There is no standard choke that will work for any gun. You need to pattern all of them. I would try modified too. If you don't pattern it's more than likely it's not patterning well. Sometimes the ammo won't shoot good out of any chokes and you have to try a few brands. Earlier this year I bought 3 types of #4 buck. Tried out of 3 guns with multiple chokes and had no luck. After that I bought a 35 dollar box of wingmaster bb and had no luck with that either. Next I tried dead coyote t and found the right gun/choke combo. Over a 100 bucks in ammo but I know it will drop a predator in it's tracks every time. Hope this helps.