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Started By
Message
re: ***UPDATE NO.3**My new AR is cycling .223 fine but hanging up on 5.56
Posted on 1/22/15 at 7:26 am to Clames
Posted on 1/22/15 at 7:26 am to Clames
quote:
Compare the springs to see if you got one that is noticeably shorter
I did compare springs and mine was approx .50" longer. I didnt put a scale on it to find out exact length, but it was in fact longer than the spring that was in rifle no.2
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Posted on 1/22/15 at 7:53 am to dnm3305
does your upper have the M4 feed ramps? Have you checked to see what they look like?
Posted on 1/22/15 at 7:59 am to meauxjeaux2
I will check that this evening, it's not very visible in the pic I posted of the chamber in OP.
Posted on 1/22/15 at 8:03 am to dnm3305
also check the gas tube on the top of the BCG. My gas tube from PSA on my BCG came lose because of improperly staked allen head bolts.I took my gun over to Meaux's Guns and he got it straight for me.I really didn't want to send my gun back to PSA
Posted on 1/22/15 at 8:05 am to meauxjeaux2
quote:
also check the gas tube on the top of the BCG. My gas tube from PSA on my BCG came lose because of improperly staked allen head bolts.I took my gun over to Meaux's Guns and he got it straight for me.I really didn't want to send my gun back to PSA
I did that before I even fired a single round, and have checked that about 5 times since then. I dont want to send it back to PSA either, but it's a problem they should take care of. Ive done everything I can to try and figure this out.
Posted on 1/22/15 at 8:07 am to dnm3305
if you don't have feed ramp issues then my money is on improperly aligned gas tube.The .223 rounds do not create as much pressure as the 5.56 round do and if all of the gas is not getting to the BCG properly then you're going to have issues with the round that needs it the most and that's the .223
BTW- Are you shooting factory load 5.56 or reloads?
BTW- Are you shooting factory load 5.56 or reloads?
This post was edited on 1/22/15 at 8:15 am
Posted on 1/22/15 at 8:14 am to meauxjeaux2
quote:
BTW- Are you shooting factory load 5.56 or reloads?
Factory loads. Ran American Eagle, Independence, Winchester white box yesterday. All functioned perfect through rifle no.2 and not through mine.
quote:
The 5.56 rounds do not create as much pressure as the .223
Are you sure you dont have this backwards? And what would this have to do with a round not firing even after a clean primer strike?
Posted on 1/22/15 at 8:15 am to meauxjeaux2
quote:
then you're going to have issues with the round that needs it the most and that's the .223
That's not at all the case. .223 is running fine, 5.56 does not function.
Posted on 1/22/15 at 8:24 am to dnm3305
quote:i did and edited. Sorry.
Are you sure you dont have this backwards?
If you swapped out BCG's with a running gun and it still did that then there is a gas issue.Whether it be alignment of the gas tube,or blockage further down the barrel. Did you completely clean out all of the packing grease in the gun before firing it. PSA sends their stuff pretty greased up.
This post was edited on 1/22/15 at 8:26 am
Posted on 1/22/15 at 8:30 am to meauxjeaux2
Have you tried putting his lower on your upper and see if it is the hammer spring? If that results the same it must be the gas tube or barrel. Though I'm not an expert so take it with a grain of salt.
Posted on 1/22/15 at 8:30 am to meauxjeaux2
quote:
Did you completely clean out all of the packing grease in the gun before firing it. PSA sends their stuff pretty greased up.
They would put packing grease down the barrel and gas tubes? If they did, then no, I didnt clean down the gas tubes. I dont see how a lower pressure .223 would run just fine and a higher pressure 5.56 would not only not run but would not fire after being struck. I dont get how that could be a gas issue?
Posted on 1/22/15 at 8:32 am to dnm3305
no,not grease in the gas tubes. And hey man,take this for what it's worth. I'm no expert either and am just getting into these guns myself.Only thing we have in common is we both have PSA builds.I'm just reiterating conversations i'm seeing on the internet tbh.
OHH and in my interwebs scouring i happened to come across this Adjustable gas block
OHH and in my interwebs scouring i happened to come across this Adjustable gas block
This post was edited on 1/22/15 at 8:36 am
Posted on 1/22/15 at 8:34 am to dnm3305
quote:
And what would this have to do with a round not firing even after a clean primer strike?
It may look like a clean primer strike to the naked eye, but if it was, it would've went boom.
Posted on 1/22/15 at 8:39 am to SportTiger1
quote:
It may look like a clean primer strike to the naked eye, but if it was, it would've went boom.
I wonder if that could vary due to ammo? In the updated pic I posted, the unfired round honestly seemed to be struck the best.
Posted on 1/22/15 at 8:42 am to dnm3305
I still want to see pictures of the fired brass from your rifle. Have you taken a chamber brush and solvent and scrubbed the hell out your rifle's chamber? I'm wondering if there is a burr that is preventing 5.56 ammo from fully chambering, going in enough to go into battery but just a few thousandths short such that when the firing pin strikes it sets the round forward a tiny bit and takes away the energy needed to ignite the primer. That burr would also cause extraction issues that works result in the feeding issues you have described.
Posted on 1/22/15 at 8:50 am to Clames
quote:
I still want to see pictures of the fired brass from your rifle. Have you taken a chamber brush and solvent and scrubbed the hell out your rifle's chamber? I'm wondering if there is a burr that is preventing 5.56 ammo from fully chambering, going in enough to go into battery but just a few thousandths short such that when the firing pin strikes it sets the round forward a tiny bit and takes away the energy needed to ignite the primer. That burr would also cause extraction issues that works result in the feeding issues you have described.
Yes I sure did. As for as a burr and what you are describing, that sounds very logical. I need to get a magnifying glass and closely inspect it to see if there is anything sharp or protruding and is obvious. As far as pics of the spent brass, are you talking about taking side profile close up pics of the rim of the casing? Im assuming youre wanting something different than the pics in the OP?
Posted on 1/22/15 at 8:57 am to dnm3305
Could this be a possibility as well? It seems this could also explain the seating issue I was having.
Square-edged ejector issue
In one of the pics posted in the OP, it appears that my ejector on the bolt is fairly sharp.
Square-edged ejector issue
In one of the pics posted in the OP, it appears that my ejector on the bolt is fairly sharp.
Posted on 1/22/15 at 9:00 am to dnm3305
are you having issues with ejecting or just chambering/cycling?
Posted on 1/22/15 at 9:01 am to meauxjeaux2
quote:
are you having issues with ejecting or just chambering/cycling?
Chambering/cycling only. Every fired round through the rifle has ejecting.
Posted on 1/22/15 at 9:04 am to dnm3305
where are you located OP?
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