You're still just eyeballing it with that device. A real level like Innovative Technologies and a verified vertical line down range is fool proof.
Two weeks ago I mounted up a 16x Super chicken on a .300 WM, using Hi-vels device. I was shooting 210 Bergers. I had only put it on paper at 100 yards.
I went to a private ranch on a particulary windy day with a couple of guys who are PRS shooters, and the first target engaged was at 1K.
Using my Kestrel (applied ballistics) for validation of velocity, and a wind correction, I was able to achieve a 2nd round hit on a USPSA sized plate.
The rest of the shots matched the wind calls. That is pretty darn accurate to me.
THE CHAIR IS AGAINST THE WALL.
The Tikka T3 in .308 Winchester is the Glock 19 of the rifle world.
