There is nothing wrong with the cocking effort of a V10 guys, its about average for this type of gun.
For the record, the original stock figures for the 6004 from the manufacturer were 400 fps. The reality prior to the modification shown above, is approx 300-330 fps, moving to approx 380 fps post modification. There is a little more from piston packing but this simply puts the cocking effort up to what a P17 is due to piston head almost dead heading, but doing so will give you manufacturers figures....
For the record, do not try to piston pack a V10, the top strap will give...its only something i would recommend with metal top straps....
Finally, the Daisy in its 747 form, was very underrated, easy cocking with the long lever, quiet due to the long barrel, accurate due to the long sight base...A little muzzle heavy due to the lever....plastic loading bolt not so great but functional....365 fps..
Recent experiments of mine (on any of these gun types) concluded that tandem O rings, duel sealing on the main piston gets more velocity. My suspicion is that some blow by occurs from a single O ring due to compressing a large volume of air down to a tiny valve pressure too quickly, some of the pressure slipping past the single O ring, but shored up by a second O ring, the pressure to wall of the first O ring is better retained...
It surprises me that a manufacturer like Crosman did not explore this system more. A pistol of say Baikal 46M proportions should give approx 500 fps and would not be that expensive to produce using their 1377 sort of layout, with barrel over cylinder. It is so much more convenient and consistent without all the pumping....
