I grew up in Western New York which was shotgun only for deer, and since then have lived and hunted in PA, Ohio and now Indiana, and for the past 40 years or so of deer hunting, outside of a few years with "borrowed" rifles in PA, have always used slugs... (and those years in PA, 90% of the time I was in cover that meant RARELY you would get a shot over 90-100yds, the slugs would have been as effective as the rifles.....)
And EVERY deer of the 30 or so I've killed except 2 I got with my flintlock rifle, I've gotten with a 12 guage slug, usually a Remington 1oz slugger.
Longest shot was for my only real "trophy," my "Hoosier Record Buck" 8 pt at 192 yds....(YEAH it was a perfect set up and I do NOT recommend shooting much over 100 with slugs, but I have been shooting my '97 riot gun with slugs since 1994 and know EXACTLY what it can do if I manage to do my part....)
I have also done a lot of experimenting over the years with "tactical" shotguns and loads, slugs, buck, bucknball, buck/birdnball, balls only as well.
Slugs do NOT work well with EVERY shotgun, even some DEDICATED to slug use...and work very well with others, even some never INTENDED to shoot slugs!
You have to try many different makes of shotguns, as well as many DIFFERENT shotguns of the same make that you like, along with many types of slugs through each one, until you find the "tube" that does it the best for you....then play with sights to make the groups shrink even more....
Yeah, along the way your shoulder will HATE you, there is NOTHING pleasant about shooting THAT many slugs FROM A BENCH
But that is the ONLY way to find your "Sweet Slug Gun....."
And when you DO find that "magic tube," NEVER sell it, trade it, or in any way let it get AWAY....