lurcher,
My first impression is that with a light contour barrel, you are heating the barrel and most likely are seeing vertical stringing as a result. A couple things to check however. If you will check the action screws directly in front and back of the trigger group for tightness and check in back of the action for evidence of slop between the receiver and stock. These are the things that epoxy bedding will eliminate.....any possible action movement. Also, using a dollar bill or business card, pass it between the barrel and forearm stock to make certain you have a forearm that is ONLY touching the barrel at the pressure point and no where else.
Finally, you didn't say if you have a scope or iron sights. It might help to eliminate the scope and try the iron sights to see if it is still stringing vertically. Good Luck!
Jim
