Gothca, I could and have used both. Has your Dad been using the 257 or the 270 for the many years?
At this time I like my 338/06 on a light rifle and my 7 Mashburn for the more open country.
Dober
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"the 25/06 is merely a .270 that took a week off from working out-what one does the other can do with the same effort".....Royce