.280 Jeffery

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.280 Jeffery
Type Rifle
Place of origin England
Production history
Designer W.J. Jeffery & Co
Designed 1913
Produced 1913
Parent case .333 Jeffery
Case type Rimless, bottleneck
Bullet diameter .288 in (7.3 mm)
Neck diameter .317 in (8.1 mm)
Shoulder diameter .504 in (12.8 mm)
Base diameter .542 in (13.8 mm)
Rim diameter .538 in (13.7 mm)
Case length 2.50 in (64 mm)
Overall length 3.45 in (88 mm)
Primer type .217/59
Ballistic performance
Bullet mass/type Velocity Energy
140 gr (9 g) 3,000 ft/s (910 m/s) 2,800 ft⋅lbf (3,800 J)
Source(s): Cartridges of the World.[1]

The .280 Jeffery, also known as the .280 Jeffery Rimless Nitro Express and the .33/280 Jeffery, is a rimless bottleneck centerfire rifle cartridge developed by W.J. Jeffery & Co and introduced in 1913.


The cartridge was created by Jeffery by necking down their successful .333 Jeffery to .288 inches. The .280 Jeffery's performance is comparable to the .280 Ross, the cartridge is larger than the Ross with greater capacity, but it is typically not loaded for greater velocities.[1][2]

The .280 Jeffery fires a 140 gr projectile at 3000 fps.[2]

See also[edit]


  1. ^ a b Frank C. Barnes, Cartridges of the World, Gun Digest Books, Iola, 2012, ISBN 978-1-4402-3059-2.
  2. ^ a b Wayne van Zwoll, Deer rifles & cartridges: a complete guide to all hunting situations, Skyhorse Publishing, New York, 2012, ISBN 978-1-61608-595-7.

External links[edit]