Just got back from the intial run on my new 6.8 build at the range. Pulled the trigger and it went boom like it is supposed to do. The bolt locked back like it was supposed to do. I put a mag in it and it cycled the first round out of the mag fine pulled the trigger and it fired and cycled the next round fine. I pulled the trigger again rifle fired but it malfunctioned. The bolt came back but didn't eject the empty case. Upon this it fed again so I need up with a double feed. Any suggestions would be much appreciated. I continued this same process over and over about ten times and it would double feed every time the third round from the mag. I would clear the malfunction and again the third round. I tried 4 different mags and it continued.