What is paintball barrel bore size?

When picking a paintball barrel, the most important thing to look at is the first barrel thread to ensure you have the correct barrel for your gun. After that, you should consider the bore size, which refers to the inside diameter of the barrel.

The first thing most people think is that paintballs are all the same size (.689 caliber), and while this is generally true, paintballs can vary in size. The size of paintballs can be affected by factors such as the manufacturer, quality, and climate. Although the size difference is usually slight, for example, currently in mid-2020, .685 is the most common paintball size.

Choosing the correct bore size that fits your paintballs will greatly improve accuracy. However, it is even more important to use high-quality paintballs for the best accuracy.

The best way to determine the correct bore size is to size match your paintballs to the barrel you are using. This is done by placing the paintball in the barrel. If the ball rolls out, the barrel is too big, and if it gets stuck and you have to push it out, the barrel is too small. Ideally, you want the ball to get stuck but be able to lightly blow it out with your breath.

If you plan to get only one barrel, we would recommend something that is .684 or .685. Alternatively, a GoG Freak Barrel Kit would be even better. The complete Freak Kit comes with eight different bore sizes to help you achieve the perfect fit every time.

Exalt Paintball Barrel Maid...

  • Wont unravel and easy to wash
  • Disk seal retracts during insertion to prevent paint going up your barrel
  • Built to last, this beast of swab is forged out of tough and flexible plastic
  • 100% interchangeable and 100% replaceable

Barrel Questions & Help

Exalt Paintball Barrel Maid...
  • Barrel Buffer – Won’t unravel, easy to wash, cleans like a champ
  • Rocket Disk – Something you’ve never seen before. All-weather seal retracts during insertion to prevent paint going up your barrel, then expands as you pull back to remove everything in it’s way
  • Molded Shaft – Not built on a twig, this beast of squeegee is forged out of tough & flexible plastic.
  • All pieces are 100% interchangeable and 100% replaceable