Cylinder boring question

Sorry if this question is "boring" to you, but I just picked up a standard bore 340, that has a grove in one cyl from snap lock on the wrist pin coming loose. I stuck a feeler gauge to it and it seems about .030" deep in the wall. Now, to clear that up, would I need to take it .060" over or will a .030" bore clean it? My thought process is that, when a cylinder is bored that it is the overall circumference of the cylinder, not the debth of the cut. Right or wrong?
Thanks!