This is for when you're in the mission when you have to sniper seven guys plus a dog with 5 shots to get the achievement 'Professional'.

First sniper the guys in the centre, hit the crouching guy in the head and it will blow out the guys hip.

Next take out the two on the right. This is a little bit tricky but you should aim to nick both of the heads with the bullet.

Now the hardest bit for some people, the guys on the left, people say to shoot them with 2 bullets, then to double kill the guy and his dog, but if you walk further to the right you can shoot like the 2nd shot you just made and nick the crouching guys head and other guys leg/hip

Then wait for the last guy to come and nail him while he's crouching, and if you did my way then you can get the dog.

If you used 2 bullets on the 5th and 6th guys then you must wait until the dog is behind the guy and then double kill through his legs.