257 Roberts Load Data

216 published 257 Roberts reloading recipes across 38 powders and 10 bullet manufacturers, with bullet weights from 75 to 120 grains and recorded velocities between 2,347 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
216
Powders
38
Bullet makers
10
Bullet weights
75–120 gr

Sample 257 Roberts loads

The first 5 of 216 recipes.

BulletPowderChargeVelocityCOALPrimer
BAR TSX-BT 100grAccurate A252033.3–37.0 gr2475.0–2813 fps2.760Federal 210, Large Rifle
NOS BT 100grAccurate A252033.8–37.5 gr2525.0–2869 fps2.775Federal 210, Large Rifle
NOS BT 100grAccurate A270040.9–43.0 gr2761.0–2937 fps2.775Federal 210, Large Rifle
BAR TSX-BT 100grAccurate A270039.0–41.0 gr2640.0–2808 fps2.760Federal 210, Large Rifle
BAR TSX-BT 100grAccurate A406435.1–39.0 gr2533.0–2879 fps2.760Federal 210, Large Rifle

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