.257 Roberts (Pet Loads Update) Load Data

67 published .257 Roberts (Pet Loads Update) reloading recipes across 16 powders and 4 bullet manufacturers, with bullet weights from 75 to 120 grains and recorded velocities between 2,514 and 3,514 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
67
Powders
16
Bullet makers
4
Bullet weights
75–120 gr

Sample .257 Roberts (Pet Loads Update) loads

The first 5 of 67 recipes.

BulletPowderChargeVelocityCOALPrimer
Nosler SB 100grHodgdon H-20543.0 gr2,786 fps——
Nosler SB 100grHodgdon H-20545.0 gr2,928 fps——
Speer SP 100grHodgdon H-20544.0 gr3,023 fps——
Sierra Sp 100grHodgdon H-38044.0 gr3,007 fps——
Sierra Sp 100grHodgdon H-38043.0 gr2,964 fps——

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