How,To,Get easy ammo first of all you need to have gotten to chapter 6-2 the main deck when you 
fight the Uroborus give sheva the ltd (laser targeting device)
then everytime he drops those little guys kill all of them and they should have loads of ammo less 
ammo drops if u repeatedly do this on the same difficulty try switching them around also if you have 
any questions send them to Gavin1934@live.com