I'm a big 257 Roberts fan. Works best if you are a reloader as factory ammo is hard to find and limited in velocity.

IIRC, the Winchester 70 has a "short throat". I have a NIB Winchester Model 70 Featherweight from about the same time period as the one you are looking at buying. I just seem to recall about it having the short throat which limits your OAL when loading.

I normally shoot my Remington 700 Classic in 257 Roberts and have been very happy with it.