What is the Spring rate of A p365 stock Recoil spring?

I use +p ammo exclusively, should I upgrade to a stronger recoil spring?

I would call Sig for recoil spring info.

Since you asked a similar question here:
https://sigforum.com/eve/forum...0601935/m/4630027415
I'm thinking you're talking yourself into trying a stronger spring, in which case I would not trust it until I had at least a few hundred+ rnds on that spring.

A 17 pound spring rate looks like stock from the factory. I have been trying some different springs from this kit.

https://ndzperformance.com/ndz...dz-sig-p365xl-gr-tp/

The 15# spring is what I have settled on. My match and practice loads are not +P but I have shot my +P Gold Dots with the 15# spring and recoil and the feel of the pistol were fine. You could add the heavier 20# spring but I doubt if it would make much of a difference. You would have to test that heavier spring to make sure the gun will run 100% with it.