Depends on how far out you plan on shooting. I usually either sight in to be dead on at 100 yards, or if I might have the chance for a long range shot, 2" high at 100. Sighting in 3" high at 100 yards is fine, you just need to remember you are hitting high and not aim high. I was a shotgun slug hunter for years, and with slugs my instincts tell me to aim high for a 100 yard shot. But that's just me...