I have a new Weatherby Vanguard in 300 Wby. that I am going to mount a Burris Fullfield II on and need to know which mounts will be best.

DNZ Products Game Reaper 1-Piece Scope Base or Talley
or
Talley Lightweight 2-Piece Scope Mounts with Integral 1" Rings

Burris signature rings may also be an option but I like the one piece options.

Also with the Vanguard the Remington 700 mounts fit, right?

If it were mine, I'd go with the Talley's.

I have Talley lightweight one piece allow mounts on three guns (two omega muzzleloaders and a Browning A-bolt in .243) and love them. The quality of machining, fit and finish is first rate. They look sharp too. They use four torx screws per ring - really solid.