I did some tests with my 11.5":
50y zero: -2" (25y), 0" (50y), +4" (100y)
100y zero: -2" (25y), -2" (50y), 0" (100y)
for 200y shots, I believe the 50y zero will give close to 0".
Basically 50 zero gives you the flatest trajectory to 200y, but the 100y zero gives a flatter for 0-100y shots