My 25-06 has a 1-9 and it is ideal for 115-120 grain bullets. I am collecting parts for another 257 Weatherby and this one will have a 1-7" twist barrel for 100-130 grain bullets. There is no down side to the faster twist unless you want to shoot really thin jacketed varmint bullets but at 250 velocities even this might not be a problem. In the Savage I have always used 87-100 grain bullets so twist was never an issue. I would go 8 or 9 twist unless you wanted to try the heavies making it into a 25 Creedmoor. Black Jack recommends a 1-7 to 7.25 for this size case and their 131 bullet. Going with a faster twist takes nothing away from the classic nature of this cartridge.
