Big Bore PDW

Would re-barreling a short .308 to a necked-up caliber like .358 Winchester or 8.6BLK be effective?

Similar to how 300BLK works better than 5.56mm out of a short barrel. Less muzzle flash, more powder burn, and more energy on target?

Also, post other big bore stuff

  1. 1 month ago
    Anonymous

    ksg sbs with slugs will be better

  2. 1 month ago
    Anonymous

    here's a crazy idea: shorten a 6.8 SPC and neck it up to .40

    • 1 month ago
      Anonymous

      Underrated comment,
      heck might even work in a pistol.

  3. 1 month ago
    Anonymous

    Why not just push an icepick into your ear much cheaper

    • 1 month ago
      Anonymous

      >you are walking through the desert and see a tortoise laying on it's back but you're not helping
      Why is that, Leon?

  4. 1 month ago
    Anonymous

    >Would re-barreling a short .308 to a necked-up caliber like .358 Winchester or 8.6BLK be effective?
    Of course. The .358 win is the most efficient form of the short case.

    • 1 month ago
      Anonymous

      358 win is the least efficient, it should drive the same weight bullet as 338 federal faster than 338 fed, but it doesnt.

      • 1 month ago
        Anonymous
        • 1 month ago
          Anonymous

          Wow she is perfect. Who is she?

          • 1 month ago
            Anonymous

            >perfect
            >t. simpering involuntahmp8trily celibate

            • 1 month ago
              Anonymous

              I need to know god damn it. Please anon, I beg you, who is she?

      • 1 month ago
        Anonymous

        >it doesnt
        Check your math, show your work.

  5. 1 month ago
    Anonymous

    The HK53 was used by bong SF as a "SMG" chambered in 5.56 NATO, sounds pretty decent

    • 1 month ago
      Anonymous

      Whoever designed the HK51 and said "this is an acceptable platform" needs to be hanged.

      • 1 month ago
        Anonymous

        yeah but it's really funny

  6. 1 month ago
    Anonymous

    >Rebarreling .308 to a necked up caliber
    .44automag bruh

    • 1 month ago
      Anonymous

      Just checked the numbers, .44AMP is really close in velocity to 300BLK and .308 out of similar length barrels.

      If I get a wild hare up my ass, I might actually build this monstrosity.

  7. 1 month ago
    Anonymous

    or just get a .50 beowulf upper and call it a day.

  8. 1 month ago
    Anonymous

    honestly you are FAR better off just going straight to 300 BLK with a barrel that short. You are getting absolutely nothing unless you use very specific loads meant to fragment at very low velocities in 308, and 300 BLK will happily shoot subsonics from an 8" all day long and be very quiet to boot.

    • 1 month ago
      Anonymous

      or just get a .50 beowulf upper and call it a day.

      Yeah, but AR stuff doesn't tickle me the same way. Hoplopfheil did some testing, and found that the velocities of .308 out of the PTR51 were about the same as 300BLK, just with extra muzzle blast. That's what made me think of this.

      >Rebarreling .308 to a necked up caliber
      .44automag bruh

      Good thought, that one slipped my mind.

  9. 1 month ago
    Anonymous

    Or, you know, a round that actually exists, like .350 legend.

    • 1 month ago
      Anonymous

      >350 legend.
      >vs. .358win
      Say you're under 30 without saying you're under 30.

      • 1 month ago
        Anonymous

        Yeah, it's almost 4x the price for a round with significantly lower efficiency in short barrels. The problem is that you WANT short for caliber projectiles in short barrel guns because they accelerate faster and absorb energy from the powder faster. Otherwise you waste case capacity or have a shitload of muzzle blast. Also you can just get 255 grain subs for 350, or 150-200 grain HP supers for it.

    • 1 month ago
      Anonymous

      What do you need to convert an AR to .350 legend? Barrel, bolt and magazine?

      That looks like a .300blk lancer mag. They make actual .350lgnd mags for AR's that would probalby be more reliable. How does converting over work?

      • 1 month ago
        Anonymous

        Bolt is the same.

        .358 winchester was designed shittiliy, fairly low pressure.
        Go with 338 federal, or up to 375 raptor.

        358 win is the least efficient, it should drive the same weight bullet as 338 federal faster than 338 fed, but it doesnt.

        ...you guys know that you can increase the pressure of older cartridges safely in modern rifles, right?

      • 1 month ago
        Anonymous

        The lancer mags suck, get a CMMG steel mag.
        You need: a barrel and a new mag for last round reliability. Bolt and everything else is the same.

        • 1 month ago
          Anonymous

          I assume you mean for the wrong caliber but then so all mags. Nothing wrong with cmmg but Lancer are fine magazines, for their designated caliber.

          • 1 month ago
            Anonymous

            I bought ones labeled for 350 legend (in that pic. With the mag loaded to 20 rounds, it's rated capacity, you have to hammer the mag in with your first to get it to lock in. The lips open up under the tension of the rounds.

  10. 1 month ago
    Anonymous

    I'm not sure if you've seen the fireball from an 8" .308 but firing one of those off is like getting slapped in face. You can put a side facing compensator on it and really make sure that absolutely everyone at the range hates your guts. Why bother rebarreling it.

  11. 1 month ago
    Anonymous

    8.6 BO is just shitty 338 federal, retard.

  12. 1 month ago
    Anonymous

    .358 winchester was designed shittiliy, fairly low pressure.
    Go with 338 federal, or up to 375 raptor.

  13. 1 month ago
    Anonymous

    Wouldn't switching to a bullpup design and having a relatively normal barrel length be better than coping with some wonky close range chungus destroyer extreme chode round?

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