Try your particular choice out first in a few loads. My 30 year old (pre rifled shotgun barrels and sabots) Remington Buckmaster, 12 Ga 2 3/4 in. which has a 20 in. barrel in IC will make 1 hole at 75 yards with standard rem sugs - But not with the magnum, maximum or any other brand or hot load or Brennecke slugs, all ow which go all over the place.
Another peculiarity of this gun is that it has a scope, an old low power variable Tasco shotgun scope on a side mount through the pins. Tear it down, clean it, put it together and the scope still holds zero!
Anyway, with very few shots available at over 75 yards I'd be nuts to change anything. It took a doe and a big hog last year.