C-Bug.

[HaZe]

Generally game developers tend to have a goal; Make the game as realistic as possible. It is not very realistic to have a weapon automatically reload because it becomes out of use for a period of time. Rockstar have stated in different interviews throughout the years from different gaming companies that they tend to improve the graphics to make the game more realistic. Obviously however, there is no definite way to find out whether rockstar did intend it to be this way, perhaps they did leave in and didn't realise the effects it would have since GTAA was not intended to be a multiplayer modifcation.

uhm obviously GTAA isnt realistic at all, so that's irrelevant.