I have no idea what the tensions are on these springs although I have never had nor heard of any problems with them. I have to ask, why are you replacing all those springs? Have you fired the pistol and noted problems? Other than possibly the Recoil Spring and Magazine Spring from FTF issues, I have never heard of problems with the Mainspring or any of the others. It's a big job if you get into it. Curious to know your answer and would hope you share the serial number of your (new) Army HSc.