sinex

Some background, Had an 18 year break from dogs, no hunting or shooting back ground, Just started training my 12 week old GSP on the whistle, he's pretty good, so a proud farther might say, 3 blows come back, 1 to sit or hup hup as have been told, 2 to go, any advise here appreciated, my real question is, I want to do is introduce him to the sound of guns, where might I take him in the Northants area?