I've never understood the facination with shooting 100 gr. bullets in the 257 Wby .My Mark V Fibermark shoots the 120 gr. NP into MOA or better groups , and [more importantly IMHO] after bedding in the factory stock , the first shot from a cold, fouled barrel is in the group .
This is with a load of IMR 7828 right out of the Nosler book .68 gr. gets me right at 3400 fps .
For years, the 120 gr. NP was my 'go-to' bullet in the .257 Wby. It took a large number of critters, very handily.
I settled on the 100 gr. TSX primarily because of its greatly improved accuracy over the NP, in my rifle. As for performance on game, I can't see any difference- the last head of game to fall to the TSX was a cow elk, at 300 yards. The flattened trajectory of the TSX, at 3700 fps, is a bonus. Sighted in at 2" high at 100 yds, it is zeroed at 300, and less than 7" low at 400.
That's FLAT!!!!!
