Norma · Rifle

Norma Ecostrike Silencer 308 Win 9.7 g

0.188BC (G7)

150.0gr9.72 g

860m/s2822 fps

3594J2651 ft·lb

Manufacturer	Norma
Calibre	7.82 mm (.308")
Bullet weight	150.0 gr · 9.72 g
Ballistic coefficient G1	0.376
Ballistic coefficient G7	0.188
Drag model used	G7
Muzzle velocity	860.0 m/s · 2822 fps
Muzzle energy	3594 J · 2651 ft·lb
Sectional density	0.226
Form factor	i7 1.203 · i1 0.601
Category	Rifle
Source	Norma website 2026-07-02 (verified)

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 3594 J (2651 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.226 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 G7 BC of 0.188 is higher than 21 of them.

Similar 7.82 mm (.308") loads

Barnes TSX, 308 Win, 150 Grain, Barnes Triple-Shock X Bullet (TSX), 2820 fps150 gr · BC 0.369 · 860 m/s Federal Training, 308 Win, 150 Grain, Full Metal Jacket Boat-Tail, 2820 fps150 gr · BC 0.408 · 860 m/s Fusion MSR, 300 Blackout, 150 Grain, Fusion Soft Point, 1900 fps150 gr · BC 0.330 · 579 m/s Fusion Rifle, 308 Win, 150 Grain, Fusion Soft Point, 2820 fps150 gr · BC 0.414 · 860 m/s Nosler Partition, 308 Win, 150 Grain, Nosler Partition, 2840 fps150 gr · BC 0.387 · 866 m/s Power-Shok Copper Rifle, 308 Win, 150 Grain, Copper HP, 2820 fps150 gr · BC 0.278 · 860 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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