Very very strange. I had logged into the same Stable Regular (not Hardcore) server I was on last night and ran around and looted up a bit. Then I hit "P" and realized there was hardly anyone on my server and I wanted to join one with more people, so I logged out of the low pop server and joined a higher pop server. When I spawned, I was in the exact same place with the exact same mosin, clothes, backpack, etc - except all items stored in my mosin (compensator, scope, ammo) and clothes/backpack (food, ammo, chem lights, etc) were gone. Anything in a storage slot was gone. I panicked but then had an idea - I logged out and logged back into the original low pop server I started on, and amazingly all of my items reappeared in their inventory slots. Very strange.