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 I would like to see a 9mm necked down to .22.........Is this possible.
jeremyt  [Team Member]
2/29/2012 9:55:44 PM
I've been thinking about this for sometime but I don't know the possibilities.

I think ( in my little world ) it would be fun to have a replacement barrel for say a Glock 9mm that was chambered in a wildcat cartridge where I could form 9mm shells to .22cal.

Think similar to a .22 hornet....

I know it wouldn't be a cheap shooter but in my opinion would be a fun small game round.
Plus (to me) it would be neat to swap barrels on a G34 and take it to the woods.

So my question for the experts here : Is this do-able?

I'm not saying I'm going to run out and buy a bunch of CNC equipment, just wondering if it's even possible that someday, some company will make my little daydream a reality..
Skillshot  [Team Member]
2/29/2012 9:56:31 PM
Been done befo
USMC88-93  [Team Member]
2/29/2012 10:00:35 PM
In this case it is a 10mm case necked down .224 Boz

http://en.wikipedia.org/wiki/.224_Boz

or 9mm necked down to .223 in the .22 TCM

http://www.thetruthaboutguns.com/2011/11/foghorn/ria-introduces-first-production-22-tcm-firearm/
jestertoo  [Team Member]
2/29/2012 10:05:16 PM
6.5x25 cbj did that. Think they made a 224 version as well.
grendelbane  [Member]
2/29/2012 10:07:05 PM
Rock Island Armory is selling such a beast.

Wildcats have also been done. The .224 Zipperer is the 9x23mm Winchester case necked down to .22 caliber.

FN offers their 5.7 x 28 mm. This cartridge is too long for most pistol frames, but their pistol handles it nicely.

So you can get what you want, if you are willing to pay for it.
jeremyt  [Team Member]
2/29/2012 10:20:45 PM
Thanks for the replies but I should rephrase.

Would it be possible to make the JUST barrel swap with a standard Glock 9mm pistol and have such a round that function properly?


I've seen the 5.7 pistols, but I'd like to have a 2-in-1 gun.

Similar to the 5.56 & .458 socom
backbencher  [Team Member]
3/1/2012 12:31:26 AM
.22" TCM bbl then, may have to use a lighter recoil spring. Let us know where you find the bbl & the reamer.

Gig 'em,

backbencher
Chris_1522  [Team Member]
3/1/2012 8:03:21 AM
Originally Posted By jeremyt:
Thanks for the replies but I should rephrase.

Would it be possible to make the JUST barrel swap with a standard Glock 9mm pistol and have such a round that function properly?


I've seen the 5.7 pistols, but I'd like to have a 2-in-1 gun.

Similar to the 5.56 & .458 socom


Whatever the round Rock Island / Armscorp is pushing now is just that. Except it's a 1911. Would expect a Glock barrel to be made, though.
Slacker  [Member]
3/1/2012 8:33:06 AM
Found on range. .357mag case necked down to 6mm or close to it.
Chris_1522  [Team Member]
3/1/2012 8:41:02 AM
That is REALLY bizzare. Doesn't even have a neck.
Hawgleg44  [Team Member]
3/1/2012 9:10:19 AM
Originally Posted By Slacker:
Found on range. .357mag case necked down to 6mm or close to it.
http://personalpages.tds.net/~eflanagin/mysteryammo.JPG


It looks like they formed it with a pair of pliars!

ClemY  [Member]
3/1/2012 9:58:37 AM
Just what I need. A dinky, hard to reload cartridge that pitches its hand made brass into the weeds. Marvelous.
nhsport  [Team Member]
3/1/2012 10:16:22 AM
Originally Posted By Slacker:
Found on range. .357mag case necked down to 6mm or close to it.
http://personalpages.tds.net/~eflanagin/mysteryammo.JPG


Wow-I suspect this is for a thompson contender or some other single shot
I would call that the 357 no-neck
nhsport  [Team Member]
3/1/2012 10:27:14 AM
Originally Posted By jeremyt:
Thanks for the replies but I should rephrase.

Would it be possible to make the JUST barrel swap with a standard Glock 9mm pistol and have such a round that function properly?


I've seen the 5.7 pistols, but I'd like to have a 2-in-1 gun.

Similar to the 5.56 & .458 socom


Anything is possible but I am thinking that by the time you form a neck you won't have much case capicity
Keep in mind that because you are still trying to operate the pistol (move the slide and all) there is going to be a fairly narrow window of pressure where
it all works with little flexability in bullet weights and a dificult propisition to handload for. Then there is the whole set of problems in handloading a bottleneck pistol cartridge.

From a comercial or buisness standpoint it would be a tough go as ammo would likely be expensive which gives the whole deal two strikes right at the start.

By the time you get done (with the barrel and all) you would be 2/3 the way in cost to a complete gun

Top_Secret  [Team Member]
3/1/2012 12:28:37 PM
Probably would be ruled as AP by ATF.

9mm Sabot anyone?
backbencher  [Team Member]
3/1/2012 12:42:15 PM
Originally Posted By Slacker:
Found on range. .357mag case necked down to 6mm or close to it.
http://personalpages.tds.net/~eflanagin/mysteryammo.JPG


http://en.wikipedia.org/wiki/.256_Winchester_Magnum

Perhaps. Universal? made a M1 carbine clone in it.

Gig 'em,

backbencher
TeeRex  [Team Member]
3/1/2012 12:47:11 PM
.357 sig has been necked down to 17 too. Wildcatters have done just about anything that can be done.
Phoenix_III  [Member]
3/1/2012 2:18:48 PM
Just get a .22lr conversion?
poorman  [Member]
3/1/2012 3:16:29 PM
That sounds kind of like the 5.45x18 round that the Soviet PSM pistol fires.
jeremyt  [Team Member]
3/1/2012 5:19:40 PM

Originally Posted By nhsport:
Originally Posted By jeremyt:
Thanks for the replies but I should rephrase.

Would it be possible to make the JUST barrel swap with a standard Glock 9mm pistol and have such a round that function properly?


I've seen the 5.7 pistols, but I'd like to have a 2-in-1 gun.

Similar to the 5.56 & .458 socom


Anything is possible but I am thinking that by the time you form a neck you won't have much case capicity
Keep in mind that because you are still trying to operate the pistol (move the slide and all) there is going to be a fairly narrow window of pressure where
it all works with little flexability in bullet weights and a dificult propisition to handload for. Then there is the whole set of problems in handloading a bottleneck pistol cartridge.

From a comercial or buisness standpoint it would be a tough go as ammo would likely be expensive which gives the whole deal two strikes right at the start.

By the time you get done (with the barrel and all) you would be 2/3 the way in cost to a complete gun

Very good points.

That's close to what I expected. For some reason I'm always drawn to the oddities and impractical type stuff.

Thanks for all the replies.

GLHX2112  [Team Member]
3/2/2012 12:28:02 AM
Originally Posted By nhsport:
Originally Posted By Slacker:
Found on range. .357mag case necked down to 6mm or close to it.
http://personalpages.tds.net/~eflanagin/mysteryammo.JPG


Wow-I suspect this is for a thompson contender or some other single shot
I would call that the 357 no-neck


I'd call it the: "Hey, next time we do some reloading, lets mess with some different cases, neck them down to something silly, put a bullet in it, and then leave a few laying around the range to mess with people"................hehehe
scottedward58  [Team Member]
3/3/2012 9:45:12 AM
Originally Posted By Top_Secret:
Probably would be ruled as AP by ATF.

9mm Sabot anyone?


.357 diameter sabot that will take .311 bullets. The length will need to be cut down to work and it is .002 to big for 9mm but since it is plastic that .002 won't matter if you can get it in a case. Also I bet it squeezes down and lets you use a .308 bullet.
http://www.mmpsabots.com/grey1.html
MagnusM4  [Team Member]
3/3/2012 11:33:57 AM
Originally Posted By backbencher:
Originally Posted By Slacker:
Found on range. .357mag case necked down to 6mm or close to it.
http://personalpages.tds.net/~eflanagin/mysteryammo.JPG


http://en.wikipedia.org/wiki/.256_Winchester_Magnum

Perhaps. Universal? made a M1 carbine clone in it.

Gig 'em,

backbencher


Doesn't look the same.

Joenavy85  [Team Member]
4/13/2012 9:34:20 PM
What you are looking for, right here

This would be it. Armscor has a 1911 chambered for it.
jestertoo  [Team Member]
4/14/2012 10:39:42 AM
22 TCM (as above)

http://www.thetruthaboutguns.com/2011/11/foghorn/ria-introduces-first-production-22-tcm-firearm/

TheJeffster  [Member]
4/14/2012 12:27:51 PM


So its a .223 being pushed out of a 5 inch barrel by a 9mm casing? I wonder what kind of velocity you would get out of it.
JohnRippert  [Member]
4/14/2012 3:06:38 PM
Originally Posted By TheJeffster:


So its a .223 being pushed out of a 5 inch barrel by a 9mm casing? I wonder what kind of velocity you would get out of it.


According to one of the above links, 2100 fps.
FortyFiveAutomatic  [Team Member]
4/14/2012 3:10:22 PM
.22 Eargesplitten Loudenboomer



Not 9mm, but freaking ridonkulous.
Stryfe  [Team Member]
4/14/2012 5:29:40 PM
When I took my CPL renewel class, we had to shoot, but they had the indoor range tied up for the 1st timers.
For us, we had a backroom, and the instructor had a couple of Glocks with a conversion kit and funny cartridges.
The cartridges fit in the normal 9mm magazine, but they were severely necked down. I'm not sure what they were made of, but they looked like they were designed to run off of primers only, and still cycle the slide. The cases were reloadable, I don't think they were brass, and it almost looked like they telescoped as they were fired.
It was subcaliber, and low power, we were shooting in a cynderblock room, with no significant backstop.

I don't know what it was called, and I can never seem to google it up.
Bgu301  [Team Member]
4/15/2012 6:40:48 AM
Originally Posted By FortyFiveAutomatic:
.22 Eargesplitten Loudenboomer

http://outdoor-chat.959241.n3.nabble.com/file/n1739932/Real17power.jpg

Not 9mm, but freaking ridonkulous.


scottedward58  [Team Member]
4/15/2012 6:53:48 AM
Originally Posted By Stryfe:
When I took my CPL renewel class, we had to shoot, but they had the indoor range tied up for the 1st timers.
For us, we had a backroom, and the instructor had a couple of Glocks with a conversion kit and funny cartridges.
The cartridges fit in the normal 9mm magazine, but they were severely necked down. I'm not sure what they were made of, but they looked like they were designed to run off of primers only, and still cycle the slide. The cases were reloadable, I don't think they were brass, and it almost looked like they telescoped as they were fired.
It was subcaliber, and low power, we were shooting in a cynderblock room, with no significant backstop.

I don't know what it was called, and I can never seem to google it up.


Simunitions?

Stryfe  [Team Member]
4/16/2012 8:08:24 AM
Originally Posted By scottedward58:
Originally Posted By Stryfe:
When I took my CPL renewel class, we had to shoot, but they had the indoor range tied up for the 1st timers.
For us, we had a backroom, and the instructor had a couple of Glocks with a conversion kit and funny cartridges.
The cartridges fit in the normal 9mm magazine, but they were severely necked down. I'm not sure what they were made of, but they looked like they were designed to run off of primers only, and still cycle the slide. The cases were reloadable, I don't think they were brass, and it almost looked like they telescoped as they were fired.
It was subcaliber, and low power, we were shooting in a cynderblock room, with no significant backstop.

I don't know what it was called, and I can never seem to google it up.


Simunitions?

http://simunition.com/application/views/includes/images/contenu/products/fx_cartridges.png

No. I know about those. I should have mentioned in my first post. I did check their site to see if they had something like that. The stuff we used didnt have a bullet, but the proctile it did have was not something you wanted to get hit with. It looked like a bb with something like a plastic sabot.

Hawgleg44  [Team Member]
4/16/2012 12:53:03 PM
These maybe? Michael de Bethencourthighly recommends them for training. I personally don't own any, but I do use these in .38 spl and .44 spl/mag.
Stryfe  [Team Member]
4/16/2012 4:58:07 PM
Originally Posted By Hawgleg44:
These maybe? Michael de Bethencourthighly recommends them for training. I personally don't own any, but I do use these in .38 spl and .44 spl/mag.


Very much like that, but not identical.
They need to include MS paint in the editor.
GUNGUY148  [Team Member]
4/17/2012 10:54:43 PM
Tho a bit hard to find....22 rem jet s&w revolvers are quite fun
DakotaFAL  [Member]
4/22/2012 10:43:21 AM
Originally Posted By GLHX2112:
Originally Posted By nhsport:
Originally Posted By Slacker:
Found on range. .357mag case necked down to 6mm or close to it.
http://personalpages.tds.net/~eflanagin/mysteryammo.JPG


Wow-I suspect this is for a thompson contender or some other single shot
I would call that the 357 no-neck


I'd call it the: "Hey, next time we do some reloading, lets mess with some different cases, neck them down to something silly, put a bullet in it, and then leave a few laying around the range to mess with people"................hehehe
It's funner if you neck something up - like starting with a .223 and necking it up to .45 caliber Getting them to chamber reliably is an issue though...
DakotaFAL  [Member]
4/22/2012 10:45:41 AM
Originally Posted By Slacker:
Found on range. .357mag case necked down to 6mm or close to it.
http://personalpages.tds.net/~eflanagin/mysteryammo.JPG
I looks like the famous 6mm TNT (Triple Necked Terror).

the .204 TNT is more impressive though - it starts with the .50 Browning case.

DakotaFAL  [Member]
4/22/2012 10:47:34 AM
Originally Posted By FortyFiveAutomatic:
.22 Eargesplitten Loudenboomer

http://outdoor-chat.959241.n3.nabble.com/file/n1739932/Real17power.jpg

Not 9mm, but freaking ridonkulous.
It never caught on as throat erosion became a problem after about 7 rounds.

AN94NK  [Member]
4/22/2012 9:50:10 PM
Originally Posted By DakotaFAL:
Originally Posted By FortyFiveAutomatic:
.22 Eargesplitten Loudenboomer

http://outdoor-chat.959241.n3.nabble.com/file/n1739932/Real17power.jpg

Not 9mm, but freaking ridonkulous.
It never caught on as throat erosion became a problem after about 7 rounds.



Isnt those the rounds that when you shoot 2-3 rounds, the barrel get so hot that you cant hardly touch it without gloves on?
D-R  [Member]
5/4/2012 11:29:16 PM
Unfortunately, there is still no chambering equivalent to a 9mm necked down to .223. The 22 TCM could have been such a beast, but the OAL is that of the .38 Super, making conversions of standard 9mm arms impossible. Kind of dissapointing.