Ok was trying to zero in my fathers .243 win this evening and wasn't having much luck. He is shooting 95gr FUSION bullets and has a tasco proghorn 4x scope on. Took 5 shots to get on box at 25yrds, I got it shooting about 2.5in low at 50, so went out to 100yrds and 1st was 3in left. I adjusted the scope and 2nd shot was dead on left and right, but dropped about 6in, 3rd shot at 100yrds went 1.5in left and about 3in low. We only had one more shell so I fired it at 50 yrds and was only about .5in low. What is going on with this thing?