Back in the mid 80s, I was the president of a trap and skeet club in Rockwall, Texas. We had Gene Seers come down from Oklahoma and do a lead reclamation on our fallout areas. He reclaimed several 55 gallon drums of shot. It was all lead shot back the, but it varied in size from #7 1/2 to #9. We sold it back to our members at very cheap prices.
Even though it varied from #7 1/2 to #9, I was able to load some very good 1 1/8 oz. practice loads using Active hulls and 1 oz. wads. You want to make sure the reclaimed lead is washed, sorted, and prepped correctly. If you look at reclaimed shot under a magnifying glass, it will have the appearance of a small golf ball.
Back in the late 70s or early 80s, it was rumored the Russian Olympic Skeet Shooting Team apparently tried using square pellets. The idea was, it would give them a larger more dense pattern. It seems they were caught and disqualified.
I do not compete in shotgun competitions any longer, but based on my past experience with reclaimed lead, I would have no problem using quality reclaimed lead.