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Next Generation Squad Weapon

Discussion in 'Weapons' started by Poppy, Sep 8, 2019.

  1. Poppy

    Poppy grasshopper Patron  

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    27 month evaluation of a new 6.8mm round.
    wonder about this new 'cased telescoping' round.
    I cant view the page well on phone.
    maybe usmcprice could comment or someone with similar knowledge.
    what's up with the telescoping round- why does it look so weird, and could there be feed problems with the blunt nose...

    Army Starts Testing Next Generation Squad Weapons In 27-Month Test
     
  2. George Patton

    George Patton Canadian Refugee

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    In short, the bullet is inside the cartridge case (on 99.9% of cartridges, the bullet extrudes from the end of the case). Theoretical advantages are reduction in cartridge length, possible reduction in weight (dependent on a number of factors), and lower probability of damaging the bullet prior to firing.

    Re: feed problems; possible -- this is dependent on the geometry of the feed ramp and chamber. IMHO with the geometry correct, the propensity to mis-feed would be no more than with a traditional bullet.

    [​IMG]
     
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  3. OpanaPointer

    OpanaPointer I Point at Opana Staff Member Patron   WW2|ORG Editor

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    Having rounds cylindrical all the way up would reduce jams and improve feed speed, yes?
     
  4. belasar

    belasar Court Jester Staff Member

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    Another dynamite gun? ;)
     
  5. OpanaPointer

    OpanaPointer I Point at Opana Staff Member Patron   WW2|ORG Editor

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    Don't go all Vesuvius on us. o_O
     
  6. Poppy

    Poppy grasshopper Patron  

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    cool info GP, thanks.
    guess the caseless rounds didn't work out.

    the article mentioned possible feed issues, but seems if chamber is exact size of case- yeah would think feed would be better.
    I dont quite understand what happens to the round tip closure at end of round...is it plastic and is ejected, is it metal.. .is it burnt up when round is fired...

    how do you feel about the calibre-
    is it meaty enough...
    did they go for a high velocity round vs a heavy slug...like the AR vs AK
     
    Last edited: Sep 9, 2019
  7. Poppy

    Poppy grasshopper Patron  

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    looking again at the end of bullet.
    is the 'telescoping ' part of the bullet meant to squeeze the round out, in order to increase velocity?
    could the Gerlich principle be at play here?
     
  8. Poppy

    Poppy grasshopper Patron  

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    if recalling- the squeeze bore would cause the barrel to wear quickly.
    by using the case to squeeze the bullet, maybe barrel wear wouldn't be so bad . ..am I way off base here?

    want to see the new saw burn off several thousand rounds to see if it melts like that cool utube vid.
     
  9. Poppy

    Poppy grasshopper Patron  

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    this is not the video, but it is tres cool.
     
  10. KodiakBeer

    KodiakBeer Member

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    Gaines is a former target shooter, so maybe he'll drop in and comment ... on my comment. One of the issues that comes up in reloading for accuracy is the "jump" from the chamber to actual contact with the lands and grooves in the bore. It's a tricky thing getting the overall cartridge length to where the slug just 'kisses' the rifling. If you get that, the cartridge will seat perfectly and when fired is already in contact with the rifling to give the least deformation and the best accuracy. If the overall length (OAL) is just a tad short the slug must 'jump' that distance and several things happen - things that don't matter in an average hunting rifle, but matter a lot when accuracy at extreme range is needed. The slugs will deform ever so slightly when hitting the rifling if they must jump, and each slug will deform slightly different affecting accuracy. Also, that slight gap allows gases back into the chamber around the cartridge case and each time the pressure will differ slightly.
    There's nothing catastrophic about any of that and the average shooter won't and shouldn't care. Your accuracy is still good enough to land a round in a deer's chest cavity at any reasonable range. HOWEVER, it matters a lot to a target shooter. It's the difference between half inch groups and one inch groups at 100 meters. So this cartridge has a jump much greater than any traditional cartridge and they want ranges out to 600 meters?
    I can't quite fathom how they expect great accuracy at extreme range with that big jump?

    .
     
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  11. belasar

    belasar Court Jester Staff Member

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    I can't help it, sometimes I just randomly blow my top!
     
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