Has anyone ever fired a ribless side by side?

Alex Martin is the best known ribless side by side, probably there are other makes out there.

Reason for asking is to see if there is any strange sound effect in firing a ribless side by side. An experimental one made using a French Robust resulted in an audible clanging, like a bell and would like to know if this is a trait common to all ribless side by sides.

Last edited by Shotgunlover; 12/18/13 03:22 PM.