I'm playing on X1 and I'm also using the mors sniper, this is my first CoD ever so I kinda suck at it. Quick scoping enemies that are fairly close to me is what I have yet to get the hang of. What is your class set up?
The best way to get better is to play FFA. You'll learn the Maps, Awareness, Gunskill, and eventually start watching MLG streams cause you will learn a LOT from Pro Players. Also, don't be afraid of Reg Guns. Using an SMG and hipfiring is one of the best ways to get muscle memory for sniping, cause when quickscoping you hover your crosshairs over the person, then aim in and snipe.
And quickscoping tips that cross-over from every cod:
Use a higher sensitivity, whatever you feel comfortable with. I use 8 for sniping, but I'm a competitive player so it's different.
Stand COMPLETELY still when shooting, any movement will screw up accuracy.
After shooting do the 5 D's of Dodgeball so you stay moving and don't get hit.
And don't be afraid of a Hardscope. I'd rather get the kill than get killed

and you can pull a pistol if the other guys using a Reg Gun. No Shame
