Winchester · Magnum

Winchester Match 338 Lapua Magnum 285 gr

0.756BC (G1)

285.0gr18.47 g

820m/s2690 fps

6207J4578 ft·lb

Manufacturer	Winchester
Calibre	8.59 mm (.338")
Bullet weight	285.0 gr · 18.47 g
Ballistic coefficient G1	0.756
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	819.9 m/s · 2690 fps
Muzzle energy	6207 J · 4578 ft·lb
Sectional density	0.356
Form factor	i1 0.471
Category	Magnum
Source	Winchester website 2026-07-02 (verified)

Reading these numbers

Only a G1 ballistic coefficient is published for this load, so BallisticApp solves it against the G1 drag table. G1 BC drifts with velocity — the figure below is valid near the muzzle and drops off as the bullet slows.

Muzzle energy of 6207 J (4578 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.356 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 G1 BC of 0.756 is higher than 29 of them.

Similar 8.59 mm (.338") loads

338 Lapua 285 gr ELD® Match285 gr · BC 0.394 · 837 m/s Winchester Rifle 338 Lapua Magnum 285 gr285 gr · BC 0.756 · 820 m/s Berger Hybrid OTM 300gr .338 LM300 gr · BC 0.419 · 820 m/s 338 Lapua Magnum 270 gr ELD‑X® Precision Hunter®270 gr · BC 0.381 · 853 m/s The .338 Lapua Mag. with the 19.4 g (300 gr) Armor Piercing AP529 bullet300 gr · BC 0.366 · 830 m/s The .338 Lapua Magnum loaded with the 19.4 g (300 gr) Scenar OTM bullet300 gr · BC 0.368 · 820 m/s

Turn this into a drop table for your rifle.

These figures are the bullet's starting point. What you actually dial depends on your rifle's zero, the air you're shooting in and the wind on the day — BallisticApp solves that on the phone, offline, using the same G1/G7 tables and this database.

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