I have recently bought a mk 1 hw80 in 177 its in realy good nick but the power is low 650 fps
i am sure I have enough spring pressure but the piston seal is very tight , I also realize that if I ask ten different people the question I will probably get twelve answers !
But here we go how tight should the piston seal be in the cylinder ?
did weiraugh make different cylinder bore / piston heads in the early ones ? cos this one is really tight
cheers for any advice (i am fairly sure this is causing my power problem )