About 4 years ago, I bought and installed a barrel on an Eagle Arms AR10. The seller claimed it was a barely used Mike Rock 5R, and so far, I have no reason not to believe him. At the time, I didn't have head space gauges, but installed it anyway. I realize that I exposed myself to potential injury or worse, but have only put 200rds down the barrel so far. The rifle puts the 168Amax on steel at 900yds pretty consistently, but the brass coming out of the gun is measuring 1.641" on my Hornady headspace gauge kit. This is longer than the brass that ejects from my Armalite 7.62NATO chrome lined carbine barrel, which measures 1.638".
A 7.62X51mm NATO NO-GO gauge measures 1.6405", so it seems to me that this rifle has excessive head space, and is dangerous to shoot. I'm looking for a way to correct this, but don't know where to start. Should I be looking at the barrel extension? Or is the barrel toast, and I need to replace it?
A 7.62X51mm NATO NO-GO gauge measures 1.6405", so it seems to me that this rifle has excessive head space, and is dangerous to shoot. I'm looking for a way to correct this, but don't know where to start. Should I be looking at the barrel extension? Or is the barrel toast, and I need to replace it?