[GreekDiver]

Originally Posted by dave

Actually that is not quite true.........
A 13mm barrel will give you more power for the same internal pressure, but with a corresponding increase in loading effort (you cant get something for nothing). The major limiting factor on power is loading effort. There is no advantage in having the gun at a lower pressure
cheers
dave
Spearguns by Spearo uk ltd finest supplier of speargun, monofins, speargun and freediving equipment

Lower pressure seems easier on the trigger sensitivity and less stress in the gun internally So there are some advantages