Okay, before we get on to the sniper tactics. Think to yourself, do you need to use the sniper, are there better uses for you. If your in a squad, ask the squad leader, or make your own sniper squad. DO NOT TK FOR THE SNIPER KIT!!
Okay, now to the tactics.
Know your weapon, for example : No.4 scoped, know what it can do.
Know your limits, lets face it, not everyone is the best shot, so dont waste countless amounts of ammo on distant targets.
Stick to targets, dont fire at one soldier, and switch to a target, he is likely to come looking for you.
Use your anti personel mines, added protection.
Choose a location, make sure you can see, but cant be seen.
Change location, after killing max 10, min 3 guys move to a different location.
If possible work with a squad.
Work with support, call in motars, call in targets.
DON'Ts
Don't lay down mines all over the place. Don't TK for kits. Don't take the kit without thinking.
Regards guys
rob