SSK Industries Rifle Chambered in 950 JDJ (a.k.a., “Fat Mac”)

The .950 JDJ Rifle - "Fat Mac"

In the video below, Rock Island Auctions shoots the 950 JDJ Rifle. Why? Money! And, of course, because they can. And just so you know, “this behemoth was developed by the cartridge’s namesake and president of SSK Industries, J.D. Jones. It is 20x110mm Vulcan Cannon cartridge shortened and then necked down to .950 caliber. It’s so large it had to receive an ATF ‘Sporting Use Exception’ from the ATF to avoid be classified as a Destructive Device. Only three rifles were made by SSK to fire this mammoth round.”

Yes! Perfect for offing a wooly mammoth! If only our ancestors hadn’t driven them all over cliffs and into killing pits….


  1. avatar joetast says:

    I wish they would have found the .950 slug.

  2. avatar tmm says:

    Why? Why not?

  3. avatar Defens says:

    Heh! why not load the projectile into a sabot, and have the fledermaus dipsticks shoot it out of a 12 gauge?

    1. avatar Geoff PR says:

      “Heh! why not load the projectile into a sabot, and have the fledermaus dipsticks shoot it out of a 12 gauge?”

      Because 12 gauge. is something like 0.729 inches in diameter, and .950 JDJ is 0.950 inches in diameter?

      1. avatar joetast says:

        Lol, he didn’t say it would work. He just wants tatorfeildmouse to try .

        1. avatar Geoff PR says:

          If you are unable to strike the primer with the firing pin of gun in question, it doesn’t qualify as a ‘try’.

          Hence, why we see “shoot .223 from a 12 gauge” and never “shoot 12 gauge from a standard AR pattern rifle” on YouTube.

          (Nice job trolling that idiot earlier in the day, BTW…)

        2. avatar Defens says:

          Just beat it into the chamber with a sledge, and use a nail and hammer on the primer. Can I claim that I thought it was the 0.950mm JDJ as an excuse?

  4. avatar Hank says:

    Sounds great for if a sudden ice age happens.

  5. avatar Big Al says:

    Why all the uproar??? Just buy a 50BMG!

    1. avatar Ian says:

      Because when you need to kill the guy in the building behind the building in front of you .50BMG just won’t cut it.

    2. avatar Ian says:

      Or when you don’t have time to process your deer into hamburger so you use this.

  6. avatar Leighton Cavendish says:

    $50 a round? LOL

  7. avatar Leighton Cavendish says:

    Somebody needs to do something with a 30mm shell now…

  8. avatar Leighton Cavendish says:

    Where’s the pistol version? LMAO

    1. avatar Joe in MN says:

      Embedded in the ceiling above the first guy who tried to shoot it.

  9. avatar Tom in Oregon says:

    I’ve had the urge to shoot a 4 bore since I first read about them.
    There is something magic about that cartridge.
    I’ll have to keep an eye on it during the auction to see what it sells for. Maybe I’ll get lucky and know who buys it…

    1. avatar Chadwick says:

      Should be able to narrow it down by which of your friends has their shoulder in a sling, an ear to ear grin, and no beer money.

  10. avatar Jerrick says:

    my åun тy Isåbêllå goт ån åшêsomê six monтh old BMш 6 Sêяiês Gяån Coupê Sêdån only fяom
    påят- тimê off å compuтêя..>>>>>>>>>>>>>

  11. avatar Sad Trombone says:

    M-61, Vulcan round is 20mm x 102mm. 🤔

    1. avatar Snatchums says:

      Yeah, the article says shortened and necked down case, it’s actually necked UP from 20mm.

      Oh and the bullet has the kinetic energy of a 2800lb vehicle going 20mph, just to put it into perspective. So that old movie trope about blasting the bad guy across the room, could actually happen with this round!

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