I recommend using a trebuchet in this endeavor.

Perhaps a tabletop variety for some of the smaller instruments, lobbed solo, or the larger castle size for instruments and their operators.

Since the piano is my instrument and this instrument has been assaulted for years by those who wish to test their weapons and have decided not to lob cows, I can safely say that just about anything else (with the possible exception of an Aeolian pipe organ) could easily go the distance.

Just a suggestion.

SRS