
Paintball Bore Sizing: How to Match Your Barrel to Your Paint
What is paintball bore sizing? Bore sizing is the process of matching your barrel’s inner diameter to the outer diameter of your paintballs. A properly matched bore improves accuracy, reduces barrel breaks, and increases air efficiency. Most paintballs measure between .679 and .695 inches, and barrel bores are manufactured within that same range to allow precise matching. Bore Size Best Paint Match Common Use .679 – .682 Small or winter paint Cold weather, brittle paint .684 – .687 Mid-range tournament paint Most common match for quality paint .689 – .691 Standard recreational paint Field-grade, rental setups .693 – .695 Large or summer paint Hot weather, swollen paint Why Bore-to-Paint Match Matters Three things change when you match your bore to your paint: accuracy, efficiency, and reliability. ...








