I have a fixture I made that hangs off the back of a mill table. I support the stock vertically and use a 5 flute carbide end mill. Climb cut around the stock and there won't be a single chip/tear in the wood. It's worked on every stock combination I've ever used. I bought one of those little laser leveler thingys from Sears and it's mounted to a camera tripod. I keep it zero'd out and have a spot on the floor marked for quick reference. Turn the laser on, tap on the stock with the fixture finger tight until the light bisects the guard screws and "looks right" (very important) lock it down, and then give'r hell. I can cut for LOP, install adjustable buttplate assy's, mercury slush tubes, what ever in one operation.
Quick and simple. Best part is no saw blades buzzing. I have a little phobia as I about lost a finger to one when I was 17.