That is really hard to say.. First off do you want it dead on at 200 yards? Also some scopes can actually be damaged if you adjust them too far. I never had a Bushnell do that but I did a Redfield once (they replaced it and I sold it).

I would instead try to reach 150 yards lets say, and then learn the drop from there. Or go 12 clicks up for three inches. At 100 yards that should be putting you out to somewhere around 140 yards I believe it is. Sabotloader is so much better the me at this stuff. Then you hold the low end of the + on the bull at 200 yards. (something like that.. you people shooting that far with a muzzleloader boggles my old head).