.22 Eargesplitten Loudenboomer

Try as they will, other cartridges will never be this cool:

The wiki page – HERE

A picture for comparison:



Solomon May 10, 2010 at 06:10 pm

Oh that is just pure AWESOME! I wonder what would happen if you placed a flechette instead of a 22 cal bullet? It should keep some awesome ballistics for a very, very good range.

Wild T September 18, 2016 at 09:41 pm

Nothing very good, I’d imagine. Flechettes are terribly easy to disturb in-flight due to their cross section. If one moved at that speed through any kind of loose cover it’d carry on moving all over the place.

Steve May 10, 2010 at 06:28 pm

I think the way it works is you point the bullet away from your target and loosely hold the rifle as you pull the trigger. The rifle will fly out of your hands and incapacitate your target.

Something like that.

Zachg56 May 10, 2010 at 06:43 pm

that cracks me up so much

Linoge May 10, 2010 at 08:38 pm

Wow. Just…. wow. Imagine saboting a .17 Fireball out of that….

Mike May 10, 2010 at 09:46 pm

I imagine barrel life is about 3-5 rounds? Maybe they have to have a sequential series of progressively larger bullets as the bore is worn away (a’la the Paris gun).

ZerCool May 11, 2010 at 08:29 am

The Wiki info is great … 50gr bullet in front of 105gr of powder for 4600fps.

Or you could just use, say, a .220 Swift… same bullet weight at 3900fps … but whatever makes ya happy!

anon February 19, 2011 at 10:37 am

the whole point was to break a world record of 5,000 FPS

the .22 Eargesplitten Loudenboomer, by it’s very name, should tell that it was never going to be a serious cartridge beyond the novelty of slapping a .22 on a .375

Mark May 11, 2010 at 10:49 am


*rolls eyes* Everything you learned about ballistics was in a movie theater, right?

flechettes are failures.

Phil May 11, 2010 at 01:40 pm

4600 FPS = 3136 MPH

Geodkyt May 11, 2010 at 04:11 pm

Mark —

Now, be nice. Flechettes aren’t a total failure. You pack a couple hundred of them into an atrillery or tank main gun round, and they do just fine. {grin}

Drang May 11, 2010 at 05:41 pm

On the 1911TechTalk Yahoo! list we were speculating about a .50 BMG necked down to .22, but the List owner, Geoff, came back with (IIRC) a 25mm necked down the phonograph needle.

Assuming you can even find one these days… (Bonus! diamond tip!)

Josh May 11, 2010 at 06:11 pm

What would be the point? It seems to me that the only point of this cartridge was to try to set a velocity record. In the end you still have an extremely light bullet (so low energy) with a low ballistic coefficient (so it loses velocity, and trajectory, quickly). There’s probably a good reason that cartridges like this one, or like a .50 BMG necked to .22, don’t exist in the mainstream – they’re pretty pointless, except as interesting curiosities. Bullet energy may increase with the square of velocity, but that means that the force of air resistance does also. There are much better bullets, with higher ballistic coefficients, than an ultra-high velocity .22 that have a flatter trajectory and higher energy at long ranges – put the numbers for this round into a ballistic calculator and it’s not that impressive at long distance; you could never make a shot like the ones recently made in AFG with .338 Lapua. And a .378 case necked down to fire a .22 isn’t going to produce any less recoil than the original round, right? It’s still (if it has the same powder load) putting the same amount of energy out the barrel (theoretically) and must have the same opposite recoil reaction, right? (I’m no physicist, but it would seem that way to me.)

Adam May 12, 2010 at 02:33 am

Man your a party pooper aren’t you….

Josh May 12, 2010 at 09:26 am


George Steele February 27, 2016 at 08:24 am

Just tryin’ to make sure the squirrel doesn’t get up for a second shot . . .

Dave March 21, 2017 at 07:29 pm

well it wouldn’t recoil quite as hard because you have to take into account the weight of the bullet is what creates alot of the “negative energy” (heavier bullet=heavier recoil, lighter bullet=lighter recoil)

Jeremiah May 11, 2010 at 08:50 pm

C’mon, 120mm Rheinmetall tank cannon round with a sabot — that’s already 5200fps. Sabot diameter is about 25mm.

Necked down to .224? :)

Geodkyt May 12, 2010 at 08:58 am

Heh. The bullet would weigh less than the sabot — probably stick to it instead of seperating cleanly. {snicker}

Grayson May 12, 2010 at 03:34 pm

It’s called the .22 Eargesplitten Loudenboomer, only because the “.22 Holy Thundering Shit!!” and the “.22 BlowUpYerGun”
apparently were not descriptive enough, and the “.22 What The F**K Were You Thinking?!” was considered to be just a little bit off color for the time.


I’m sorry, was that in questionable taste?


Mike May 22, 2013 at 08:59 am

It most likely detonates mid air a few hundred yards out from increased friction!

brian December 2, 2013 at 09:08 am

dear decapatation device

Eric February 7, 2015 at 09:02 am

Can anyone tell me if the photo is in the public domain or free to use. I’d like to add it to the Wikipedia article.

WhammyKbalmmy February 1, 2016 at 04:55 pm

That’s probably more dangerous for the shooter than the target.
Btw, somebody should neck down an 8cm FlaK to .22

George Steele February 27, 2016 at 08:27 am

Dual purpose: first you kill the squirrel, then you cook it with the flaming barrel . . .

James September 27, 2016 at 08:47 am

Completely worthless. Unless its a solid bullet, the bullet with destroy itself leaving the barrel.

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