Re: 200gr Wildcats...700 action
A 284win would keep the same bolt fact.
Increasing to a magnum bolt face will get you to the 7mmWSM, 7mmSTW, and the 7RUM.
Myself, I view those the upper limit of what I would ask a 700 action to do.
Given a stronger action I'd be looking at the 7AX, 7Allen Mag, or the 284 JAZZ.