Hi Gents My Smith has 30-06 Ackley go and no go gauges from PTG. He intends to build me a 25-06 Ackley and has said he can use the 30-06 Ackley gauges to do this as the two cartrdges share identical headspace dimensions. Is this correct as i note that PTG list seperate part numbers for the 2 cartridges? Thank you. BRIT.