I am going to be the one who says it. A novice hunter would be better served if they used a more suitable caliber for hunting turkeys and so would be the turkeys, It is one thing when you are experienced to use a sub caliber shot to hunt, it is something else entirely to do it when you are not experienced. The saying "use enough gun", coined I believe by Robert Ruark, is appropriate in this situation. A decent shotgun can be purchased for not a whole lot of money and it would be suitable for many species of game. This is not a post being critical of the OP, she was asking for advice because she didn't know, however I do not believe as experienced hunters we should be encouraging new hunters to use a firearm that for a well seasoned experience hunter may be sufficient but for a novice is not. For the record I started hunting with a .410 which in my opinion is the worst possible choice for a beginner.