Worst round of trap I ever shot was a 3 . . . friend of mine had just starting loading shotshells, and this was at the now-defunct Lincoln Park Gun Club in Chicago, where plastic wads were forbidden. Plus, I was using a Savage double.
Patterning later showed 20% patterns, so I was essentially shooting a "spreader" load; I was lucky to get 3.
My employer had a trap and skeet club with its own range, and I shot in the league there for a number of years - took High Gun a couple of times in Trap (Big fish small pond? Actually, more like minnow in a puddle.
) but was inconsistent in skeet. Lots of fun.