I have the 835. I shoot a Factory XX Full Turkey Choke .670 and Remington Magnum Turkey 3" #5's. At 43 yards I am getting 28-35 pellets in vitals. Using the same shell but #4's I only get 17-23 pellets. I have used the Primos tight wad which is .660 and it threw a looser pattern that the factory choke.