true, but every round fired impart forces on the weapon, and also the shooter.
newton and all that.
and its not just the explosion and that stuff, there is also the movement of parts of the gun and similar (semi-autos and all that).
question is how much this can be applied to energy based weapons like those found in star wars.
shadowrun does this by applying a system where every round but the first in action will effect the accuracy of the gun.
and why is it that even with a 3 round burst setting, real life cops using mp5's still use it like a semi-auto gun with a large ammo capacity? accuracy and control. the moment they go burst they risk hitting someone they dont want to hit. its funny what one can learn from watching tv (discovery etc)...
still, ones one start down the slippery slope of accurate simulation of guns there are stuff like different guns and ammo have different recoil. the AK is all over the place while the M16 is much more accurate and so on...
guns are bothersome that way
hell, the moment you strip away negative effects from burst fire, everyone start using it. this means they will overlook the pistols and other weapons where you cant burst unless they need them for their size and similar (ease of hiding and all that). and even then you can get guns that fire burst in a small package. glock 18 anyone?