This past year I had Kirby re-barrel and accurize my 300WM Weatherby Vanguard. He did a good job of getting it back to me in time to get loads developed and set-up. However, due to another delay out of both our hands, I just got the rifle in my hands last week. I spent a whole day at the range breaking it in per Dan Lilja's instructions. I finally had a load that looked OK, not as good as I expected, but acceptable due to time constraints. Tonight I went to the range with 15 rounds for the sole purpose of zeroing the rifle. We leave for Wyoming Monday the 6th. After a 5 shot 5 inch group at 200 yards, I was extremely frustrated. The same load had just shot a 5/8" group at 100 yards....... Knowing the loads were fine and the quality of Kirby's work, the only other variable was the brand new Nikon 5-20 Monarch I had put on. With only 4 rounds left and loosing daylight, we pulled the 2.5-10 off my Dad's AR, bore sighted, thenn fired one shot at 100 yards. It was close so I made a quick adjustment, then moved to 200 yards. I then shot my last three rounds, all touching at 200 yards! Not very pleased with Nikon right now but extremely pleased with Kirby! I have a VXIII 4.5-14 x 40 sitting on the shelf that I'll put on and zero tomorrow. Guess I'll have to ship this boat anchor back to Nikon. To be fair, between my Dad and I we have a dozen Monarchs and this is the first issue. As usual, at the worst possible moment. Kirby, thanks for a great job!