What is considered a good pattern? Certain percentage of shot on target?
This video is pretty good for first time turkey hunters getting their gun set up and understanding it's effective range -
I got the 20 gauge all set for turkey the first year Hevi-Shot released their Magnum Blend. This load carries 5, 6 and 7. I combine it with a Primos Jelly Head choke. And while I have only killed turkey with my bow since then, I have loaned it on many occasions and it seems to be deadly medicine on poor Ole' Tom.