View Full Version : Final verdict on ADCOM M855
So, what's the good, bad, and ugly about the ADCOM 5.56 M855?
Will be used out of a 20" Colt AR-15A2.
So, what's the good, bad, and ugly about the ADCO 5.56 M855?
Will be used out of a 20" Colt AR-15A2.
Please do not confuse the Winchester M855 sold by ADCO, with the foreign ADCOM M855 currently on the market.
I'm curious about the British ADCOM M855 as well.
OK, sorry I left the "M" off.....does anyone have any feedback on the ADCOM M855?
http://ammunitiontogo.com/catalog/product_info.php?products_id=726
I bought 120rds last month to test out in my Defender 2000 M4
Accuracy was on par withIMI,Lake City and Win M855 2 or 3 inch at 100 yrds
Brass is nice primmers crimp and sealed and black tar on the bullet :)
I paid alot for it . For a Box it was just under 5 bucks
and to think back in 2001 a box of Q3131A was 2.35
I have
ADCOM M855
IMI M855 1999
Win M855 1989
Lake City M855 1998 I bought back in 2001
Lake city M855 2001 came in a Can with bandoliers
Santa Barbra SS109 1993 THE most accurate SS109 I have shot
Sellier&Bellot ZV NATO SS109 2000 second most accurate and is loaded HOT
Out of all those the SANTA BARBRA SS109 is the most accurate SS109 I have ever shot!! Not counting BH MK262 and there super accurate 77gr Blue box and red. Thats out of a 14.7 hbar ,20 hbar bushmasters and 2 LMT M4 14.5
I had Chuck S. Test out the Sellier & Bellot SS109 before I would buy alot of it?
Chuck is the 50IBZ zero guy!
Chuck has help me out alot back in 2001 and others as well
Anyway the ZV NATO SS109 had a AVERAGE 3184 FPS @ 25yards and a SD 14
Wich for military ammo is pretty good .
The S&B is HOTTER than M855 specs
So its not TRUE that ALL M855 is hotter than SS109 type
I hope it's worth a damn, I just bought 100,000 rounds:confused:
I'll find out in the days to come and let you know.
Eric
Voodoochild
09-03-06, 21:06
I hope it's worth a damn, I just bought 100,000 rounds:confused:
I'll find out in the days to come and let you know.
Eric
Damn!!! 100K You should be good for a while huh.. I know surplusammo.com sells it for pretty good prices.
I'm bumping this thread because I had the same results today as in THIS (http://www.ar15.com/forums/topic.html?b=3&f=16&t=297010) thread. Blown primers was the order of the day and temp was a mild 85 degrees. Buyer definitely beware.
I bought 400 rounds of this stuff at $3.99/box from the local Gander mountian, 98 Headstamp.
Inspected the 400 and all looked great. All fired great through my AR so I went back and cleaned them out and bought 1,600 more.
I chronoed the ADCOM M855 results vel avg for 5 shot groups
16" 2912
14.5" 2835
Cameron
I got the same ammo as Cameron at the same store.
So far it shoots great, and at $3.99/box I'm a happy camper.
I've not notice any signs of over preasure, bulged primers etc.
I was able to get a 5 shot group at 200 yards with open sights to hold about the 5" range. It prints about 1" or 2" lower than Q3131 at 200 yards.
So far I'm happy with it.
EDIT: That's with a 16" Bushmaster carbine.
Overall, I'm pleased with the ammo. I did notice it has a higher pressure at the chamber and less at the port. Also, out of the first 1000 rounds shot, I had a few cases that popped primers, during ejection. No major failures or malfunctions, but if you have an AR with a lazy action, you might not have total lock back, on the last round hold open. The F2000 seems to LOVE it.
I'm very pleased with the accuracy.
Eric
K.L. Davis
10-02-06, 23:21
...The F2000 seems to LOVE it.
Eric
:mad: rat bastard...
:p
From what i have heard the "bad batch" is the 99HS (1999)
Overall, I'm pleased with the ammo. I did notice it has a higher pressure at the chamber and less at the port. Also, out of the first 1000 rounds shot, I had a few cases that popped primers, during ejection. No major failures or malfunctions, but if you have an AR with a lazy action, you might not have total lock back, on the last round hold open. The F2000 seems to LOVE it.
I'm very pleased with the accuracy.
Eric
eric, how do you know the differences of pressure between the chamber and port? i mean how do you measure that? not being a smart ass but its interesting to me, i like mechanical stuff like that
556shooter
10-04-06, 08:47
I'm curious about the British ADCOM M855 as well.
There is no such thing as British ADCOM. The British M855 style ammo is Radway Green. I have shot 720 rounds of the British Radway Green ammo and didn't have a single problem with it, and the brass is pretty good for reloading.
Regarding the original topic of this thread... I ordered a case of ADCOM M855 from Sportsmansguide.com for $169 shipped and I have shot about 400 rounds of it so far without a problem. Most of this shooting was in 85-95 degree heat. I didn't get any popped primers or anything of the sort, but a few cases did form a split in the neck after the first firing. The whole case is 98 headstamp, and most people seem to agree that the 99 stuff is what causes the problems... so maybe that is why I didn't have any significant problems.
There is no such thing as British ADCOM. The British M855 style ammo is Radway Green. I have shot 720 rounds of the British Radway Green ammo and didn't have a single problem with it, and the brass is pretty good for reloading.
Regarding the original topic of this thread... I ordered a case of ADCOM M855 from Sportsmansguide.com for $169 shipped and I have shot about 400 rounds of it so far without a problem. Most of this shooting was in 85-95 degree heat. I didn't get any popped primers or anything of the sort, but a few cases did form a split in the neck after the first firing. The whole case is 98 headstamp, and most people seem to agree that the 99 stuff is what causes the problems... so maybe that is why I didn't have any significant problems.
Good for reloading? Is it boxer or berdan primed? I thought it was berdan.
Cyclic240B
10-04-06, 11:41
Go to the Arfcom/hometowns/washington room and ask that question. They had an organized shoot a couple weeks ago and had the ADCOM jack up three weapons. One, a complete LMT Rifle, pretty badly. :eek:
I've gone through 300 rounds of a 500 round case I have. It all seemed to go bang fine, there have been some issues with 99HS though.
556shooter
10-04-06, 13:12
Good for reloading? Is it boxer or berdan primed? I thought it was berdan.
It is boxer primed, I have already reloaded a few hundred of the cases.
556shooter
10-04-06, 13:13
Go to the Arfcom/hometowns/washington room and ask that question. They had an organized shoot a couple weeks ago and had the ADCOM jack up three weapons. One, a complete LMT Rifle, pretty badly. :eek:
What year was the stuff that "jacked up" three weapons, and were all of the weapons chambered for 5.56mm?
Cyclic240B
10-04-06, 15:00
What year was the stuff that "jacked up" three weapons, and were all of the weapons chambered for 5.56mm?
All 5.56mm chambers? The one with the most damage was an LMT, so it was 5.56mm for sure. And I don't shoot the stuff, so I have no idea what year it is. But whenever arf' is back up I'll get the answer for you, and linkage to the thread they were discussing it in. :)
SinnFéinM1911
10-04-06, 15:10
The F2000 seems to LOVE it.
I'm very pleased with the accuracy.
Eric
What a gun huh ??
lol
:D
Cyclic240B
10-04-06, 15:41
............... But whenever arf' is back up I'll get the answer for you, and linkage to the thread they were discussing it in. :)
Here is the link to the LMT upper one, http://www.ar15.com/forums/topic.html?b=8&f=15&t=244543
Isn't that the one where the round looked like it had an "out of battery bulge"?
If it is (and it is the same pictures) then it was not caused by the ADCOM ammo, right?
Cameron
What Ammo doesn't Kaboom a gun now a day's....
I bought 1K of the Adcom.. SHot about 400 and not a boo with accuracy on par with XM193
Maybe it's just me, but over the last 14K or so I have shot over the years I have shot the following Surplus
XM193
SA193
Sellier and Beloit
Wolf Polymer
ADCOM
Guat
Norinco Yellow Box
Russian 55gr
Winchester
Black Hills Blue box
IMI 55gr.
American Eagle
and probably a few more brands I cannot think of..
And short of a dud here or there... nothing...
I guess I am more of a realist in knowing that Ammo is produced at Highspeed on highspeed machines and no one can guarantee every last rd from the BILLIONS made is gonna be like a swiss watch.
I think the Internet has perpetuated our societies craze for Perfection. Hell, back in the day before internet gun boards, I just shot the stuff and it went boom. Now 5 guys get on and tell ya to avoid 99% of the ammo cause they has a primer pop out....
I should be afraid to shoot anything...
Just my take.. anyone don't want there ADCOM or any other ammo they are leery of??? send it to me......
ffhounddog
10-04-06, 19:53
I am going to shoot 24 Thirty round mags of my 99 HS if it goes good I will order more if not then I will shoot up the other 1500 or so rounds and then from there get Wolf ammo the other bad stuff. I have shot 1000's of rounds of this stuff in my Cav-15 all 99HS so I dont know. The Cav-15 also likes Olympic and I have 3000 more of that. Cheers all
ffhounddog
eric, how do you know the differences of pressure between the chamber and port? i mean how do you measure that? not being a smart ass but its interesting to me, i like mechanical stuff like that
From what I noticed, the powder of the ADCOM has a quicker burn rate than most SS109/M855 ammo. This quicker burn rate produces higher pressures at the chamber, but on a long gun, like an SPR, the pressure is to low at the port, because the gas expansion was wasted near the chamber.
From what I noticed. the ammo works great in the Mk18, Commando and SMG barrels, but it's not as friendly with gas systems if it's mid-length or longer. If the burn rate was alittle slower, then I would be totally pleased...
Sinn Fein,
The F2000 ran flawlessly, but what an odd gun. It's alittle excessive with recoil (even in the proper gas setting), plus the compensator works to well. In other words, the muzzle is pushed down a little too much. Either then that. It's a neat gun.
Any word on the purchases?
Eric
I personally have had no issues with the M855 ammo that was manufactured by Winchester. I have shot some of the ammo you are talking about. For some reason though my rifles don't shoot it as accurate as the Lake City stuff. I find that the M855 made by LC is more accurate that the Winchester stuff. The XM193 that I have been getting is also more accurate that the M855 stuff made at LC. All of my rifles have the 1:7 twist also. If you are lucky enough some one will get on here and tell you you are crazy to shoot anything but Blackhills and if you do you are just rolling the dice. Remember this is from personal experience I am not recommending one over the other.
I chronographed some of lot. no. AML98M010-001 yesterday in my 16" RRA carbine.
AV 2933 fps
HI 2974 fps
LO 2899 fps
ES 76 fps
SD 22.9
The couple of groups I've bothered to measure were in the 3 to 3-1/2" range at 100 yards. They were shot with my elbows on the table, no sandbags, bipods, etc. Sighting was through an EOTech 512.
I've noticed a few flattened primers out of the 120 rounds I've fired. Thankfully there haven't been any that pierced or caused catastrophe. Probably 60 to 70% had obvious dings or significant scratches in the brass before firing.
I doubt I'll be buying more.
As an update I have now purchased 3000 rounds of ADCOM M855 from Gander Mtn for $3.99/box and I have fired 900 rounds total through my Bushmaster M4gery. I have not seen any blow primers and have had zero failures. This has all been 98 Headstamp.
Cameron
Heavy Metal
10-29-06, 12:38
I fired 100 rounds of 98 HS ADCOM the other day and had one poppe dprimer. The primer pocket was enlarged on the casing and the primer itself had the firing pin indent pushed out by the pressure. The primer was stuck on the bolt face.
My rifle is a 5.56mm chamber and previously had over 6000 (proabally closer to 7) rounds on it with ZERO popped primers including shooting mil spec stuff on 90+ degree days.
This was the first popped primer ever with this weapon and my first popped primer in eight years.
I'll pass on more. Beware
I chronographed some of lot. no. AML98M010-001 yesterday in my 16" RRA carbine.
AV 2933 fps
HI 2974 fps
LO 2899 fps
ES 76 fps
SD 22.9
The couple of groups I've bothered to measure were in the 3 to 3-1/2" range at 100 yards. They were shot with my elbows on the table, no sandbags, bipods, etc. Sighting was through an EOTech 512.
I've noticed a few flattened primers out of the 120 rounds I've fired. Thankfully there haven't been any that pierced or caused catastrophe. Probably 60 to 70% had obvious dings or significant scratches in the brass before firing.
I doubt I'll be buying more.
I've chronoed 98 lots from my 16" Bushmaster and came up with results close enough it's not worth the trouble to post.
I also get good group with it at 200 yds with open sights (from the bench) and it shoots about 3" lower than Q3131.
I picked up 100 rounds of the 98 headstamp to try out. I started out using a rifle built with an Armalite HB with a .223 chamber and got two popped primers out of 20 rounds with several other casings showing flatened primers.
Fired the other 80 rounds out of two bushmaster and one colt all with 5.56 chambers and had no popped or flatened primers.
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