02-27-2011, 00:52
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#1
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Asset
Join Date: Feb 2011
Location: Oregon
Posts: 32
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.223 problems
Seeking advice from those who may be more experienced than myself.
Went shooting today with my AR-15 and 160 rounds of ammo. Only 151 of the rounds fired.
All have dimpled primers though the dimples dont look as deep as those that did fire.
Brand new Federal ammo
Is it the rifle or the ammo? Never had a problem with my AR yet.
Thanks to all for helping me with this issue.
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Spitfire34 is offline
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02-27-2011, 03:45
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#2
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Quiet Professional
Join Date: May 2010
Location: NC/Baghdad, Iraq
Posts: 474
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Trying to analize your problem brings up several questions. How many rounds have been through your rifle? Is this all one lot from Federal or multiple lot numbers? Have you shot this ammo and lot number before? Is the rifle clean? Firing pin channel clean? Lastly did you try any other ammo since this?
On the top sounds like a ammo problem and would call Federal with the lot number if it is the ammo.
CD
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Combat Diver is offline
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02-27-2011, 09:58
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#3
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Quiet Professional
Join Date: Jan 2004
Location: Free Pineland
Posts: 24,780
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Possibly bolt not fully going into battery. Hammer energy is being sapped driving the bolt home.
Same questions as CD. Plus what are you using for lube on the BCG, where and how much?
All rounds chambered in an AR will likely show some primer marks due to the fact that the firing pin is inertial and strikes the primer during chambering. Military primers are harder for a reason.
TR
__________________
"It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat." - President Theodore Roosevelt, 1910
De Oppresso Liber 01/20/2025
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The Reaper is offline
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02-27-2011, 14:42
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#4
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Quiet Professional
Join Date: Dec 2010
Location: ISO
Posts: 297
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A bunch of good questions above.
I would add have you cleaned the weapon?
Did you try to rechamber and fire any of the rounds? If so did they go off the second time?
Was it throughout the string at the beginning or end?
Have you checked the hammer spring? Is this a new weapon?
Lots of variables at this point.
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MK262MOD1 is offline
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02-27-2011, 16:42
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#5
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Quiet Professional
Join Date: Jan 2004
Location: Phoenix, AZ
Posts: 20,929
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Makes me wonder if the hammer spring is in backwards.....
Unless we see the rifle all we can do is speculate.....
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"The Spartans do not ask how many are the enemy, but where they are."
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Team Sergeant is offline
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02-27-2011, 17:37
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#6
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Asset
Join Date: Feb 2011
Location: Oregon
Posts: 32
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The FTF's happened randomly throughout a string of fire with a beta mag. Same lot of ammo.
The rifle was clean when I started, I use CLP on my BCG...it wasnt soaked but it was wet.
I built the rifle myself and have put about 3,000 rounds through it without failure.
I didnt rechamber the FTF rounds and try to fire them again...probably should have.
I sent Federal an email notifying them about the issue.
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Spitfire34 is offline
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02-27-2011, 18:32
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#7
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RIP Quiet Professional
Join Date: Jun 2009
Location: The Ozarks
Posts: 10,072
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Quote:
Originally Posted by Spitfire34
The FTF's happened randomly throughout a string of fire with a beta mag. Same lot of ammo.
The rifle was clean when I started, I use CLP on my BCG...it wasnt soaked but it was wet.
I built the rifle myself and have put about 3,000 rounds through it without failure.
I didnt rechamber the FTF rounds and try to fire them again...probably should have.
I sent Federal an email notifying them about the issue.
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1. Shoot another brand.
-If still a problem, then:
2. Clean and fire again.
-If still a problem, then:
3. Troubleshoot according to the TM.
__________________
"There you go, again." Ronald Reagan
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Dusty is offline
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02-27-2011, 19:54
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#8
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Quiet Professional
Join Date: Jan 2004
Location: Free Pineland
Posts: 24,780
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Quote:
Originally Posted by Spitfire34
The FTF's happened randomly throughout a string of fire with a beta mag. Same lot of ammo.
The rifle was clean when I started, I use CLP on my BCG...it wasnt soaked but it was wet.
I built the rifle myself and have put about 3,000 rounds through it without failure.
I didnt rechamber the FTF rounds and try to fire them again...probably should have.
I sent Federal an email notifying them about the issue.
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Has it worked with that BetaMag before?
TR
__________________
"It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat." - President Theodore Roosevelt, 1910
De Oppresso Liber 01/20/2025
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The Reaper is offline
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02-27-2011, 20:03
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#9
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Asset
Join Date: Feb 2011
Location: Oregon
Posts: 32
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The beta mag in question has always worked properly and isnt very old. I cleaned the weapon today and can find nothing out of order. I'm thinking it was the ammo but I'd hate to find out its the rifle.
TS...all the parts are installed correctly, I used to build these for a living
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Spitfire34 is offline
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02-28-2011, 09:52
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#10
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Quiet Professional
Join Date: May 2010
Location: NC/Baghdad, Iraq
Posts: 474
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Go shoot some different ammo. If no failures then ammo related. You can try the same ammo again also since you cleaned the weapon. You should be able to trouble shot and figure it out then.
CD
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Combat Diver is offline
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03-01-2011, 04:11
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#11
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Guerrilla
Join Date: May 2010
Location: Wisconsin BCM territory
Posts: 152
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Let me throw this out there. You built this yourself so its' an AR Frankengun. Here are few things.
1. Will it work with regular magazines?
2. What components did you use to build this?
3. Did you check things like firing pin protrusion, headspace, etc...
4. Are you absolutely sure that the hammer spring is installed properly?
Is it possible that this ammo was subjected to less than ideal conditions?
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Iraqgunz is offline
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03-01-2011, 09:00
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#12
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Guerrilla
Join Date: Apr 2009
Location: BFE PA
Posts: 449
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Quote:
Originally Posted by Team Sergeant
Makes me wonder if the hammer spring is in backwards.....
Unless we see the rifle all we can do is speculate.....
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I had the same problem as the OP and this is what the problem was.
That is where I would look.
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Vincit qui se vincit
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fng13 is offline
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03-01-2011, 12:48
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#13
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Asset
Join Date: Feb 2011
Location: Oregon
Posts: 32
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Quote:
Originally Posted by Iraqgunz
Let me throw this out there. You built this yourself so its' an AR Frankengun. Here are few things.
1. Will it work with regular magazines?
2. What components did you use to build this?
3. Did you check things like firing pin protrusion, headspace, etc...
4. Are you absolutely sure that the hammer spring is installed properly?
Is it possible that this ammo was subjected to less than ideal conditions?
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1. yes
2. Model 1 sales kit
3. yes all are good
4. I'm certain, I've fixed that problem in many other peoples rifles, I know what to look for, this rifle has had many rounds through it before this problem.
Since I purchased the ammo its been inside my house at room temp and dry.
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Spitfire34 is offline
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03-01-2011, 21:53
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#14
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Guerrilla
Join Date: May 2010
Location: Wisconsin BCM territory
Posts: 152
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Well let me just say that Model 1 sales parts are marginal at best. Not trying to knock your build, just throwing that out there. If it is working with regular mags and not with the C-mag then my guess is that there is something wrong with that drum.
Nothing else makes sense aside from the obvious. I've never been a big fan of Beta mags because they never seem reliable enough.
Quote:
Originally Posted by Spitfire34
1. yes
2. Model 1 sales kit
3. yes all are good
4. I'm certain, I've fixed that problem in many other peoples rifles, I know what to look for, this rifle has had many rounds through it before this problem.
Since I purchased the ammo its been inside my house at room temp and dry.
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Iraqgunz is offline
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03-01-2011, 22:17
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#15
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Quiet Professional
Join Date: Dec 2010
Location: ISO
Posts: 297
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I doubt the drum or magazine has alot to do with light primer strikes.
I have been known to be wrong but I would look elsewhere.
1. Internals
2. Ammo
Id like to see a picture of the internals and a picture of the light strikes.
It could be poorly seated primers. But I would have guessed dirty Chamber, dirty BCG, obstruction slowing the hammer, miss installed hammer spring, light hammer spring and then poorly built ammo. In that order.
At this point without the weapon its all speculation.
Op Id be interested to hear what you find out as you test and resolve.
MK262M1 sends
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MK262MOD1 is offline
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