4 inches at 100 yards is 8 inches at 200 yards. Limit her shooting to 50 yards and as she grows up, increase the range. I have taken over 50 deer on 3 continents with my Sako 243....as a practiced professional hunter/shooter.IMHO, you cannot expect much from a pre-teen boy or girl over 50 yards. You need to have her practice alot more until she is 100% confident in the shot. When she can shoot 1/2 inch groups at 50 yards, then let her shoot at the real thing at 50 yards. How old were you when you killed your first deer? You will ruin her desire to hunt unless you figure this out real fast. Good luck and regardsRick.