How to Tune your Marker for your Hammerhead System
Always use a chronograph for the final velocity check!
Hammerhead technology allows you to visually tune the barrel for optimum accuracy. First, choose the correct Hammerhead Fin (see below) size for the paint you are shooting. Next go to the chrono area and intentionally turn your velocity high. While aiming at a chosen target approximately 100 to 120 feet away, fire about 1 ball per sec and slowly turn your velocity down while shooting. When your max velocity is above about 280 fps the paint will be flying in huge arcs. Continue to lower your velocity while shooting and you will notice the arcs get smaller and smaller. When you get to the velocity where the arcs go away and the accuracy is at its best you will have found the sweet spot. Finally, recheck your velocity with the chrono to be safe. Your velocity should now be around 260-280. Paint changes size due to temperature and humidity so be sure and do this several times during the day so ensure you get the most out of your Hammerhead barrel system.
Paint size and performance:
The bore size of a Hammerhead is .687 across the lands and .694 across the grooves. The closer your paint is to .687 to .693 the better results you will have. This is because the ball is able to engage the rifling much better when the paint is closer to the size of the barrel. Smaller paint will still perform well but paint that matches the barrel bore is preferred.
Choosing the correct Hammerhead Fin (ball sizer):
When sizing your paint it is best to measure more than one ball. Paint size varies even in the same bag of paint. The best paint-to-bore match allows the ball to slide through the ball sizer with a little bit of resistance from your pinky-finger or enough to blow the ball through the ball sizer. A good rule of thumb for sizing your barrel is a little looser is better than too tight. You should be able to push the ball through the ball sizer with your pinky finger with some resistance. The ball should not fall through nor should you have to force the ball through. Also, remember to close up your paint from bag to bag. Moisture and temperature will cause the water vapor in the air to be absorbed by the balls resulting in ball swell. We suggest monitoring your paint size with a ball gauge several times a day when playing to confirm bore and paint match.