Enfield rifles were proof tested with two oiled proof cartridges, this seated the bolt lugs and bolt head to the bolt body. If the headspace increased over .003 the rifle failed proof testing.
No.1 Enfield bolt heads were measured and then fitted using a bolt head spanner wrench to work in and seat the bolt head to the bolt body. Bolt head timing was used when the rear of the bolt head was to contact the collar on the firing pin. Meaning the bolt head was to contact the firing pin collar and push the firing pin to the rear the last 90 degrees of bolt head rotation.
Bolt heads marked with the letter "S" for spare were the longest and were to be used on worn rifles where new or used bolt heads failed to meet headspace requirements.
When a new bolt and a "S" marked bolt head failed to bring the rifle into headspace requirements the rifle was sent for FTR/Overhaul. When this happened normally the surface hardening of the receiver was scraped and the rifle parted out.
Before you do anymore stoning on the bolt lugs I would contact Peter Laidler. Your rifle is a bitser and made up of leftover parts put together by untrained New Yorkers and the very reason you are messing with your bolt lugs. These rifles were never proof tested and the bolt lugs and bolt head were never seated properly as they would be during proofing.
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