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.