I zero'd @ 100 yds.
I have a very similar setup to yours, and shoot winchester slugs. The hornadys are very similar in performance, only hit about an inch off when from the winchesters when I tried them. I just zero'd the scope to 100 yds, and if something is getting close to 200yds, I just aim a bit high. I hit a CD @ about 200 yds with mine, just aimed about 6"-8" high. Never taken a shot at a deer over 100 yds, not much opportunity for that on my property. From the little testing I did, you really don't have to aim high until after 125 yds, then it's just kentucky windage. Take a couple long range shots, and see where your slugs go.
I have a very similar setup to yours, and shoot winchester slugs. The hornadys are very similar in performance, only hit about an inch off when from the winchesters when I tried them. I just zero'd the scope to 100 yds, and if something is getting close to 200yds, I just aim a bit high. I hit a CD @ about 200 yds with mine, just aimed about 6"-8" high. Never taken a shot at a deer over 100 yds, not much opportunity for that on my property. From the little testing I did, you really don't have to aim high until after 125 yds, then it's just kentucky windage. Take a couple long range shots, and see where your slugs go.