.257 Roberts +P (Ramshot Data Edition 4.5 - 2011) Load Data

10 published .257 Roberts +P (Ramshot Data Edition 4.5 - 2011) reloading recipes across 2 powders and 2 bullet manufacturers, with bullet weights from 75 to 117 grains and recorded velocities between 2,620 and 3,550 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
10
Powders
2
Bullet makers
2
Bullet weights
75–117 gr

Sample .257 Roberts +P (Ramshot Data Edition 4.5 - 2011) loads

The first 5 of 10 recipes.

BulletPowderChargeVelocityCOALPrimer
Nosler Ballistic Tip 100grRamshot Hunter42.0 gr2,800 fps——
Nosler Ballistic Tip 100grRamshot Hunter46.5 gr3,090 fps——
Nosler Ballistic Tip 100grRamshot Magnum50.0 gr2,780 fps——
Nosler Ballistic Tip 100grRamshot Magnum53.5 gr3,050 fps——
Sierra SPBT 117grRamshot Hunter40.0 gr2,620 fps——

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