If you stop to think of it,
.010 oversize in reality is .005 on a side.
You usually leave after boring, about .002-.003 for honing.
If a bore is worn a little or just minor scoring, it is just easier to forget about the boring,and associated set up time, and just hone it to finished size.
Now if the bore is egg shaped or tapered excessivly, or a person wants to go .060 oversize,then it must be bored to true it up and or remove the larger amount of material.
Remember a human hair is maybe .002 to put it all in prespective.
