Berger Hybrid Hunter, 280 Ackley Improved, 168 Grain, Berger Hybrid, 2800 fps
| Manufacturer | Federal |
|---|---|
| Calibre | 7.21 mm (.284") |
| Bullet weight | 168.0 gr · 10.89 g |
| Ballistic coefficient G1 | 0.566 |
| Ballistic coefficient G7 | not published |
| Drag model used | G1 |
| Muzzle velocity | 853.4 m/s · 2800 fps |
| Muzzle energy | 3964 J · 2924 ft·lb |
| Sectional density | 0.298 |
| Form factor | i1 0.526 |
| 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 3964 J (2924 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.298 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 0.566 is higher than 161 of them.
Similar 7.21 mm (.284") loads
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