I'm a hoarder when it comes to ammo and especially what ammo my gun likes. Years ago I purchased a winchester model 70 7mmSTW and this is my go to gun. Even when I shoot with some friends for bragging rights this gun is on the firing line. I bought 25 boxes of the Winchester 160 grain fail safe ammo. I also read where Winchester used a lot of powder that they sell to us reloaders in their factory ammo. Anybody have a clue what Winchester powder they used in this ammo. It is with nikel plated brass.