It is hard to find places in southeast MI that let you shoot them. My gun club doesn't allow them but that is pretty common. Even the large ones like Washtenaw County who has a 600 yard range won't allow 50 BMGs. The only places I know of that let you are Huron Valley Guns, and Top Gun in Taylor. Top Gun is only 25 yards though so it's super pointless to rip one off in there unless you just want to piss everyone off
I have a place up north near my in-laws cabin on state land where I can shoot about a mile if I wanted to - one of those power line runways. It is surrounded by forest on both sides and the end of it runs into woods with a river behind it and a bunch of small hills to use as backstops. I've only ever shot to 500 out there, though, as the row doesn't allow any vehicles on it so you'd have to walk your target down as far as you want to shoot it - 500, 1000, a mile, etc. Plus beyond 500 I'd be nervous about hitting one of the poles for the powerlines even though it'd be hard. Don't want an errant bullet to hit one.