Problem with my AR

[gsc3zny]

First, its not an 80%, it was fully machined. yes, I assembled it using standard LPK and buffer, etc. I purchased a pre assembled upper, including BCG. Now for the problem. It feeds and fires factory ammo, just fine. fires and ejects just fine. My own reloads are the problem. I have them at 2.20"oal using 16 grains of IMR 4227, there are a couple of other recipes with the same problem The problem is when I charge the gun, the round goes in the BCG just fine, but when i pull the trigger, it just clicks, then I cant eject the round or pull back the charging handle. I have to take the lower off, and pry back the BCG, then the round ejects. Does the way I'm describing it make sense?

[maxx03]

Sounds like a sizing, headspace issue. Have you put the resized cases in a case gauge?

[baih777]

Sounds like a sizing, headspace issue. Have you put the resized cases in a case gauge?

^^^^^ I doubt the round is going in all the way because the case is not sized correctly.

[gsc3zny]

^^^^^ I doubt the round is going in all the way because the case is not sized correctly.

Here is my process
lube/decap/resize first
Wet tumble
Trim/chamfer/deburr
Load
Using Lee Dies
using either Winchester or CCI SRP

[bender152]

Same thing happened to me when I failed to resize my brass properly. I didn't have the die set deep enough and because of that, I was not bumping the shoulder back far enough.

OP, do you have a case gauge to test your resized cases?

[kkritter]

I had the exact same problem. I also had a Mossberb MVP that wouldn't chamber my reloads either. Used a Hornady .308 die. Tried the RCBS small base die, no help. Rounds wouldn't chamber or get stuck in the LR308 and I couldn't close the bolt on the Mossberg. I was playing around with the Mossberg and brass casings one night and measured brass that would chamber and brass that wouldn't and discovered the shoulder measurements were slightly different. Using a .223 shell holder with the brass sitting on top of it, I set up a Redding trim die to just touch the shoulder of the brass. Then adjusted it to just barely bump the shoulder, not more than a thousandth or 2. Then tried to chamber the brass. That's all it took for both the Mossberg and LR308. I bumped 100 pieces of already reloaded rounds that I couldn't close the bolt on and all fired flawlessly. I don't know if the chambers in the 2 rifles are too tight or both .308 dies are out of specs but that solved the problem for me. And yes, when resizing the brass I cammed over on the die, almost to the point I was afraid the die might break trying to get it to work.

[jericho89]

Had the same problem and it was because the gun was not going into full battery. It would be close and I found out that the chamber was too tight (the one I was dealing with would do that with all ammo). As stated above you have a sizing issue. Either your rounds are out of spec or you have a tight chamber that does not allow for much variation from factory ammo. Make up a dummy round with no powder and primer and try to cycle your gun. I would just about guarantee you that you will have to pry the round out. Check the case for where it is catching (you should see the scratching on the case). It will let you know if you are tight near the base, center, or neck. The one I was dealing with was near the base and the chamber needed to be reamed to spec.

[gsc3zny]

Same thing happened to me when I failed to resize my brass properly. I didn't have the die set deep enough and because of that, I was not bumping the shoulder back far enough.

OP, do you have a case gauge to test your resized cases?

I have a case length guage where you drop the round in to check length. Is that what you mean?

[jericho89]

That is what he was referring to. Drop one in and see if you are too long. I did the same thing and if it passes that test then you need to thing too wide.

[Metal God]

When you pull the two half's apart . Is the BCG sticking out from the back of the upper just a tad or is it flush with the back of the upper ?

[xfer42]

This would happen on 1 out of 10 .223 rounds that came out of my Lee Loadmaster and RCBS Small Base die. The shell plate couldnt mash the case in far enough and the case gauge would show that the shoulder wasnt bumped far enough back. Using the same die on my XL650, and I can clearly see the difference with the gauge (plus I can eject all rounds fired or not).

[gsc3zny]

Same thing happened to me when I failed to resize my brass properly. I didn't have the die set deep enough and because of that, I was not bumping the shoulder back far enough.

OP, do you have a case gauge to test your resized cases?

I install the die until the base hits the shell holder, then run it up, removing the primer and resizing it

[h.charlie]

Any strike mark on the primer? Or any other signs in the case after you get them out?

[gsc3zny]

When you pull the two half's apart . Is the BCG sticking out from the back of the upper just a tad or is it flush with the back of the upper ?

Bcg sticking out about 1/8 inch

[gsc3zny]

Any strike mark on the primer? Or any other signs in the case after you get them out?

No, no marks whatsoever