Hornady · Rifle

243 Win 100 gr InterLock® BTSP American Whitetail®

0.405BC (G1)

100.0gr6.48 g

902m/s2960 fps

2637J1945 ft·lb

Manufacturer	Hornady
Calibre	6.17 mm (.243")
Bullet weight	100.0 gr · 6.48 g
Ballistic coefficient G1	0.405
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	902.2 m/s · 2960 fps
Muzzle energy	2637 J · 1945 ft·lb
Sectional density	0.242
Form factor	i1 0.598
Category	Rifle
Source	Hornady 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 2637 J (1945 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.242 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 71 loads of this bore diameter in the database, this one's G1 BC of 0.405 is higher than 62 of them.

Similar 6.17 mm (.243") loads

Nosler Partition, 243 Win, 100 Grain, Nosler Partition, 2850 fps100 gr · BC 0.384 · 869 m/s Power-Shok Rifle, 243 Win, 100 Grain, Jacketed Soft Point, 2960 fps100 gr · BC 0.355 · 902 m/s Norma Oryx .243 Winchester 6.5g100 gr · BC 0.261 · 910 m/s Norma Whitetail .243 Winchester 6.5 g100 gr · BC 0.257 · 900 m/s 243 WIN. SP 100 gr (Rifle ammunition SP)100 gr · BC 0.158 · 870 m/s 6 mm CREEDMOOR SP 100 gr (Rifle ammunition SP)100 gr · BC 0.158 · 910 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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