6.5-300 Weatherby Magnum

6.5-300 Weatherby Magnum
Left: 6.5mm Grendel. Right: 6.5-300 Weatherby Magnum.
TypeRifle
Place of originUSA
Production history
DesignerWeatherby
DesignedRoy Weatherby experimented with the design in the 1950s. It wasn’t commercialized until 2016.
ManufacturerWeatherby
Produced2016
Specifications
Parent case.300 Weatherby Magnum
Case typeBelted, bottleneck
Bullet diameter.264 in (6.7 mm)
Shoulder diameter.4949 in (12.57 mm)
Base diameter.512 in (13.0 mm)
Rim diameter.5315 in (13.50 mm)
Case length2.825 in (71.8 mm)
Overall length3.600 in (91.4 mm)
Case capacity98 gr H2O (6.4 cm3)
Rifling twist1-8"
Primer typeLarge rifle magnum
Ballistic performance
Bullet mass/type Velocity Energy
127 gr (8 g) LRX 3,531 ft/s (1,076 m/s) 3,516 ft⋅lbf (4,767 J)
130 gr (8 g) Scirocco 3,476 ft/s (1,059 m/s) 3,487 ft⋅lbf (4,728 J)
140 gr (9 g) A-Frame 3,395 ft/s (1,035 m/s) 3,583 ft⋅lbf (4,858 J)
Test barrel length: 26
Source(s): Weatherby

The 6.5-300 Weatherby Magnum is a 6.5mm cartridge created by Weatherby in 2016 for the growing 6.5mm long-range rifle market.

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