At best you can ambush people from a concealed position, but the range & accuracy isnt going to be any better using. Buy a Tiberius Arms Marker (t8.1, 9.1, t4) & use First Strike rounds. Your not going to be able to snipe with regular paintballs.

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Never being content with your gun means your always ready to improve it.

ok heres how i got good at it i got a tippmann tpx and learned how the paintball works and how much different it is then bullets then i learnd how to pick a choose my shoots and make them count. after tht i started to use my 98 custom and get used to the effective rang and accuracy. then i learned how to not keep my eye on one target but look everywhere and see everything. then make the shoots count

Number one rule of sniping is patience.

Arson, Madasax, Bad Magic and Mike pretty much summed it up!!

And +1 on recommending the CCI! I shot one yesterday and wow, I'm in love!!

Yup, i got my phantom for a steal and love it everytime i got play. Only thing to get is the detent rings to prevent rollouts, I use my phantom almost everytime i go play now.....although i just got a T8 the other day and get to use it on the 21st.....
Gonna run pump and pistol!

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Although I'd prefer to use one, you don't need a pump gun to "snipe." Personally, I use a custom 98 with a 14" barrel and can still get some good eliminations. The Keys to being a good sniper is moving quickly but quietly while keeping some distance from the main area of action, having good accuracy, being able to make the best of your position, and being able to be calm and not overkill on a player. I would suggest using semi-automatic markers and fire single shots with time between each shot, allowing for you to observe the path of which the balls are going much better. From there, you can adjust.

Also, what i like to do is stay around the main area of action, allowing me to see the action while at the same time getting around it and shooting from behind the enemy. but this is a timely process of getting to that advantage, and takes more patience.

All of the above ideas and tactics are great.

Oh yeah, one more thing, invest in an anti-fog mask if you dont have one!

Wait for the shot to come to you, take the shot and move to a new position. Also don't rush.