.257 Roberts +P Handload Data (50,000 CUP) Load Data

19 published .257 Roberts +P Handload Data (50,000 CUP) reloading recipes across 8 powders and 3 bullet manufacturers, with bullet weights from 75 to 120 grains and recorded velocities between 2,683 and 3,419 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
19
Powders
8
Bullet makers
3
Bullet weights
75–120 gr

Sample .257 Roberts +P Handload Data (50,000 CUP) loads

The first 5 of 19 recipes.

BulletPowderChargeVelocityCOALPrimer
Hornady Spire Point 100grAlliant RL-1948.0 gr3,062 fps—Winchester Large Rifle
Hornady Spire Point 100grAlliant RL-1949.5 gr3,179 fps—Winchester Large Rifle
Hornady Spire Point 100grAlliant RL-1949.0 gr3,130 fps—Winchester Large Rifle
Nosler Ballistic Tip 115grHodgdon H-4831sc46.0 gr2,809 fps—Winchester Large Rifle
Nosler Ballistic Tip 115grHodgdon H-4831sc45.0 gr2,762 fps—Winchester Large Rifle

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