To date there have been 13 people vote for 40 in G-Man's poll, "What caliber is your open gun?" I know there have been a few threads in the past, but I'd like this to be a place for us all to come together to compose a shapshot to answer the who, what, where, when, why, and how's. So, some questions, then I'll answer myself: When did you start shooting open? Was 40 your first caliber in open? Why did you choose 40? What make is your gun? Who built it? What barrel length, comp and optic a