Leo I have had a personal experience with a Tom at close range. I just about assassinated this bird like Lincoln at the theater:D.
He came in all quiet behind us, while my son Joe and I were working birds in front of us. He turned his back with fan spread to get past a downed branch on the trail and that gave me a chance to swing my gun around. The barrel was practically touching its head when I fired. MAYBE 6" from it...
The gun had to send out a pattern no bigger than the size of the barrel. I was luck to have dropped him where he stood. After that, I have really gotten to know how this gun shoots and have done 1 yard, 5 yard and 10 yard patterns.
Just this past Saturday, at a gun show here in NY, I was able to purchase a shorter bbl for this Mossberg 835. I was using a 28"bbl then, with a HS Strut Undertaker tube and now I have a 24 incher. The long one caught every branch as I walked in the turkey woods.
Excellent advice Leo to know your gun at close range.