That's them...I've got an identical set...

When I head space (factory Savage Barrel) it according to how its supposed to be done, closed/locked on Go-Green, tight and not closing (bolt handle starts to rotate but does not go further than a 1/2" or so towards closed on NO-GO Red...sounds like its head spaced right...then the new cartridge acts as if it were a NO GO gauge...any tips?

Capt Beach