the weight of one's weapon(for ME anyhow;-)). Rather excluding all the heavy springers that were grand shooters on the range. My pick for a field gun in days of yore would have been a Sharp Innova..22,quick to the shoulder,a very flat trajectory and deadly out to forty yards. The Innova(at $78NZ) was a 'best buy' at the time.Fitted with a snazzy -made silencer it was the complete package.Peepsight,and light as a feather. Of course,just a personal preference. NZ's Innova's were unmodified giving as much power as possible. Pumping was a real chore after 4-5 strokes but with practice and effort the 900fps could be topped(and-in .177 over the thou). Think I'll get a bracket fitted to my Zimmer frame.....