6BR Norma Base to Datum Measure

[AR-180]

Does anyone know the length for a minimum SAAMI headspace?

Thank you.

 

[Dolomite]

Check this post for reamer prints. Should have the info you are looking for. But not all datum line measurements will be the same.

Gunsmithing - 6BR Reamers

I'm thinking about building a 6BR for my next comp gun. Question I have is what reamer is recommended? Plan on shooting 105-108's gr bullets. I found these three prints. Two are JGS and one is PTG. Any advice is appreciated.

www.snipershide.com

 

[RegionRat]

You won't find the 6 BR standard in SAAMI because it is in CIP.

 

[Top O' Texas]

If you're asking about 6RemBR then it's 350 for datum and best calculation is 1.1555-1.1565"? My datum chart shows 350, but calculated at 365. Datums are the same as 22br, 22-250rem, 6ppc and 6dash. If datum is 350, then it adds .0815" to 1.075". Geometry isn't my thing!