I figured I'd share a couple photos of patterns out of my Winchester 1300 20ga 28" with a Carlson .575 extended choke using 3" Federal Heavyweight 1.5 oz #7 for reference. I've seen a few guys shoot this particular shotgun but there is very few photos showing patterns.
First up is 30 yards. Minus a few that flew off the poster board.
Next up is 40 yards.
Looks like you are ready to go hunting!
nothing wrong with that...good luck
Nice. I may need to try a Carlsons for my daughter. I have her using a Rem Full in an 870 to get an open enough pattern at 30. The Trulock was perfect if I was shooting it, but a little too tight for a beginner. That looks like a perfect combo.