BCG gets stuck forward with live round chambered... AR10

[HRnightmare]

I have an AR10, an AR version of the .308.

I have never fired it but I have tested the function of it and when I charge it and a live round goes into the chamber it often times is impossible to charge the handle again to remove the round. I have used two hands and rested the buttstock against my chest and still cant pull it open. I have to seperate the pins and drive the BCG back with a wedge and rubber mallet.

Occasionally I can charge the handle with a round chambered but when I do the round almost never ejects and it causses a double feed.

The ammo is Winchester Gold Match manufactured by FreedomMunitions

Is it most likely that this is a BCG problem or the ammo casing is too fat?

 

[rcmodel]

1. To get a stuck round out.
Collapse the stock hold pressure on the OP handle, and slam the butt on the ground.
Inertia of the BC will yank the tightest round out.

2. It is very likely the reloaded ammo is out of spec.
Either due to improper resizing? Or shoulders are buckled due to improper crimping.

3. Color a tight round with a magic marker and try to chamber it.
Where the marker rubs off is where it is tight.

4. You don't have a rifle problem until it does the same thing with name brand factory ammo.
And I doubt it will.

rc

 

[HRnightmare]

It is putting scratches into the neck of the casings... The only mags I have to test are a 10rd and a 20 rd PMAG.

Could it be my extractor is no good? How about my rifle doesnt like Pmags?

rifle has never been dry fired...

 

[Jackal]

You need to mortar it to clear it (look it up online). I'd look into chamber crud too.

 

[Caliper_Mi]

It is putting scratches into the neck of the casings... The only mags I have to test are a 10rd and a 20 rd PMAG.

Could it be my extractor is no good? How about my rifle doesnt like Pmags?

rifle has never been dry fired...

The extractor sounds like it's working great - it's holding the rim, but the round is stuck. Scratches in the neck of the casing sounds like an issue. I'd mic the ammo and see if the size of the neck meets SAMMI spec. If the ammo is in spec, it may be time to have a gunsmith or the manufacturer look at the barrel.

Have you tried any other brands of ammo in the rifle?

 

[moxie]

As rc suggested, you need to try it with name brand new factory ammo. Take it from there depending on results.

 

[Plinkin' Logs]

Did you have to use the forward assist to seat the round or did it chamber itself?

 

[OilyPablo]

I should begin this by suggesting you have your chamber professional gauged.

Probably a classic tight chamber. Before you have the chamber reamed, clean it like a mad mad man with a bronze brush and Hoppe's or even just gun oil. Repeat then mop and dry.

Now shoot the gun. Sounds unprofessional but the above worked for me!

If it hangs up, then see a pro to check your chamber.

 

[Eb1]

I would do you some good to get one of these.



also, I'd do as rcmodel suggested, and use a round from the very well known 3 manufacturers that start with R, W, or F.

 

[HRnightmare]

I am able to get the round out by dropping the lower and forcing the bolt back with a dowel rod. I tried another box of the same ammo and it still got stuck but not nearly as bad. I'm going to go buy another brand ammo.

 

[bfoosh006]

Wise choice.. sounds like the ammo was not properly resized or trimmed.

 

[dogmush]

Just out of curiosity, is this the same gun that a BCM charging handle won't work in?

 

[MachIVshooter]

Go shoot it. I've had more than one AR (both 5.56 and .308) that behaved this way before firing, but they ran fine, and hand cycled easily after a couple of mags.

New parts can be very tight, but they will self clearance. Ever try to turn over an engine that was just assembled with all new rings, springs and bearings?

 

[rodregier]

Ammo issue or crud in the chamber would be my guess.

The cartridge gage suggested earlier reduces the possibility of an ammo issue.
(It mimics the dimensions of a chamber). I use one to check all my ammo, factory
or handloaded.

 

[G.barnes]

What brand is the gun/barrel?

 

[joem1945]

Second the suggestion to really clean the chamber before going any further. Might be some protective oil film in the barrel and chamber.

 

[Elkins45]

Go shoot it a few times and see what happens.

 

[HRnightmare]

It's a PSA upper / lower with a Rainier Arms super match grade barrel . My gunsmith recommended shooting it as well.

 

[BSA1]

I'm missing something here.

What is the point of chambering live ammunition if you don't intend to shoot it? Just where are you at when you are chambering and then banging you gun around trying to remove the stuck live round?

 

[HRnightmare]

I'm doing it in a safe manner, in a safe direction with safety gear... internet safety cop does nothing to help...

 

[HRnightmare]

Seems the last page of your posts are of the same style and nature. Criticizing peoples questions and decisions.

 

[243winxb]

I would only shoot it if a difference brand of ammo chambers and ejects correctly.

 

[G.barnes]

Get some factory ammo. If it doesn't change contact rainier and ask them what to do. If they say shoot it then shoot it, they may have you send it back. You don't want to risk damaging anything, especially on a barrel that expensive.

 

[rjrivero]

Did you scrub the chamber and clean the bore prior to chambering your ammo?

It's not unusal to have cutting oil, or some other residue in the chamber that can cause some binding of a round. I like to scrub the chamber, and clean/oil the bore prior to shooting any new rifle/build.

Testing a box of factory loaded ammo is definately a good idea to get you peace of mind, but checking the headspace with go/no go guages is really what you want to do if you have significant concern.

I just finished shooting a Precision Rifle class with Freedom Munitions 175gr Remanufactured ammo, and over the chronograph, the Standard Deviation was 13fps. I had absolutely NO issues with the ammo at all this weekend.

 

[dogmush]

It's a PSA upper / lower with a Rainier Arms super match grade barrel . My gunsmith recommended shooting it as well.

So the same gun won't fully chamber a round, and won't cycle without tearing up a charging handle?

It sounds like something is pretty far off with that upper. I wouldn't shoot it until I got it to cycle properly.