Ex. A
1. Find magnum speedloader on the ground, but do not pick it up just yet.
2. Press TAB to open inventory, right click magnum speedloader in vicinity.
3. Select "Empty" from the context menu.
Result: Speedloader is empty, but there are no rounds on the ground.
Ex. B
1. Find magnum speedloader on the ground, put it in your bag/pocket and not in your gun.
2. Press TAB to open inventory, right click magnum speedloader and select "Empty" from the context menu.
Result: Speedloader is empty, but there are no rounds on the ground or in the bag/pocket.