That's an amazing group with those Winchesters,,they where the best factory I could find for the 708 too.
They'er the Nosler Balistic Silver Tip bullet of course,,and you have the overall length from a factory round,,and it will have a crimp right?
I took a few apart and found the powder was a duplex load of some ball and flake powder mixed, and I'd guess the case was only 80-85% full,,so all ya really gotta try is a few powders that'll give the matched velocity.
After shooting 2 boxes of the factory stuff I found I don't like the Silver Tip bullet,,the black coating was a PITA to clean from the bore, I've found good results with other copper jacket bullets,,I don't need that black goo in my bore.
