best case scenario is that you fire 2 short bursts, each kills a German, and the Germans destroy you utterly as you laboriously reload your "assault" weapon.
Here is a tip that allows me to run and gun with the bolt action and take down whole rooms of auto's and SMGS.
Simply keep moving. Only stop long enough to take a shot, then start moving again. Every time you move, he has to try and aim at you again, giving you a 10th of a second to get out of the line of fire. When you move, don't run at them, run obliquely sideways, aiming to get multiple enemies lined up in front of your sights so that when you pull the trigger at least one and sometimes as many as three can be hit with one bullet.
At the same time, only the guy closest to you can shoot, because he is blocking his team mates. if they shoot he dies. So you can put him between them and you, and then shoot through him into them, killing two birds with one stone.
There is so much more, but if you do this, you can kill them with anything. I use the bayonet to prove my point, but I can do it with single shots from the bolt too.
You are simply taking advantage of their human weaknesses, not a game mechanic. They have to react to your movements, while sometimes in a panic because of the sudden shock, and they have to try not to kill their own team mates while they do.
I often clear rooms without firing a shot or stabbing anyone, just by running between two enemies and getting them to shoot each other. Sure I don't get any score for that, but who cares, they look like fools and I'm laughing so, it's all gravy.
So, if there is a room with several enemies in it, do not try to "slice the pie" on the doorway. You will die. You will see the first guy, shoot him, and the rest will kill you. What you want to do is run straight in as fast as you can to the very centre of the room, but knowing that all you are doing is trying to see where everyone is.
Then you look for the guy who is closest to pulling the trigger and run sideways from him a few steps while he shoots. He will most likely miss. It is at this instant that you want to stop and fire at him. If he has a bolt he will be working the action, if he has an auto, he will be trying to get the recoil under control, but you have a tiny window of time to stop and take an aimed shot at him. Then start again. The first guy should now be dead and the second guy starting to acquire you, if you have run in the right direction to begin with, he may even be behind the falling body of his team mate, or dying from the bullet passing through the team mate and hitting him.
It takes practice but you don't need good reaction times. You are not trying to take a shot at the first possible moment, you are making sure they can't hit you until the right moment arrives. So I might circle the room twice just waiting for all the autos to run out of ammo then clean them up at my leisure.
In other words, run and gun is actually more tactical than camp and snipe. I prove it constantly. When someone says it's cause I have the MG, I take the bolt, if someone says it's because of sway, I use the bayonet, if someone says the bayonet is overpowered, I show them a screenshot of me crawling at an enemy and stabbing him to death without even standing up.
The camp and snipers have ONE tactic. I have hundreds.