Headspace Question

[tammons]

What is the max allowable headspace of brass cartridge and bolt.

I am thinking ideal is .004 and a Field gage is .012 but cant rememeber. IE like max serviceable would be around 0.010

I have a rifle that I think has too much headspace, not a savage.

[earl39]

What cartridge? Not sure but I think it can be different depending on cartridge.

[tammons]

9.3x62

[BillPa]

9.3x62

Its CIP cartridge,but maybe you can make some sense out of this gibberish :p.....
http://www.cip-bobp.org/homologation/uploads/tdcc/tab-i/tabical-en-page69.pdf

..or you can just rent the gauges and make your life easy! .http://www.4-dproducts.com/displayitem.php?rowid=226&tname=rental

Bill

[tammons]

Jeez been crunching numbers all day on a job and one look at that sheet gives me a headache.
From what I can tell with a new cartridge its got .008" headspace or about .004 too long.
Closes on a no go gauge.

Know I can just neck up and back down create a false shoulder and reload then on 1x brass set my dies to the headspace, but would rather get the headspace right which means barrel work.

[joeb33050]

It's in the L! and L2 dimensions. Max ctg and min chamber difference = L1 .04 mm ~.0016", L2 .5 mm ~.002;but see -.020 on ctg, then diff = L1 .024 mm ~.009" and L2 diff = .025 mm .010"
The answer is that with chamber and ctg to spec, the distance from case head to bolt face is .0016" to .010".

[tammons]

So at .008 it should be useable but not ideal.

I did some research on the internet and this is a mauser action.
Found some data for the 8x57. Never could find this exact info on the 9.3x62 for the 3 gages.

8x57 headspace gages
1.874 - GO
1.880 - NO-GO
1.884 - FIELD

Which says the field gage is .010 for the 8x57.

[joeb33050]

What ever you're planning, you need to measure headspace or head clearance in your rifle if you suspect it is too great = out of spec. Renting headspace gauges is the easy way to find out.