to take a .243 out to shoot. when I go shooting I usually go through at least 100 rounds an outing on my m76 same with my mauser and my x39's I'm in a hurry if I only go through 100 rounds an outing. I'll look up the 6mm turbo. I noticed in midway's catalog they have pilot drilled reloading die blanks for reasonable. Makes me think even more about some idea I've had a while, a .308 case shortened to around 40mm oal with a sharp shoulder and almost no body taper necked down to 6mm or 6.5mm (though that might be one of these 6mm turbos already or something like that)

    One question I keep forgeting to ask, how do rebated rimmed cases feed from a mag? Did you have any problems with them or is it such little difference that its a non issue?

  6. #276
    Gunco Regular smartbomb's Avatar
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    Quote Originally Posted by 1biggun View Post
    I was unabe to get the page to do any thing once opened Im not sure why. Ill try again tommorrow if I get a chance on a differant computer.
    try this. i uploaded the file to my wifes domain.

    http://www.tallycoupondiva.com/BOLTTHRUST3.html

    it should run in your browser
    al gore is full of carbon enriched shit

  7. #277
    No Hope For Me 1biggun's Avatar
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    xxx
    Last edited by 1biggun; 03-06-2016 at 11:00 PM.

  8. #278
    Gunco Regular smartbomb's Avatar
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    Quote Originally Posted by jreifsch80 View Post
    I've always wanted to adapt isreali hb hgs for an ak it looks even better than I imagined, I should get a set for my m76
    centerfire has the hgs for 14 bucks. that why i decided to give it a shot.
    al gore is full of carbon enriched shit

  9. #279
    Gunco Veteran jreifsch80's Avatar
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    Ah they still have them! Lol I think I'll order a set tomorrow also I put a m72 receiver on the back burner though I relieved the front trunnion to take g3 mags and enlarged the magwell though I have to clean the sides of the mag on the belt sander but that's cake with those alloy mags what I originally thought was a standard length bolt and carrier .308 build I think I'll finish it and do a lot of remote testing with 7.62 nato. I'm thinking of using a cheap used apex fal barrel then maybe I should use a fal gas system and handguards look at what your simple picture of isreali hg's on your ak are making me think about lol also bg your .243 build made me go the g3 mag route but that's not a bad thing you're right those shorter cases are best for me to save for an ar build so I'm not too tempted to build an ar10 and really make myself broke haha

  10. #280
    No Hope For Me 1biggun's Avatar
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    xxx
    Last edited by 1biggun; 03-06-2016 at 11:00 PM.

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