I have been trying my hand at some ELR shooting and am running into some issues with how far I'm shooting. I am shooting a 260AI with a 30" barrel running 140 hybrids at 2902 with a SD of 7 ( magneto speed). I have a kestrel 4000 and the AB ballistics app for my phone. my target is a steel plate 42" x 18.5. I have used google earth to range my target ( shooting mtn. to mtn) at 1780 yards. Ive used two scopes ( one mil, one moa) to range it and keep coming closer to 1900 yrds. My shooting elevation is is roughly 2200 ft. and target is at 1900 ft. My AB tells me my dope for 1780 should be up 54.2 moa. I have a set of Barret 15/40 ex rings with a NF 8x32 moar t. I have 61 moa available from my 100yrd zero. I move my rings to the 40 moa position ( adding 25 moa) to try to be in the center of the scope, then dial in the rest. My problem is I'm having to dial in 55 moa plus hold 10 moa in the reticule to hit the target( I've had one hit and recovered several bullets within a few feet of the target). by my math this is 25(rings) +55(turret)+10(reticule)= 90 moa. I don't get it, the dope with the atmospherics for 2000 yrds is only 69.3 moa. Any idea's on where to look for a problem.