Descripción de Fallout 3 Operation: Anchorage - Glitches:

How to keep your simulation items and how to get unlimited amount of .308 Caliber Rounds, 10mm Rounds, 5.56 Rounds and Shotgun Shells. NOTE: There is one known glitch in the ammo glitch =D. After doing the ammo glitch for an extended period of time the 5.56mm ammo suddenly disappeares. Looking at the weapons screen it can be seen that the player has negative ammo, -32176 5.56mm Rounds (last known amount 33120 before drawing 240 from the ammo dispenser). This is due to an integer overflow (the game designers didn't expect you to have that much ammo and thus there is no safeguard). The integer in question seems to be the ammo on the ground as once 33000+ 5.56mm bullets were collected in the inventory then dropped the number switched to a negative. But if stopped at a lower number (say 28000) the bullets remained fine and the glitching could continue (example: Gained 28000 bullets then dropped them out of the way and worked up another 28000. The result when picking up the first set was a combined 56000 with no negatives). It can be assumed that this can be repeated as long as a single ammo item on the ground has less than 30000 bullets in it. Another option would be to use the Quartermaster as a 'gore bag' of sorts similar to Gary and just deposit your ammo onto him at certain intervals. For more detailed info: http://fallout.wikia.com/wiki/Operation:_Anchorage_bugs