If I found a .257 Wby that had an accurate 24" barrel, I would probably just shoot it. If I was building one from scratch, however; I would either builda .257 Wby in a 26" tube or a .25-06 Ackley Improved in a 24" or 25" barrel length. My current .25-06 Ackley Improved delivers 3242 witha 117 gr. bullet and 3523 with a 100 gr. pill - out of a 24" barrel. This is a Douglas 1:10 barrel.