Just a general question regarding sping air rifle power,when do you change the main spring,is there a test you can do to clearly define what power the spring has in it,say shooting through a particular material at a particular distance,also does anyone know where i can get a manual that also includes the removal of the main spring should i need to.one final question i want to upgrade the telescopic sights i currently have on the gun,any recomendations, the bigger the better.
thanks.