AR15.Com Archives
 Colt LE6920 - Ammo?
msz  [Member]
6/5/2005 11:07:21 AM EST
Okay, so I bought a Colt LE6920 NIB. I now need some ammo. I want to buy some bulk ammo so I can do some target practice. 500/1000 rds. should do. I don't mind spending $200 but I'm not sure what the best ammo is for this weapon. I thought that .223 was the same as 5.56mm but while doing research some say you can't use 5.56 ammo for all .223 chambers. I don't want to know all the available specs: velocity, twist, etc. I just want to shoot. I'm not going to battle, hell, I will probably only shoot out to a couple hundred feet. I also don't want to buy some surplus or military rejected ammo that will blow up in my face either. I saw some Lake City XM193 ammo for a good price but I also read this post about the quality of the cartridges:

Can't I buy some good quality ammo, at a reasonable price, that I can shoot without having to hand check every goddamn cartridge. I just want to shoot. I read that the M855/M193 is good but only available to civilians as the military rejected lots now marked as XM193. Some feedback from shooters with similiar Colts and their preferred ammo would be greatly appreciated.

I also found this on Cabelas web site:
Is this any good for my Colt?
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die-tryin  [Team Member]
6/5/2005 12:33:02 PM EST
IF you want reliable and accurate and factory loaded ammo. I would go with Hornady 69 or 75 gr ammo or BlackHills. If ya want some that is a lil less expensive go with Winchester white box stuff or the winchester Q3131A. I havent had any issues with the Federal Xm193 but if your hesitant than get some current stuff like I mentioned. More than likely you have 1/9 or 1/7 twist rate which means you can shoot anything from 77gr on down. 40gr may require 1/12 not sure.
AR15Vern  [Member]
6/5/2005 12:41:32 PM EST
I just picked up my 6920 last week. I'm ordered some PMC 55gr that should be here Tue. I'll let you know what happens.

msz  [Member]
6/5/2005 12:48:08 PM EST
The Colt 6920 does have a 1/7 twist.
KScoltAR  [Member]
6/5/2005 1:20:52 PM EST
I've run Federal XM193 5.56 and Winchester White box .223 through mine with no problems. I don't think you have anything to worry about. Just go with what you can get and enjoy shooting that thing.
redfisher  [Team Member]
6/5/2005 1:49:46 PM EST
Mine have run the same thing from day 1 - free delivery
DocGun  [Team Member]
6/5/2005 1:58:10 PM EST
I run Federal XM193 5.56 or Federal AE .223 through mine.
what_stanger  [Member]
6/5/2005 4:03:39 PM EST
i've also got a 6920 and feed it everything i can.

i shot some of a friends 40gr. federal......was that a bad idea with the 1/7 twist?
we were just burning it up, it couldn't have hurt my gun in anyway could it?

EDIT: i've only fired 20 rounds of wolf, i don't know if i want to shoot that stuff or not.
Sparky315  [Member]
6/5/2005 4:57:03 PM EST
The Colt LE6920 has a 5.56 chamber and a chrome-lined 1/7 twist barrel, so you can pretty much shoot any .223 or 5.56 load on the market. You will not hurt it shooting 40-grain bullets. I would stay away from Wolf, though- when I went through the Colt armorer's course, the intructor said you should only shoot Wolf if you consider your rifle to be a disposable item.
El_Roto  [Team Member]
6/6/2005 11:32:28 AM EST
Sorry I'm late.

I've recently found that my 6920 loves XM193. Lucky for me since that's what I have on hand.
Troy  [Site Staff]
6/6/2005 2:01:14 PM EST
XM193 should be fine fpr practice. XM193PD will also be okay IF you cull out the bad rounds. The folks that have had problems with it most likely didn't do that (not being familiar with bulk-packed ammo, which almost always means Grade 3 or lower).

MEH92  [Member]
6/7/2005 9:01:54 PM EST
Georgia Arms sells 55gr FMJ loaded to NATO velocity for $150/1K, delivered if you buy $500 at a time. Otherwise, you pay shipping. My friends and I have shot many thousands of rounds of this ammo (commercially reloaded) through our Colt 6920's and RRA E/T's and it works very well. It is our "official" practice ammo.
CB1  [Team Member]
6/8/2005 4:24:31 AM EST
break it in with some good ammo.
Then shoot it up with Wolf!! The 62gr is a little more accurate than the 55gr stuff
f2  [Member]
6/14/2005 5:56:16 PM EST
f2  [Member]
6/14/2005 6:00:17 PM EST

Originally Posted By what_stanger:
i shot some of a friends 40gr. federal......was that a bad idea with the 1/7 twist?
we were just burning it up, it couldn't have hurt my gun in anyway could it?

EDIT: i've only fired 20 rounds of wolf, i don't know if i want to shoot that stuff or not.

OK, what is all this stuff about rifle twists and different ammo?

You can also overspin projectiles and cause overstability. This results in the not-so-desirable condition that keeps the nose of the round pointed high, as illustrated below:

You can also spin them so hard they fly apart. That's rare, but it happens if you are dealing with very tight twists and very high velocities. When fired at 3200 fps in a 1-in-7 twist rifle, a round is rotating at over 300,000 rpm when it leaves the muzzle. Light, thin-jacketed varmint bullets (i.e., 40gr Hornady TNT or Federal Blitz bullets) often can't take that much spin and will pull themselves apart.

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