I've got 2 of the Rampros, a 20VT on their smallest action, and a 6.5-284 on their STP action. Not sure if that is the largest action they make, it fits a Rem SA footprint. Brad Stairs is the one I use for my Rampro needs. He's currently making me a set of bases for my STP using the Kelby dovetail. Here's his email addy,
perfguns@gmail.com.