Load Specifications
Load data in caliber .338-378 Weath. Mag. with .338 | 230gr | Hornady ELD-X bullet and 71 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 55,521 psi | 87% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,072 psi | 88% | 2907 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 57,159 psi | 90% | 3045 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 88% | 54,128 psi | 85% | 2989 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 56,985 psi | 89% | 2976 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 55,143 psi | 86% | 2989 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 3015 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 2986 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,503 psi | 81% | 2976 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,130 psi | 90% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,478 psi | 89% | 2966 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,506 psi | 87% | 2986 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,072 psi | 89% | 2946 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,927 psi | 89% | 3015 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 53,650 psi | 84% | 2979 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3045 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,028 psi | 88% | 2946 fps | 98% |
| Bofors RP15 | <<locked>> | 92% | 54,708 psi | 86% | 2972 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 56,637 psi | 89% | 3028 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 55,506 psi | 87% | 2986 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,566 psi | 90% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 54,839 psi | 86% | 2979 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 57,479 psi | 90% | 2963 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 54,520 psi | 85% | 2920 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,305 psi | 90% | 2963 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,406 psi | 90% | 2881 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,883 psi | 88% | 3104 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 59% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,043 psi | 88% | 2897 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,478 psi | 89% | 2900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,288 psi | 87% | 2900 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 57,217 psi | 90% | 3028 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,094 psi | 74% | 2890 fps | 99% |
| Lovex S065 | <<locked>> | 82% | 56,347 psi | 88% | 2874 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,592 psi | 86% | 2874 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,855 psi | 89% | 2904 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,101 psi | 89% | 2956 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 47,688 psi | 75% | 2913 fps | 100% |
| Norma MRP | <<locked>> | 88% | 55,419 psi | 87% | 3002 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,346 psi | 85% | 2887 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 54,201 psi | 85% | 2989 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 56,927 psi | 89% | 2949 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,768 psi | 89% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,334 psi | 60% | 1900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,231 psi | 88% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,665 psi | 86% | 2959 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,579 psi | 89% | 3091 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,043 psi | 88% | 3058 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 86% | 54,259 psi | 85% | 2890 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 56,217 psi | 88% | 2956 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,566 psi | 90% | 2907 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,347 psi | 88% | 2874 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,592 psi | 86% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,201 psi | 87% | 2825 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,796 psi | 87% | 2953 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 55,608 psi | 87% | 2881 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 55,535 psi | 87% | 2890 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,623 psi | 89% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,883 psi | 88% | 2877 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,362 psi | 88% | 2907 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 55,274 psi | 87% | 2923 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 82% | 55,143 psi | 86% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,419 psi | 87% | 2920 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,027 psi | 86% | 3002 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 55,535 psi | 87% | 2989 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 56,710 psi | 89% | 3058 fps | 99.2% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,711 psi | 90% | 3117 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,347 psi | 87% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,638 psi | 90% | 2966 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,347 psi | 88% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,550 psi | 89% | 2923 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 39,639 psi | 62% | 2618 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 52,446 psi | 82% | 2854 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,236 psi | 68% | 2799 fps | 98% |
| Accurate MAGPRO | <<locked>> | 80% | 40,756 psi | 64% | 2733 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 43,569 psi | 68% | 2746 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 39,015 psi | 61% | 2680 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 86% | 35,549 psi | 56% | 2595 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 98% | 46,166 psi | 72% | 2910 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 82% | 28,297 psi | 44% | 2441 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,198 psi | 79% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,569 psi | 68% | 2740 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,610 psi | 62% | 2690 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,334 psi | 60% | 2641 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,054 psi | 52% | 2569 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,830 psi | 67% | 2799 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 46,876 psi | 73% | 2910 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 46,412 psi | 73% | 2772 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 36,796 psi | 58% | 2625 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 35,143 psi | 55% | 2615 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 39,610 psi | 62% | 2690 fps | 98% |
| Bofors RP7 | <<locked>> | 80% | 54,070 psi | 85% | 2854 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 33,736 psi | 53% | 2552 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 53,795 psi | 84% | 2907 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,626 psi | 65% | 2684 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,872 psi | 64% | 2671 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,224 psi | 74% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 32,300 psi | 51% | 2595 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 44% | 1660 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,298 psi | 77% | 2789 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 49,559 psi | 78% | 2795 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,917 psi | 67% | 2677 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 37,724 psi | 59% | 2661 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 90% | 33,547 psi | 53% | 2592 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 52,939 psi | 83% | 2822 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,271 psi | 80% | 2822 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,214 psi | 54% | 2497 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 49,864 psi | 78% | 2841 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 29,385 psi | 46% | 2500 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 41,785 psi | 65% | 2759 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 50,937 psi | 80% | 2838 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,434 psi | 59% | 2667 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 80% | 49,864 psi | 78% | 2841 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,576 psi | 53% | 2549 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,848 psi | 45% | 1699 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,576 psi | 82% | 2877 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,836 psi | 80% | 2900 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 31,372 psi | 49% | 2569 fps | 97.1% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 38,232 psi | 60% | 2720 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 44,614 psi | 70% | 2720 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 43,076 psi | 68% | 2726 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 54,070 psi | 85% | 2854 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,939 psi | 83% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,271 psi | 80% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,793 psi | 81% | 2772 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,728 psi | 67% | 2723 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 45,484 psi | 71% | 2707 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 48,472 psi | 76% | 2789 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,627 psi | 68% | 2707 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 52,431 psi | 82% | 2828 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,956 psi | 59% | 2582 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 94% | 51,677 psi | 81% | 2861 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 51,808 psi | 81% | 2835 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,801 psi | 67% | 2717 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,669 psi | 65% | 2753 fps | 96.9% |
| Vihtavuori N565 | <<locked>> | 82% | 36,840 psi | 58% | 2628 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 88% | 39,494 psi | 62% | 2733 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 94% | 46,427 psi | 73% | 2917 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,677 psi | 81% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,940 psi | 85% | 2910 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,447 psi | 56% | 2687 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,943 psi | 63% | 2631 fps | 98% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 71 powders for .338-378 Weath. Mag. loaded with the .338 | 230gr | Hornady ELD-X. Vihtavuori N570 delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,857 fps to 3,117 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 230.0 gr projectile in 0.338" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.