.500 Jeffery

.500 Jeffery
TypeRifle
Place of originEngland
Production history
DesignerAugust Schuler
Designed~1920
Specifications
Case typeRebated, bottleneck
Bullet diameter.510 in (13.0 mm)
Neck diameter.538 in (13.7 mm)
Shoulder diameter.607 in (15.4 mm)
Base diameter.619 in (15.7 mm)
Rim diameter.575 in (14.6 mm)
Rim thickness.052 in (1.3 mm)
Case length2.75 in (70 mm)
Overall length3.46 in (88 mm)
Case capacity158 gr H2O (10.2 cm3)
Rifling twist1 in 17.7 in (450 mm)
Primer typeLarge rifle magnum
Ballistic performance
Bullet mass/type Velocity Energy
570 gr (37 g) Soft nose (BC: .368) 2,200 ft/s (670 m/s) 6,127 ft⋅lbf (8,307 J)
570 gr (37 g) Barnes TSX 2,507 ft/s (764 m/s) 7,957 ft⋅lbf (10,788 J)
535 gr (35 g) SP 2,549 ft/s (777 m/s) 7,721 ft⋅lbf (10,468 J)
600 gr (39 g) PP 2,468 ft/s (752 m/s) 8,117 ft⋅lbf (11,005 J)
465 gr (30 g) Lehigh solid 2,551 ft/s (778 m/s) 6,721 ft⋅lbf (9,112 J)
Test barrel length: 24 in (610 mm)
Source(s): Norma Ammunition RealGuns reloading data

The .500 Jeffery (12.7×70mmRB) is a big-game rifle cartridge that first appeared around 1920, and was originally introduced by the August Schuler Company, a German firm, under the European designation "12.7×70mm Schuler" or ".500 Schuler". When offered by the famed British outfitter W. J. Jeffery & Co., it was renamed the .500 Jeffery so as to be more palatable to British hunters and sportsmen following World War One.

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