Well I'm sure MadMax would be able to give us a good answer on this topic since he's the cazy GBB sciencetis.

When I load the BBs into the mag that had gas in it over a long period of time it feels that the gas is weaker for some reason. But I still shoot all 24 shots just all of them are weaker. When I refill the mag again it shoots fine and strong. Odd but has anyone else had this happen?