Ok I just bought this gun a week ago and I took it to a friends house today to shoot, unfortunately with a slight issue. It Shoots, feeds, and extracts perfect. The issue is after I shoot a round it does not recock.. I know this gun is supposed to be a better variation of the 7400. The Ammo I was shooting is Tula 150 gr. .308 and it doesn't look like theres been many rounds through it. also I did clean and oil it real good the day before we went... Any ideas??