.... shooting the gun i got aware of the lousy muzzle velocity of the gun. 699 fps. That`s not enough for a .25 pellet to do some serious grouping. It was horrible. Four inch groups at 50 meter.
The transferport measured 3,3 mm. I took a drill and brought it to 4,2 mm.
Same goes for the powerwheel.
Putting more pressure on the hammerspring didn`t work. One turn of the adjustment bolt was the max, more than one turn and the gun wouldn`t get cocked. The hammer is hardened.
The short valve stemdoesn`t help to get the pellet going.
Very simple valvehousing. That`s great.
To be continued.........