Depends on what gun you shoot, my Knight TK 2000 is rated for 120gr of powder and 2 1/2oz of shot

My 10ga Pedersoli double is rated for 109gr of powder and 1 1/2oz of shot

The CVA offering is rated substantially lower at 1 1/4oz and 100gr of powder i believe, the T/C offerings are somewhere in there also! They all work regardless of the amount of shot they push, a small percentage of pellets hit a turkeys head/neck anyway! What you want is a dense cluster of pellets that is true to you POA, regardless of what the payload is, as many of these guns produce sub par patterns when loaded to the makers max recommendations!!!