.300 Mashburn Short Magnum (P.O. Ackley Data) Load Data

11 published .300 Mashburn Short Magnum (P.O. Ackley Data) reloading recipes across 5 powders, with bullet weights from 130 to 250 grains and recorded velocities between 2,470 and 3,415 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
11
Powders
5
Bullet makers
0
Bullet weights
130–250 gr

Sample .300 Mashburn Short Magnum (P.O. Ackley Data) loads

The first 5 of 11 recipes.

BulletPowderChargeVelocityCOALPrimer
130grIMR IMR-303160.0 gr3390 fps——
130grIMR IMR-406464.0 gr3410 fps——
130grIMR IMR-432065.0 gr3415 fps——
130grIMR IMR-435073.0 gr3400 fps——
150grIMR IMR-435068.0 gr3300 fps——

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