SAKO · Rifle

SAKO Rapid Expansion Series 22-250 Rem. 3.2 g / 49 gr

0.248BC (G1)

49.0gr3.18 g

1140m/s3740 fps

2063J1522 ft·lb

Manufacturer	SAKO
Calibre	5.70 mm (.224")
Bullet weight	49.0 gr · 3.18 g
Ballistic coefficient G1	0.248
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	1140.0 m/s · 3740 fps
Muzzle energy	2063 J · 1522 ft·lb
Sectional density	0.139
Form factor	i1 0.560
Category	Rifle
Source	SAKO 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 2063 J (1522 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.139 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 206 loads of this bore diameter in the database, this one's G1 BC of 0.248 is higher than 129 of them.

Similar 5.70 mm (.224") loads

SAKO Rapid Expansion Series 223 Rem. 3.2 g / 49 gr49 gr · BC 0.248 · 1065 m/s SAKO Target Series 22-250 Rem. 3.2 g / 49 gr49 gr · BC 0.189 · 1150 m/s SAKO Target Series 222 Rem. 3.2 g / 49 gr49 gr · BC 0.189 · 970 m/s .222 Rem. SOFT POINT 3.2 g49 gr · BC 0.186 · 1020 m/s Power-Shok Rifle, 222 Rem, 50 Grain, Jacketed Soft Point, 3140 fps50 gr · BC 0.184 · 957 m/s Varmint & Predator, 22-250 Rem, 50 Grain, Jacketed Hollow Point, 3850 fps50 gr · BC 0.204 · 1174 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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