.257 Weatherby Magnum (Norma Data) Load Data

18 published .257 Weatherby Magnum (Norma Data) reloading recipes across 2 powders and 3 bullet manufacturers, with bullet weights from 87 to 120 grains and recorded velocities between 3,087 and 3,760 fps. Every load lists charge weight, velocity, COAL, primer and case where the source published it.

Always begin at the minimum charge weight and work up gradually. Never exceed maximum loads. Verify all data against a current published reloading manual before use. LoadDevelopment.com is not responsible for errors or omissions in this data.
Recipes
18
Powders
2
Bullet makers
3
Bullet weights
87–120 gr

Sample .257 Weatherby Magnum (Norma Data) loads

The first 5 of 18 recipes.

BulletPowderChargeVelocityCOALPrimer
Nosler Partition 100grNorma MRP69.0 gr3,432 fps——
Nosler BST 100grNorma MRP72.4 gr3,609 fps——
Nosler Partition 100grNorma MRP72.7 gr3,602 fps——
Nosler BST 100grNorma MRP69.0 gr3,428 fps——
Nosler BST 100grNorma MRP-274.0 gr3,301 fps——

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