I've got the solo, same problem. I had received some unpolished .2 bb's as a gift and they sometimes jammed when I tried them in one of my cheaper guns, (tested before daring in anything else). They do however stay inside the goblin shells much better. I think they were either cybergun or ultrasonic, could have been cross man too, (I'll dig them out and post again later). Test firing showed them not to shatter at 400fps 5' against mesh mask, or goggles.
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