I'm 67, and I can remember 2 9/16" 16 ga. shells being common in hardware stores around here. Sixteen gauge guns were very common ................mostly A5s. This was serious dove and quail country, and many had found the 16 well suited to that usage.

I have a full box of them in my shop, given to me by a friend who owns a gunshop in Savannah.

SRH

May God bless America and those who defend her.