.255 Jeffery Rook

Key specs

Type

Rifle

Origin

United Kingdom

Designer

W. J. Jeffery & Co.

Case type

rimmed, bottleneck

Bullet diameter

6.48 mm

Case length

29.21 mm

Overall length

36.32 mm

Typical bullet

65 gr

Typical velocity

366 m/s

Typical energy

282 J