I agree with minor to a point... Birdshot to a person 6 feet away with just a t shirt on will be very deadly,put him further away with a jacket on and story is different.
bridshot at close range to raw flesh would be very,very deadly. I have shot birdshot at say 6 feet into a 2 x 4 and it totally destroys the wood into splinters. At that range to a human i have no doubt that there would be no reason to chamber a second round,i don,t care how big or strong he is. So as silly as this seems i think it could also depend on the time of year. I don't see (around here) to many people wearing a heavy leather jacket in the summer whens it's 85 degrees outside. There was a story not long ago about a 13 or so old girl in Montana that meet 2 burglers in her house. She meet the first one about 2 steps outside her bedroom door.What they did not know is she was a vetrain compitition shooter. Short of the story is first one at about 10 feet one shot to the midsection,Dead on the spot,second one got it in the groin area and made it about 10 feet out the door before he died. Now the story did not specifically say what shot was in the gun,But i would have to assume it was run of the mill game or target load shot in there. Bird shot is a different story im sure,but do not think for a second that if you get hit unprotected with it at 6 or 8 feet that you are going to walk away from it and brush the sand off outside. You will be walking toward the bright white light asking for forgivness. The massive amout of tissue damage is going to shut you down very fast. It will be the faster blood donation you have ever made.
As for shooting it at 25 yards at someone,UMMM do you live in a Mansion?.
I have a 3000 sq foot house,My farthest shot i could take in this house is maybe 25 feet.Most senarios would be 10 feet or less. The concern of hitting others is still there,that is a given with any gun single projectile or multipal.