I have tried some round ball in my Hatsan, and I was surprised at the results.
The last time I tried this the pellet was much more accurate. But the round balls got there, and were all in a nice quarter sized group.
This time the balls were just a smidge large for the bore on the new Hatsan. So I tapped it in with a plastic screwdriver handle. 5 of them went into one ragged hole. Where the pellets had a larger, but still decent group.
That sharp shooter mold is not fast, but as long as I have lead I can have food for the pot.
That to me is a lovely combination.