Well, after the shots, is your mag totally out of propane? If so, then it might be that for some reason you're not able to fill them properly. My plastic AI propane adapter is getting that way. The tip is getting all deformed and sprays propane in all directions when I try to fill up a mag. And I too was getting the same result - about 4-5 shots out of the mag before the thing was completely empty. I slightly enlarged the tip on a butane apapter kit and fit if on top of my propane adapter and it works well - at least as an interim measure. I have a Madbull metal propane adapter that should be arriving tomorrow and that should fix that right up.
__________________
|