AR-15 BCG UN-STUCK!

andy t said:
vellnueve, are you running your rifles well lubed and still having issues?
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Yes, and remember this is THREE separate shooters with SIX separate rifles, including a YHM and a Colt 6920. And this morning at a carbine match another shooter noted that he was having similar issues with the ammo. I believe he said he was shooting a Noveske.
 
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Using a chamber reamer on a chrome barrel will remove some chrome thats about it. Its a common fix for AR's that have chambers not in spec. When I was at Colts armores classs last year several people in the class had non Colt guns with tight chambers. All were fixed using a chamber reamer. The one we used was made by Michiguns. Ned Christianson. YMMV

What about chromed-lined chambers? The good news is that in my experience, Colt AR15 chromed barrels have a proper 5.56 chamber. I would consider most others to be suspect. The reamer has been subjected to a secondary heat-treating process, titanium carbo-nitride, which makes it capable of correcting under-spec chromed chambers. Obviously it will do fewer of them, but I have yet to hear of one of my reamers geting dull-- and my personal one has done at least a few dozen chromed chambers. Will removing the chrome be a problem? No. Plenty of AR's don't have chromed bores and chamber and they work fine. I've sectioned some chromed barrels and the chrome doesn't last that long in the throat area anyway. Removing chrome in the chamber won't cause the area to peel like bumper chrome.
 
What about chromed-lined chambers? The good news is that in my experience, Colt AR15 chromed barrels have a proper 5.56 chamber. I would consider most others to be suspect. The reamer has been subjected to a secondary heat-treating process, titanium carbo-nitride, which makes it capable of correcting under-spec chromed chambers. Obviously it will do fewer of them, but I have yet to hear of one of my reamers geting dull-- and my personal one has done at least a few dozen chromed chambers. Will removing the chrome be a problem? No. Plenty of AR's don't have chromed bores and chamber and they work fine. I've sectioned some chromed barrels and the chrome doesn't last that long in the throat area anyway. Removing chrome in the chamber won't cause the area to peel like bumper chrome.[/QUOTE]
 
stinx said:
What about chromed-lined chambers? The good news is that in my experience, Colt AR15 chromed barrels have a proper 5.56 chamber. I would consider most others to be suspect. The reamer has been subjected to a secondary heat-treating process, titanium carbo-nitride, which makes it capable of correcting under-spec chromed chambers. Obviously it will do fewer of them, but I have yet to hear of one of my reamers geting dull-- and my personal one has done at least a few dozen chromed chambers. Will removing the chrome be a problem? No. Plenty of AR's don't have chromed bores and chamber and they work fine. I've sectioned some chromed barrels and the chrome doesn't last that long in the throat area anyway. Removing chrome in the chamber won't cause the area to peel like bumper chrome.[/QUOTE

QUOTE=stinx;2021082]Using a chamber reamer on a chrome barrel will remove some chrome thats about it. Its a common fix for AR's that have chambers not in spec. When I was at Colts armores classs last year several people in the class had non Colt guns with tight chambers. All were fixed using a chamber reamer. The one we used was made by Michiguns. Ned Christianson. YMMV
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vellnueve said:
Yes, and remember this is THREE separate shooters with SIX separate rifles, including a YHM and a Colt 6920. And this morning at a carbine match another shooter noted that he was having similar issues with the ammo. I believe he said he was shooting a Noveske.
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what do you suspect to be wrong with the ammo? Shoulder height? Diameter?

Would it be easily measured with calipers?
 
Maybe all these manufacturers should buy a chamber reamer from Brownells so they can finally turn out in spec barrels. Why barrels leave the factory and need to be reamed to work is beyond me.
 
flintoid said:
what do you suspect to be wrong with the ammo? Shoulder height? Diameter?

Would it be easily measured with calipers?
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I don't think it's anything dimensionally wrong with the ammo. My theory is that:

1) Most cheap steel-case ammo is underpowered (low pressure)

2) Steel cases don't expand as readily as brass cases do. This allows some carbon residue directly into the chamber at the time of firing.

2.2) The powder that the Russian companies use burns wicked dirty.

3) Even with the lacquer/polymer coating and chrome-lined chambers, I'd be willing to bet that most steel cases' coefficient of friction is higher than that of a brass case.

I think the combination of all these factors leads to the majority of people's issues with steel case ammo. You increase case/chamber friction while decreasing gas pressure, and it's not going to work as well as something with less friction and more pressure.


I've never had any problems running brown bear in my Spikes midlength, but my Colt rifle wouldn't run it for anything.

Delta Elite said:
Maybe all these manufacturers should buy a chamber reamer from Brownells so they can finally turn out in spec barrels. Why barrels leave the factory and need to be reamed to work is beyond me.
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$$$$

If they're selling enough product to make the amount of money they want to, why would they change anything?

Just buy from a mfr that doesn't suck.
 
Time to check the suspect ammo
get the mic and dial cals out, check dimensions before and after shooting. Run them over a crony and see if there is a big drop in velocity between the ammo used ?

I hope you don't have a lot of this ammo, at least wolf offers a 100% satisfaction guarantee. You dont like it they refund the unused portion. Turn around time was about 5 weeks for my refund. They picked up shipping also.
 
My chrome BCM eats anything I throw in it and I throw a lot of Tula and Wolf. No issues. Ream the chamber and keep your gun dripping wet.
 
flintoid said:
That is complete bullshit.how do they set your headspace when they didn't machine your parts?

You have chamber issues with cheap steel cased ammo.
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Supermoto said:
Rainier probably checked the headspace when they sent the matched bolt and barrel.
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Yes, I'm sorry, I mis-spoke, they checked the headspace for the bolt and barrel at the time of order.

mac1911 said:
im going to go out on a limb...........
Did you clean the upper I MEAN REALLY CLEAN IT. before assembly and test fire. I am no expert on ARs. but have put together 6 in the last 2 years. All the parts and uppers I recieved where in my eyes,,,frign DIRTY from a sticky anti corrosion type of film to metal bits left over from machine work right out of the box. New guns and parts are not clean. Also most anti corrosion crap they put on is not a lube.
From my youth.....my dad always told me after I cleaned any of my guns, clean it again.
Now Im not one for strict cleaning. I do a quick wipe,bore snake and light lube after a range trip with my ARs. I have a franken built parts sourced from everywhere AR it has eaten nothing but wolf the new stuff and old greenish laquer stuff going on 2k plus rounds now. I have been lucky and only run into bad magazines and some dead primers. yet to have any wolf jam in my chambers. Mind you non of my ARs or my skills for that matter are for long distance shooting.
I personally would clean the begeez out of your rifle, get a good chamber brush and try again.
PS if your building a AR for accuracy then you must use accurate ammo, wolf is not.
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Yes, I cleaned it and lubricated it before shooting, as I do with all my guns, built or bought.

After the stuck BCG issue I had taken the rifle up to Maine, I cleaned and lubed it again and found a rather large amount of carbon build up on the back of the bolt, just behind the gas rings and on the back end of the firing pin, so I scraped that off and lubed everything up. Ran through 150 or so rounds of American Eagle 55 grain with no problems to speak of.

I have 400 rounds of Remington UMC on stand by for the next range trip, but I don't think that will give me any trouble. [knock on wood]
 
meth0d said:
After the stuck BCG issue I had taken the rifle up to Maine, I cleaned and lubed it again and found a rather large amount of carbon build up on the back of the bolt, just behind the gas rings and on the back end of the firing pin, so I scraped that off and lubed everything up. Ran through 150 or so rounds of American Eagle 55 grain with no problems to speak of.
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Carbon on the tail of the bolt doesn't effect reliability.
 
meth0d said:
Yes, I'm sorry, I mis-spoke, they checked the headspace for the bolt and barrel at the time of order.



Yes, I cleaned it and lubricated it before shooting, as I do with all my guns, built or bought.

After the stuck BCG issue I had taken the rifle up to Maine, I cleaned and lubed it again and found a rather large amount of carbon build up on the back of the bolt, just behind the gas rings and on the back end of the firing pin, so I scraped that off and lubed everything up. Ran through 150 or so rounds of American Eagle 55 grain with no problems to speak of.

I have 400 rounds of Remington UMC on stand by for the next range trip, but I don't think that will give me any trouble. [knock on wood]
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Carbon on the back of the bolt is irrelevant. The reason your rifle shot fine is because it was shooting American Eagle.

I wish Silver Bear was as cheap as Wolf/Tula.
 
flintoid said:
I'm looking at prices shipped to my door, and I'm seeing a $7 difference in lots of 500.

And would a zinc plated steel case seriously fair better than laquer/polymer coated steel in regards to this problem?
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I've never had a failure with Silver Bear except for one case that didn't have a flash hole.
 

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