I shoot a Mossberg 500, 3" , 26" accu choke barrell, w/ mossberg' s own xx-full choke. I use Nitro ammo 5-6-7 1/2' s multi shot load, and get a whopping 35 pellets in the head(yes the head, not whole target) at 40yds. Before I tried Nitro I had tried Win. high velocity #6, 5, and even 4' s. Remington 5' s, and best I could do with any was 9-12 pellets in the head at 30yds.