.240 Weatherby Magnum

.240 Weatherby Magnum

Description

The .240 Weatherby Magnum was developed in 1968 by Roy Weatherby. In the development of his own .240in/6 mm cartridge, Weatherby was significantly influenced by both the success and the limitations of the .244 H&H Magnum cartridge devised in England by his friend and colleague David Lloyd. Wikipedia
 
Rifling twist1 in 10 in (250 mm)
Bullet diameter.243 in (6.2 mm)
Case length2.496 in (63.4 mm)
Case capacity64 gr H2O (4.1 cm3)
Overall length3.100 in (78.7 mm)
Rim diameter.472 in (12.0 mm)
Base diameter.453 in (11.5 mm)