Just finished up a second build and bolt won't full close with a round in it. Bolt closes fine by it's, but with a round in it, won't fully chamber and gets locked up. It's a new DPMS .223 barrel with a spikes nickel boron bcg. Any ideas?

What ammo are you using? 5.56?

Did you try multiple rounds? Does the bullet fully seat? Is there any obstructions in the chamber? Hiker brought up a good point, is it a .223 only barrel?

I'm using Remy .223. Everything looks clean n clear. Yes the round doesn't seem to be fully seating. I chamber's fine without a round, so I'm thinking might be the barrel. Doesn't make any sense though.

Headspace issue?

Headspace issue?

 

Interesting, maybe the throat is out of spec.. do you have another Ar barrel to compare the seating depth to?

Ran a boresnake threw it a few time and got a piece of flake out of it. Looks like some of the coating off the ar wrench I bought from amazon. It had come in all chipped and bubbled from rust. She seats fine now.

Return that wrench and get the dpms, its powder coated. Amazon will take it back even if the seller won't, that's unacceptable.

WOW! How did that get in the chamber? I think it is prudent, as always, to give that rifle a good cleaning, degreaing and relubing before firing.

 

GOOD LUCK!

 

 

WOW! How did that get in the chamber? I think it is prudent, as always, to give that rifle a good cleaning, degreaing and relubing before firing.

 

GOOD LUCK!

 

Exactly... I was actually just checking with a piece of .223 brass to see if the rifle chambered smoothly and easily. Now that it's all set, I can do a full cleaning and lube. Taking her out to SGSC tomorrow after work for some test firing.