If you rebarrel and are looking to test your long range ability you should really consider the 7mm Rem Mag. Nothing against 264 WM, but it is inferior at long range to the 7mm RM with 180-195 grain projectiles utilizing 1-8.5 or 1-8 twist barrels.
On another note the 257 Wby is a hoot to shoot, light recoil for a laser beam and kills like something much larger than it’s diminutive .257 bullet would suggest. Just another thought if you rebarrel.
Enjoy your 264 WM, or whatever you decide.
