What's going on with my .338WM trajectory?
I loaded up some 250gn Hornady BTHP match projectiles and chronographed them at 2652 fps.
Checked my zero at 100 yards was spot on, then worked out a drop at 1000 yards of 30.75 MOA and at 605 yards of 13.75 MOA.
Temp 19C pressure 1000mb.
Rifle is a Tikka T3 Laminate with a Clearidge 2.5-12.5x42 Ultra XP5 on 20MOA rail. It is quite an accurate rifle for a light weight hunting rifle.
Now at 1000 yards the group was 44cm high and at 605 yards the group was 30cm high. I have played about with the inputs into my ballistic program but can not get thing to line up like they should. I am thinking as the height error seems to be linear from 605 to 1000, that maybe my scope turret adjustments are not quite MOA?????
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