I was just thinking, probably borders on danger, but I think the 9,3X74R & the 3,5 grams of GBP were more coupled with the 108,49(8,89mm) plug gauge stamp than the 118,35 but the variation is only one choice. Plug gauge fella might have felt poorly on Monday whilst he was pushing. Theose plug gauge numbers are the same as 10 bore, 12 bore, 16 bore, etc. being the number of lead spheres to the British pound. At one point the French had their contorted equation to their unit of measure.

Kind Regards,

Raimey
rse