Unless you have full length guide rod you will have some "friction" between the recoil spring and slide.....the lighter weight steel springs just function better with the short guide rod.
Yup. I'm realizing that now.
I don't have a drill press. I could come pretty close to center with a hand drill...but man I don't want to do that to my stainless.
I'd do that to a surplus 75 in a heartbeat.
I'll just have to live with it
Right now the matte stainless is sitting with the slide locked back hoping the spring will settle down a bit.
I'm also thinking of taking a shorter harder spring and cutting some coils off. Maybe a browning high power spring which I read is of a slightly smaller diameter but still fits.