I've got the same gun and factory choke. If you want a good starting point then I would shoot what the gun is intended to shoot. A 3.5" copper plated lead High Velocity Turkey round will tell you what it can do 'out of the box'. Then you can have base reference at different yardages. And if you get a different choke or shot shell, you will always know if the gun gets better. My 2 cents.