Alright let's look at the trajectory chart Hornady provides for the 20 SST ..........





20 Gauge 250 gr. SST Slug
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Velocity (fps) / Energy (ft-lbs)

Muzzle
50 yd
100 yd
150 yd
200 yd

1800/1798
1628/1471
1470/1200
1331/983
1212/815





Trajectory (inches)

Muzzle
50 yd
100 yd
150 yd
200 yd

-1.5
2.5
3.3
0.0
-8.2

If you are sighted in dead on at 50 yards, ignore the -1.5" muzzle number - just forget it.

All that you need to know is that at 100 yards your point of impact (POI) should be .8" higher (call it1" to simplify it).

At 150 yards the POI should be 2.5" low.

And at 200 yards the POI should be 10.7" low.

IMO, according to this trajectory anything at 100 yards to 125 yardsis a point and aim deal and all the blame of a miss or bad shot placement is on you.

But the drop numbers over 150, when figured in with windreally stretch the odds of guaranteed lethal shots not to mention the energy falling off so quickly past 100 yards.