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paintballimpact.com / Barrels / Bore Size
Bore Size
The bore size of a paintball gun is the length in inches of the diameter of the interior of the barrel. Usually, the bore size of a paintball barrel is .68 of an inch. This diameter usually matches up perfectly with .68 caliber paintball. If the barrel and the paintball is a perfect fit, then the paintball should fly straight out of the barrel and rarely break inside of the marker. Some high functioning barrels include the Phat Performance Barrels System from the ACI, the Smart Barrel from Aardvark, and the Compression Barrel from End Game Inc.. The End Game Inc. Compression Barrel is available in a number of different colors, including white, silver, blue, green, and black. The Compression Barrel that has dual rifling grained rifling, on the inside as well as triple posted rifling on the outside.
The bore size is almost always approximately .68, or 68 hundredths of an inch. While this bore size is usually pretty universal, the exact size of the barrel may actually vary slightly. Some barrel diameters may actually be .682, .679, .681 etc. While this is really a slight variation, it can actually affect the performance of your overall system, depending on the specific brand of paintball you are using. While the bore size of a marker may vary slightly, the diameter of paintball's. These slight variations may cause the paintball to be slightly too big or too small for your marker and barrel. The result? If the paintball is too small it might not fly straight out of your marker, and if the paint ball is too big, it might burst in the marker or not fly straight. Some excellent paintballs sold online and at Proshops include Motion Paintballs from Thrust Paintball, Competition paintballs from Tomahawk, and Heavy Metal Paintballs from Viewloader. Viewloader Heavy Metal Paintball fly true when matched up with the right size barrel and almost never break inside a players marker. Player testing has come back with positive reviews concerning the condition of the paintballs out of the box, and the thickness of the paint fill that is left on opponents.
How do you know if the bore size of your barrel matches up perfectly with the paintballs you have? The only sure way to have the right fit is to test the products yourself. Grab a couple of paintballs and put a few of them in your hand. Next unscrew the barrel from the paint gun and hold it in your other hand. Place a paintball in the barrel and try to blow it out the other side with your mouth. If the barrel travels out easily without too much huffing and puffing, then you have a good fit. If you really have to strain yourself to blow the paintball through the barrel, then you need a smaller paintball, or a barrel with a bigger bore size. If you place the paintball in the barrel and it falls through the barrel on its own, then it is too small for the barrel.
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