Now I will throw this in. I have a Nova too and I have a hasting choke in it. The HeviShots are great, but were a bit salty for me. I used a 3 1/2 #5 Federal and got a great pattern. It will depend on your gun and set up. Get a few different shells for different brands and sizes and pattern at both 20 and 40 minimum and see which does the best. I start with a piece of white poster board and a 3" circle. Shoot and see where it goes, re-adjust and keep it op till you have a tight pattern in the circle.