Gene,
We do both, here.
The dividing line is Highway 95 in MN. North of it, you can use centerfire rifles, south of it, you use slugs only. I have no clue who came up with this scheme or the reason why, other than to guess Minnesota gets flatter the farther south you go out of the metro area.
Given the choice between a swamp buck out of the northern half of the state, and one of the monsters that turn up in the southern, more agricultural end of the state, I’d take the southern deer.

I do eat more than my fair share of venison every year, based on the generosity of friends. Of late, a friend native to Kentucky, hunting just over the border in Indiana, has been keeping me in very tasty deer each fall.
You know it is good if my wife will eat it.

Best,
Ted