I have had good luck with the "Shooter's Stock Pack" made by Eagle Industries Home
Foam padding is nice for recoil reduction, straps are long enough that you can place a pad under the pack for more height and the little pouch is good for lens cloth, allen wrench for scope, etc. FYI, if you use this pack and do want to place something under the pack for additional height, cut an old school foam rubber coozie. The natural bend in the coozie fits great on the stock and the rubber material does not slip!
Also have used riser from Leatherman that work well Home