Re: Newbe confused
A couple weeks ago I had about the same problem. At 975yrds, I was hitting about 3moa low , with my 260 rem/6.5-20x44 Viper pa, shooting 140vld at 2800fps. After shooting through the chrony again, I realized my speed was only 2705fps. The last time I chrono'ed it was last summer, and I'm thinking that there must have been a big temperature differance, because I didn't log the temp. back when I came up with the 2800fps. I was also wondering if the click value on the scope was accurate. If I find the click value is not exactly what is claimed, I guess I will adjust the velocity on the drop chart to match my POI at 200ydrs and 1000yrds, and then verify inbetween. I'd check 200yrd zero and rechrono.
Hope this helps.