quiethunter, Iwent to the range today, but left my chrony at home. I will be sure to take it next time. On a good note, I tried 168MK's with N550/Fed210M's, and it seemed to love them, .0015 off the lands. I think I found the sweet spot in it. One hole groups all day long. I htink 190's are a bit heavy for it, not that they don't shoot GOOD, but the 168's seem more consistant.