Dreaming100Straight
New member
Mike is correct. I was thinking grains of powder.
18.6/70---This is the chamber diameter, 18.6mm which equals .0632", the diameter of a 16 guage chamber. 70 is 70mm chamber length.
16.5/17.1---16.5 is the diameter of the choked portion of the barrel-16.5mm which equals 0.649". 17.1 is the diameter of the 16 gauge bore-17.1mm which equals 0.673". The degree of choke is 0.6mm or 0.024". This equates to an improved modified choke.
shot weight is 34grams of 0/0 by Nobel Sport