DPMS Panther Flat-Top AR in .204 Ruger

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jef3

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Hi everyone,

I am new to the firum and I have a problem that I hope someone can help me with.

Not long ago I purchased a DPMS Panther Flat-Top AR in .204 Ruger[/B]. It has a free floated 24 in. stainless fluted barrel, Jard trigger, tactical charging lever, bi-pod stud, Hogue grip, a Skeleton stock, with Barska 8-32 x 50 illuminated, parallax adjustable scope. I thought that it might make a fun varmint gun, being semi-automatic. It will not shoot, however. I have tried BL-C(2), H322, Benchmark, CFE-223, as well as a number of other powders. I have prepared and carefully shot both Berger 35 gr. and Hornady 32 gr. bullets with all of these powders, and still no load that will shoot anywhere near 1.00" consistently. Most loads are shooting around 1.5" to 2.5". There have been some groups in the 0.650 area, but they have not been repeatable. This is the worst shooting rifle that I have ever owned. I have been a reloader for over half-a-century, a successful benchrest shooter, shot on the U.S Olympic Team, and am a gunsmith who builds custom benchrest rifles and very accurate varmint and tactical rifles. I do not, however work on AR type rifles. In fact, I know very little about them. I only give you this background so that you will not assume that it is my reloading technique or my shooting ability. The last rifle that I built, a 20 VarTarg, shoots everything at or below .250", and many groups under 0.100.

My question is whether any one else out there is having accuracy problems with their DPMS rifles. I do not know what else to try. I have checked the throat and the headspace and found both to be fine. I have changed scopes with no luck. The only thing that I have not yet done is to change barrels.

Any ideas would be appreciated.
 
Welcome Jef.
A buddy has one - bought the upper half at a gun show several years ago. I've played with it some and ran 100 rounds thru it on a prairie dog trip a couple of years ago. That one shoots great. I don't think he did much load work up on it, just tried what he was loading for bolt guns.
You might check the crown and the barrel nut torque.
 
I have checked the crown and the entire bore with my bore scope, but have not yet checked the torque on the barrel nut. That is a good idea, and I will do so tomorrow. Thanks for the idea.
 
Sounds like mine. I couldnt get mine to shoot either so I sent it back to DPMS. They said they put on a new barrel but I havent shot it yet. If it doesnt shoot any better than the targets they sent back with it, It's going up for sale!
 
Yup, I think that I will give mine a one way ticket to a gun show. Let me know how yours shoots with the new barrel. I might just have to try a new Lilja barrel and see if it will shoot with that.
 
Can ya' borrow a friend's rifle, & see how they do when you swap uppers? Would be interesting to see his upper on your lower w/ that trigger. Is there any flex between your upper & lower?

ARs are a lot like Legos - but more accurate. You'd expect quite a bit more out of a 24" bbl - unless it's not torqued right. You might take a stroll over to a less refined but more specialized forum if your issues continue.

How far is she throwing brass?
 
That is a great idea backbencher. It should tell me whether a new Lilja barrel should solve the problem or not. Thanks
 
have you triedloading rounds straight in one at a time? I heard rumors that .204 don't like ar mags yet? out side of that? if the upper is right to the lowe, the muzzle break isn't over tight, and the scope ia only mounted to the upper receiver and not a handgaurd rail. have you tried any factory ammo ? what about the gas block, is it straight and tight?
 
My first step would be to ditch the hand loads for a time and try some factory ammo, see what that does before automatically blaming the rifle.
 
The neck tension is about ideal, and I use only redding's best dies.
 
I will try factory loads, but I have never seen a rifle that will shoot better with factory loads than with carefully prepared hand loads.
 
Neither have I, but different brass, different bullet, different powder, it could give you enough info on the rifle to help you get the accuracy, if the potential is there
 
Thanks everyone for your help on this thread, but I have found the likely problem. The bore is probably the roughest factory bore that I have ever seen. It has chatter marks all the way from the chamber to the crown. In addition, the chamber is just a little crooked. I slugged the bore and found that there are some wider and narrower spots in it. So I will call my friend, Dan Lilja, this AM and order a barrel. Thanks again
 
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