My reasoning for sighting in at 50 yrds with these lead slingers is 1st and foremost Gravity. Supersonic and Subsonic after approx 50yrds down range as Lightfield states it best - and then - Wind Drift.

I sight all my sluggers in 2" high at 50yrd (clean clean cool cool barrel). Then - go out to 100yrds on a calm dry day and maybe tweek scope elevation a bit - Thats it!

Now the biggy is compensating for shots at 25+ - yrds!

Only reason I sight in for 100yrds is 3-4 deer stands give me a prime opportunity out to 125+ yrds.

When you live in a Shotgun only state you get a little anal about this nit picky crap.

Alot of guys can't make a decent 75yrd shot with a 12 gauge slugger because they don't follow simple rules when setting up and shooting these Freekin Canons with a scope.