.257 Roberts in a 21-inch Barrel Load Data

48 published .257 Roberts in a 21-inch Barrel reloading recipes across 22 powders and 6 bullet manufacturers, with bullet weights from 75 to 120 grains and recorded velocities between 1,742 and 3,277 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
48
Powders
22
Bullet makers
6
Bullet weights
75–120 gr

Sample .257 Roberts in a 21-inch Barrel loads

The first 5 of 48 recipes.

BulletPowderChargeVelocityCOALPrimer
Remington Core-Lokt PSP 100grRamshot Big Game43.0 gr2811 fps——
Barnes Triple-Shock 100grHodgdon H-435046.0 gr3001 fps——
Nosler Ballistic Tip 100grRamshot Hunter45.0 gr2863 fps——
Sierra HPBT Match 100grRamshot Hunter45.5 gr2795 fps——
Remington Core-Lokt PSP 100grRamshot Hunter45.0 gr2864 fps——

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