I realize this is off topic, but I wouldn't want to use a lightweight shotgun for turkeys, solely because of magnum shells and recoil. I tried using my Monty once for turkey loads and that was awful. It kicked like a mule. IMO you're better of going with a heavier shotgun for turkeys, one that helps reduce the recoil from using a magnum turkey load.
I use a Benelli Supernova in camo pattern for turkeys. It has a comfortech recoil system built into the stock and really helps reduce the recoil from shooting cannon-style loads at turkeys.