Bolt fitting on a No1 mk111

[jmoore]

Here's why you don't want to "lap it in"!:

From Captain Laidler's post- "The rifle body is induction hardened at these points to a depth of .004 - .006" but we have found it deeper."

Given that the body already has some wear, most likely, there's not much metal removal that you can do w/o removing the hardened "skin".