I just bought a new Benelli M4. I want to keep it fully loaded (4+1+1) for self defense. However, when I want to show my friends it or go to the range, I obviously have to unload it first. Is it bad for the same shotshell to keep being chambered? The last round that I chamber, I am slowly letting the bolt close on it. I ask this cause I've heard that it's bad to keep rechambering the same handgun round.