Hello Chaps,
I don't have any particular comment on the following, except that they're provided for anyone who might be interested in seeing them.
There's not an awful lot of information about the little Flobert shells online - that I can find anyway - so these are published here to add to what little there is.
These are example 5-yard, 10-yard, 15-yard and 20-yard patterns from a 9mm, cylinder-choked garden gun, using the Fiocchi 7½g / #7½ (Italian) cartridge.
I believe individual pellet energy at 15 yards is around 0.7ftlbs for reference. Circles / part-circles on the images below are 20".
I hope this is of some use to someone, at some point.