Hey chaps, just a quick one...took my CXP out into the woods for the first time in a while...and noticed a very strange thing. Whilst firing the gun I would get random bb's just fire out the gun and land about 10mtr in front of me, the next would range out to where it normally shoots to. I am running promy purple with promy nub in it..adjusted the hop to it flies to where I want it too..but still get random bb's just drop in front of me. Hop issue, air leaking around the piston? Anyone experienced this before, able to offer a few pointers? Should I just put back in the standard rubber and nub. (Shooting .28's)