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Thread: 5.7x28mm precision rifle...

  1. #11
    Gunco Regular Gunter's Avatar
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    I have a model 983 22WMR, so I can help a little.

    The bolt handle is the only locking lug.

    The firing pin is offset in the bolt for rimfire, so either you would have to convert it to centerfire somehow or a new bolt.

    5.7x28 will not fit in a std WMR magazine.

    Really, other than the use against Kevlar, I would think that the 22WMR or the 17HMR would be a better round.

    I would like to know the SAAMI or CIP rating for the 5.7 is. One reference said that the case was able to stand 50,000psi.
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  2. #12
    tired of idiots vz58's Avatar
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    Quote Originally Posted by [486] View Post
    Actually, it's a bottlenecked case.
    Actually there is a bottle neck but after that unlike other rounds it IS a straight walled case, that is what I was refering to


    and the 17HMR will penetrate the front panel of a vest. I have done it. It however lacks enough velocity to damage the inside of the second panel

  3. #13
    Gunco Veteran [486]'s Avatar
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    Quote Originally Posted by vz58 View Post
    Actually there is a bottle neck but after that unlike other rounds it IS a straight walled case, that is what I was referring to
    Huh, but the chamber has to have at least 1 degree of taper, otherwise extraction might be troublesome, but then again revolvers use straight walled cases...

    and the 17HMR will penetrate the front panel of a vest. I have done it. It however lacks enough velocity to damage the inside of the second panel
    ]

    Interesting, what style bullet did you use, I've only seen ballistic tip, I wonder what the .17 remington would do...

  4. #14
    tired of idiots vz58's Avatar
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    .17 remington slices right through

    Used FMJ on the 17 HMR


    the body of the 5.7x28 is straight, no taper

  5. #15
    Happy Camper hcpookie's Avatar
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    A 5.7x28 uses a light .223 bullet. Reloads are using right around 35-40 grain bullets. I don't know EXACTLY what the caliber is for a .22 magnum. You really need a .223 barrel.

    It could *NOT* use a .22 LR barrel because they are not built to handle centerfire chamber pressures. If the .22 WMR has similar light pressures then it is a no-go.

    Not sure that it would be a good idea, but you'd need to evaluate the chamber pressures that the .22 generates vs. a 5.7 caliber. That will be the deal breaker.
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  6. #16
    No Hope For Me 1biggun's Avatar
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    IF I RECALL CORRECTLY THE THE 22 MAG USES A .223 DIA BULLET IN VARIUS WEIGHTS. SOME WERE I READ A POST WERE GUYS ACTUALLY PULLED THE 22 MAG ROUND APART AND LOADED THEM WITH DIFFERANT POWDERS AND BULLETS FOR BETTER ACCURACY AND PERFORMANCE. THE 22 MAAD IS A SLIGHTLY LARGER OD CASE THAN A RIM FIRE IF I RECALL..

    A REAMER REALLY NEEEDS TO HAVE A PILOT TO CENTER IT IN THE BORE. A DRILL BIT MIGHT MAKE A FUNCTIONAL FIRE ARM BUT IT WILL NOT LIKELY BE ACCURATE. YOU WILL STILL NEED TO CUT THE NECK , SHOULDER , THROAT, AND FREE BORE.

    THERE ARE UPPERS FOR THE AR IN 5.7X28

  7. #17
    No Hope For Me 1biggun's Avatar
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    APARENTLY CEEKAY IS NOT THE ONLY ONE INTERESTED IN DOING THIS. HERE IS A GOOD LINK ABOUT IT. IT MENTIONS CALHOON AS DOING CONVERSIONS ON 22 ACTIONS.

    4.4x28 in Rem 580 action - Saubier.com

    HOPE THIS HELPS. INTERESTING STUFF.

    FNH USA soon to release 5.7x28 Bolt action [Archive] - TheFiringLine Forums

    Reloading the 5.7x28 - Cast Boolits

    5.7x28 fn in a Rifle? - Benchrest Central Forums

    Untitled Document
    Last edited by 1biggun; 02-09-2009 at 02:21 PM.

  8. #18
    tired of idiots vz58's Avatar
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    I got curious and looked at a bunch of 22lr and 22 mag bolt actions I have. I really think some of these would be strong enough for the 5.7. No no engineering behind it but just feel. The 5.7 is a weak round. (yes I know the ballistics for it). I have no doubt some of these 22 mag would hold up to a 9mm. Just my .02

  9. #19
    Gunco Rookie jimr's Avatar
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    Default This might work for you

    Find yourself a destroyer carbine and rebarrel and chamber it.
    It is cambered for the 9mm largo. Also the extractor will
    also need work. I converted one to the 7,62 x 25 works
    fine.

  10. #20
    No Hope For Me 1biggun's Avatar
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    Find yourself a destroyer carbine and rebarrel and chamber it.
    It is cambered for the 9mm largo. Also the extractor will
    also need work. I converted one to the 7,62 x 25 works
    fine.
    would love to see some pictures of it.

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