Creedmoor headspace question...

**Bigt240** · 01-03-2018, 11:31 PM

Anyone ever hear of using 308 go/no go gauges to headspace a 6.5 or 6 creedmoor? Was talking to a guy on another site and he has some savage rfiles in 6 creedmor for sale. I asked about who headspaced them and he said he used 308 gauges which seems way off to me. Did a few google searches and didn't come up with anything. Am I missing something?

**RustyShackle** · 01-03-2018, 11:47 PM

My understanding is that they are different! I’m going to guess about 0.08 difference off the top of my head.

**Cmgoff** · 01-03-2018, 11:48 PM

No, 308 has a 20 degree shoulder and creedmoor has a 30 degree. Also headspace length is longer for the 308.

Originally Posted by Bigt240

Anyone ever hear of using 308 go/no go gauges to headspace a 6.5 or 6 creedmoor? Was talking to a guy on another site and he has some savage rfiles in 6 creedmor for sale. I asked about who headspaced them and he said he used 308 gauges which seems way off to me. Did a few google searches and didn't come up with anything. Am I missing something?

No, 308 has a 20 degree shoulder and creedmoor has a 30 degree. Also headspace length is longer for the 308.

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**Bigt240** · 01-03-2018, 11:50 PM

That's what I thought to. Ugh the guy is selling a pair of them. Thanks guys.

**Zero333** · 01-04-2018, 08:48 PM

Maybe he was confused and he was talking about a 260rem and not a 6.5CM

243 win/ 260 rem / 7-08 rem / 308 win / 338 fed / 358 win, all use the 243/308 win go-no-go gauges.