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11/29/2004 5:29:58 PM EDT
I was reading the Ammo Oracle about the MK262, and it says the spec-ops forces use it in Afghanistan in short barreled AR15s.  What type of twist rate is needed to stabalize these bullets?  Would this be good in a normal 1/9 Colt 5.56 Nato barrel?
11/29/2004 5:31:06 PM EDT
[#1]
I use the term "normal" loosely.  I guess normal is what my AR has.
11/29/2004 5:31:43 PM EDT
[#2]
I would recommend at least 1:8, preferably 1:7 twist.

11/29/2004 5:46:36 PM EDT
[#3]
Thx - Does anyone know the twist rate in those barrels the spec. forces use?
11/29/2004 7:09:40 PM EDT
[#4]
Twist rate for military M16A2's, A4's and M4's are 1/7".
11/29/2004 8:25:53 PM EDT
[#5]
75-77gr shoot fine in 1:8"
11/30/2004 6:46:38 AM EDT
[#6]

Quoted:
I was reading the Ammo Oracle about the MK262, and it says the spec-ops forces use it in Afghanistan in short barreled AR15s.  What type of twist rate is needed to stabalize these bullets?  Would this be good in a normal 1/9 Colt 5.56 Nato barrel?



Why are you asking this question since you cant get any MK262 and are obviosly not in a position in the military to shoot any?  I have a feeling your next question would have been where can I purchase MK262 ammo.  The answer is nowhere unless you buy 25k rounds of it at once... even then I predict difficulty geting it.
11/30/2004 7:41:58 AM EDT
[#7]
Fulton-Armory was selling "cosmetic seconds" Mk262 Mod 1.  Jeff Hoffman from Black Hills says so right here:
www.tacticalforums.com/cgi-bin/tacticalubb/ultimatebb.cgi?ubb=get_topic;f=78;t=000639;p=1#000008
Why not call and see if they have some left?
11/30/2004 10:34:24 AM EDT
[#8]
That ammo to my knowledge is not current  NATO pressure, not crimped at primer (could easily be wrong there) and does not use the cannelured Sierra bullet currently used.  Youd be better off buying Black Hills standard ammo than that and 75 grain TAP would be better for defense IMO.
11/30/2004 11:00:30 AM EDT
[#9]

Quoted:

 Would this be good in a normal 1/9 Colt 5.56 Nato barrel?




From the Ammo-Oracle:

There is, of course, an exception: if you want to use loads utilizing the heavier, 75-77 grain match bullets currently used by Spec-Ops troops and other selected shooters, you'll want a 1:7 twist barrel.  Although military loadings using these bullets are expensive and hard to get, some persistent folks have managed to obtain a supply, and will need the proper barrel twist to use them.  Anyone who foresees a need to shoot this ammo should consider a 1:7 twist barre



ar15.com/forums/topic.html?b=3&f=16&t=208574
11/30/2004 11:59:46 AM EDT
[#10]
DevL,
Fulton Armory  does sell MK262MOD1 cosmetic seconds. This is ammo pulled from our military runs during our detailed hand inspection process. The ammo is  MK262MOD1 spec in every regard, but has minor cosmetic flaws which do not affect accuracy, function or performance. Things that would cause the cartridge to be seconded include too much primer laquer, minor tarnish, scratches,or often when a granule of powder gets trapped between case neck and projectile, causing a minor bump, which is still under maximum cartridge dimension in this area. All ammo pulled for cosmetic seconds is 100% gaged for dimension, and there is no ballistic difference.

Since the prior referenced post ALSO mentions AMU, marksmanship ammo, I need to clarify that the AMU ammo referenced is  NOT  MK262MOD1.  I do not know if Fulton has any of the AMU ammo left, but I doubt it. That ammo shot sub  .7 moa @300 meters for 10 ,10 shot averages, (100 rd tests)and is probably long gone by now.  

Fulton probably does still have MK262 seconds, and can get more.  We guarentee customer satisfaction, even on our cosmetic seconds. We offer them at a substantial discount because they have cosmetic flaws, but we still guarentee the customer will be happy with his purchase, or let me know and we will fix it.  Thanks, Jeff
11/30/2004 12:14:36 PM EDT
[#11]
DevL,
I reread my post and realized that I did not specifically address some concerns you had. The MK262 MOD1 cosmetic seconds do have crimped primers, cannelured Sierra 77 projectiles, and are loaded to US 5.56mm milspec pressure. Thanks,Jeff
11/30/2004 12:22:13 PM EDT
[#12]
Sierra8,
 thanks for posting here- It helps to get the scoop straight from the source.

DevL,
  fire up your credit card!

Fulton-Armory,
  I'll be expecting my commission for drumming up ar15.com business..
11/30/2004 12:26:10 PM EDT
[#13]
Thanks Jeff!
11/30/2004 2:00:53 PM EDT
[#14]
Hmm.....maybe I should not try to roll my own after all.  

What is the std. NATO pressure and MV?
12/1/2004 6:52:07 AM EDT
[#15]
223rem,
I cannot not go into detail on the mil spec for a particular item without gov approval, however, the general spec for US 5.56 ammo is 58,700 psi max, measured at case mouth. Please note this is a different method than SAAMI transducer or copper crusher, as used on commercial ammunition. 5.56 ammunition spec results in ammunition loaded to a higher pressure level than commercial .223, but the test methods specified are different. The military also measures velocity a bit differently, at 78'. With our 5.56 77gr you can expect about 2770 fps at 15' from a 20" brl. Keep in mind that guns can vary somewhat in velocity for a number of reasons. Jeff
12/1/2004 7:07:05 AM EDT
[#16]
BLACKHILLS ROCKS!
Jeff,
Thanks for posting, and please continue in the future.
12/1/2004 7:50:45 AM EDT
[#17]

Quoted:
Would this be good in a normal 1/9 Colt 5.56 Nato barrel?



It works fine in some 1:9 rifles, it doesn't shoot for $h!t in other 1:9 twist barrels.  The only way to know is to try it out.

1:7 is preffered if you want to shoot the 77gr and 75gr projectiles.
12/1/2004 4:21:35 PM EDT
[#18]
2770 FPS MV @ 15'  from a 20" barrel?  Rather quick for a 77 grain bullets.

"How do they do it?"  
12/2/2004 2:01:30 AM EDT
[#19]
Thanks for the info.  I had the AMU ammo and the MK262 seconds confused and was not  aware of the MK262Mod1 ammo's availability.  Is the 77 grain blems on their site the AMU ammo or MK262... they only identify it as 77 grain blemished Sierra loaded Black Hills.
12/2/2004 5:52:35 AM EDT
[#20]
DevL,
I haven't seen their site, so it would be safest to ask them, They have bought both. They do have access to the MK262MOD1 seconds. Thanks,Jeff
12/2/2004 5:53:35 AM EDT
[#21]
223rem,
Keebler elves. Jeff
12/2/2004 7:44:42 AM EDT
[#22]
I thought that most of the special folks that get to use the nato 77gr stuff in the sand box were shooting 18" SPR or a M4's,so why is the FPS always based on 20" ,cause it sound better?Anyone have a figure from guns with shorter barrels?
12/2/2004 8:03:16 AM EDT
[#23]
sierraeight,
I appreciate the info, thanks.
12/2/2004 8:06:32 AM EDT
[#24]
Is military demand for this round increasing? Will it always be a specialty round or will it ever be more widely issued?
12/2/2004 9:11:15 AM EDT
[#25]
I just called Fulton, and the lady I spoke to on the phone said:
“262 what? Oh, the Army ammo? No, we’re sold out, we haven’t had that in a long time.”
Did I have the bad luck of talking to the wrong person? I don’t see it advertised on their site either.
12/2/2004 9:27:42 AM EDT
[#26]
PE556,
Thanks for the headsup. We're on it, and will get it clarified on this site.Jeff
12/2/2004 9:45:45 AM EDT
[#27]

Quoted:
223rem,
Keebler elves. Jeff



I knew it!  So it's no longer just crackers and cookies.........I am also pretty sure Santa Claus subs some of his work out to the Keebler Elves as well.

Maybe the Folks at Remington should sub their 6.8 needs to your branch of  elves.






12/2/2004 9:48:29 AM EDT
[#28]

Quoted:
Maybe the Folks at Remington should sub their 6.8 needs to your branch of  elves.



Hint.  Hint.  Hint.
12/2/2004 1:50:36 PM EDT
[#29]
Fulton used to have two different Black Hills specials on their website- One was cases of 500 for $330? IIRC that was the AMU ammunition and had a pic of a SPR in the advert etc. etc.  That stuff is now gone and the ad is off the website.  What remains is the advert for 77 gr. 'blems' which is, as I understand it, the Mk262 mod 1 'seconds'.  (I e-mailed Fulton a while ago and asked and they replied that it is the Mk262 seconds ref'd in the Tacforums.com post)
12/2/2004 2:00:56 PM EDT
[#30]
PE556,
We called Fulton to make sure they knew what people wanted. You might try them again. Thanks for your patience and notification on the confusion. This is not an exclusive deal with Fulton; they have bought some but other distributors can too, if you normally deal with with any of our other accounts such as GP or Creedmore Sports, they can get them. They just need to ask for the MK262 cosmetic seconds. We have them in stock, and continue to generate them as we inspect the military poduction.  Jeff
12/2/2004 2:03:54 PM EDT
[#31]

Quoted:

Quoted:
Maybe the Folks at Remington should sub their 6.8 needs to your branch of  elves.



Hint.  Hint.  Hint.



2nd the hint!
12/2/2004 2:15:53 PM EDT
[#32]

Quoted:
223rem,
I cannot not go into detail on the mil spec for a particular item without gov approval, however, the general spec for US 5.56 ammo is 58,700 psi max, measured at case mouth. Please note this is a different method than SAAMI transducer or copper crusher, as used on commercial ammunition. 5.56 ammunition spec results in ammunition loaded to a higher pressure level than commercial .223, but the test methods specified are different. The military also measures velocity a bit differently, at 78'. With our 5.56 77gr you can expect about 2770 fps at 15' from a 20" brl. Keep in mind that guns can vary somewhat in velocity for a number of reasons. Jeff



Information like this is specifically why I lurk here at Arfcom.  Reminds me of when The American Rifleman magazine was the definitive source of firearms information.  Many thanks, sierraeight.
12/2/2004 2:55:09 PM EDT
[#33]

Quoted:

Quoted:

Quoted:
Maybe the Folks at Remington should sub their 6.8 needs to your branch of  elves.



Hint.  Hint.  Hint.



2nd the hint!



Ahem.

HINT HINT HINT

Don't make me use larger words in a red font.  
12/7/2004 3:40:34 PM EDT
[#34]
Jeff,

Thanks' for lending your time and info here.

Abel
A.P.D.
12/8/2004 7:14:04 AM EDT
[#35]
TMAX,
Thanks for the welcome that you and the others here have given to me. I don't post often because of time (I could easily get involved in discusssions that would keep me from getting my work done), and because some things are inappropriate for me to answer. I do really appreciate the sense of comraderie and helpfullness here. Jeff
12/8/2004 3:03:00 PM EDT
[#36]

Quoted:
TMAX,
Thanks for the welcome that you and the others here have given to me. I don't post often because of time (I could easily get involved in discusssions that would keep me from getting my work done), and because some things are inappropriate for me to answer. I do really appreciate the sense of comraderie and helpfullness here. Jeff



There's the answer to your 6.8 questions

BTW, glad to see you over here Jeff!

-Cap'n

12/8/2004 6:34:27 PM EDT
[#37]
Thank you Jeff!!!!!!!!
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