Precision headspace gage for .22 rimfire chambers. GO gage ensures your rifle safely accepts standard ammunition. Essential gunsmithing tool for accurate chamber testing and safety verification.
Headspace—the distance between the breech face and the cartridge base when the action closes—is critical to both safety and accuracy. Excessive headspace can cause unsupported brass to rupture, allowing dangerous gas blowback. Proper headspace verification is non-negotiable.
Forster manufactures these precision instruments with exacting standards to ensure reliable chamber testing. Every gage is crafted with the care your safety demands.
GO Gage Function: If your rifle closes on this GO gage, your chamber will safely accept any ammunition manufactured to S.A.A.M.I. (Sporting Arms and Ammunition Manufacturers' Institute) industry standard specifications.
Professional gunsmiths typically use three gages:
Most properly chambered rifles close on the GO gage but not the NO GO gage, placing headspace safely within specification.
Whether you're a gunsmith, reloader, or serious shooter, Forster headspace gages provide the precision measurement you need to ensure your rifle operates safely and accurately.