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DPMS 260 issues?

 
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  #1  
Old 09-18-2008, 09:40 AM
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DPMS 260 issues?

Let me start off by saying this thread is not ment to be negative toward the company. But instead I would like to hear of any experience you have had with these rifles, both good or bad.

Here is our story. A good friend of mine purchased a 260 DPMS new and asked me to assist him in scope mounting and break in. So we mounted a 3x10x50 Lupy on it ran a couple dry patches through the barrel. Bore sighted and off to the range. First shot did not feed the second so I picked up the brass to examine it. Primer pocket blown out, primer gone, HUGE ejector marks. This was factory Federal ammo. I inspected the rifle and ran a patch down the barrel. Then opened a second box of Federal factory ammo and loaded one of them. This one the primer stayed in, but still HUGE ejector marks. At this point we stopped and went home.

I called DPMS and was greeted by a gentleman that was not seeing the issue. I then said, " we have a potentialy hazardous condition here" and he went to talk with someone else. When he returned he instructed me to remove the top 1/2 of the rifle and send it and the bolt in for them to repair, and also to include the fired brass.

That was 4 weeks ago............. It will be two weeks tomorrow since the rifle owner called and asked what they had determined. He was told it was going out today..... we have been waiting. I just called for another update and to ask if they new what was causing the issue. They said all they knew was it was blowing out primers and had ejector marks on the brass. I said that is the info I sent with it. I then said, can we get an accurate ETA? Hunting season is upon us. He took my number and said he would call me back today or tomorrow. So I will update this when I hear from them.

I hope my opinion changes, but at this point I am a bit less thas impressed.

Jeff
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Old 09-18-2008, 04:39 PM
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Re: DPMS 260 issues?

Good company, outstanding products

I dont know what the issue is I own about 4 AR's and have served in the MIL for 9 years and have never heard of a issue like this. In the AR weapons systems FTF issues are allmost allways attributed to the Magfollower.

I like DMPS they make a good product. I did not talk to the guy on the phone but I would call back and hope to get someone else if it were me.

Other things it could have been are the wrong recoil buffer and spring assembly.

Short recoil spring.

The chamber could have been dirty or had meatal shavings in it.

The barrel not might not have been tourqed to spec.

I know they shoot 10 rounds at the factory for civilian weapons and 30 for LE.

It could be the ammo to.
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Old 09-18-2008, 09:32 PM
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Re: DPMS 260 issues?

Yep, it could be the ammo too. But if so it is from two different boxes of factory ammo.

Chamber was clean and we run a couple patches through the barrel to make sure it was clean too.

Would tight head space do this? I don't know? I am not a smith, so we will see if they return my call tomorrow.

I have heard great things about these rifles. But right now the only thing I am sure of is they have had a returned NEW rifle for a month and have not touched it.

Jeff
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Old 09-19-2008, 12:27 AM
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Re: DPMS 260 issues?

The DPMS AR 10 Is the Same as the Bushmaster .

DPMS Bought out Bushmaster AR 10 Set Up .an All of There Tools To make hte AR 10 .

Terry
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Old 09-19-2008, 04:14 AM
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Re: DPMS 260 issues?

DPMS has an excellent reputation for building a very good AR rifle. I live about 15 minutes away from the shop yet if I was going to buy one, I'd go to a local dealer because DPMS is booked out for a few months. They are very busy fillingLE and large shipment orders from what I can tell.
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Old 09-19-2008, 05:52 AM
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Re: DPMS 260 issues?

Just for what it's worth. I ordered a 308 back in Feburary, and all i know is that it's in the flow of things somewhere. This will be may second DPMS rifle.
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Old 09-19-2008, 03:42 PM
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Re: DPMS 260 issues?

I dont think a short chamber would cause this. I do think a slam fire would however. There is a small possabilty that you had a slam fire the firing pin punctured the primer before the round was seated and the lugs had rotated into battery. This would cause the primer to blow out and the extractor to chew up the case rim and the weapon to malfunction. There is allot of force put on the case by an auto loading rifle. Make sure your budy hits the forward assist with his palm apon chambering the first round.

The military uses diffrent primers in there ammo than are used in hunting ammo. The cup of the primer is allot stronger on military ammo thus eliminating the chance of a slam fire.

I use CCI #34 primers in my auto loaders.

I am not saying this is what happned but it would explain it from the info I have. You said the ammo was from 2 diffrent lots but not 2 diffrent manufactures right?

I was also wondering why you ran dry patches and not wet through the bore before you shot the weapon?

Last edited by ICANHITHIMMAN; 09-19-2008 at 03:46 PM.
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