I have one of the Ithica NID mag 10's and use it with handloads to hunt pass by geese and sand hill cranes. I use bismith and nice shot in about 1 7/8's - 2 oz. loads. Mine is over bored to .795 because of some stupidness before I acquired it. Briley had to bore match the bores and then reproduced the original choke profiles with screwins.
It is a big gun but if you can shoot/swing from your knees or standing and lift weights regularly it is very shootable. I have killed cranes cleanly to 80 yds. if I am having a good day. I had to experiment a bit with loads/wads and shot to get patterns to work well but they typically are full at 60 yds. No one makes guns like these any more.