Firing chamber is 100mm id of 12mm = 15085 cubic millimetres.
This is approx .5:1 (if my figures are right )

Would someone please check these figures for me.
Firing 7.5mm bb's @ 150 psi bolt action single shot.
all advice readily received. :bounce:
cubic millimetres
hectmarr wrote:You have to make many weapons, because this field is long and short life