The .338 Lapua Mag. loaded with the 16.1 g (248 gr) armor piercing AP485 bullet

Reading these numbers

Both a G1 and a G7 ballistic coefficient are published for this bullet. BallisticApp defaults to G7, because the G7 standard projectile is shaped like a modern boat-tail bullet and holds its coefficient far more steadily across the transonic range than G1 does.

Muzzle energy of 6436 J (4747 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.310 describes weight per unit of frontal area; divided by the ballistic coefficient it gives the form factor, which is how much drag the shape adds over the standard projectile.

Among the 31 loads of this bore diameter in the database, this one's G7 BC of 0.289 is higher than 1 of them.

Similar 8.59 mm (.338") loads