I have had a couple of Choate Ultimate Varmint stocks, I have since sold them.
The underside of the forend and back of the Ultimate Varmint stock are ribbed making for a slightly bumpy ride on a bench rest.
They are quite heavy, that could be a plus or a minus depending on your intended use. Wouldn't want to stalk elk in the mountains with one, but for shooting off a rest the weight isn't a problem, its actually a plus.
They have an aluminum bedding block, are made of a heavy plastic material, and are very sturdy.
Now I have two of these and like them very much:
CHOATE Machine & Tool, Inc. - Tactical Bolt Action Stock
Same aluminum bedding block and heavy plastic material, but smooth under the forend and back of stock.
The tactical version has a heavy palm swell in the grip area, good for larger hands.
The barrel sits low in the forend and the forend is quite wide, it is very stable on a rest.
The short action Savage version can be had with the centerfeed detachable magazine. Very nice.
They are available from several vendors and very reasonably priced.
It does not look like they make a Winchester version though.