.357 Magnum (Power Pro 300-MP) Load Data

12 published .357 Magnum (Power Pro 300-MP) reloading recipes across 1 powders and 3 bullet manufacturers, with bullet weights from 125 to 160 grains and recorded velocities between 1,253 and 1,569 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
12
Powders
1
Bullet makers
3
Bullet weights
125–160 gr

Sample .357 Magnum (Power Pro 300-MP) loads

The first 5 of 12 recipes.

BulletPowderChargeVelocityCOALPrimer
Speer JHP 125grAlliant Power Pro 300-MP20.0 gr1360 fps——
Speer JHP 125grAlliant Power Pro 300-MP22.3 gr1569 fps——
Speer JHP 125grAlliant Power Pro 300-MP21.0 gr1451 fps——
Hornady HP-XTP 140grAlliant Power Pro 300-MP19.5 gr1455 fps——
Hornady HP-XTP 140grAlliant Power Pro 300-MP18.5 gr1371 fps——

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