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ks_wayward_son · April 15, 2019, 05:44 PM

Recently have had a chance to take my newly built AR to the range and it has been enjoyable. Except, I have had a few light primer strikes.

I've run XM 193 and 855 through my rig without any problems really, except my barrel is a 1:7 and I figured it could group better than the 55 and 62 grains. Therefore, I ran some Frontier Match 75 grain HPBT through it. Man, did it like those. Except, out of approximately 40 rounds, I had 2 light strikes with no ignition.

I am using a Rise Armament RA 140 trigger, which is sweet. I had only put about 200 or maybe no more than 300 of the XMs through the pipe before trying the Frontiers, so I don't really think I can blame the malfunctions on carbon buildup. My build is a mid-length and I am currently running a standard/carbine buffer.

Would I benefit from perhaps an H1 or H2 buffer for the Frontiers? I didn't seem to have much trouble with the xm's like I said, but I'd really like reliable function with those 75s.

April 15, 2019, 05:44 PM	#1
ks_wayward_son Senior Member Join Date: July 19, 2007 Posts: 332	AR light primer strikes Recently have had a chance to take my newly built AR to the range and it has been enjoyable. Except, I have had a few light primer strikes. I've run XM 193 and 855 through my rig without any problems really, except my barrel is a 1:7 and I figured it could group better than the 55 and 62 grains. Therefore, I ran some Frontier Match 75 grain HPBT through it. Man, did it like those. Except, out of approximately 40 rounds, I had 2 light strikes with no ignition. I am using a Rise Armament RA 140 trigger, which is sweet. I had only put about 200 or maybe no more than 300 of the XMs through the pipe before trying the Frontiers, so I don't really think I can blame the malfunctions on carbon buildup. My build is a mid-length and I am currently running a standard/carbine buffer. Would I benefit from perhaps an H1 or H2 buffer for the Frontiers? I didn't seem to have much trouble with the xm's like I said, but I'd really like reliable function with those 75s.