For the what it is worth department in my humble opinion-
I am not a big fan of under-gunning which the .410 clearly is for turkeys. Yea, yeah.......I know it will kill a turkey when everything goes just right; But why risk hitting birds that may run off looking fine, but took piece a shot and then die later?
If you insist on using a .410 please consider having a dog on hand for retrieving cripples.
If you agree with me call it fact; if you disagree - call it my opinion.
After all - we are talking turkey.