I seem to be going through Argon very quickly while using the Miller Sycrowave 200. I'm using an 80 cubic inch bottle and the regulator pressure is set around 23. I have been welding 3/16 inch thick angle iron and making 3 or 4 inch welds at a time. I'm due for a refill now. The last refill was a month ago. Does Tig use more gas than other methods (Mig).