It will not hurt giving it a "set" by doing what you are doing now.I do so overnite normally,and I use the "old style" spring also.(I have a stock of them
)
I believe tracker was saying that it is possible to accidently switch out a mag/recoil spring (new style) with each other..
I will say that some peaople have had a slight problem with feeding after a recoil spring change,untill it "breaks in" again.Normally just a couple of mags though.
If you continue to have problems,I would order the new style springs to try,people have had great things to say about them and the mag springs too..
Brenden