Federal · Magnum

Terminal Ascent, 7MM PRC, 155 Grain, Terminal Ascent, 3100 fps

0.586BC (G1)

155.0gr10.04 g

945m/s3100 fps

4484J3307 ft·lb

Manufacturer	Federal
Calibre	7.21 mm (.284")
Bullet weight	155.0 gr · 10.04 g
Ballistic coefficient G1	0.586
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	944.9 m/s · 3100 fps
Muzzle energy	4484 J · 3307 ft·lb
Sectional density	0.275
Form factor	i1 0.469
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 4484 J (3307 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.275 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 0.586 is higher than 166 of them.

Similar 7.21 mm (.284") loads

Terminal Ascent, 7mm Backcountry, 155 Grain, Terminal Ascent, 3300 fps155 gr · BC 0.586 · 1006 m/s Terminal Ascent, 28 Nosler, 155 Grain, Terminal Ascent, 3200 fps155 gr · BC 0.586 · 975 m/s Terminal Ascent, 7mm Rem Mag, 155 Grain, Terminal Ascent, 3000 fps155 gr · BC 0.586 · 914 m/s GECO EXPRESS 7mm Rem. Mag. 10,0g155 gr · BC 0.418 · 890 m/s Terminal Ascent, 280 Ackley Improved, 155 Grain, Terminal Ascent, 2930 fps155 gr · BC 0.586 · 893 m/s GECO EXPRESS 7x64 10,0g155 gr · BC 0.418 · 880 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.

Get it on Google Play