Too, off the cuff, the 16 gramme bullet would seem to pair w/ the 9,3X74R. I have looked closely @ the lower tube and evidently the marks were worked off for the kalibre. I would think that if it were 0.410" it would be marked 13mm(????) or similar and would wear the Nitro stamp.

I wonder how the 9,3X74R dims and the 0.410" dims compare?

Serbus,

Raimey
rse