I just follow Hornady Essential Duty 135 gr +P in 9mm. It feeds and shoots through my SIG P365 and out performs SIG's proprietary ammo for that pistol accuracy intelligent. My modern get for any Lee 9mm carbide "undersize" resizing die that reduces the case diameter by .003" in excess https://9mm-bullets19752.thenerdsblog.com/43583434/5-simple-statements-about-9mm-reloading-explained