Mass produced actions, such as the popular Remington 700, can be good actions on which to build a higher quality precision rifle. However, a problem with most mass produced actions is that their surfaces and threads are often less than perfect. To build the highest quality rifle possibe these surfaces should be “trued” and measured to verify tolerances, which is also referred to as “blue printing”.
The surfaces we true includes the bolt face, bolt lugs, receiver face, receiver threads, receiver lug seats and then we finally lap the bolt lugs. Most of the process is performed on a lathe (single-point) for best results.
The end result is all these surfaces being within .0002 of an inch. This provides the best possible receiver on which to build your rifle.