Federal · Magnum

Barnes TSX, 7mm Rem Mag, 160 Grain, Barnes Triple-Shock X Bullet (TSX), 2940 fps

0.392BC (G1)

160.0gr10.37 g

896m/s2940 fps

4163J3070 ft·lb

Manufacturer	Federal
Calibre	7.21 mm (.284")
Bullet weight	160.0 gr · 10.37 g
Ballistic coefficient G1	0.392
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	896.1 m/s · 2940 fps
Muzzle energy	4163 J · 3070 ft·lb
Sectional density	0.284
Form factor	i1 0.724
Category	Magnum
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 4163 J (3070 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.284 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 177 loads of this bore diameter in the database, this one's G1 BC of 0.392 is higher than 101 of them.

Similar 7.21 mm (.284") loads

Nosler Partition, 7mm Rem Mag, 160 Grain, Nosler Partition, 2950 fps160 gr · BC 0.475 · 899 m/s Trophy Bonded Tip, 7mm Rem Mag, 160 Grain, Trophy Bonded Tip, 2900 fps160 gr · BC 0.520 · 884 m/s 7mm PRC 160 gr CX® Outfitter®160 gr · BC 0.596 · 914 m/s Norma TIPSTRIKE 7 mm Remington Magnum 10.4g160 gr · BC 0.510 · 920 m/s Winchester Expedition Big Game 7mm Remington Magnum 160 gr160 gr · BC 0.512 · 899 m/s Winchester Rifle 7mm Remington Magnum 160 gr160 gr · BC 0.512 · 899 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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