Hummm, I've killed many a turkey with an old Winchester model 12 with a Modified choke out to 30 yards. I killed a jake once at 35 steps with a 20 gauge choked modified. I think that its more about putting them where you aim rather than how tight the choke is. On some of these "turkey chokes" they shoot so tight that its about like shooting a slug out to 30 yards. And some times they move the point of impact significantly. I've seen turkeys missed at close range because the pattern was too tight. Pattern your gun and figure out what the effective range of the weapon is. Then don't take a shot unless the turkey gets within the range.