Fast burning powders such as Red Dot and 700X tend to throw open patterns. Slower burning powders like Green Dot and 800X tend to throw tighter patterns. The amount of powder will also effect the shot pattern from your barrel/choke combination. Windjammer wads have 8 light petals and throw a wide pattern. Winchester AA wads are stiffer and the old Activ wads had 4 petals that were very stiff and consequently throw a very tight pattern. Some good combinations for trap shooting are Red Dot/Windjammer for 16 yd. line. Red Dot/ Winchester for handicap and Green Dot/Activ for 27yd. line. Load different combos and shoot lots of paper to find the best recipe for your shooting situation.