Okay, I will not get time to shoot the gun for awhile. So I CLP the hell out of it. Just manually running the bolt by hand. If the bolt is locked back and I hit the bolt release it will chamber, pull the charging handle back the whole way and let it fly, it will jam every time.... It seems that when the bullet hits the feed ramp it shoots the bullet upwards to much and thats when the bolt will jam about in the middle of the case... I did try a Brownells Metal mag did not make a difference