If your aim is not good, or is not quite what you want it to be, there are several ways you can work to improve it. Most people can hit the target almost every time when they are not rushed in any way. If you have the time to slowly take aim and think about your shot, you may consider yourself an accurate shot. However, this is paintball. You will rarely have the opportunity to slowly take aim and think about anything. You must learn to be both fast and accurate.
A common problem among paintball players is the inability to quickly raise their guns, take aim, fire, and actually hit the target. It takes practice to be able to do this in a matter of a second. Try practicing with your gun. Do not actually fire it, just simply bring it up from the down position quickly and take aim. The trick here is to be able to instantly focus on the target. Keep doing this exercise until you can bring the gun up and be instantly focused on your target. Use different targets for this practice. Once you feel like you have the hang of it, add paint. Bring the gun up quickly; focus instantly on the target, and fire. Practice this until you are hitting your target almost every time. Again, use different targets.
You need to practice with moving targets as well. Team up with a friend and take turns being a moving target. Another point that you must take into consideration is distance. If you can hit your target when the target is close, but you cannot hit the target when it is farther away, you need more practice.
You must also be able to hit targets while you are in motion. Moving targets, as well as targets that are not moving. Practice with your friend. Consider making an obstacle course as well. In your course, include jumps, crouches, quick turns, and any other situation you may find yourself in during an actual game. Go through the course until you can hit the targets the majority of the time, and then change the course around.
Make sure that you keep practicing between games.
Chirstopher Reeve is the owner and operator of PaintBall-Tips.com (http://www.paintball-tips.com) where he discusses on how to get started in playing paintball and advance strategies.