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Thread: 12GA FH Slug Tester --

  1. #1
    Slug Master
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    12GA FH Slug Tester --

    I am visiter here. I have the means to test
    how good big lead slugs work, as far as leading
    barrels and terminal performance.Ed


  2. #2
    Boolit Master At Heavens Range 2007 cherok9878's Avatar
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    welcome, hubel458, to the hallowed halls of casting. Most everyone here has experience overflowing, (not I). Expand somewhat on your latest endevor!
    again..........welcome

  3. #3
    Slug Master
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    Cherok- Two others and myself over on AR forums developed a
    super 12ga Paradox type shotgun/rifle cartridge.We solved the problem of weak brass cases, by putting 12ga rims on bmg
    brass, and using cases in couple guns full length.I put
    mine in a Savage 210 in picture above, with heavy barrel and stock.We also tested shortened versions in NEF 12ga Ultra
    Slug gun and 12ga Encore. Rob one of developers, who had
    original idea and gave it the name 12Ga From Hell, has his
    on a big Borchardt falling block.In the Savage I can get a hardened Dixie 730 gr slug out at 2700 and a hardened 600
    gr out at 3000 fps.Ed

  4. #4
    Boolit Master
    lar45's Avatar
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    Hi Ed, good to see you over here. Is that 12 FH built on the Savage action? Have you tried it with brass/copper bullets? What kind of pressures is it safe to? I haven't been to the AA big bore forum in awhile to keep up on it.
    I believe that there are a few guys here that got 12 bore molds when www.mountianmolds.com was making them.
    I tried lathe boreing a 12 bore mold, but didn't get very far. That was before I converted to CNC, but I never got back to it. My thought was to make lube grooves and driving bands in equal steps in a long/deep mold. Then make a base plug that could be moved up and down to make different weight bullets. Also the base plugs could be made for plain base or hollow base.
    Here are some cast slugs that came out from 750 grain to over 2000.

    They are definatly not pretty. I was getting lots of chatter when boring the mold, but have since tightened up the axis' when I did the CNC conversion.

    How much reinforcement of the stock did you have to do?
    Looks too cool.
    later.
    Home of Carnauba Red- Premium High Speed Lube.
    http://www.lsstuff.com - Bussiness email: LsStuff@AOL.com -

  5. #5
    Slug Master
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    Lar- yes I used Savage 210 12ga action.Bolt has 3
    locking lugs. I calculated what safe bolt thrust
    is based on action thickness and hold loads to 35k psi.
    Used heavy Pacnor barrel, gun is 25 lbs.Used a heavy weighted
    maple stock ,w ith crosspins going through a steel
    bedding block and a barrel ring at front of stock.
    Tested Bridger 750 gr banded brass slugs to 2500 fps.
    Rob got them to 3000 in Borchardt.Here is pic of 3
    slugs in cases and bmg case with rim turned off, threaded for
    the 12ga rims shown..Ed


  6. #6
    Slug Master
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    Been testing 600 gr hollowpointe hardened slugs and here
    is what one at about 2800 fps does to a 6 gal
    pail of water.Ed


  7. #7
    Banned Bucks Owin's Avatar
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    Holey moley!

    Now THAT'S "terminal performance"!!!

    Dennis

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    It hurts, just thinking of touching that one off. I do believe I could develop a serious flinch, shooting that one very much!

  9. #9
    Boolit Master versifier's Avatar
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    At 25lbs, I wonder how much it does kick? I notice there's no recoil pad on it.... Those homemade artillary shells are impressive looking. I bet they'd stop a small imported car. How long are the finished cases? Have you used it on live game?
    Born OK the first time.

  10. #10
    Slug Master
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    Cases are 3.85 inches long. The gun has a thick recoil pad,
    proper shaped stock. 25 lbs, and it shoot easy.Haven't used
    it on game. Maybe will deer hunt with slugs later.In a little while I will have a bunch
    12ga rim pieces to supply those who can take them and
    thread the case themselves.Rims are precision made
    and if case has original rim turned down and stub
    threaded 5/8 by 24, rims go on easy.Just add
    loctite.Ed

  11. #11
    Boolit Master At Heavens Range 2007 cherok9878's Avatar
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    Ed!!!!!Shooting Deer with this round would equate to hunting squirrels with a .458. This thing would probably penetrate "TWO" Elephant lengthwise. You give a whole new meaning to BIG BORE! Knock your self out guy, please keep us informed of your progress. I would love to be present when this thing is touched off!!!

  12. #12
    Slug Master
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    Got a Nef ultra slug gun using a shortened version of
    our case.Got 600 gr hardened slug up to 2000 fps.
    Not bad for NEF break action with weight added.
    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.


  13. #13
    Slug Master
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    Anyone wanting to get into 12ga bigbore NEF shooting;
    Nef 12ga Ultra slug gun at gunshop $225 US.Add weight to butt and forearm. Get a thicker pad.
    Get a box of 10 brass cases from Rocky Mtn Cartridge
    for 60 bucks. These cases use shotgun primers, have thick
    base like our case, have thick sides to fit chambers
    right, No chamber work needed, use as is.
    As you fire these cases they work harden, and can go faster.
    600gr at 1750 fps possible,at first.. that's 4000 ft lbs.Ed

  14. #14
    Boolit Master guninhand's Avatar
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    Quote Originally Posted by hubel458
    Anyone wanting to get into 12ga bigbore Get a box of 10 brass cases from Rocky Mtn Cartridge
    for 60 bucks. These cases use shotgun primers, have thick
    base like our case, have thick sides to fit chambers
    right, No chamber work needed, use as is.
    As you fire these cases they work harden, and can go faster.
    600gr at 1750 fps possible,at first.. that's 4000 ft lbs.Ed
    hubel 458,

    I have a fully rifled and magnaported barrel for my Benelli M1. How do you calculate max psi for that gun and the psi of a loaded round? What diameter slug do you use and who sells the mold? Could a Lee or Lyman 12ga mold be opened, and deepened, to get the right diameter and a heavier slug?

    Should I go to A15.com big bore section for most complete answers?

  15. #15
    Slug Master
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    WE figured heavy barreled NEF good for 20,000 psi
    slow powder loads. Depending on muzzle thickness of
    Benelli maybe 15,000 psi. There is guy in Greece
    with Benlli Nova that is doing a heavy alloy barrel
    which should take 25,000 psi.Formulas are real long and not simple to write out here.I will be getting some Rocky Mtn cases and get loads developed and chronoed and let folks know what
    possibilities their guns have.I use hardened .730 cast
    Dixie 600gr slugs. A casting expert I am not. I think molds
    can be reamed out if needed.Others here will know
    for sure.Ed.

  16. #16
    Boolit Master guninhand's Avatar
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    Looks lik I'd have to stick with loading manual maximums for 3 inch slugs. Tks for reply.

  17. #17
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    .................hubel458, welcome to the board. Yeesh! I wouldn't shoot one of those on a bet. Way cool looking though! So what do you do for fun?

    ..................Buckshot
    Father Grand Caster watches over you my brother. Go now and pour yourself a hot one. May the Sacred Silver Stream be with you always

    Proud former Shooters.Com Cast Bullet alumnus and plank owner.

    "The Republic can survive a Barack Obama, who is, after all, merely a fool. It is less likely to survive a multitude of fools such as those who made him their president."

    Shrink the State End the Fed Balance the budget Make a profit Leave an inheritance

  18. #18
    Slug Master
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    Buchshot-They shoot easy. They have proper weight
    and balance..Testing stick powders in NEF, short version of our
    case. Case is 3.07 inches long.
    Using 600 gr hardened slugs. Got 1700 fps
    with 215 gr of RL-25. Cases eject easy.Gun roars,
    but is working good... Still tight.Ed

  19. #19
    Slug Master
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    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

  20. #20
    Slug Master
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    We are going to test smooth bore slugs, made for that purpose by
    Dixie Slugs.And will soon have a replica 1887 lever gun
    to test our cases in.Modern forged reciever, able to
    take high pressures.Ed

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check