The Mosin ammunition (lose stacks and ammunition boxes) only spawn at industrial/civillian buildings nearby military areas.
This is shown at three military areas:
- **Myshkino military tents**
These buildings spawn the ammo: http://img.dayzdb.com/img/buildings/land_guardshed.jpg
- **NWAF (Northwest Airfield) military tents**
These buildings spawn the ammo: http://img.dayzdb.com/img/buildings/land_guardshed.jpg
The blue warehouse buildings beside the airfield spawn ammo: http://vignette2.wikia.nocookie.net/dayz-origins/images/d/d9/Land_Hangar_2.jpg/revision/latest?cb=20151127041637
- **Kamensk military base**
The two industrial buildings to the west directly of the barracks, coordinates (077, 005)