Forster Headspace Gage .303 British GO
Precision headspace gage for .303 British rifles. Essential gunsmithing tool for accurate chamber testing and safety verification. Forster manufacturing quality ensures reliable measurements.
Understanding Headspace and Chamber Safety
Headspace—the distance between the breech face and the cartridge base when the action closes—is critical to both rifle safety and accuracy. Excessive headspace can allow unsupported brass to rupture during firing, creating a dangerous rearward gas escape.
Why Headspace Gages Matter
Every serious gunsmith and reloader understands that proper headspace verification is the most reliable method for testing rifle chamber dimensions. A rifle's chamber must be precisely sized to function safely with standard ammunition while maintaining the accuracy your shooting demands.
How the Forster GO Gage Works
If your rifle closes on this GO gage, your chamber will safely accept any ammunition manufactured to S.A.A.M.I. (industry standard) specifications. This is your baseline for safe operation.
The Complete Picture
Most gunsmiths establish headspace by measuring between GO and NO GO dimensions:
- GO gage: Rifle should close on this gage
- NO GO gage: Rifle should NOT close on this gage (indicates potential excessive headspace)
- FIELD gage: If rifle closes on this, chamber is dangerously oversized
Forster Quality
Forster Headspace Gages are manufactured with exacting precision and uncompromising standards. Your safety depends on accurate measurement, which is why Forster's painstaking attention to detail matters.
