In my revolver I shoot a cylinder of SD rounds every range trip to remind me what the recoil is like compared to my practice rounds. So every 4 range trips I have to buy a new box which isn't that bad.
With my 40 there's no way I could afford to practice with SD rounds. I know they work in my gun and that's good enough.
I carry FMJ in my 380.
Someday I'll be good enough to know if a gun is accurate or not.