I want to get the best performance out of slugs, I understand a 22" rifled shotgun barrel can shoot 1oz. slugs acurately out to 200yds with only a 6" drop. And it's 1-2" high at 100yds. 12 ga or 20ga, both are really close. I'm looking for information and not saying any of the above is how it is with trajectoryof shotgun slugs.