I wondered the same, but doing some searching online, it looks like the HW75 is known for 'low' power. If you ignore the couple extremes (bad pellet/cocking), the spread is narrow enough that I won't worry.
The grip has had some layers of Tru-Oil, and a final bit of pure carna wax on top. It's a little bit too shiny, usage should bring it back to a matt finish in time.
Of course... I also went and bought Mickson's Gamo Centre, so maybe these pistols breed like rabbits.