Load data for .338 Rem. Ultra Mag. + 300gr Nosler Custom Competition
The most recommended powders for this combination are Hodgdon H1000.
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
Cartridge:.338 Rem. Ultra Mag. load data
Case Length (L3):2.760" | 70.1 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.895" | 22.7 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:1:12.0
Get PRO license to unlock all data and calculators
Community Loads for .338 Rem. Ultra Mag. + 300gr Nosler Custom Competition
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) |
|---|---|---|---|---|---|
| 82.5 gr | 3.590" | 24.0" | 2553 fps | ••• | |
| 82.0 gr | 3.590" | 24.0" | 2440 fps | ••• | |
| 84.0 gr | 3.590" | 24.0" | 2496 fps | ••• | |
| ••• | 3.590" | 24.0" | 2553 fps | ••• | |
| ••• | 3.590" | 24.0" | 2559 fps | ••• | |
| ••• | 3.590" | 24.0" | 2443 fps | ••• | |
| ••• | 3.590" | 24.0" | 2496 fps | ••• | |
| ••• | 3.590" | 24.0" | 2524 fps | ••• | |
| ••• | 3.590" | 24.0" | 2580 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.