Not really. In the gasbottle the CO2 is liquid, and it gets the chance to expand and boil to gas in the buffertank (ideally you would want it turned to gas before it reaches the buffertank but that is not always possible). So you always have more gas in the bottle than in the buffer (unless you have like a 5 liter buffertank but that would be just silly in a feather) until all the liquid in the gasbottle is gone.

The trick is to make sure your buffertank and pipes get the chance to heat up again. The boiling process of the co2 is drawing heat from its surroundings and freezes the pipes, valve, tank, anything it can draw heat from. The more time it gets to settle and thaw out, the more pressure it can build.