Modern Warfare 2 Help (PS3 Only Please!)?

Hello Everyone, I would like to ask if I could practice my (terrible) Quick-Scoping on someone, I am finding it very difficult, I use the Intervention - FMJ and I am absolutely terrible at Quick-Scoping, So I would like someone to help me, I would really be grateful if you can help. Thanks ever so much! Haseeb. (My PSN (PlayStationNetwork) ID is hkhan49. Thanks again.