338 Rem Ultra Mag Load Data

33 published 338 Rem Ultra Mag reloading recipes across 10 powders and 1 bullet manufacturers, with bullet weights from 185 to 285 grains and recorded velocities between 2,349 and 3,379 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
33
Powders
10
Bullet makers
1
Bullet weights
185–285 gr

Sample 338 Rem Ultra Mag loads

The first 5 of 33 recipes.

BulletPowderChargeVelocityCOALPrimer
Barnes TSX BT 185grHodgdon H100094.5–102.5 gr3095.0–3292 fps3.575Remington 9 1/2M
Barnes TSX BT 185grIMR IMR 7828ssc88.0–95.5 gr3090.0–3302 fps3.575Remington 9 1/2M
Barnes TSX BT 185grRamshot Magnum97.0–104.0 gr3147.0–3363 fps3.575Remington 9 1/2M
Barnes TSX BT 185grMagPro95.0–100.0 gr3194.0–3311 fps—Remington 9 1/2M
Barnes TSX BT 185grAlliant RL 2289.0–96.5 gr3157.0–3379 fps—Remington 9 1/2M

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