[spacemanspiff]

MrBorlands advice is great. Just wanted to voice one thing, concerning the shooting from the bench with the rifle sandbagged or held in a rest... Use those tools to see what your gun can do, but don't get so used to using them; and avoid comparing your groups to those who arent using sandbags/rests.
Theres a lot of shooters out there who let the sandbags/rest do most of the work for them, and all they can do is pull that 2oz trigger and work the action.
Its nice to know your guns limits, but you also must learn YOUR limits. So use a sandbag on the front end of your gun, find out how well you shoot with the butt up against your shoulder, and see the crosshairs rise and fall with your heartbeat and your breathing. Find out how well you shoot without the sandbag and using only your offhand to hold the rifle up. Find out how well you shoot from standing, kneeling, prone, etc.