You should be able to effectively take down a turkey at 40 yards with an extra full choke. On a side note, if you don't end up filling your tag(s), you're more than welcome to hunt with me and my buddies May 5-7 about 45 minutes SW of Olathe(between Ottawa and Emporia). We're on more birds than we'd ever be able to shoot. Let us know how you do.

Mark