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Our 12Ga From Hell

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  • Our 12Ga From Hell

    Few of us over on AR forum developed this
    super paradox type rifle/shotgun.I mentioned
    it on other threads here about 4bores.We use
    BMG brass and put a 12ga size rim on them.
    Two others put theirs in a big Borchardt falling
    block action and I put mine on a Savage 210
    12ga action with heavy barrel and stock.
    Here is picture of our case in middle compared
    to a 700NE on the left.2nd picture is our long case
    next to a regulae 12ga plastic caseEd.



    Last edited by hubel458; March 28, 2009, 13:57.
    Ed Hubel

  • #2
    Shot a 610 grain hollowpoint Dixie hard
    slug into 6 gallon sealed pail of water.
    Going 2800 fps, and real big hollowpoint.
    First pic is pail with crimped on top.
    Pail full and has filler spout capped.
    Second pic,impact with all water atomised,
    and pail blown apart.In the next small
    fraction of a second is third after impact
    with shelf cleared, the hyrostatic pressure
    down, has bent top of steel frame shelf.
    Same blast put jug pieces all over.
    Got to get a 15 gallon one. Behind
    you see my wood bundle backstop...Ed





    Ed Hubel

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    • #3
      THAT IS FREEKIN AWESOME !

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      • #4
        Take a look at the cabinet the bucket is sitting on before and after the shot. Look how much the top is bent in the after shot. Shows how much force was generated by the bullet passing through the bucket.

        Now that is some good stuff!

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        • #5
          How big are the wheels? (How is your shoulder?)

          flashguy
          [FONT=Arial]When they ask me, "Paper or plastic?" I just say, "Doesn't matter to me. I am bi-sacksual." [/FONT]

          Texan by choice, not accident of birth

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          • #6
            The gun don't kick much, has big pad and 25 lbs.
            About like a little 458 Lott in a 10 lb gun.
            It is Savage 210 bolt action with heavy barrel and stock-
            Here is picture.Second,third, 4th, 5th pictures are of a variety
            slugs we have tested and shot.Ed









            Last edited by hubel458; March 28, 2009, 14:08.
            Ed Hubel

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            • #7
              SWEET!

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              • #8
                I picked up a 12ga NEF Ultra Slug gun.
                With 24 inch short barrel.
                Added weight and thumbhole stock.
                Gun weighted to 15 lbs so
                far. I got 600gr hard slug to
                1650-1700 so far, and shoots easy.
                Got 1 1/2 inch thick pad.Working up different
                loads.Should get over 2000.
                Cases eject easy,no resizing needed
                on bottom half of case,action opens easy,
                no evidence of binding.Started case 3.2 inch,
                settled on case length of 3.15-- Chamber being
                full size max 12ga size expands top half of case
                more than my minimum chamber in Savage does,
                so little more effort needed to size.Our case, though many times stronger than regular
                12ga cases is thinner at mouth, so that is
                why I used tight chamber on Savage.Still
                can't get used to mickey mouse short barrel.
                Anyone know of a genius who could
                make long alloy barrel with pivot mounted?
                Cases can be 3 inches on up to
                our length, and work.Ed

                Ed Hubel

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                • #9
                  We got 600 gr in NEF up to 2000fps.
                  Being some guns need to much work
                  to fire bmg primers, it easier to
                  do the following with adapter bushings.
                  Here is picture of cases for primer
                  comparisons.1st is regular bmg
                  primer. 2nd is adapted to a shotgun primer.
                  3rd is adapted to large rifle primer.
                  Of the 2 adaptations, large rifle is
                  easier to do, just ream out pocket, thread in adapter, but adapting shotgun primer
                  you have to deepen the original primer
                  pocket a little, then thread and screw in
                  a bushing.These two primers give about
                  100 fps less than bmg primer.Ed.

                  Ed Hubel

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                  • #10
                    Testing Savage with long case-Got 2550 with
                    320gr WC-855H special ball.730 gr slug.
                    Same slug,
                    300gr of RL-25 got 2400. 300 gr of RL-22
                    got 2800. 280 gr of W-760 ball got 2900.
                    Will hold more 760, but pressures around 40k on last
                    two loads mentioned.Savage extracts easy,
                    bellers like a tank gun.Ed
                    Ed Hubel

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                    • #11
                      We got recoil now-Got a 1050 gr
                      Bridger over 2200 fps in the Savage.
                      I took the hollow base 750 gr Bridgers
                      made for me, and wedged in .500 caliber
                      slugs(I took out of 12ga sabot)in the base.
                      Added 300 gr. I was going to melt lead and put in,
                      but this was easier about 5 seconds,
                      after 15 seconds shortening nose on grinder
                      of .500 slug.Ed
                      Ed Hubel

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                      • #12
                        i would like to see more of how you made that brass , cool gun .
                        "He who feels no pride in his ancestors is unworthy to be remembered by his
                        descendants" Major David French Boyd, 9th Louisiana Infantry, Confederate States army

                        <br />\"may your trails be crooked,winding,lonesome,dangerous,leading to the most amazing view.<br />may your mountains rise into and above the clouds\"<br /> e.a.

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                        • #13
                          We turned rim off of bmg cases to the bottom of extractor groove and the stub left we threaded
                          for premade 12ga threaded rim pieces.In picture
                          you see case threaded and rims that go on
                          it. Holds on good with loctite.The work on case
                          has no effect on the thickness of casehead
                          ahead of the groove, so cases are as
                          strong as originals for high pressure.Ed

                          Ed Hubel

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                          • #14
                            Got the NEF chambered for long 3.85" case. And it
                            has beefed up hammer for bmg primers used in our case.
                            Got 2500 fps with 600 gr slug, cases eject out real easy,
                            8300 ft lbs from an NEF with 24 inch barrel.If you set up
                            NEF to use regular primers adapted to our case or
                            have Rocky Mtn make a long case you can do it without
                            a lot of work on the hammer and springs. Just use a
                            flake shotgun powder as a starter powder above the
                            primer, which how 700 NE and others are loaded.
                            Use 10 gr of flake and cut regular load 40 gr and
                            work up if pressures allow.Ed.
                            Ed Hubel

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                            • #15
                              Found an O/U that would handle the IMR4759 3"
                              loads. We got 600gr to 1800 in 3" case.
                              It is the Zoli Z-Sport. Expensive,
                              all alloy steel construction, tested to
                              about 100k. That's not a missprint.Their
                              site shows testing at the Italian proof house
                              of 8000 bar.That's 7-8 times regular shotgun
                              working loads.Pic of action below. It handling that extreme pressure, means that other quality
                              O/U like Ruger would handle 4759 loads.Ed

                              Ed Hubel

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