So after another trip to the range the JP SCS was still not allowing bolt lock back and I also felt more recoil. I talked to one of JP's armorers and they are sending me a lighter spring to try out. They said the SCS system was really designed for rifles with adjustable gas blocks that could have the gas and SCS systems tuned together. So I hope swapping the spring will solve the problem. So, if you're having the same problem I suggest getting a lighter spring from JP.