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7/12/2016 11:07:11 AM EDT
Someone with actual measurements and maybe even engineering skills:

How big of a round could be created to work "single stack" in a .308-size AR platform magazine?  Like the .50Beowulf et al does in regular ARs.

I know it would run afoul of DD laws (and probably common sense), but I'm curious.
7/12/2016 11:11:25 AM EDT
[#1]
I have no idea, but I think that a .308 case necked up to .50 would be neat.
7/12/2016 11:12:05 AM EDT
[#2]
You could probably neck something down and keep it .50 cal to avoid DD issues.

Edit:

Quoted:
I have no idea, but I think that a .308 case necked up to .50 would be neat.
View Quote


I think this would be cooler though if you weren't insisting on single stack in the magazine.
7/12/2016 11:16:51 AM EDT
[#3]
.500 Blackout?
7/12/2016 11:18:22 AM EDT
[#4]
Quote History
Quoted:
You could probably neck something down and keep it .50 cal to avoid DD issues.

Edit:



I think this would be cooler though if you weren't insisting on single stack in the magazine.
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Quote History
Quoted:
You could probably neck something down and keep it .50 cal to avoid DD issues.

Edit:

Quoted:
I have no idea, but I think that a .308 case necked up to .50 would be neat.


I think this would be cooler though if you weren't insisting on single stack in the magazine.


Yes a necked-up .308 would be cool.. and probably more useful than the .710 Dongelsaurus (or whatever) I'm thinking about.  But I'm still thinking about it.  Would 1,000gr bullet be possible?
7/12/2016 11:18:46 AM EDT
[#5]
Quote History
Quoted:
.500 Blackout?
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7/12/2016 11:19:08 AM EDT
[#6]
I know that 12 Ga shells will fit in a CETME mag single stack


so I guess the answer would be .730 AR-Nitro
7/12/2016 11:20:41 AM EDT
[#7]
Quote History
Quoted:
.500 Blackout?
View Quote

7/12/2016 11:21:52 AM EDT
[#8]
There is a 45 Raptor. I think that is the right mane. 308, necked out straight wall, loaded to 460 S&W loads.

If you could find one of the WSM uppers, I guess it could be necked up for a 50 projectile. 50A.E.?
I'd be happy with the 45. Lots of part. I think a barrel swap is the only gun mod. Feed lip mods on the magazine.
7/12/2016 11:23:52 AM EDT
[#9]
Rimless .50-140 sharps?
7/12/2016 11:25:16 AM EDT
[#10]
Quote History
Quoted:


Yes a necked-up .308 would be cool.. and probably more useful than the .710 Dongelsaurus (or whatever) I'm thinking about.  But I'm still thinking about it.  Would 1,000gr bullet be possible?
View Quote View All Quotes
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Quote History
Quoted:
Quoted:
You could probably neck something down and keep it .50 cal to avoid DD issues.

Edit:

Quoted:
I have no idea, but I think that a .308 case necked up to .50 would be neat.


I think this would be cooler though if you weren't insisting on single stack in the magazine.


Yes a necked-up .308 would be cool.. and probably more useful than the .710 Dongelsaurus (or whatever) I'm thinking about.  But I'm still thinking about it.  Would 1,000gr bullet be possible?

donglesaurus got a true laugh out loud
7/12/2016 11:27:06 AM EDT
[#11]
Quote History
Quoted:
There is a 45 Raptor. I think that is the right mane. 308, necked out straight wall, loaded to 460 S&W loads.

If you could find one of the WSM uppers, I guess it could be necked up for a 50 projectile. 50A.E.?
I'd be happy with the 45. Lots of part. I think a barrel swap is the only gun mod. Feed lip mods on the magazine.
View Quote

460 makes more sense out of a rifle, it'd be sweet as hell out of a 10-12" barrel.
7/12/2016 11:28:50 AM EDT
[#12]
.500 phantom

7/12/2016 11:28:56 AM EDT
[#13]
.510 Whisper? Uses .338LM brass.
7/12/2016 11:28:59 AM EDT
[#14]
Why single stack?  A bigger 45-70ish with mo' powa and faster bullits.  Yo.
7/12/2016 11:32:28 AM EDT
[#15]

Quote History




 



Some of those are silly looking.
7/12/2016 11:37:57 AM EDT
[#16]

500 Phantom. and. 510 Whisper are a couple that come to mind...

we've built several 458 and 50 uppers using double or single stack arrangements on the LR/SR chassis....50 is easier just to stay within the DD limits...

In my opinion the challenging ones are built on the defunct 30 Remington RAR chassis...a 458 using Rigby brass or 50 using Jeffery brass...

7/12/2016 11:38:39 AM EDT
[#17]
I think it would be cool to see a company build AR10's that use the Winchester Short Magnum family of cartridges.  These short fat rounds would definitely need to be single stack in the mag.  A .300WSM hunting AR that didnt weigh 12 pounds empty would awesome.  

7/12/2016 11:41:01 AM EDT
[#18]
Makes me wish someone would build a 458 win mag AR
7/12/2016 11:59:39 AM EDT
[#19]


Quote History
Quoted:



Makes me wish someone would build a 458 win mag AR
View Quote
http://www.petersenshunting.com/gear-accessories/nemo-omen-458/




 
 
7/12/2016 12:04:52 PM EDT
[#20]
Quote History
Quoted:
I think it would be cool to see a company build AR10's that use the Winchester Short Magnum family of cartridges.  These short fat rounds would definitely need to be single stack in the mag.  A .300WSM hunting AR that didnt weigh 12 pounds empty would awesome.  

https://media.midwayusa.com/productimages/880x660/Primary/483/483445.jpg
View Quote



Needs a new bolt/extractor design(just beefier), the ones that exist break extractors left and right. ETA: Remington's SAUM would work a little better here as the case is shorter
7/12/2016 12:06:30 PM EDT
[#21]
.510 Beck
7/12/2016 12:09:22 PM EDT
[#22]
Quote History
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Quote History
Quoted:
Quoted:
Makes me wish someone would build a 458 win mag AR
http://www.petersenshunting.com/gear-accessories/nemo-omen-458/
   


That is relavant to my interests sir.  I would seriously consider retiring my model 70 if that can be tuned for reliable operation.
7/12/2016 12:09:44 PM EDT
[#23]
Quote History
Quoted:



Needs a new bolt/extractor design(just beefier), the ones that exist break extractors left and right. ETA: Remington's SAUM would work a little better here as the case is shorter
View Quote View All Quotes
View All Quotes
Quote History
Quoted:
Quoted:
I think it would be cool to see a company build AR10's that use the Winchester Short Magnum family of cartridges.  These short fat rounds would definitely need to be single stack in the mag.  A .300WSM hunting AR that didnt weigh 12 pounds empty would awesome.  

https://media.midwayusa.com/productimages/880x660/Primary/483/483445.jpg



Needs a new bolt/extractor design(just beefier), the ones that exist break extractors left and right. ETA: Remington's SAUM would work a little better here as the case is shorter


Are Remington's SAUM cartridges still alive?  Cant remember the last time I saw a rifle chambered for one.  I always thought the rifles built by Olympic Arms I think that were chambered in winchesters super short mag rounds were pretty cool.  But sadly both those rifles and those WSSM cartridges never really caught on.  Of course I also thought remingtons .30 Remington AR was a really neat cartridge, but like most good ideas, big green fucked it up and didnt support it long enough to get it off the ground.
7/12/2016 12:13:22 PM EDT
[#24]
Accuracy Systems makes .450 Marlin uppers, and I'm sure other builders could pull that off as well. The .450 is basically a .45-70 with a little beefier case and has a belt like a .300 Win Mag.
7/12/2016 12:14:07 PM EDT
[#25]
Quoted:
Someone with actual measurements and maybe even engineering skills:

How big of a round could be created to work "single stack" in a .308-size AR platform magazine?  Like the .50Beowulf et al does in regular ARs.

I know it would run afoul of DD laws (and probably common sense), but I'm curious.
View Quote


I've thought about this, too.  SSK Industries got a DD exemption for the 14.5 JDJ cartridge, and they're not a big company.  They've developed some other >.50 wildcats, too.  They'd be the ones to do it.
7/12/2016 12:35:09 PM EDT
[#26]
Fuck it. .500 Blackout with an optional Gyrojet round....
7/12/2016 12:38:46 PM EDT
[#27]
Quote History
Quoted:
Why single stack?  A bigger 45-70ish with mo' powa and faster bullits.  Yo.
View Quote


Because is bigger is better, that cartoonishly big is cartoonishly good.



How close could we get to this in an AR10-pattern gun?  

7/12/2016 12:43:56 PM EDT
[#28]
Quote History
Quoted:
I think it would be cool to see a company build AR10's that use the Winchester Short Magnum family of cartridges.  These short fat rounds would definitely need to be single stack in the mag.  A .300WSM hunting AR that didnt weigh 12 pounds empty would awesome.(pic removed for brevity)
View Quote


That's even more interesting to me than a big ol boolit.

Has anyone done this with an AR15?  Like a .458 SOCOM but with a tiny bullet?
7/12/2016 12:49:08 PM EDT
[#29]
Quote History
Quoted:


That's even more interesting to me than a big ol boolit.

Has anyone done this with an AR15?  Like a .458 SOCOM but with a tiny bullet?
View Quote View All Quotes
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Quote History
Quoted:
Quoted:
I think it would be cool to see a company build AR10's that use the Winchester Short Magnum family of cartridges.  These short fat rounds would definitely need to be single stack in the mag.  A .300WSM hunting AR that didnt weigh 12 pounds empty would awesome.(pic removed for brevity)


That's even more interesting to me than a big ol boolit.

Has anyone done this with an AR15?  Like a .458 SOCOM but with a tiny bullet?

Remington did with the .30 Remington AR.  Olympic arms was making uppers in .243/.223/.25 WSSM for a while.
7/12/2016 12:52:12 PM EDT
[#30]
Friend built a .416 using a necked down 458 socom case. Pretty neat subsonic with the heavy 416 cheytac pills
7/12/2016 12:55:52 PM EDT
[#31]
just making a 308 straight walled you'd get something like a .45. for single stack you'de be in the .75 range. so maybe you could build a 20mm
7/12/2016 1:22:43 PM EDT
[#32]
300 rsaum or wsm necked top 458-510

I want a 300wsm case with 458 rounds because that will fit in the mag and chamber
7/12/2016 1:25:34 PM EDT
[#33]
Quote History
Quoted:
.510 Beck
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Dat Geiselle 7.62 handguard

7/12/2016 1:58:38 PM EDT
[#34]
Quote History
Quoted:
.510 Beck
View Quote



I want that brass, neck it to 308/338 and boom! Short mag AR
7/12/2016 2:05:16 PM EDT
[#35]
Quote History
Quoted:
.500 Blackout?
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Real Men of Genius shit, right there.  
7/12/2016 2:43:59 PM EDT
[#36]
It would be real close, but I think you could just fit a 20mm straight wall case with a rebated rim in the mag.   I didn't look if it would fit in the upper though, most likely it won't.  .700 would be a nice number to shoot for.
7/12/2016 2:46:41 PM EDT
[#37]
Quote History
Quoted:
I have no idea, but I think that a .308 case necked up to .50 would be neat.
View Quote



Rim size is the same as 45 acp
7/12/2016 2:50:32 PM EDT
[#38]
make the case big enough to fit singly in an AR10 mag say .700 wide and neck it down to .450
7/12/2016 2:52:18 PM EDT
[#39]
Quote History
Quoted:
make the case big enough to fit singly in an AR10 mag say .700 wide and neck it down to .450
View Quote


One step at a time... big and slow leads to smaller (but still pretty damn big) and fast.
7/12/2016 2:57:12 PM EDT
[#40]
you could shorten a .300 savage to fit into the AR10 and then probably run Double stack
7/12/2016 3:28:07 PM EDT
[#41]
Quote History
Quoted:
you could shorten a .300 savage to fit into the AR10 and then probably run Double stack
View Quote


.300 savage is shorter than .308 winchester already.  The .308 design was based on the .300 savage, but the neck on the .308 win is lengthened vs the .300 savage
7/12/2016 3:36:49 PM EDT
[#42]
Quote History
Quoted:


.300 savage is shorter than .308 winchester already.  The .308 design was based on the .300 savage, but the neck on the .308 win is lengthened vs the .300 savage
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Quoted:
Quoted:
you could shorten a .300 savage to fit into the AR10 and then probably run Double stack


.300 savage is shorter than .308 winchester already.  The .308 design was based on the .300 savage, but the neck on the .308 win is lengthened vs the .300 savage


Oh dang, I had it backwards. That would have worked better if I had gotten that right...
7/12/2016 3:43:19 PM EDT
[#43]
My new experimental cartridge

.499 Sexual Tyrannosaurus.

7/12/2016 4:01:58 PM EDT
[#44]
A straight case based on Winchester Short Magnum or Remington Short Action Ultra Magnum brass that head spaced on the neck like .45 RAPTOR would be cool.  You might even be able to do a .50 caliber cartridge with a very small neck.  We could call it the .51 RAPER
7/12/2016 10:00:26 PM EDT
[#45]
The limiting factor here is going to be the inner diameter of the barrel extension. You would have to do something analogous to 458 Socom AR 50 Beowulf with the rebated rim if you were going to do something that had a case diameter that would fit in the 308 magazines single stack. The projectile size could be kept to 50 cal to avoid registry as a DD
7/12/2016 10:48:41 PM EDT
[#46]
The legal definiton of a destructive device is actual quite interesting. It is commonly accepted that over 1/2 inch is a DD, unless the ATF grants an exception, or is a antique elephant gun type cartridge, but this is actually not the case.  Any rifle could be made over 1/2 inch and would not be a DD.  Pay attention to the last sentence.

(2) Any weapon by whatever name known which will, or which may be readily converted to, expel a projectile by the action of an explosive or other propellant, the barrel or barrels of which have a bore of more than one-half inch in diameter (.50 inches or 12.7 mm), except a shotgun or shotgun shell which the Secretary finds is generally recognized as particularly suitable for sporting purposes; and
(3) Any combination of parts either designed or intended for use in converting any device into a destructive device as defined in subparagraphs (1) and (2) and from which a destructive device may be readily assembled.
The term destructive device shall not include any device which is neither designed nor redesigned for use as a weapon; any device, although originally designed for use as a weapon, which is redesigned for use as a signaling, pyrotechnic, line throwing, safety or similar device; surplus ordnance sold, loaned or given by the Secretary of the Army, pursuant to the provisions of section 4684(2), 4685, or 4686 of Title 10 of the United States Code; or any other device the Secretary finds is not likely to be used as a weapon, or is an antique or is a rifle which the owner intends to use solely for sporting purposes
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If it is an other device such as a smooth bore, it requires a determination from the ATF.  A large bore rifle does not require any determination or exemption.
7/12/2016 11:00:03 PM EDT
[#47]
Quote History
Quoted:
I think it would be cool to see a company build AR10's that use the Winchester Short Magnum family of cartridges.  These short fat rounds would definitely need to be single stack in the mag.  A .300WSM hunting AR that didnt weigh 12 pounds empty would awesome.  

https://media.midwayusa.com/productimages/880x660/Primary/483/483445.jpg
View Quote

DPMS used to offer their LR rifles in all the WSM offerings.
7/12/2016 11:31:56 PM EDT
[#48]
Quote History
Quoted:


One step at a time... big and slow leads to smaller (but still pretty damn big) and fast.
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Quoted:
Quoted:
make the case big enough to fit singly in an AR10 mag say .700 wide and neck it down to .450


One step at a time... big and slow leads to smaller (but still pretty damn big) and fast.

Yeah but that would be an awesome round
7/13/2016 12:12:41 AM EDT
[#49]
Quote History
Quoted:
I think it would be cool to see a company build AR10's that use the Winchester Short Magnum family of cartridges.  These short fat rounds would definitely need to be single stack in the mag.  A .300WSM hunting AR that didnt weigh 12 pounds empty would awesome.  

https://media.midwayusa.com/productimages/880x660/Primary/483/483445.jpg
View Quote

These guy make 'em, but they ain't cheap.
http://www.ar-10-rifles.com/index.php
7/13/2016 12:21:41 AM EDT
[#50]
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Quoted:
.510 Beck
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Awesome, been waiting for this for a long time!  Spotter rounds would be a blast!
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