Headspace gauge options for a 6.5x47 L ?

[FN in MT]

In the past sizing for my bolt guns I'd adjust the die so that I needed just a small amount of pressure to close the bolt on the sized case.

NOW I'm doing this Lapua build and wonder if I should try to be far more accurate and try a head space gauge of some sort?

Sinclair has "bump gauge" inserts and a tool to hold the inserts. None available...back ordered for months now.



Hornady makes a similar set; the "Lok-N-Load headspace tool kit". Like the Sinclair an attachment for a set of calipers, and various inserts that match the cartridges shoulder angle.

Looking at the chamber spec's the 6.5x47 L shows a 30 degree shoulder angle. So I assume ANY insert that matches 30 degrees would work??



Any other suggestions?

FN in MT

 

[FN in MT]

Datum Dial Ammo Measurement System | Ammunition Measurement System |

Another option?

 

[FLIGHT762]

According to Lapua's cartridge drawing, the datum line is 3.77" (9.58MM) on the 6.5X47 L . The Hornady .375" insert should work. Forster lists the 6.5X47 Lapua using the .375" insert on their new gauge. You can see it here: http://www.forsterproducts.com/client_images/catalog19938/pages/files/Datum_Dial_Instructions.pdf

I've been using the Sinclair and the Hornady (Stoney Point) shoulder bump measurement gauges for a few years. After using both, I'm partial to the Hornady set. I've gotten more consistent measurement readings with the Hornady set.

 

[.308mk4]

Looks like the datum circumference is .3771. Whichever bushing that is. I believe it's the same as for the .308 family.

 

[FLIGHT762]

Looks like the datum circumference is .3771. Whichever bushing that is. I believe it's the same as for the .308 family.

It is not the same as the .308 Win. family. The .308 family is .400". the .375" family is the 30/06 based cartridges.

 

[FN in MT]

Flt762,

Thanks for the guidance. I appreciate your taking the time to reply.

Hopefully the Hornady kit will be in stock.

And...I learned what "Datum Circumferance" refers to today.

 

[.308mk4]

Oops. I wasn't sure. I've probably been using the wrong one. Oh well. I measured my go gauge and went from there.