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#1
09-01-2010, 7:27 AM
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Here's a list of AR-15 Calibers...WOW!!!
I was searching for what caliber options there were for AR-15's and came across this list...impressive. Anyone have some to add to the list, or add a similar list for AR-10 lower?
AR-15, without bolt modification .17 Remington .17/223 .20 Tactical .20 Practical .20 Vartag .204 Ruger .221 Fireball .222 Remington .222 Remington Magnum .223 Remington (5.56x45mm) .223 Remington Ackley Improved 6x45mm 6mm TCU 6x47mm 6mm Whisper .25x45mm 6.5mm Whisper 7mm Whisper 7mm TCU .300 Whisper (.300/221, .300 Fireball) .338 Whisper AR-15, with bolt modification 223 WSSM 5.45x39mm (.21 Genghis) 243 WSSM 6mm PPC 6mm WOA 6mm BR Remington 6mm Hagar 6.5mm PPC 6.5 WSSM 6.5 WOA 6.5mm Grendel 25 WSSM 6.8x43mm SPC .30 Herrett Rimless Tactical (6.8x43mm case trimmed to 41mm and necked up to .308; the 6.8mm version of the .300 Whisper) 7.62x25 7.62x39mm .30 RAR 300 OSSM .357 Auto .35 Gremlin (necked up 6.5 Grendel to 358) .358 WSSM (various names, but all are some form of a WSSM necked up to 35 caliber, some are shortened to make them big game legal in Indiana) .458 SOCOM .50 Action Express .50 Beowulf AR-15 using a simple blowback operation .17 HMR .22 LR .22 WMR 9x19mm 9x21 9x23 30 Carbine 357 Sig 40S&W 400 Cor-Bon 41 Action Express 10mm Auto 45 GAP 45ACP 45 Super 45 Win Mag This list is in no way complete. This list does not include complete different uppers like the FN 5.7 or the one that shoots .410 shotgun, crossbow bolts or bolt action uppers like the 50BMG (credit to melensdad from oa2.org for the list) 
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#4
09-01-2010, 8:11 AM
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So far I have AR's in 5.56/.223 and 7.62x39. Trying to figure out what will be next. The 243 wssm might be fun, the 55gr rounds in that caliber have a crazy flat trajectory. But then a nice house clearing round like the .458 socom sounds fun too. So many options.
http://ballisticscalculator.winchester.com/ Last edited by Bogart; 09-01-2010 at 8:18 AM..
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#5
09-01-2010, 8:12 AM
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LOL. cool list.
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#6
09-01-2010, 8:38 AM
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.50 Beowulf
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_____________________________________________ South Coast Outdoorsman 2736 E Chapman Ave Orange CA 92869 714-532-4867 T - F (11 - 7pm) Sat (10 - 5pm) - closed Sun & Mon _____________________________________________
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#7
09-01-2010, 8:47 AM
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Yeah, there are still many many people who think .223 and 5.56 are the same.
I'd add 5.56 on its own. Great list none the less. I am impressed Is Wylde a chamber size /style or bullet size /style? Last edited by dieselpower; 09-01-2010 at 8:51 AM..
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#9
09-01-2010, 12:09 PM
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Good info here, TAG!
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What Is A Veteran? A "Veteran" -- whether active duty, discharged, retired, or reserve -- is someone who, at one point in his or her life, wrote a blank check made payable to "The United States of America," for an amount of "up to, and including his or her life." USN 1986-1997 
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#10
09-01-2010, 12:23 PM
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.450 Bushmaster
__________________
 "A Government big enough to give you everything you want, is strong enough to take everything you have." "Those who hammer their guns into plows, will plow for those who do not." Thomas Jefferson. "a system of licensing the right of self-defense, which doesn’t recognize self-defense as “good cause” Don Kilmer
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#11
09-01-2010, 2:42 PM
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If you want to get so picky as to differenciate between 223 and 5.56, you should really keep track of the 10+ variations of 223/5.56 chambers... www.ar15barrels.com/data/223-556.pdf
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Randall Rausch AR work: www.ar15barrels.com Bolt actions: www.700barrels.com Foreign Semi Autos: www.akbarrels.com Barrel, sight and trigger work on most pistols and shotguns. Most work performed while-you-wait, evening and saturday appointments available.
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#12
10-12-2014, 10:34 AM
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.300 calibers, Confusing
You mentioned a 300 Wisper which I never heard about. But I know of a 300 AAC and a 300 Blackout. Are they all one in the same or different? I've seen 300 AAC complete uppers for sale as well as ammo, but neither of the other two in either form. What's up doc?
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#13
10-12-2014, 10:40 AM
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#15
10-12-2014, 10:48 AM
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This list is doesn't include many cartridges that have been used on AR15s. I can think of a long list of bolt action uppers chambered in everything from .308 win, 30-06, etc. up to and including 50BMG.
Quote:
 BTW, welcome to the forum.
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#16
10-12-2014, 10:59 AM
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Both of those use a 1.350" trim length. There are also variations of 300x221 that use a 1.400" trim length. The short trim length ammo can be used in any chamber. The longer trim length ammo can only be used in the longer chambers.
__________________
Randall Rausch AR work: www.ar15barrels.com Bolt actions: www.700barrels.com Foreign Semi Autos: www.akbarrels.com Barrel, sight and trigger work on most pistols and shotguns. Most work performed while-you-wait, evening and saturday appointments available.
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#17
10-12-2014, 12:00 PM
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I don't believe 7.62x25 uses a gas system, I'd expect it to be blowback.
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#18
10-12-2014, 2:01 PM
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You want a ton more calibers go check sskindustries.com that's where J.D. Jones does his JDJ cartridge thing and he's the father of the Whisper rounds (300 Whisper, 338 Whisper and so on).
He's also the guy that made the .950 JDJ out of a shortened 20mm antiaircraft round.
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#19
10-12-2014, 2:29 PM
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Hmmm, I'm set on .22LR, .223, 7.62x39, 9mm Lugar and .50 Beo.... May need just one more... I'm thinking 6.5mm Grendel.
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#23
10-13-2014, 8:40 AM
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The possibilities are endless's
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 Sent from a hand held device! Apologies for any typos.
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#24
10-13-2014, 9:24 AM
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The barrel is the harder part to get. There are factory bolts for 6.8spc (0.420"), 7.62x39 (0.440") and 458 socom (0.473") that are used for any of the cartridges larger than a 223/5.56 (0.380").
__________________
Randall Rausch AR work: www.ar15barrels.com Bolt actions: www.700barrels.com Foreign Semi Autos: www.akbarrels.com Barrel, sight and trigger work on most pistols and shotguns. Most work performed while-you-wait, evening and saturday appointments available.
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#25
10-13-2014, 9:43 AM
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I'd love to see a simi auto 30.06 AR platform rifle.
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#26
10-13-2014, 9:51 AM
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http://nemoarms.com/portfolio/omen-m.../gallery/guns/
__________________
Randall Rausch AR work: www.ar15barrels.com Bolt actions: www.700barrels.com Foreign Semi Autos: www.akbarrels.com Barrel, sight and trigger work on most pistols and shotguns. Most work performed while-you-wait, evening and saturday appointments available.
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#27
10-13-2014, 8:54 PM
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I don't agree with the separation of calibers by bolt modification. What ever that means. The AR-15 is a caliber neutral platform. It does not imply caliber. Barrels and bolts and mags change with calibers its part of the AR-15. A 6.8SPC and a 6.5 Grendel is just as much an AR-15 as a 5.56 even though they don't use a 5.56 bolt they use a caliber specific bolt same as the 5.56 uses a caliber specific bolt. You also missed lots of calibers. 450 bushmaster, 270AR, 375 Reaper, 6mm ARP, 277 wolverine just to name a few.
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Hunting with the Modern Sporting Rifle (AR-15/AR-10) Last edited by Xcountryrider; 10-13-2014 at 9:10 PM..
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#28
10-13-2014, 9:03 PM
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http://www.onlylongrange.com/bn36.asp
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#30
10-13-2014, 9:06 PM
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Hunting with the Modern Sporting Rifle (AR-15/AR-10)
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#31
10-13-2014, 9:14 PM
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Ar-10 chamberings
.243 Winchester .22-250 .257 Roberts .260 Remington 6mm Creedmoor 6.5 Creedmoor 6.5 WSM .270 WSM 7mm WSM 7mm-08 Remington .284 Winchester .300 WSM .300 SAUM .300 Savage .325 WSM .338-7mm Benchrest .338 Whisper .338 Federal .338 RCM .35 Remington .358 Winchester .358 HDH (WSSM) .450 Marlin .500 Phantom (this one may have died on the vine) Last edited by Topflight80; 10-14-2014 at 3:49 PM..
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#32
10-13-2014, 9:16 PM
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Hunting with the Modern Sporting Rifle (AR-15/AR-10)
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#33
10-13-2014, 9:18 PM
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Hunting with the Modern Sporting Rifle (AR-15/AR-10)
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#34
10-13-2014, 9:28 PM
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Then there Texas Undergound Tactical http://www.undergroundtactical.com/c...rts/upper.html I got my 270AR bolt with the barrel from AR Performance.
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Hunting with the Modern Sporting Rifle (AR-15/AR-10)
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#35
10-13-2014, 9:28 PM
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The California Moderate Centrist Militia member in exile disclaimer: everything I post is for arguendo and entertainment purposes only, and should not be construed to be legal advice
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#36
10-13-2014, 9:34 PM
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Quote:
__________________
Hunting with the Modern Sporting Rifle (AR-15/AR-10)
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#37
10-13-2014, 9:39 PM
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Last edited by Topflight80; 10-13-2014 at 10:42 PM..
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#38
10-14-2014, 12:03 AM
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If you need help with any stragglers, call a friend, because it's likely that they have a gun. America in particular have done exceptionally well taking care of the problem, as there are 1.12 guns for every 1 American citizen. So throw a rock, you'll probably hit a gun, pick up that gun, then shoot a zombie.
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#39
10-14-2014, 12:13 AM
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Years back HK determined that a .308 could run in simple blowback also... with a 26 pound bolt. I'm guessing the 45 winmag would require around 4-5 pounds of bolt. The 400 corbon should be even more. Bottleneck cases can be operated with gas... .30 carb uppers that use DI are out there. Same for 7.62x25 Tok. Even a 9mm can run on a locked breach gas op gun. and cannot forget Franklin Armory's .17 rimfire that uses an Osprey Piston and a locked breech. Last edited by CRTguns; 10-14-2014 at 12:15 AM..
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#40
10-14-2014, 12:19 AM
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In Blowback, the bolt and bullet part ways at velocities according to the proportion of energy created by the cartridge and the mass of the bolt; (light bullet, high speed vs heavy bolt, low speed....The proportionate velocity is inverse to the proportionate mass of each.). One COULD make a BB AR in 762 tok...you'd need lots of weight or a great buffing system... or you'd just break something eventually. There was a guy making AK blowback kits for 7.62x25... the bolt carrier and bolt were solid, and he kept a structure like the piston, only it was just a big weight. More time is required to overcome the inertia of a greater mass... so chamber pressure can drop to a safe level before the breech uncorks. Contrary to what some believe; a recoil spring cannot be used to retard blowback... the spring's force at the initial load is at its lowest. A spring can slow and return a moving bolt... not delay the bolt's initial acceleration. If your spring were sufficient to delay blowback, as it compresses, its force increases, while the energy acting on the bolt decays. Doesn't work. Last edited by CRTguns; 10-14-2014 at 12:36 AM..
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