For those that don't know, CO2 is rather unique as a compressed gas at normal room temperatures. If the pressure is increased beyond the threshold pressure, the additional CO2 will not just increase in pressure (like it would if you were filling an air tank), but will drop out and turn in to a liquid. That's how they can sell CO2 tanks based upon liquid in the tank. The pressure won't begin to drop until all the liquid is out of it. Of course, that threshold pressure can and does change with temperature too.
When I made my Hawken .45 I made three tools to screw on the ramrod, one was from a cork screw to get out a lost patch, two was a small drill bit soldered to a bit of round brass to drill a hole in a lost ball, three was a wood screw in brass to screw into the drilled hole in the ball and T handle on rod, pulls em out. I`m glade I did this, I know dry balling saves a bit of powder, but things don`t go Bang!! when you want them to.