Norma · Magnum

Norma Whitetail 300 Win. Mag 11.7g

0.257BC (G1)

180.0gr11.66 g

890m/s2920 fps

4619J3407 ft·lb

Manufacturer	Norma
Calibre	7.82 mm (.308")
Bullet weight	180.0 gr · 11.66 g
Ballistic coefficient G1	0.257
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	890.0 m/s · 2920 fps
Muzzle energy	4619 J · 3407 ft·lb
Sectional density	0.271
Form factor	i1 1.056
Category	Magnum
Source	Norma 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 4619 J (3407 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.271 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 488 loads of this bore diameter in the database, this one's G1 BC of 0.257 is higher than 114 of them.

Similar 7.82 mm (.308") loads

Fusion Rifle, 308 Win, 180 Grain, Fusion Soft Point, 2600 fps180 gr · BC 0.503 · 793 m/s Fusion Tipped Rifle, 308 Win, 180 Grain, Fusion Tipped, 2600 fps180 gr · BC 0.501 · 793 m/s Nosler Partition, 308 Win, 180 Grain, Nosler Partition, 2570 fps180 gr · BC 0.474 · 783 m/s Power-Shok Rifle, 300 Savage, 180 Grain, Jacketed Soft Point, 2350 fps180 gr · BC 0.383 · 716 m/s Power-Shok Rifle, 308 Win, 180 Grain, Jacketed Soft Point, 2570 fps180 gr · BC 0.382 · 783 m/s Trophy Bonded Tip, 308 Win, 180 Grain, Trophy Bonded Tip, 2620 fps180 gr · BC 0.500 · 799 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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