Win,
Can' give you too much advice on accuracy. Do what you have to do to insure that the recoil lug is bearing firmly on the back of the stock. Also, try a shoot one, clean one when testing.
Three inch groups are not a disaster. Remember, that group measurement is the "worst case scenerio". It means that any shot will hit withing 1.5" inches of point of aim.
Myself, I would be more concerned with the "handiness" of the rifle. If you believe in the "scout concept", a rifle should come in at 7 lbs including scope. Why not put a Leupold 2.5 or 4X compact on the rifle to keep the weight down. In .243 your wife won't notice the recoil
As an aside, I have a Compact in 308. It has the XO express ghost ring and post front sight. It weights in at 7 lbs even and is a joy to shoot and carry. However, I have shot for a long time so I am almost impervious to recoil. Remember however that a rifle is: "carried much but shot little" in the field.
My $.02
SM