When you are shooting with the sniper rifle, quickly switch to another weapon and then back to the sniper rifle in order to byass the firerate limit (you don't cock the rifle). That way you can shoot the entire magazine in 2 seconds. Seen it, done it, it sucks. This thread is about the bug, not the Sniper Rifle or the Scout.
The rate you can shoot with switching makes it a decent weapon. Crouchfiring, however, is a bit much, but you do expend a lot of ammo.
Naa, Rzr saw the scout rifle actually kill someone, so he threw a hissy fit and nerf'd it. Weeeeeeeeeeeeeeeeee useless scout except for unbalanced things EG: Sab.