Ever tried loading Degtaryev disk magazines by hand? I have, and it's not exactly a pleasant experience. Various devices exist to ease this process. Sadly, they weren't perfect.
"Photo #5: Overall view of Abramov's loader without the feeder or disk.
Photo #6: Filling of a magazine using Abramov's loader. The feeder is disconnected (rounds are fed by hand)
Photo#7: Damage to rounds that jammed in the magazine during loading.
Damaged rounds when loading DP magazines with Koshin's loader.
And another fun one (no indication of what system it "belongs" to):
