Forster Products 300 Winchester Magnum NO-GO Rimmed and Belted Headspace Gage
- NO-GO: Corresponds to the maximum recommended headspace for chambering new bolt-action rifles.
- If a rifle closes on a NO-GO gage, it may be within SAAMI specs, or it may have excessive headspace.
- Use to check all standard belted Mags with .535″ O.D.: 257 Wby., 257 STW, 264 Win., 6.5 STW.
- 6.5 Rem. Mag, 270 Wby., 275 H&H, 7mm Rem. Mag, 7mm Wby Mag, 300 H&H, 300 Wby., 300 Win. Mag,.
- 30-338 Win. Mag, 308 Norma Mag, 338 Win. Mag, 8mm Rem. Mag, 340 Wby., 350 Rem. Mag, 358 STA, 375 H&H, 416 Rem., & 458 Win. Mag..