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Author Topic: Gold Dot 75gr 223 eject pattern causing jams.  (Read 418 times)
WLJ
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« on: October 26, 2018, 10:05:03 AM »

Picked up some Speer Gold Dot 75gr SP 223 and noticed at the range that the eject pattern was virtually straight forward and about every 5 rounds or so a casing would bounce off the defector right back into the action causing a jam. Never seen this with any other ammo.
Wondering if anyone else has seen this with the GD 75gr or with any other ammo?
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Rastoff
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« Reply #1 on: October 26, 2018, 01:02:10 PM »

I fired some 75gr stuff once. It didn't seem to change my accuracy so, I went back to the more common 55gr and 62gr ammo. I never had any ejection issues with the few hundred 75gr rounds I fired in my X95.
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WLJ
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« Reply #2 on: October 26, 2018, 02:32:32 PM »

I fired some 75gr stuff once. It didn't seem to change my accuracy so, I went back to the more common 55gr and 62gr ammo. I never had any ejection issues with the few hundred 75gr rounds I fired in my X95.
Was Gold Dot? The Gold Dot stuff seems to be loaded a but hotter than most. The eject pattern would seem to indicate that.
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Rastoff
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« Reply #3 on: October 26, 2018, 06:29:09 PM »

No, I'm sure it wasn't Speer Gold Dot.

However, I think your problem is more likely due to under power than over power. Normal .223Rem rounds usually have a muzzle velocity greater than 3,000fps. Speer Gold Dot has an advertised muzzle velocity of 2,775fps. I usually shoot Wolf Gold because I'm cheap. It has a muzzle velocity of about 3,200fps and works great in my X95 and AR.
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WLJ
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« Reply #4 on: October 27, 2018, 10:27:01 AM »

2,775 fps yes, but that's with 75gr bullets. Heaver bullets usually result in more recoil and you can feel the different during firing. I've fired Wolf Gold and there is noticeably less recoil with them compared to 75gr GDs. The straight forward eject pattern would seem to indicate the casings are impacting the brass deflector with more force than normal.
« Last Edit: October 27, 2018, 05:34:46 PM by WLJ » Logged
WLJ
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« Reply #5 on: October 27, 2018, 10:50:45 AM »

Basically I know why it's doing it I was just wondering if anyone else had seen it happen.
If you look at the Tavor's brass deflector it's impact area is at a straight 90 degree angle to the eject port. This basically means that if a casing is ejected with enough force it could be defected forward and in many cases back into the eject port.  Compare this to an AR's brass deflector which is at more of angle.
From my own observations shooting the Tavor Wolf Steel tends to land at the 3 to 5 o'clock position, normal run of the mill 223 brass 3 or so, NATO spec ammo 1 to 3, and 75gr GD 12-12:30.
« Last Edit: October 27, 2018, 05:34:29 PM by WLJ » Logged
Aussie E
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« Reply #6 on: October 27, 2018, 11:24:11 AM »

https://www.bullpuparmory.com/mobile/Product.aspx?ProductCode=PA-TAVX95-SHDEF

AE
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WLJ
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« Reply #7 on: October 27, 2018, 11:40:01 AM »

Had that exact deflector on the Tavor when it first did it with the 75gr GDs but after putting the factory deflector back on it still did it.
In 5 1/2 years of shooting this particular Tavor this problem has only occurred with 75gr GDs. I have not seen this issue occur with any other ammo.

That particular deflector has slight downward angle but is still straight (from memory) relative to the eject port in the horizontal. It seems to have the most effect on "weak" loads like Wolf Steel in helping them eject a bit more forward from my experience. YMMV  
« Last Edit: October 27, 2018, 05:34:10 PM by WLJ » Logged
WLJ
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« Reply #8 on: October 27, 2018, 05:42:13 PM »

Realized I spelled deflector defector every single time in my posts. Think I got them all. I mean, What The heck?
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Rastoff
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« Reply #9 on: October 28, 2018, 09:36:15 PM »

Did you try it without the deflector installed?

I've been working on a new deflector design. With my design on the gun, I did have a couple of malfunctions. Put the factory deflector back on and it works flawlessly; the brass just doesn't go where I want it to. Eventually I will come up with a good design.

In your case I think it really is the load. You are correct that the result of speed * mass does equal a bigger force. It may just be the load.
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WLJ
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« Reply #10 on: November 05, 2018, 09:53:08 AM »

Nope, didn't try without the deflector.
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Rastoff
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« Reply #11 on: November 08, 2018, 01:01:05 AM »

Give it a try. Couldn't hurt.
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