yes the size or mass of the gentlemen , and his experience and familiarity with the mag 10 Ithaca,
operating that shotgun does matter, Im 6'3" 250lbs
and I can fire all three shots off with my mag 10, and HIT what I'm aiming at,( lets say a 5 gallon bucket at 50 yards, )
before the first empty 10 ga case hits the ground , but then I have over 34 years of practice,
Ive done that in practice lots of times using buckshot loads, in practice,.. just for giggles,
in the field its not a skill set you need,
a single 18 double 00 buck load, fired at my 35-40 yard self imposed max range,
does lethal things too hogs, as does a 3.5" 10 ga shell, of 2.25oz load of #2 on turkey at that range.
BTW I owned a single shot H&R break action 10 ga, it kicked FAR worse,

especially after I removed the steel weight in the stock,
I sold it to a buddy that really liked it, and for a few bucks more than it cost me,
but I threw in 100 loaded assorted. shells I had, it was money used to buy a 10 ga MEC reloader
and 500 empty cases to use in my ITHACA