RE: What gun do you use and why?
I use my Remington 870 Turkey Special (1998 version if I remember correctly. It was back when the entire gun was camo and not just the stock.) with Federal 3in #6s in the Spring.
But for Fall, I use .45 Kentucky Rifle w/Patched RB 65g Pyrodex RS or Remington Genesis w/10mm 155g XTP and 60g 777 or a .50 Hawkins w/Patched RB and 60g Pryrodex RS.
I'm a ML guy. In fact Spring turkey is the only season I use something OTHER than a ML.