Issue with LR308

G

geetarman

New member
I was out at the range on Friday to rezero my LR308 after putting flip ups on the Eotech sight I have on that rifle.

I had 6 magazines loaded with 10 rounds in each. I was shooting DAG surplus .308.

First magazine had an issue at round 7. I had a stoppage and looked in the port and the bolt was not closed all the way and a round was jammed trying to load into the chamber in which there was already a round.

It was a bear to get everything unstuck and the kicker is there was a LOADED round in the chamber.

So how did I get a loaded round in the chamber with the bolt not in battery and a round from the magazine jammed trying to occupy the same space as the round in the chamber? I do not understand how this could happen.

I wish I had pictures, but I don't.

After clearing the stoppage, the rest of the magazine functioned normally.

I reloaded the two rounds and cycled them through the action and they functioned normally.

I would have chalked this up to some gremlin except it happened again on a different magazine at about the same spot ( 6th or 7th round ).

I did not shoot the other two magazines.

I normally load 10 rounds at a time and tap the magazines to make sure the rounds are against the rear wall of the magazine.

I normally run grease on the bolt and not oil. That seems to be the advice given me by members who shoot a lot out here in the desert.

The ammuntion is from the same lot of West German DAG 147 gr. 7.62X51 surplus. I have had NO problem with that ammo in my M1A.

So the question is: What do you think might have caused the problem?

I DID have some issues with DPMS magazines when I first got the rifle but it has functioned just fine with the replacement magazines and have had no issues with the gun since it was new.

I probably only have 500 rounds through the gun and will have to check my log book to see for sure.

I have not cleaned the gun since Friday. I may take a look at it today or take it back to the range on Friday and run the remaining magazines through and see what happens.

I load my magazines the day before I go to the range and normally leave them stored empty.

Any clues from you folks would really be appreciated.

As ever, Thanks!!!

Geetarman:confused:
 
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Sounds like weak spring in the mag or splayed feed lips is the issue.

From what you describe, Sounds like the friction of the bolt dragging across the top of the next round in the mag was enough to try and strip that round out of the mag and jam it into the round being chambered.

Check that your bolt does not have any burrs or debris on the bottom surface.
 
Interesting!

Are ya using original DPMS mags?

Ain't been dropped have they?

Mine has been flawless thru about 1000rds of various commercial match and surplus ball ammo.

PC300001.jpg
 
Magazines have not been dropped nor have they been left loaded for extended periods.

I am leaning toward magazine issues but am not sure at this point. Any advice is appreciated. The empty magazines are kept in my safe and I normally load them the day before I go to the range.

These are DPMS factory mags. As I said before, I did have a problem when I first got the rifle. DPMS had a sale on magazines and I bought four of them and had problems with three of them and sent them back.

They were replaced and have had no problems until this past Friday.

I really want to get to the bottom of it.

Geetarman:D
 
P shooter,

Do you run your gun with grease or oil?

I am going to check the bolt really close today as well as the magazine feed lips.

I will put a caliper on them and measure the gap and see if there are gross differences in width.

I have two magazines that came with the gun and the four that I bought. I do not have a clue which ones are which.

Geetarman:D
 
I use plain old CLP in mine.

I've had this happen in the past, and always tracked it back to the magazine. Wether it be the spring, follower, or feed lips.
 
I have two magazines that came with the gun and the four that I bought. I do not have a clue which ones are which.

Geetarman
Click to expand...

Original DPMS mags are marked on the baseplate. Hard to read sometimes. Wipe with an oily patch (or a wet finger) and you'll see it better.

I number all my mags for every gun.

Keeping quality mags loaded has no effect. Modern quality springs do not take a 'set' and do not need to REST. I've found 1911 mags loaded since or shortly after WWII and M-16 mags loaded since 1968. They worked perfectly.

Heard great reviews of the MagPul Mags for the LR/AR-308.
 
They are all DPMS marked. I just cannot tell which ones came with the gun and which ones came in the sale.

Might be able to wipe them all down and see if four look "different" than two.

Might be able to look at the final color of the finish and see if four came from one lot and two from another.

Geetarman:D
 
Number them and and run 'em again , replace the ones that fail. There's a silver Sharpie that works great on black.
 
I had unacceptable performance with the DPMS mag supplied with my LR308.I bought a qty of C-Products mags.They are working fine.I intend to get some Magpuls.I did not try to fix the DPMS mag.

It does seem like your mag let two rounds out Could be something in the mag kept the follower from maintaining pressure on the round stack.
 
My fix for a bad magazine that does not work is a sledgehammer then the trash so somebody else will not be able to use it.
 
Load up the magazine with 2 or 3 cartridges. Look at the angle of the nose of bullet. The older mags held the nose too far down and the bullet would dive into the the base of the feed ramp and jam. Remove one cartridge and compare again. The difference was very obvious when I compared it to my C-products magazines. A pair of pliers and methodical adjustment of the feed lips (ensuring the lips maintained even pressure on the entire round) fixed it.

It should be noted that I'm using C-products and P-mags at this point. I still have about 5 unopened DPMS mags.
 
I normally run grease on the bolt and not oil.
Click to expand...

The .308 AR platform like to be very wet with oil. I do use some grease on the bolt at the contact points with the receiver, but the bolt is very well oiled.

Try a Pmag and see if the helps, most LR-308 owners swear by them and swear at the oem mags.

The LR-308 uses a AR15 RE with a shortened AR15 buffer. Using a full size .308 buffer and RE may help also.
 
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