I had IT&D re-barrel a 308 700 Rem. Sent the bolt AFTER this work to AK to have a new bolt handle welded on. USPS lost the bolt on return to me. I bought a new bolt, had the handle welded again then sent the rifle back to IT&D to check headspace. Maybe I was lucky, but headspace was fine. Seems the bolt specs are pretty close on mass produced rifles.
Do as Jordan says or find someone with a headspace guage. I'd prefer the guage route.
