This occurrence took place in US server 4272. I spawned just south of Nizhnoye, making my way to Berezino. I initiated a picked up .380 rounds (24 count) from the floor of a red one-story building -- I should note they were actually in the inventory of a collard dress on the floor. I also picked up two (2) IJ-70 magazines. One magazine had 7 rounds in it, the other 4. I proceeded to unload the 4 rounds from the one magazine to combine with the other. When checking my inventory, they were not visible -- as if I had never picked them up. None of the .380 rounds that I had picked up were showing.