I have to admit i'm a little surprised that the two best pattern density were BB and #4's. Big range in shot size between the two. Obviously a lot more pellets with the #4's. Question is, in that smaller shot size, it sounds like he still has an issue with knocking down birds with a cheaper load. Lots of pellets down range doesn't mean diddly when they aren't penetrating and knocking the bird down. Finding point of aim vs point of impact is important also, which is why I pattern on a a 30" target. Trial and error in the field really is what sells me in the end I suppose. Find something that works and shoot it. May be 1 or 2 different brands and shot sizes. Of course situations vary and you have to adapt. There is no magic shell unfortunately. I don't mind spending more per shell, when it means the birds die. I buy the best I can afford.