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Thread: hybrid cases

  1. #1
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    hybrid cases

    Anyone try these yet? The one in my hand is factory rated at 80,000psi. I'ma run it as a 6 or 6.5

    Click image for larger version. 

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  2. #2
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    Yes, we have been testing them for years. We have had trouble with the high pressure loads. Just because the case is theoretically rated for 80,000psi, doesn't mean that the weapon system will handle it. We have had blown cases in Universal Receivers and locked up M700 actions with bolt face expansion. We have also had case separation with two piece cases, both brass/stainless and brass plastic.

  3. #3
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    Hybrid case

    Alinwa -

    Howdy

    FWIW - From my recollection...... Palmisano & Pindel were giving thought to the next " big thing " would be a case where the primer ignition producits were routed ifrst to the upper part of the case; at the more-fwd part of the powder charge.

    One way to do that, would be use of a hollow tube that would go from the inside of the case' base to however far up into the case was deemed appropriate.
    This would imply a case w/ a removal base, as a likley method of achieving the intended overall design goal(s).

    This location for powder ignition by the " primer " of course obliquely reminds of the " Dreyse Needle Gun " of the mid 1800's. It was a bolt action, too.


    With regards,
    357Mag

  4. #4
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    Quote Originally Posted by .357Mag View Post
    Alinwa -


    FWIW - From my recollection...... Palmisano & Pindel were giving thought to the next " big thing " would be a case where the primer ignition products were routed first to the upper part of the case; at the more-fwd part of the powder charge.
    If you read Elmer Keith's Gun Notes. He and a few others experimented with that method, "flash tube", of modifying cases back in the 30's. The US Government looked into it during WW2 as a method of getting higher velocities with reduced pressures in the .50BMG round. Elmer used it in his .338OKH round. The existing flash hole is modified by threading it and the a brass tube is threaded in from the case mouth using a special tool. The method claimed higher velocities, lower chamber pressures, and less throat erosion with the powders of the day, as the powder ignited at the base of the bullet and burned back towards the primer instead of being pushed up the barrel by the primer force and burning in the throat.

  5. #5
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    http://benchrest.com/showthread.php?...ronal-ignition

    http://benchrest.com/showthread.php?...ket-Conversion


    There was a bunch more of these discussions but a lot of it got lost in the 2nd archival wipeout

  6. #6
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    These cases BTW are steel based..... SIG's new FURY case

  7. #7
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    Al, I have the contact for the fellow that set up the Sig tool room and universal receivers to test them. Walt is an Arkansas guy and that is where they are located.

  8. #8
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    Al, I sent you an email.

  9. #9
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    info

    Butch, MILgunsmith -

    Thanx for the accurarized info.


    With regards,
    357Mag

  10. #10
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    Quote Originally Posted by Butch Lambert View Post
    Al, I sent you an email.
    Hmmmm........Tx Butch.... I know that guy from somewhere. Or someone else with his moniker...

  11. #11
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    Quote Originally Posted by alinwa View Post
    Anyone try these yet? The one in my hand is factory rated at 80,000psi. I'ma run it as a 6 or 6.5

    Click image for larger version. 

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Views:	152 
Size:	3.03 MB 
ID:	25365
    Steel heads. Are they still made?
    Been around for a while.
    You can go to some truly high pressures, but watch out for barrel damage.
    The leade will start to burn quickly.

  12. #12
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    Quote Originally Posted by brickeyee View Post
    Steel heads. Are they still made?
    Been around for a while.
    You can go to some truly high pressures, but watch out for barrel damage.
    The leade will start to burn quickly.
    Walt Kraftt posts on Accurate Shooter. After setting up Sigs testing shop in Arkansas, he has fooled with the 277 Sig Fury quite a bit.
    https://forum.accurateshooter.com/th...#post-38355409

  13. #13
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    Quote Originally Posted by Butch Lambert View Post
    Walt Kraftt posts on Accurate Shooter. After setting up Sigs testing shop in Arkansas, he has fooled with the 277 Sig Fury quite a bit.
    https://forum.accurateshooter.com/th...#post-38355409
    Thanks Butch.... I'll get a friend to read it for me

  14. #14
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    Quote Originally Posted by alinwa View Post
    Thanks Butch.... I'll get a friend to read it for me

    Walt's good guy. Did you get his email address that I sent to you?

  15. #15
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    Quote Originally Posted by Butch Lambert View Post
    Walt's good guy. Did you get his email address that I sent to you?
    absolutely, thank you

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