If you have a 22 or 5.5mm barrel is that measured from the top of the rifling bottom of rifling? Are pellets naturally made larger than 5.5mm so they will engage the rifling?
If you have a 22 or 5.5mm barrel is that measured from the top of the rifling bottom of rifling? Are pellets naturally made larger than 5.5mm so they will engage the rifling?