Parallax for Shotgun scope?

[JAM66]

I'm looking at two sifferent shotgun scopes for my HR 24" rifled barrel slug gun. Is it really going to make a difference if one has Parallax adjusted at 75yds and the other at 100yds? I was looking at the Vortex Crossfire 1.5-4 x32 , 100yd Parallax.

[spruce]

IMO it only makes a difference to someone in marketing.

Parallax only comes into play when your eye is not perfectly centered behind the scope.  Even if your eye was not perfectly centered behind the scope the small amount of aiming error would be inconsequential at any reasonable slug hunting range.

Think of it this way:  Most big game scopes are set at 100 yds, but people regularly shoot them at ranges of 300+ yards with no complaint.

Now if you were talking about ultra long range shooting at small targets parallax would be an issue and that's why scopes appropriate for that have adjustable parallax.