You'll need to know what action was in it, or what it was designed for. It must be a very good fit, especially where the recoil lugs mate to the stock. Hopefully someone might just get lucky and recognize the inletting. The long relief on the right side under the bolt area is a good identifying feature; I'll bet someone here can ID it from that.
I would suggest changing the thread title to: "Help me ID a bolt action rifle stock"
One thing I'm sure of is that it's a centerfire, not a rimfire stock, so you're not gonna put a 22 in it.
Knowing the length of the floorplate cutout on the bottom of the stock will help ID the action length.
Sometimes there are identifying numbers or something inside the inletting area or under the recoil pad. If you remove the recoil pad, use the proper screwdrivers and techniques so you don't screw it up.