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Thread: 12 Gauge from hell

  1. #1
    Boolit Buddy
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    12 Gauge from hell

    How's it going guys? Very glad I listened to a member on a different forums advice to come here with some of my questions. My first thread ever got me set on the right track for acquiring a specialty sizing die in a short amount of time.

    This is a project of mine that I've been working on for roughly 5 months. If you've never heard of this cartridge before, you're not alone. It's pretty obscure and has caused me some headaches (probably because I'm picky and over complicate things), but it is coming together! Basically, a 12 gauge from hell is a big bore rifle cartridge. It utilizes a 3.5" brass shotgun shell (mine are lathe turned and made by RMC) and a lot of slow burning rifle powder. This keeps pressure relatively low and increases velocity by a whole bunch. The cartridge is something truly to behold. Muzzle energy can be expected to be in the 8000 ft-lb+ realm with velocities for a 600 gr projectile at over 2000 fps. Best part is, it can still chamber and fire regular 12 gauge ammunition from any box store and be used on deer one day, to the largest of big game.

    It requires a very strong and beefy firearm to handle this monster. I chose to use an H&R ultra slug as my base as it requires very little modification. From the factory the H&R is chambered at 3". The only thing required is to lengthen the chamber to 3.5", add a better pad, and increase the weight to help tame the ridiculous recoil energy. I opted to remove the scope rail (I don't feel like losing an eye) and install a peep sight made by Skinner and will have my smith install a front blade sight when he does my chamber work.

    As of now I am awaiting a sizing die, chamber work, and an annealing machine so I can anneal my case mouths consistently. I am also having Lehigh defense make me a 1085 gr all copper extreme defender for use on big game (eventually) which is going to be interesting to say the least on both ends. I am so ready to touch this off it hurts!

    Here are a few pictures of the gun and a dummy round loaded with a 600 gr fury slug. I will be sure to update this thread and post up my first time firing it as well as other folks giving it a shot(should be interesting, I'm 5'5" 145lbs).

    Click image for larger version. 

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  2. #2
    Boolit Mold
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    Wow.

    (Check calendar. Not April 1st)

    Cool.

  3. #3
    Boolit Master



    skeettx's Avatar
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    Interesting
    Where will the gun be shot
    Will you sell tickets
    Thanks
    Mike
    NRA Benefactor 2004 USAF RET 1971-95

  4. #4
    Boolit Buddy
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    Lol from rough calculations, if the gun stays at its current weight, it'll recoil with around 177 lbs of energy roughly. That's definitely a lot. I'm used to heavy recoil (hot 45-70, 300 wm, 338 wm, 458 lott ect.) But this is definitely in a different league. I plan to get enough weight to balance the gun, if it's still too much to handle it'll get a brake

  5. #5
    Boolit Master
    fiberoptik's Avatar
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    Put the but against the target and kill it with the recoil!


    Sent from my iPhone using Tapatalk

  6. #6
    Boolit Master

    Winger Ed.'s Avatar
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    Cool project.
    I wonder how it would do with Black Powder.
    It wasn't playing the blame game, finding fault, and complaining about every little thing that made America great.
    It was God, guns, and guts.


    Never pick a fight with old people.
    If they don't think they can win it: They'll just kill you.

  7. #7
    Boolit Master
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    I guess if I feel a need to ask why, then I won’t understand....
    Interesting how varied our interests are, current thread on 22ladybug all the way to this portable mountain howertizer!!! Will be watching both threads.
    “You don’t practice until you get it right. You practice until you can’t get it wrong.” Jason Elam, All-Pro kicker, Denver Broncos

  8. #8
    Boolit Buddy
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    Hmm idk how it would do with black powder. As for "why", it's pretty simple "because I can" comes to mind lol I have always had a love for big bores and I always wanted a 700 nitro Express but could never afford one. Lol essentially it is a poor man's 700 nitro

  9. #9
    Boolit Master
    troyboy's Avatar
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    Glad you started this thread. This has been on my radar since the inception. Hopefully one day sooner then later, I'll follow your lead.
    "It is better to die on your feet than to live on your knees" Looking for an RCBS Ammomaster and H&R shotgun barrels regardless of condition

  10. #10

  11. #11
    Banned



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    Ed was well north of 15,000 ft lbs and possibly much higher than that.
    I remember him shooting a pistol grip shotgun that checked In around 10,000 ft lbs
    There is plenty of power to be had.

  12. #12
    Boolit Master
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    Please ! provide video !! It's looks to be very cool.

  13. #13
    Boolit Buddy
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    Quote Originally Posted by jmort View Post
    Ed was well north of 15,000 ft lbs and possibly much higher than that.
    I remember him shooting a pistol grip shotgun that checked In around 10,000 ft lbs
    There is plenty of power to be had.
    He certainly was! He used a heavy barreled savage bolt action though, which could handle a substantial amount of pressure... they also used 3.85" long brass that they made from 50 BMG brass. The H&R cannot handle that mega load however. I think it can do about 10,000 ft-lbs with a sketchy load if memory serves correct, could be wrong though. If I can get 8k ft-lbs I'll be a happy man.

  14. #14
    Boolit Buddy
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    Quote Originally Posted by troyboy View Post
    Glad you started this thread. This has been on my radar since the inception. Hopefully one day sooner then later, I'll follow your lead.

    You should do it! Once this is done and over with I'm gonna do a 20 gauge version with a bolt action

  15. #15
    Boolit Master jmorris's Avatar
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    My 50 BMG has a brake and weighs over 20 lbs, be sure to post videos...

  16. #16
    Frosted Boolits

    IllinoisCoyoteHunter's Avatar
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    Cool project. Do you have a print with dimensions for those turned brass cases? Thanks
    My Feedback : http://castboolits.gunloads.com/show...iscoyotehunter

    An armed society is a polite society.

    the BB knows

  17. #17
    Boolit Buddy
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    Quote Originally Posted by IllinoisCoyoteHunter View Post
    Cool project. Do you have a print with dimensions for those turned brass cases? Thanks
    Here are the dimensions I got today to send to CH4D. It's a rough sketch and I didn't have the legend drawn yet. If you want anything specific
    Let me know and I'll do my best to get it.
    Click image for larger version. 

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  18. #18
    Boolit Master BNE's Avatar
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    Ohhh My. I'm kinda jealous! Post a Video!!
    I'm a Happy Clinger.

  19. #19
    Subscribed!

  20. #20
    Frosted Boolits

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    Thanks!
    My Feedback : http://castboolits.gunloads.com/show...iscoyotehunter

    An armed society is a polite society.

    the BB knows

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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