Originally Posted by Sacre
How do you avoid overfilling? Do you just count to 8 while filling or something of the sort?
And wouldn't this number increase as your giller tank starts to lose gas/pressure?
Overfilling is not really possible.. the mag will only hold so much gas in a liquid and gaseous state.. if it is really cold out you may be able to get more liquid in.. but for that to happen it would probably be too cold to shoot anyway.
as long as you are making sure your source tank is upside down when filling and you are transferring liquid to your mag the pressure in the source tank is constant at a given temperature as long as liquid is present.