my experience seems to diverge from your most shooters i played had either firemode selection or at least fullauto which let's the player control the burst length i.e fire just one bullet.
now that ammo is no longer unlimited i thin it would make sense to allow the player to conserve ammo by firing only single shots. why would you want to fire a burst at the opponents head if the first shot is sufficient?
maybe this can be modded later.