550 Magnum Load Data

28 published 550 Magnum reloading recipes across 14 powders and 10 bullet manufacturers, with bullet weights from 600 to 800 grains and recorded velocities between 1,504 and 3,024 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
28
Powders
14
Bullet makers
10
Bullet weights
600–800 gr

Sample 550 Magnum loads

The first 5 of 28 recipes.

BulletPowderChargeVelocityCOALPrimer
HAW RN SP 600grAccurate A2495108.0–120.0 gr2210.0–2455 fps3.790Winchester LRM, Large Rifle Magnum
HAW RN SP 600grAccurate A2520113.4–126.0 gr2271.0–2523 fps3.790Winchester LRM, Large Rifle Magnum
HAWK RNSP1 600grAccurate ACCURATE 2495108.0–120.0 gr2210.0–2455 fps—Winchester WLR M
HAWK RNSP 600grAccurate ACCURATE 2520113.4–126.0 gr2271.0–2523 fps3.790Winchester WLR M
CPB L RN F 700grAccurate A201586.4–96.0 gr1872.0–2080 fps3.735Winchester LRM, Large Rifle Magnum

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