Have 13 cartridge head space guages for rifles. These guages measure the length from the base of the cartridge to the shoulder, as well as the maximum case length. This process will show if your rifle ammo is being produced to industry specifications. They mostly Forster guages with a few Wilsons in the following calibers: .222 Remington mag, 7mm mauser, 308, 30-06, 270, 280 Rem, 300 Savage, 243 Win, 257 Robt, 244 Rem/6mm, 338 Win mag, 222 Rem, and 22-50. Will sell individually for $12 each or make me an offer on the lot. All are in excellent condition.