The key is knowing your firearms capabilities which as BT and Paul point the way by practicing on the range and a readiness afield to take that shot!!
just so you all know, i do sight it in, ALWAYS , i did it with #4 shot @20, 30 , 40 yds., then again with #5 shot.......i was just too worried about wounding the big ol bird....foolish me, next time i will remember what my gun is capable of
.....i didnt post that in my earlier reply and for some odd reason i felt guilty of not knowin what my gun is capable of, but i do
, so i had to get that off my chest, thanks for listening