.17 Ackley Bee

The .17 Ackley Bee is a wildcat centerfire rifle cartridge named after its designer, P.O. Ackley, and is a .218 Bee case necked down to .17 caliber with a squarer shoulder and less body taper. Being a rimmed case it was popular with single shot rifles such as the Martini Cadet and Low Wall Winchester.[2] The caliber is well suited to varmint hunting particularly where minimal pelt damage is required.

.17 Ackley Bee
Type	Rifle
Place of origin	United States
Production history
Designer	P.O. Ackley
Designed	1940s
Specifications
Parent case	.218 Bee
Case type	Rimmed, bottleneck
Bullet diameter	0.172 in (4.4 mm)
Neck diameter	0.195 in (5.0 mm)
Shoulder diameter	0.334 in (8.5 mm)
Base diameter	0.349 in (8.9 mm)
Rim diameter	0.408 in (10.4 mm)
Rim thickness	.065 in (1.7 mm)
Case length	1.35 in (34 mm)
Case capacity	16.89 gr H2O (1.094 cm3)
Rifling twist	1-12 inches
Primer type	Small rifle [1]
Ballistic performance
Bullet mass/type Velocity Energy 20 gr (1 g) HP 3,845 ft/s (1,172 m/s) 657 ft⋅lbf (891 J) 25 gr (2 g) SP 3,285 ft/s (1,001 m/s) 599 ft⋅lbf (812 J)
Source(s): Reload Bench [2]