Halo 3 Snipers (Offence)

Snipers are one of the easiest ways to dominate the playing field in either team slayer, objective, or multi team. Notice that I didn't say lone wolves. Lone wolves is not a snipers heaven because there is no team to protect you from your enemies that might be lurking behind your scope. If you insist on retrieving the sniper in lone wolves you should at least be able to simple no scope (shoot and smack combo). Also, lone wolves isn't the best sniping play list because snipers usually get less kills than the medium range or close range specialists. The advantage to sniping is that you die less and can get flag carrier kills easy and help out your team by weakening the other teams players for your team just before they meet and enter the battle field.
Snipers should know the map like the back of their hands. Don't be afraid to go into forge and walk around looking for good sniping positions. Another very important factor is choosing a sniping position that is close to ammo or your team. If you are on Valhalla and you run out of ammo on the downed pelican, you have to return all the way to the base to retrieve ammo.
The third important offensive tactic is steady shots. Take your time and focus on the target. your scope should move slow and smooth with the motion of the target. If the target is hopping, simply glide up and shoot at the crest of the jump. It is easier to snipe the target at the crest and not when it hits the ground because once the target's in the air, it can't move very far. What helped me with my smooth scoping was turning down the look sensitivity. I usually snipe at about a 2 look speed. At first I sniped at a 1 look speed, but found that my defensive weapon wouldn't be able to target quickly, or follow an attacker if it jumps over my head or side strafes to the right or left quickly. Honestly, what ever look speed you want or are used to will work, but the smoother your scope is, the less you'll jerk before the shot and miss.
Finally, we come to teamwork. If you have friends to help you kick ass in halo then use them. Me and my friend always try to do a sniper-spotter combo during social big team or especially multi team. If you miss, your spotter can quickly kill the target that you missed with a BR shot. (If you want more spotter tips there will be a article on it soon) Another advantage to having a spotter is that your spotter can protect you while you scope in on a target. If your spotter gets good, he/she can even spot out other snipers, rocket launchers, missile pods, turrets, and flag, bomb, or oddball carriers. Spotters help you get kills but make shore your spotter doesn't mind getting less kills as a result of protecting you.
Well that's my sniper tips for Offence. Check out my other articles on anything sniping.