Federal · Hunting

Power-Shok Rifle, 303 British, 180 Grain, Jacketed Soft Point, 2460 fps

0.328BC (G1)

180.0gr11.66 g

750m/s2460 fps

3279J2418 ft·lb

Manufacturer	Federal
Calibre	7.90 mm (.311")
Bullet weight	180.0 gr · 11.66 g
Ballistic coefficient G1	0.328
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	749.8 m/s · 2460 fps
Muzzle energy	3279 J · 2418 ft·lb
Sectional density	0.266
Form factor	i1 0.810
Category	Hunting
Source	Federal 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 3279 J (2418 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.266 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 9 loads of this bore diameter in the database, this one's G1 BC of 0.328 is higher than 4 of them.

Similar 7.90 mm (.311") loads

303 BRITISH FMJ 180 gr (Rifle ammunition FMJ)180 gr · BC 0.255 · 755 m/s 303 BRITISH FMJ 180 gr (Tactical Rifle Ammunition (FMJ))180 gr · BC 0.255 · 755 m/s 303 BRITISH SP 180 gr (Rifle ammunition SP)180 gr · BC 0.153 · 726 m/s Winchester Power-Point 303 British 180 gr180 gr · BC 0.369 · 750 m/s Winchester Rifle 303 British 180 gr180 gr · BC 0.369 · 750 m/s Power-Shok Rifle, 303 British, 150 Grain, Jacketed Soft Point, 2690 fps150 gr · BC 0.356 · 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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