I've found a bore-scope most useful for testing cleaning products.

There are a few other good uses, such as making sure the bore is REALLY clean when in stalling Dyna-Tek Bore Coat, or using fire-lapping to smooth a worn throat.

But as far as being able to tell whether an individual bore will shoot more accurately, or even foul more than another--nope!

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck