FORSTER SAAMI RIMLESS HEADSPACE GAUGES The Forster Headspace Gauges are precision instruments designed to help gunsmiths and firearm enthusiasts accurately measure the headspace of rifle chambers, ensuring firearms operate safely and reliably. Proper headspace is critical for preventing malfunctions such as misfires, case ruptures, or excessive wear, which can compromise both performance and safety. These gauges are indispensable when chambering new barrels, performing routine maintenance, or evaluating used firearms for purchase. Key Features: Precision Engineering: Machined to exacting SAAMI specifications, these gauges provide accurate measurements Mfg: Forster Products, Inc. SPECS: Machined Steel. Size varies with caliber and gauge style. NOTE: Gauges Interchangeable between calibers have same Stock #. .30-30 Cartridges are .219 Wasp, .219 Zipper, .22 Sav HP, .30-30, .32 Win Spl, .32-40, .375 Win and .38-55. .30-06 Cartridges are .25-06, .270 Win, .30-06, 8mm-06