When I first bought the 3x9 Prostaff I really liked the optics. I could and still can make out bullet holes with it set on 6x at 100 yards. I bought this scope 3 years ago and it's first job was an Elk hunt in Wyoming. I sighted it in no problems and got really fine accuracy from my 270. I fly to Wyoming and check my sight in. The bullets are hitting 6 inches high. Baggage handlers I think. I click it down into position but have several fliers out to between 1 and 2 oclock and one at 6. HMMMM. We go elk hunting and I get one but not as neatly as I would have liked. I get back to Texas and check my sight in before my deer hunting starts. An almost exact rerun of my sight in check after the flight to Wyoming. I pull the scope off and put on a Leupold 4x for deer season and ship the Nikon off to Nikon. I got it back several weeks later and didn't put it back on a rifle till May of this year. The rifle is a worked over 7MM RM, an extremely accurate rifle. I did some load workup using 160 and 175 grain bullets with no problems and sighted the rifle in. No real problems. I decide to use 140 grain Partitions so back to the range. Same exact pattern and the scope won"t repeat. So back to Nikon it goes. I don't have an extra Leupold so I am putting a new Bushnell Banner 3x9 on it. The history of this scope is not good.