Brass Damage on ejection

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Brass Damage on ejection

Postby jgilesg » Mon Sep 25, 2017 12:54 pm

Hey guys
I was out yesterday and had a few rounds that the shoulder was damaged on the brass on ejection, one that got hung up in the chamber. I have had a few pieces of brass hang up in the chamber but no damage to the brass.
I did change the stock on the gun, I was using a carbine length stock with a carbine buffer spring and a standard buffer. I changed it to a rifle length stock (California needs to be fixed soon), I used a standard rifle length buffer spring and a standard rifle buffer.
The loads that I was shooting were well below the danger zone, I was shooting 225 FTX with 38-39 grains of little gun some with a taper only and some with LCD only. I cant recall if it was one or both of the crimps that caused the problem. The brass had been reloaded 4 times. On ejection it was kicking rounds out pretty robustly at about 2:00, I was using a brass catcher so I couldn't tell you how far but it would hit the back of the net of the catcher.
I assume the buffer or spring is to light but not sure? I have been thinking about an adjustable gas block but thought I would check with you all.

Thanks for your help
JG
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Re: Brass Damage on ejection

Postby plant_one » Mon Sep 25, 2017 10:44 pm

without knowing what you did with the crimps more specifically - like how much of a taper, etc - we likely wont be able to determine the cause.


most likely its a symptom of being over gassed, but with all the other unknown variables its going to be difficult to diagnose with 100% certainty.
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Re: Brass Damage on ejection

Postby Jim in Houston » Sat Sep 30, 2017 10:58 am

Casings should be ejected at about 4 o'clock, or at least 3 o'clock back. If the cases are being ejected too slowly, could they be hitting the forward end of the ejection slot and being forced out by the round being chambered? Just a thought.
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