its managable to count, jea, but somtimes a bit hard to count with the semi automatic rifles, while i use them to charge and to "snipe" from midle ranges behind cover, so, while shoting some rounds, then geting under fire and shoting again, its a bit tricky to tell when you have the last shot in your mag fired (and that sometimes makes realy the difference) since you cant see when the gun is empty, but in fact in real, you woud have the bolt from the semi rifles stay open when you fired your last shot, this is a useful and even realistic cosmetic feature, that shoud be in game one day and let you always now, uh when your semi rifle is empty.
it hapens not that often, but somewhat occasionally, that i fire 1-2 round, kill a enemy, get another one in sight, and nothing! The gun is empty! With a reload before, i woud have killed this guy, but i wasnt able to see that, the gun does not show it. It bugs me just sometimes a bit. I ushualy reload my rifle always after i fired a couple of shots, but sometimes you just forget it or think, there is enough left, and i hate it with the semis, to have 3-4 "very light" magazins in my bag
Hope it will get fixed one day, because its already a issue since the mod times!