Forster Head Space Gauges are made with painstaking care to insure you accurate testing of the chamber. Each caliber Gauge comes in "GO", "NO GO", and "FIELD". If an action will not accept a "GO" Gauge, it will not accept cartridge cases of maximum length. If it accepts a "NO GO" Gauge the action may have excessive head space. If the action accepts a "FIELD" Gauge, it should not be fired. Every firearms owner should have Forster Head Space Gauges for safety and accuracy.
Specify "GO", "NO GO" or "FIELD" length gauge when ordering.