I have a strange problem. At least I think it's strange. I worked up a load for one of my rifles. It's amazingly accurate. It's easily .4" to .5" 5 shot groups at 100 yards. It's a moderate load with moderate velocity but the gun is chewing up the brass. Ejector marks can be seen on every piece of brass with some having raised burs. Primers look OK.
Since the load data isn't particularly hot I assumed the marks on the brass were from the gun being over gassed. I turned down the gas until the BCG would barely lock back. I swapped in tungsten buffer weights until the buffer weighed almost twice as much as a stock rifle buffer and the marks only got a little better. I rounded the edge of the ejector as well.
I have a load for 90gr TNTs with benchmark that shoots good and the brass looks great.
Does my load data seem hot enough to cause the results I'm having?
Load:
26.6gr AR Comp
Hornady brass (1x)
#41 primers
123gr ELDM
Mag length (not into the lands)
2500 fps
Gun:
20" Satern cut rifled barrel
Rifle gas
Rifle lower
Since the load data isn't particularly hot I assumed the marks on the brass were from the gun being over gassed. I turned down the gas until the BCG would barely lock back. I swapped in tungsten buffer weights until the buffer weighed almost twice as much as a stock rifle buffer and the marks only got a little better. I rounded the edge of the ejector as well.
I have a load for 90gr TNTs with benchmark that shoots good and the brass looks great.
Does my load data seem hot enough to cause the results I'm having?
Load:
26.6gr AR Comp
Hornady brass (1x)
#41 primers
123gr ELDM
Mag length (not into the lands)
2500 fps
Gun:
20" Satern cut rifled barrel
Rifle gas
Rifle lower
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