U3 compact .22. JSB 18g, Hades 15g and Crosman 14g used for this. Orion's magazines operate perfectly. AGT and Eagle Vision jam when the muzzle is tilted up at all. Cudos to Orion for the value provided with his iteration!
So to add to my rushed previous post, here's what the pellets looked like when the misfeed would occur with AGT mags. When I would clear the rifle some would be wedged in the mag and some would actually be wedged back in the probe's recess, requiring a pick to dig them out! Hades were the most susceptible and are the ones in the pic. I was attempting to take multiple shots up into the trees and found it impossible to cycle the action at any upward angle. Same thing with the Eagle Vision mags, which was really disappointing as they are very nice pieces otherwise. I initially thought the probe might be bent however that does not appear to be the case after having 100% success with the Orion mags with all the ammo.
Anyone else have experience with this issue? I found a couple of threads with an older Uragan and a Vulcan that seemed similar but not much else.