So the xtr 3 is built on the same 7x erector that the m7xi is from my reading, however they are only using 5x of it. This new 2.9-20 looks to be a version of the same 3.3-18x50 but utilizes all 7x. Hopefully it executed it better than the new nx8. I love the physical functionality of my 4-32x50 however optically I feel it doesn't deliver as I was hoping, anything much above 24x is dark and the eyebox becomes quite sensitive and parallax needs constant attention, DOF is poor. I really hope the xtr3 3.3-18 I ordered yesterday makes up for these and I can sell the NF. I do like the milC reticle a lot for a hunting rifle as that's what all my rifles do mainly. The scope will be atop an 8# 300 norma improved, so it will definitely get a recoil test, hopefully it holds zero with no shift under recoil. A lot of high end scopes fail at this. Khales, NF, Swaro X5, March have been tested by my smith to have no reticle movement under this rifles recoil, several other manufactures high ends have failed his test. Hoping for the best here........