Anybody know what the significance is of the round dot, not decimal point, following the head stamp F A 31. on a fluted cartridge. My keyboard does not have the proper character. Thanks
The dot on the FA 31 was used to indicate a different manufacturing process. 5-draw instead of 4-draw.
See Punnett 30-06 page 221.
Several other years with dots are know and most of them are quite common esp. on dummy rounds
please see below