Load data for .338 Rem. Ultra Mag. + 225gr Barnes TTSX BT
The most recommended powders for this combination are IMR 4350, Hodgdon H4831 and Hodgdon H4831 SC.
Based on C.I.P., the max. allowed case length is 2.760 in / 70.11 mm, the max. cartridge length is 3.600 in / 91.44 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Based on C.I.P., the max. allowed case length is 2.760 in / 70.11 mm, the max. cartridge length is 3.600 in / 91.44 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Load Specifications
ImperialMetric
Bullet:.338 | 225gr | TTSX BT
Cartridge:.338 Rem. Ultra Mag. load data
Case Length (L3):2.760" | 70.1 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.707" | 18.0 mm
Case Capacity:110 gow | 7.13 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:12.5
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Community Loads for .338 Rem. Ultra Mag. + 225gr Barnes TTSX BT
Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.
| Powder | Charge (gr) | C.O.L. | Barrel Length | Velocity (fps) | Pressure (psi) |
|---|---|---|---|---|---|
| 80.5 gr | 3.600" | 24.0" | 2608 fps | ••• | |
| 89.0 gr | 3.600" | 24.0" | 2876 fps | ••• | |
| 84.5 gr | 3.600" | 24.0" | 2542 fps | ••• | |
| ••• | 3.600" | 24.0" | 2791 fps | ••• | |
| ••• | 3.600" | 24.0" | 2612 fps | ••• | |
| ••• | 3.600" | 24.0" | 2871 fps | ••• | |
| ••• | 3.600" | 24.0" | 2529 fps | ••• | |
| ••• | 3.600" | 24.0" | 2795 fps | ••• | |
| ••• | 3.600" | 24.0" | 2579 fps | ••• | |
| ••• | 3.600" | 24.0" | 2822 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.