Forster Headspace Gage FOR 22 RIMFIRE GO

The Forster Headspace Gage FOR 22 RIMFIRE GO is the precision measurement instrument every serious rimfire reloader and gunsmith needs to verify chamber dimensions. Proper headspace measurement is the foundation of safe ammunition and accurate rifles—excessive headspace creates dangerous conditions where unsupported brass can rupture under firing pressure, potentially directing gas rearward with catastrophic force. This go-gauge allows shooters and gunsmiths to confirm that a .22 rimfire chamber is within safe manufacturing tolerances.

Forster Products manufactures headspace gauges to exacting standards, and the .22 rimfire version fits the unique requirements of that cartridge family. The compact design—measuring 3.5 inches in length and just 0.75 inches in diameter—makes it practical for bench work and field inspections. At only 0.03 pounds, it integrates easily into a reloader's tool kit. Headspace gauges function as direct measurement devices: a properly sized go-gauge should fit snugly into a chamber, confirming the breech face-to-datum distance is within specification. Chamber rejection of an oversized go-gauge signals dangerous headspace conditions requiring action before firing live ammunition.

This gauge is essential for shooters who chamber .22 rimfire barrels, reload .22 ammunition, or maintain rimfire firearms. Reloaders benefit from confirming that resized brass will chamber properly and safely. Barrel smiths use headspace gauges during installation and fitting to ensure the chamber meets SAAMI specifications. Precision shooters who handload or inspect fired brass understand that headspace directly impacts accuracy and safety—excess clearance allows cartridge movement during ignition, degrading shot consistency and creating pressure anomalies. The Forster headspace gage for .22 rimfire provides objective verification that eliminates guesswork from this critical measurement.