Headspacing gauges needed?

Ray B

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I took the Mark X action and a barrel chambered for 300 Wby to the gunsmith to be seated. The gunsmith is just starting out and doesn't have a lot of equipment. He said he didn't have go/no go gauges for the 300 Wby yet so would need to either rent/buy a set in order to install the barrel.

I have read that what's needed to install virtually any of the belted magnums are the same gauge- headspacing on the belt. Is this correct that he can use a set of "belt" gauges rather than full cartridge ones?
 

bruce moulds

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yes they headspace on the belt.
same as 375 & 300 h&h, 300 win, 7mmrem, etc.
when you reload the brass you should then adjust the fls die to use the shoulder for headspace.
bruce.
 

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