Welcome.....my guess is a Stephens cur. Black with chrome and a grey muzzle, and a pile of squirrels too. You find them red ones up North ? Just seen he's a Buckeye, explains red squirrel.
Hummer and 20K Kate cross . Decent dog. I dont believe he reached his potential yet but he has had days this year he looked outstanding. I think he is 2.5 years old. Yours looks a bit older?