This is a continuation of the discussion from Long Range Hunting. Jon A, Yes all data was corrected for the ambient conditions. My guess and I repeat guess is the TSX (I have never shot them but I have never seen Barnes list a BC off by more than 0.030) will have a BC around .45 (G1). I ran a quick comparison and if the TSX is started at 3150fps and the Scirocco is started at 3100 (both easily obtainable in the 7mm Rem Mag) the difference in wind drift at 600yds is less than 3”. In my opinion this is not a very significant advantage. G1 Drag Model 150 Scirocco BC 0.510 140 TSX BC .450 (educated guess) 7000 ft 30 deg Temp With either bullet you have to correctly estimate the wind speed. Oldguns, How deep did the bullet penatrate?