Re: What calibers can I rebarrel from a .30-06 700 BDL
I just had a 700BDL built in 25-06. Not the best caliber for target shooting but hell on White Tail and speed goats! I had mine set up with a 25", Shilen, 1 in 9 twist, Select Match, SS barrel. It's making bug holes at 100 yards with Nosler 115gr Ballistic Tip, and 110gr AccuBond bullets. So far 4831sc seems to be the ticket on both bullets. I have run it out to 500 yards with the 115gr bullets and it's a hammer.
You won't get near the velocity out of a 25-06 that you can in the .257 Weatherby, but you will spend a lot less on brass (if you re-load) and a hell of a lot less on ammo (if you don't re-load). I also suspect that if you shoot a lot you will be spending less on replacement barrels if you go the 25-06 route.
You will be limited on match type bullets in the .257, as only Sierra, JLK, and Burger make match bullets for the .257 cal. Not a lot of choices.
If I had not built a 25-06 I would have done a .280 Rem.