Winchester · Rifle

Winchester Deer Season XP 7.62 x 39mm 123 gr

0.304BC (G1)

123.0gr7.97 g

725m/s2380 fps

2097J1547 ft·lb

Manufacturer	Winchester
Calibre	7.92 mm (.312")
Bullet weight	123.0 gr · 7.97 g
Ballistic coefficient G1	0.304
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	725.4 m/s · 2380 fps
Muzzle energy	2097 J · 1547 ft·lb
Sectional density	0.181
Form factor	i1 0.594
Category	Rifle
Source	Winchester 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 2097 J (1547 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.181 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 17 loads of this bore diameter in the database, this one's G1 BC of 0.304 is higher than 14 of them.

Similar 7.92 mm (.312") loads

Power-Shok Rifle, 7.62x39, 123 Grain, Jacketed Soft Point, 2350 fps123 gr · BC 0.274 · 716 m/s 7.62x39 123 gr FMJ Frontier®123 gr · BC 0.266 · 713 m/s 7.62x39 123 gr SST® Hornady BLACK®123 gr · BC 0.295 · 716 m/s SAKO Rapid Expansion Series 7,62 x 39 8 g / 123 gr123 gr · BC 0.222 · 715 m/s Winchester Power-Point 7.62 x 39mm 123 gr123 gr · BC 0.244 · 721 m/s Winchester Rifle 7.62 x 39mm 123 gr123 gr · BC 0.244 · 721 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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