.257 Roberts (Swift Data) Load Data

24 published .257 Roberts (Swift Data) reloading recipes across 6 powders and 1 bullet manufacturers, with bullet weights from 100 to 120 grains and recorded velocities between 2,570 and 3,062 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
24
Powders
6
Bullet makers
1
Bullet weights
100–120 gr

Sample .257 Roberts (Swift Data) loads

The first 5 of 24 recipes.

BulletPowderChargeVelocityCOALPrimer
Swift A-Frame 100grHodgdon H-41443.5 gr3,006 fps——
Swift A-Frame 100grHodgdon H-41440.5 gr2,898 fps——
Swift A-Frame 100grHodgdon H-483146.5 gr2,770 fps——
Swift A-Frame 100grHodgdon H-483150.0 gr3,007 fps——
Swift A-Frame 100grIMR IMR-435041.9 gr2,765 fps——

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