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Winchester · Rifle

Winchester Power-Point 270 WSM 150 gr

0.344BC (G1)
150.0gr9.72 g
960m/s3150 fps
4480J3304 ft·lb
ManufacturerWinchester
Calibre7.04 mm (.277")
Bullet weight150.0 gr  ·  9.72 g
Ballistic coefficient G10.344
Ballistic coefficient G7not published
Drag model usedG1
Muzzle velocity960.1 m/s  ·  3150 fps
Muzzle energy4480 J  ·  3304 ft·lb
Sectional density0.279
Form factori1 0.811
CategoryRifle
SourceWinchester 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 4480 J (3304 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.279 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 83 loads of this bore diameter in the database, this one's G1 BC of 0.344 is higher than 23 of them.

Similar 7.04 mm (.277") loads

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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