When it comes to sniping in general, I used to be awful at it. I'm still no pro, but I decided a couple months back I wanted to get the Scoped In booster to gold.
Being awful at sniping, it was very difficult at first. I didn't think I would ever level that booster up. But, at some point I started to get it down. Next thing I knew, getting The Long Ranger medals became rather easy. By the time I got Scoped In to gold, I was pretty handy with the sniper, both the Dragon and T-Bolt.
I'm sure there a good chance you already have Scoped In gold, but if not, I recommend leveling it. Not only will it help once it's gold, but it helped me with my overall sniping performance just getting it gold.