Follow up shots? In most cases a follow up shot should not be needed if you find the best load for your gun and make sure it patterns well out to 40 yards or more. Ionly shoot within therange of of my gun and make sureI have a clean shot.
I have never needed a second or worse a third shot. I know it can happen but you can reduce the chanced by knowing your setup and the range your shooting. I only keep 3 shells with me and they are all Nitro 3x5x7's

There are always more turkeys that will offer a better shot, I like clean kills.
Thats me not trying to rain on anyones parade.