I don't think that the .17 will be powerful enough to drop a bigger turkey. If there is a smaller one out there, then you may be able to, but you will need to get a good solid shot on one. The 7 mm mag will probably be too much. Out of the three rifles you listed, I would go with the .22, however, I would choose to do it with a shotgun. That's half the fun...getting up close and personal