I'm sighting in my new H & R Ultra Slug Hunter 20 guage with Federal 3" Barnes expander sabot slugs. I wanted to know your recommendation on where I should have it shooting at 100 yards. I was looking at the ballistics and it has it dead on at 150yds, which puts it at 3.2" high at 100yds if I'm understanding the chart. This is my first attempt with a slug gun and I'm just not sure what most folks are doing. Any advise is appreciated.

Here's the ballistics chart:

25 = 1.5
50 = 2.8
75 = 3.4
100 = 3.2
125 = 2.1
150 =
200 = -7.6