30-06 SPRINGFIELD: Use to check headspace of 25-06, 6.5-06, 270 Win., 30-06, 8mm-06, 338-06, & 35 Whelen.
RIMLESS CARTRIDGE HEADSPACE: The proper use of Headspace Gages is the most reliable way to test rifle chamber length. Headspace in a rimless cartridge is the distance between the bolt face and a datum line, determined by SAAMI, where the front of the cartridge rests on its shoulder when the bolt is closed.
GO: Corresponds to the minimum chamber dimensions. If a rifle closes on a GO gage, the chamber will accept ammunition that is made to SAAMI maximum specifications. The GO gage is essential for checking a newly-reamed chamber in order to ensure a tight, accurate, and safe chamber that will accept SAAMI maximum ammo.
NO-GO: Corresponds to the maximum headspace we recommend for gunsmiths' chambering new bolt-action rifles. This is not a SAAMI-maximum measurement. If a rifle closes on a NO-GO Gauge, it may still be within SAAMI specifications, or it may have excessive headspace. To determine if there is excessive headspace, the chamber should then be checked with a FIELD Gauge. The NO-GO Gauge is a valuable tool for gunsmiths' reaming new chambers, in order to ensure tight and accurate headspace
MEASURING MEANINGFUL HEADSPACE: Properly speaking, and for safety purposes, one measures “headspace” as the difference between the length of a standard cartridge, as represented by a Gauge, and the gun's actual chamber length , when the head of the cartridge is flush against the bolt face.
Forster Products 223 Remington GO and NO-GO Headspace Gage Set
KWD 39.500
Forster Products 30 Carbine GO, NO-GO, & Field Headspace Gauge Set, SAAMI Dimensioned, Rimless, Hardened Steel, Precision Ground
KWD 59
Forster Products Full Length Bench Rest Sizing Die, Size Shoulder to Set Headspace, Deprime, & Expand Case Neck, with E-Z Out Expander Ball
KWD 30
Forster Headspace No-Go Gauge 6.5 PRC
KWD 17
