Board Thread:General Nerf discussion/@comment-27306930-20180806044815/@comment-27306930-20180808022227

Short answer, it tries to load more than 6 darts into a CS-6, and more than 12 into a CS-12. It's simply not sophisticated enough to figure out what type of clip you're using. The only one it can figure out is the CS-30 because it has that special notch on the forward edge of the drum. It doesn't appear to have any way to identify other clips/drums.

BTW, you can hear it groaning trying to load dart #7 in a CS-6. It sounds terrible. There's no way that can be good for the motors. And OMG, those poor batteries !