it seems like I remember reading somewhere that the difference was the pressure curve is the issue because to get the Superformance high velocity that Hornady had to change the pressure curve so that in essence there was more pressure sooner than Non Superformance ammo.
seems like I remember them recommending to use a rifle gas system from a 20 inch barrel to keep the action from opening too soon.
Shoot it anyway. The worst thing that can happen is a rim will get ripped off.
You have a cleaning rod to punch the case out.
Any of that ammo you have is fine and dandy.
