OP here again....
Side question to the 20 gauge TSS shooters:
Federal sells a 1000 FPS as reduced recoil and a 1200 fps load.
See any amount of performance difference?
1000fps is plenty. You only need speed if you're shooting past fifty yards to flatten the trajectory. The pattern stays tight enough you can see it start to drop fast past fifty. If you shoot the 1000fps out of a 28" barrel you will likely have a hearing safe rig. Which is important considering how much turkey hunters need their hearing.
My .410 with TSS handloads outperforms the 12 gauge lead turkey shells I used to use. Easy to miss with, though. That's why I pull out the "big 20" until I kill the first one.