There's a lot of variables that could be contributing. Number one by a wide margin would be the adjustments of the scope. Back when I did use Leupolds the values were all over the place. In order to get anywhere I'd map each one on paper at 100 yards, it wasn't uncommon to see click value off by 30% vs what the turret claimed, though others were pretty close. Number two would be the BC of the bullet, some of the LRAB's have been pretty wildly off, though I don't know about that individual one and my latest Litz book is packed away right now.
