A while back, I brought two rifles to our 600 yard benchrest match. One had a 12-42 nxs, one had a 10-50 SIII. Resolving 6mm bullet holes at 600 yards on a cloudy day is a pretty good test. Its just a sample of 2 scopes, but the SIII was just BARELY behind the NXS. And I bought these two when the SIII 10-50 was $700 new and the NXS was $1500 USED!