.257 Weatherby Magnum

GPTKB entity

Statements (23)
Predicate Object
gptkbp:instanceOf shooting
gptkbp:basedOn .300 H&H Magnum case necked down to .25 caliber
gptkbp:bulletDiameter 0.257 in (6.53 mm)
gptkbp:countryOfOrigin gptkb:United_States
gptkbp:designedBy gptkb:Roy_Weatherby
gptkbp:diameter 0.512 in (13.00 mm)
0.530 in (13.46 mm)
https://www.w3.org/2000/01/rdf-schema#label .257 Weatherby Magnum
gptkbp:introduced 1944
gptkbp:judge belted, bottleneck
gptkbp:length 2.545 in (64.64 mm)
3.209 in (81.53 mm)
gptkbp:manufacturer Weatherby, Inc.
gptkbp:minimumPressure 65,000 psi
gptkbp:neckDiameter 0.283 in (7.19 mm)
gptkbp:notableFor high velocity
gptkbp:parent gptkb:.375_H&H_Magnum
gptkbp:primerType large rifle magnum
gptkbp:riflingTwist 1 in 10 in (254 mm)
gptkbp:shoulderDiameter 0.491 in (12.47 mm)
gptkbp:uses gptkb:hunting
gptkbp:bfsParent gptkb:Weatherby
gptkbp:bfsLayer 7