GECO · Hunting

GECO PLUS 6,5x55 SE 10,1g

0.308BC (G1)

156.0gr10.11 g

750m/s2461 fps

2843J2097 ft·lb

Manufacturer	GECO
Calibre	6.72 mm (.265")
Bullet weight	156.0 gr · 10.11 g
Ballistic coefficient G1	0.308
Ballistic coefficient G7	not published
Drag model used	G1
Muzzle velocity	750.0 m/s · 2461 fps
Muzzle energy	2843 J · 2097 ft·lb
Sectional density	0.318
Form factor	i1 1.034
Category	Hunting
Source	GECO 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 2843 J (2097 ft·lb) is computed from the bullet weight and muzzle velocity above, not quoted from the catalogue. Sectional density 0.318 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 187 loads of this bore diameter in the database, this one's G1 BC of 0.308 is higher than 59 of them.

Similar 6.72 mm (.265") loads

Berger Elite Hunter, 6.5 Creedmoor +Peak, 156 Grain, Berger Elite Hunter, 2900 fps156 gr · BC 0.679 · 884 m/s 6.5 Creedmoor with the Lapua 10.1 g (156 gr) Mega hunting bullet156 gr · BC 0.377 · 780 m/s Norma Oryx 6,5 Creedmoor 10.1g156 gr · BC 0.348 · 780 m/s 6,5 CREEDMOOR SP 156 gr (Rifle ammunition SP)156 gr · BC 0.230 · 745 m/s Fusion Rifle, 6.5x55 Swedish, 156 Grain, Fusion Soft Point, 2500 fps156 gr · BC 0.489 · 762 m/s The 6.5×55 SE cartridge loaded with the 10.1 g (156 gr) Mega soft point hunting projectile156 gr · BC 0.377 · 780 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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