Chances are good you can self-diagnose your problem and improve your shooting by shooting a LOT of practice targets along with a fellow shooter who knows his stuff and can watch your gun mount and approach to the target. Try to shoot as much as possible with some really good AA/Master class shooters who can critique your misses. Be sure to let them know ahead of time you want their input. I've probably learned as much form them as from instructors.

Just remember this: Sportin' ain't huntin'.
JR

Be strong, be of good courage.
God bless America, long live the Republic.