A few quick tweaks to Hardcorio's ammo to make it less inventory intensive.

Complete list of changes: * Uranium rounds now use U-238 instead of U-236 and are called Depleted Uranium rounds. * All ammo stack sizes have been increased by 5x. (Bullets: 20 -> 100, rockets 5 -> 25) * 5.56x45:
* Recipe yields 2 mags
* Magsize: 10 -> 50 * 7.62x39:
* Recipe yields 2 mags
* Magsize: 6 -> 30 * 12.7x99:
* Recipe yields 1 mag
* Magsize: 1 -> 10