I’ve installed a 3006 barrel and booster, headspaced, Removed the left front 308 cartridge guide. When I insert linked rounds, live and dummy rounds, it will strip the first round and chamber it and the next cycle, it will eject the round but the gun will not pull the next round from the belt. I’m missing something, either need to remove the rear guide or swap parts in top cover. My research has not led me to anything definite. Thanks for any insight.