joe from MO

Sorry. Did a typo. The rifle is a DPMS LR-308. I took it to a local machinist who also has a gun shop and he saw what I saw and said the barrel needs a chamfer. The edge is so small I am not sure a photo would show it and I am an old guy who has never posted a photo on a forum. I'll go buy a AR wrench and see if it fits. thanks.

Santa said to buy the tools. Does anybody know if a standard AR barrel wrench will fit a DPMS LAR-308? I think the barrel manufacturers should put a slight chamfer on the entrance to the chamber to guide the cartridge into the chamber. Especially when the end of the barrel's entrance to the chamber is smaller than the exit of the receiver. I have a good shop and will chuck the into my drill press and slowly cut a small chamfer. Will post results so maybe it helps others. Thanks to all who have tried to help me. Joe

Thanks to the "specialist" for the photos and reply. The rifle is all stock, I know the guy I bought it from. The feed ramps like shown on the photos are OK. The problem is in the entrance to the chamber near where the head seats. There is a ridge or seam that protrudes and I think that is what is catching on the brass. It is along the entire circumference of the chamber about an 1/8" from the opening. Almost like where the barrel fits into another part. I do not have the tool to remove the barrel nut to see for sure. I took your advice and posted some info on the introduction page. And I will get some photos out when I get some time. To the person with the Creedmore, no I still haven't figured it out yet. I think it was a problem from the initial manufacturer of the barrel. It looks like the end of the barrel needs a bit of chamfering just like a case neck when you are seating a bullet. If I get no other suggestions I will break down and buy the tool, pull the barrell and chamfer just a tad off that ridge. thanks again, Joe

Hello, My name is Joe and I am a lifelong hunter, shooter, collector, reloader, amateur gunsmith and retired FFL dealer. I contacted the Forum about a feed problem I have with a used DPMS AR-10 that I just acquired and just can't seem to figure out. I have posted about the issue I am having. I own, shoot, and have sold used and surplus rifles for decades. So I may be of help on US Military rifles from trapdoors thru Garands. Hope to help others and get some help as well. Thanks for the nice forum.

I just acquired a used but like new DPMS LR-308 Ser,# 170XXX. I have tried LC match, new Federal and Winchester ammo with the same feed problem. Most of the rounds go about half way into the chamber and stick there. The forward assist will not push the the rest of the way in. When extracting the live round I see shaving and scuffing at about 3 to 6 o'clock on the case about half way down the case as viewed from the rear. The rifle is clean and well oiled with no apparent wear. When I inspect the chamber it appears that the chamber opening has a protruding edge around the chamber near where the cartridge head would seat. That ridge is all that I can see that could be causing the shaving. I called DPMS as the previous owner said he shot it little and had problems. But DPMS did not want to do much but sell me another barrell. Any one else had this problem? Any suggested solutions?

I just bought a DPMS LR-308 from someone who bought it years ago and did not shoot it. When I shot it the rifle failed to feed about 2 out of 3 rounds. The cases stuck about 2/3 's of the way into the chamber and the bolt would not close even with the forward assist. I tried new commercial and military grade ammo. DPMS metal mags, aftermarket metal mags, and MagPul P mags. Always the same result. The cartridges hang up entering the chamber and shave brass off the rear of the case from the 3 o'clock to 6 o'clock positions about half way down the case. I pulled the rifle down and it appears that the end of the barrel is a bit bigger diameter than the receiver resulting in a small lip or ridge where the barrel meets the receiver. That lip you can feel with your finger and appears to be causing the brass to shave and the cartridge to not feed fully into the chamber. I called DPMS and they would not help due to the age of the rifle. They said that the barrel would need to be replaced by one of their outside service centers. It appears to me that all that is needed is for the barrel to have a small camfer at the very end of the chamber where the cartridge enters. Just enough to smooth out the existing lip where the brass shaves. No different than camfering the end of a cartridge to accept a bullet during reloading. Has anyone else encountered this problem? Any suggestions as to how to fix this other than replacing the barrel? Any gunsmiths out there that can camfer this barrel? Thanks, Joe