Five hundred bottles of single-batch "Montana 250 bourbon whiskey" from Whistling Andy Distillery in Bigfork are officially on the market this week, celebrating Americas independence.(WATCH: Distillery celebrates America's independence with Montana 250 whiskey) Distillery in Bigfork celebrates America's independence with Montana 250 whiskeyI said, 'Hey, Ive got these 5-year-old bourbon barrels that I think would be great to use as a 250 whiskey,…