Level 1 Ammo and Level 1 Photon Ammo is just simply too expensive, it is very difficult to make money and level up gear and buy ammo and simply progress in the game without spending real money when ammo is such a massive drain on income. Killing NPCs costs money. Make it so a NPC kill pays enough to buy double what you spent killing it at least as many games of this genre already do.
Especially since many players like to PVP alongside PVE and questing, it makes it even more difficult to make reasonable progress in the game with the high cost of ammo at the moment.
Currently 1500 for 100, that's a lot... I think 1000 for 100 would be fairer.