It is how the game is designed although I wish it wasn't.
One of the things I hate about the game is the ability for people to stockpile weapons. They buy weapons and stockpile them on the ground. The reason they can do that is because the game is designed that the ammo stays with the weapon. That is how someone can drop a weapon and multiple magazines/shells/canisters/rockets/whatever are still magically attached to that weapon. That is why when someone equipped with dual pistols drops one and his pistol ammo is halved. He dropped half his pistols and half the ammo went with it.
Personally, I'd prefer the ammo stick with the person. That way any dropped weapon only takes a single magazine/load of shells/canister/rocket/and so on. Of course this means no more stockpiling weapons which I consider a bonus as well.
One of the things I hate about the game is the ability for people to stockpile weapons. They buy weapons and stockpile them on the ground. The reason they can do that is because the game is designed that the ammo stays with the weapon. That is how someone can drop a weapon and multiple magazines/shells/canisters/rockets/whatever are still magically attached to that weapon. That is why when someone equipped with dual pistols drops one and his pistol ammo is halved. He dropped half his pistols and half the ammo went with it.
Personally, I'd prefer the ammo stick with the person. That way any dropped weapon only takes a single magazine/load of shells/canister/rocket/and so on. Of course this means no more stockpiling weapons which I consider a bonus as well.