Gotcha, assuming the 600 grainers are Dixie. Are you hardening them yourself. Last I had from there, IRC, they were around 16 Brinnell.
Have done slug work with Benelli 90 in smooth bore. Very versatile as to components, and great accuracy for smoothbore. The lock-up has a lot to do with that, IMO. SBE should be of same quality, and just as easy to weight a bit, and still retain some balance for offhand and carry.
