I can't speak for the whole US, but if you ever decide to come to Texas, we'd not only LET you shoot, we'd feed you a big, Texas size steak and encourage you to fire a whole bunch of different kinds of weapons!
Feeding me steak, showing me cabbage eating cows, and giving me a firearm.
Boys! I'm not sure HOW I could resist!
Seriously, I'm thinking of a US trip next year - and Texas is on the itinerary! You guys better load up those barrells! :-)