Many moons ago, I tried a similar setup with my Ion (Ion with low rise elbow, Custom adapter for identical elbow on Qloader socket). I shot the following video with some fresh Marballizer:
The very next day, it was blender city with the exact same case of paint, kept in a cooler. I was sure to get the length right (to prevent chopping rounds in the socket), I reduced the number of pre-winds down below the recommended 8, but I never figured out exactly what the problem was. I tried all sorts of changes to the gun to get it working: magnetic detents, spring detents, no QEV (for slower bolt travel), lower pressure (and higher dwell), replacing the eyes (which appeared to be working). For a couple months, I was the guy who had the reputation of showing up at the part, to work on his gun...
I switched the gun over to a warp (intellisynced with a Virtue OLED), and the problem went away for good, and it handles differing bolts, a QEV, High or Low pressure, with no trouble at all.
My final suspicions were (I never isolated it):
- Fixed hose length doesn't allow for tiny amounts of hose flex to compensate for varying ball sizes (from case to case or even the same case as they day gets warmer, this would lead to socket chops during pod changes).
- Fixed hose length doesn't allow balls to travel the necessary handful of milimeters back up the stack to prevent bolt clip.
I really wanted to use this system- I slugged through three years with the QLoader and I still have all of the pods/equipment. The last time I set it up was a direct mount onto an SP-1 with the pre-winds way down (6 or less), and it worked fine for a chrono session.
I'm not saying you've got a bad system. I'm really hoping that it works for you. If it works for you, then it must've been something else with my setup.