Lapua · Pistol

22-lr-lapua-super-long-range-rimfire-ammo

0.172BC (G1)

40.0gr2.59 g

337m/s1106 fps

147J109 ft·lb

Manufacturer	Lapua
Calibre	5.66 mm (.223")
Bullet weight	40.0 gr · 2.59 g
Ballistic coefficient G1	0.172
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	337.0 m/s · 1106 fps
Muzzle energy	147 J · 109 ft·lb
Sectional density	0.115
Form factor	i1 0.669
Category	Pistol
Source	Lapua 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 147 J (109 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.115 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 40 loads of this bore diameter in the database, this one's G1 BC of 0.172 is higher than 36 of them.

Similar 5.66 mm (.223") loads

AR Tactical, 22 LR, 40 Grain, Copper Plated Round Nose, 1200 fps40 gr · BC 0.120 · 366 m/s Blazer® Rimfire40 gr · BC 0.133 · 376 m/s Clean-22, 22 LR, 40 Grain, Lead Round Nose, 1070 fps40 gr · BC 0.120 · 326 m/s Clean-22, 22 LR, 40 Grain, Lead Round Nose, 1235 fps40 gr · BC 0.130 · 376 m/s Clean-22, 22 LR, 40 Grain, Lead Round Nose, 1235 fps [6-946XMAS]40 gr · BC 0.130 · 376 m/s Clean-22, 22 LR, 40 Grain, Lead Round Nose, 1235 fps [6-955CC]40 gr · BC 0.130 · 376 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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