To check your velocity go to a paintball field and ask if you can use their chronograph. Put your barrel over the thing and shoot your gun. If its over 300 than turn the knob on the back of the tube counter clockwise until it is a little under 300. Also put a drop of Gold Cup oil on the oring on your co2 tank and also a drop or two in your asa (air source adapter, its the thing you screw your tank into). This will keep your internals oiled. Buy a squeegie too in case you chop a ball and learn how to disassemble/reassemble your marker on
www.ottersccustoms.com When you chop a ball take out the bolt assembly and wipe off the bolt then squeegie out the top tube of your gun and try to get the paint out of your feedneck if their is any then put it back together. When you do chop a ball don't shoot more until you clean it or you will just waste paint and have a big mess to clean up.