Back

.240 Apex

.240 Magnum Rimless
TypeRifle
Place of originEngland
Production history
DesignerHolland & Holland
Designed1920
ManufacturerHolland & Holland
Specifications
Case typeBelted rimless
Bullet diameter.245 in (6.2 mm)
Neck diameter.274 in (7.0 mm)
Shoulder diameter.403 in (10.2 mm)
Base diameter.450 in (11.4 mm)
Rim diameter.467 in (11.9 mm)
Rim thickness.035 in (0.89 mm)
Case length2.49 in (63 mm)
Overall length3.21 in (82 mm)
Primer typeKynoch # 81
Ballistic performance
Bullet mass/type Velocity Energy
100 gr (6 g) SP 2,900 ft/s (880 m/s) 1,865 ft⋅lbf (2,529 J)
Source(s): Cartridges of the World.[1]
.240 Magnum Flanged
Specifications
Case typeRimmed
Bullet diameter.245 in (6.2 mm)
Neck diameter.274 in (7.0 mm)
Shoulder diameter.402 in (10.2 mm)
Base diameter.448 in (11.4 mm)
Rim diameter.513 in (13.0 mm)
Rim thicknessUNK
Case length2.5 in (64 mm)
Overall length3.25 in (83 mm)
Primer typeKynoch # 81
Ballistic performance
Bullet mass/type Velocity Energy
100 gr (6 g) SN 2,775 ft/s (846 m/s) 1,711 ft⋅lbf (2,320 J)
Test barrel length: 28
Source(s): Kynoch Ammunition.[2]

The .240 Magnum Rimless Holland & Holland (also known as the .240 Apex and the .240 Super Express) and the .240 Magnum Flanged are a pair of centrefire sporting rifle cartridges developed in English gunmakers Holland & Holland in the 1920s, primarily for use in hunting deer and plains game.[1]

  1. ^ a b Barnes, Frank C., Cartridges of the World, 15th ed, Gun Digest Books, Iola, 2016, ISBN 978-1-4402-4642-5.
  2. ^ Kynoch Ammunition, "Big Game Cartridges", www.kynochammunition.co.uk, archived, 15 August 2016.