The only way I was able to get pellets to enter the barrel, instead of hanging between cylinder and barrel when fired, was to "stage" the pellets by pushing them into the cylinder approx. 3/4 of an inch, past the point of maximum resistance. This helped the double action firing tremendously. The pellets still hang, when the CO2 gets a bit low, but at least now *most* of them will leave the barrel fired DA.
I don't know if this will get better with time, as the resistance of the cylinder "wipers" becomes less, but users expecting to just load a cylinder full of "flush" pellets, then shooting DA, are going to be disappointed.
Charles