I agree with GB. I will even go one step further. A .22 and a case of ammo is worth it's weight in gold if you want to better your shooting. Use standard target shooting positions, prone, sitting, and kneeling. Once you get shooting well from a supported position, spend at least half your time firing offhand, as that is the hardest but most usefull shot in the field. You won't find the .338 kicking too hard when fired from a sitting or standing position. Too many guys spend too much time benchrest shooting with hunting rifles. A great way to learn to flinch, and I have never seen a shooting table in the woods.