I lean more toward purpose than duplicate, which means I land on the diversity side of things. 300 win mag bolt action to reach out and touch someone, 308 semi auto to throw some lead down range, 45, 40 and 9mm pistol calibers, 12 guage of course, but I need a semiauto
. They all have their strengths, as do different platforms. When I do get that semiauto shotgun, I can't see getting rid of the 870, just way too much fun to rack pump action.