Any long range big bore shootersi n MN

Maybe I should follow up with why...I picked up a modified regulated Benjamin bulldog to get a coyote that was harassing my dog. I sighted the gun indoors at 30 yards, and got one of the coyotes, and the others haven't been back much at all since. But then I picked up a bunch of ammo. And I think I need to get a compressor...but if I don't have anywhere to shoot, I'm skipping the compressor for now. But I think it would be fun to see what kind of accuracy I can get out of this modified bulldog at longer ranges with different ammo. Just need a spot (western Twin Cities area, say anywhere from Buffalo to Excelsior to Watertown to Glencoe areas).