RE: Shot Size 4, 5, or 6?
I have had luck w/ both 4s and 5s.. 4s seem to hit a bit harder...
I have had great luck w/ Remington Magnum 3.5" # 5sin the past. Switched to the Winchester Supreme for 2 birds this year #4s and crushed them both...both pretty far shots too.
either will do.