I have a new Theoben Fenman .177 about 1 month old. Put it through the Chrono and with Premiers (Which are the most accurate so far) AA Field, Accupels its coming out at just over 10fpp the only pellet that boosts it is the H7N Hollowpoint which take it to an illegal 13fpp. 2 things, Does anyone know how i can increase the power slightly ? Also every rifle i have tried H&N Hollowpint on they come out at least an extra 2FPP more than any other pellet. Anyone else encountered this with these H&N's ?