So, he needs a table for his rifle and his load so he can snipe ISIS.
Muzzle velocity: 870 meters per second
Scope height over bore = 7cm
(1click = 1cm@100m)
32 degrees zero temp
40% air humidity
(No barometric pressure so I will skip zero atmosphere)
Rifle is the Osiris T5000 chambered in .338 Lapua Magnum
Barrel lenght: 660 mm (26.0 in)
Rifling is 1-11
Bullet is the Lapua Scenar 250gr
G1 BC: 0.648, G7 BC = 0.322
Now to put this in a magic pot, stirr, and make a table out of it.
So, what we can see here is that the bullet will be subsonic after ~1300 meters.
That makes it unstable and probably will not hit anything.
Btw, the windage value is for 1 meters per second wind full value.
Good luck 👍😎