Re: 200yd shooting in 100yd hole?
How high above the bore line is your scope mounted? The higher, the flatter at 200 yards for POI.
Have you done a box test with your scope, or a 100 yard check for POI change/tall target test of turret adjustmentor BDC crosshair at 100 yards and confirm?
Scope parallax adjusted properly?
Did you use the exact same rest at 100 and 200 yards?
Is your visual focus when shooting on the "crosshair only" for both ranges?
What was the bore's condition at the start of the test, clean, fouled, how many shots?
Is your barrel free floated? Cooled between shots.
When I have experienced this effect over the years, it has usually been one or more of the above. IMO
"Let us speak courteously, deal fairly, and keep ourselves armed and ready"-T. Roosevelt