falure to reload

xandi · June 28, 2015, 11:38 AM

My ar15 will fire, and eject a .223 rem tulammo cartridges, but will not strip the next round off the magazine.
Same mag/gun works fine with other ammo.
Any ideas on why it does this and how to fix it?
Thx

precision_shooter · June 28, 2015, 12:38 PM

If it does it with that one ammo, the ammo is too weak to fully cycle the bolt...the bolt is not coming far enough to the rear to grab the rim of the next cartridge. A lighter buffer should fix the problem, but may be too light for the other types of ammo that you don't have problems with now.

I wouldn't want to change the buffer between types of ammo. If it were me, I just wouldn't shoot the Tula ammo. Find another cheap steel cased ammo that will cycle reliably without changing the buffer.

marine6680 · June 28, 2015, 01:28 PM

Short stroking...

What brand of AR is it... Some of them actually have properly gassed systems for 5.56 spec ammo, and don't like weak ammo.

As was mentioned, a lighter buffer will allow using the tula, but may be too light for standard 5.56... It will work but recoil more, and wear the parts faster.

xandi · June 28, 2015, 01:34 PM

The upper is a delton with a 16" barrel

marine6680 · June 28, 2015, 01:50 PM

Mid gas or carbine gas? If you have the "grenade launcher" cut on the barrel it's a carbine gas. Mid gas is longer, so the handguards are longer.

What buffer are you using? The face of the buffer will be blank or marked H, H2, or H3.

To test for proper bolt carrier movement.

Load a mag with 2 rounds.

Fire the first, the second should load properly.

Fire the second, the bolt should lock open, and stay open when you remove the mag.

If it fails any step, the rifle is most likely short stroking.

I do this for a full box of ammo, to be sure.

Metal god · June 28, 2015, 04:05 PM

Tag , I have two Delton's One is a complete 316 the other I built off of a rifle kit . The barrel , BCG and upper receiver are about the only things left from the kit . one is a mid the other a carbine . They both have functioned well with any ammo . I should add that I have shot very little steel cased ammo through them . Maybe 200rds of multiple types . I don't remember ever having an issue .

xandi · June 28, 2015, 04:13 PM

Mid length and h buffer

marine6680 · June 28, 2015, 09:44 PM

Well, you have the option of trying a standard carbine buffer.

That combo should work fine with weak ammo on most rifles... I wonder in the gas block is misaligned.

Mobuck · June 29, 2015, 06:12 AM

If you're using a midlength and H buffer, where is the rifle throwing the brass from the ammo that feeds correctly? I've never found the need to use a heavier than standard buffer with any midlength based on brass ejection patterns.

zukiphile · June 29, 2015, 07:23 AM

Sounds as if you have within your grasp the makings for a very soft shooting carbine.

I have a carbine lower on a rifle upper that will reliably cycle wolf steel with a 5 ounce buffer. The recoil impulse is a long gentle shove with no sharp jolt at the end.

You should be able to do the same thing with a lighter buffer. However, if you do this, or if you happen to remove one of the steel weights from a standard buffer and replace it with something even lighter, I would not use any other ammunition unless I first replaced the buffer with at least a standard 3 ounce buffer.

Boncrayon · June 29, 2015, 05:28 PM

It's an issue with the pressure in your TulAmmo round. I shot .556 blanks with a golf ball tube devise that sent the golf ball over 400 yards. But the blanks did not have enough pressure kick back to open the breech for a second round. The pressure should be sufficient for to push the shell out and reload the next shell.

xandi · July 5, 2015, 08:04 PM

Thx for the help everyone

bamaranger · July 6, 2015, 01:51 AM

Just for grins, and maybe saving yourself a bunch of aggrevation, you might try some different magazines, or doing a good cleanup of your existing ones.

Could be the steel Tula is not doing well in the mag box.

Taco-XL · July 11, 2015, 04:39 AM

This is why i prefer to have a gun that is a tad overgassed. It will ensure function with weaker ammo. Fine tuning to run "silky smooth" at the expense of
functionality is not a worthy trade off. Id try the standard buffer as some have mentioned.

DanTSX · July 11, 2015, 07:50 AM

Upgrade your extractor spring.

June 28, 2015, 11:38 AM	#1
xandi Senior Member Join Date: April 10, 2015 Location: ga Posts: 321	falure to reload My ar15 will fire, and eject a .223 rem tulammo cartridges, but will not strip the next round off the magazine. Same mag/gun works fine with other ammo. Any ideas on why it does this and how to fix it? Thx

June 28, 2015, 12:38 PM	#2
precision_shooter Senior Member Join Date: September 8, 2007 Location: DFW, Texas Posts: 2,475	If it does it with that one ammo, the ammo is too weak to fully cycle the bolt...the bolt is not coming far enough to the rear to grab the rim of the next cartridge. A lighter buffer should fix the problem, but may be too light for the other types of ammo that you don't have problems with now. I wouldn't want to change the buffer between types of ammo. If it were me, I just wouldn't shoot the Tula ammo. Find another cheap steel cased ammo that will cycle reliably without changing the buffer. __________________ "Laws that forbid the carrying of arms...disarm only those who are neither inclined nor determined to commit crimes...Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man." - Thomas Jefferson, 1776

June 28, 2015, 01:50 PM	#5
marine6680 Senior Member Join Date: July 24, 2012 Location: Parker, CO Posts: 4,594	Mid gas or carbine gas? If you have the "grenade launcher" cut on the barrel it's a carbine gas. Mid gas is longer, so the handguards are longer. What buffer are you using? The face of the buffer will be blank or marked H, H2, or H3. To test for proper bolt carrier movement. Load a mag with 2 rounds. Fire the first, the second should load properly. Fire the second, the bolt should lock open, and stay open when you remove the mag. If it fails any step, the rifle is most likely short stroking. I do this for a full box of ammo, to be sure. Last edited by marine6680; June 28, 2015 at 02:24 PM.

June 28, 2015, 04:05 PM	#6
Metal god Senior Member Join Date: April 10, 2012 Location: San Diego CA Posts: 6,875	Tag , I have two Delton's One is a complete 316 the other I built off of a rifle kit . The barrel , BCG and upper receiver are about the only things left from the kit . one is a mid the other a carbine . They both have functioned well with any ammo . I should add that I have shot very little steel cased ammo through them . Maybe 200rds of multiple types . I don't remember ever having an issue . __________________ If Jesus had a gun , he'd probably still be alive ! I almost always write my posts regardless of content in a jovial manor and intent . If that's not how you took it , please try again .

June 29, 2015, 07:23 AM	#10
zukiphile Senior Member Join Date: December 13, 2005 Posts: 4,450	Sounds as if you have within your grasp the makings for a very soft shooting carbine. I have a carbine lower on a rifle upper that will reliably cycle wolf steel with a 5 ounce buffer. The recoil impulse is a long gentle shove with no sharp jolt at the end. You should be able to do the same thing with a lighter buffer. However, if you do this, or if you happen to remove one of the steel weights from a standard buffer and replace it with something even lighter, I would not use any other ammunition unless I first replaced the buffer with at least a standard 3 ounce buffer. __________________ http://www.npboards.com/index.php

June 28, 2015, 01:28 PM	#3
marine6680 Senior Member Join Date: July 24, 2012 Location: Parker, CO Posts: 4,594	Short stroking... What brand of AR is it... Some of them actually have properly gassed systems for 5.56 spec ammo, and don't like weak ammo. As was mentioned, a lighter buffer will allow using the tula, but may be too light for standard 5.56... It will work but recoil more, and wear the parts faster.

June 28, 2015, 01:34 PM	#4
xandi Senior Member Join Date: April 10, 2015 Location: ga Posts: 321	The upper is a delton with a 16" barrel

June 28, 2015, 04:13 PM	#7
xandi Senior Member Join Date: April 10, 2015 Location: ga Posts: 321	Mid length and h buffer

June 28, 2015, 09:44 PM	#8
marine6680 Senior Member Join Date: July 24, 2012 Location: Parker, CO Posts: 4,594	Well, you have the option of trying a standard carbine buffer. That combo should work fine with weak ammo on most rifles... I wonder in the gas block is misaligned.

June 29, 2015, 06:12 AM	#9
Mobuck Junior member Join Date: February 2, 2010 Posts: 6,846	If you're using a midlength and H buffer, where is the rifle throwing the brass from the ammo that feeds correctly? I've never found the need to use a heavier than standard buffer with any midlength based on brass ejection patterns.

June 29, 2015, 05:28 PM	#11
Boncrayon Senior Member Join Date: March 24, 2008 Posts: 920	failure to reload It's an issue with the pressure in your TulAmmo round. I shot .556 blanks with a golf ball tube devise that sent the golf ball over 400 yards. But the blanks did not have enough pressure kick back to open the breech for a second round. The pressure should be sufficient for to push the shell out and reload the next shell.

July 5, 2015, 08:04 PM	#12
xandi Senior Member Join Date: April 10, 2015 Location: ga Posts: 321	thx Thx for the help everyone

July 6, 2015, 01:51 AM	#13
bamaranger Senior Member Join Date: October 9, 2009 Location: North Alabama Posts: 8,300	ya'know Just for grins, and maybe saving yourself a bunch of aggrevation, you might try some different magazines, or doing a good cleanup of your existing ones. Could be the steel Tula is not doing well in the mag box.

July 11, 2015, 04:39 AM	#14
Taco-XL Senior Member Join Date: January 6, 2015 Location: West Virginia Posts: 168	This is why i prefer to have a gun that is a tad overgassed. It will ensure function with weaker ammo. Fine tuning to run "silky smooth" at the expense of functionality is not a worthy trade off. Id try the standard buffer as some have mentioned.

July 11, 2015, 07:50 AM	#15
DanTSX Senior Member Join Date: October 11, 2008 Posts: 318	Upgrade your extractor spring.