Know i know that everybody knows this bug, almost every dirty bomb player knows about this bug and uses it.
Its at this point a feature realy.
However its still a bug and this bug could be removed without taking away the short reload time.
Simple fix would be to create two separate reloads, Full and Empty mag reloads. While there is atleast one bullet in the mag the weapon reloads faster and while there is no bullets left in mag it results long reload.
Many games use this and i dont realy see reason why it should not be used in dirty bomb. Its better than using a bug (and this bug does not realy benefit the Bishlock, which is propably the only weapon that does not benefit from this bug).