Here's what I'd do. I'd try a less expensive ammo to verify that the scope is sighted in about where you want it to be. If your scope is way off center, a few 3 shot groups with scope adjustments in between shooting each group should put you "near" to where your better stuff will hit.
However I see no way to avoid using the exact ammo that you plan to hunt with at the range to make 100% certain .... first of all that this ammo groups well out of your rifle and secondly, that your set up is indeed zeroed as best as possible using this ammo.
Hopefully the Winchester stuff you'd prefer to use will group great. If not, I'd swap to something else in a heart beat.