Pharmseller,
Yep, Big Game is also the first powder I try in the 7mm-08 with bullets in that weight-range--but (duh!) it took me a while to suspect it might work as well in the 7x57!
WLRs are also probably the hottest commonly available "standard" LR primer, which often produces more consistent results with spherical powders, which tend to be a little harder to ignite than extruded powders. Which is why I often use them in smaller cases (such as the 7-08 and 7x57) with sphericals.
