hey chip, turkeys are the most easily spooked animal i have ever hunted. i would also recommend a push pull box call that can strap onto your gun barrel so you wont spook them by moving. good luck
i would say you wouldnt want to shoot past 40-45 yards. why would you want a scope for turkey hunting ive never heard of that. i just shoot open sights. and the best choke i have ever used was a kicks for my sp10.
i turkey hunt alot and have patterned my gun every year and i found one of the best chokes to be kicks. i was in the woods and talked to birds but never saw any close enough to throw shot at