Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 231gr | Lapua Naturalis bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and Vihtavuori N560.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 52,388 psi | 86% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 53,795 psi | 88% | 2766 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,998 psi | 90% | 2877 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 92% | 55,013 psi | 90% | 2825 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 52,765 psi | 87% | 2825 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,065 psi | 77% | 2720 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,800 psi | 69% | 2677 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 51,764 psi | 85% | 2766 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 51,590 psi | 85% | 2772 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 52,272 psi | 86% | 2782 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,549 psi | 90% | 2815 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 52,562 psi | 86% | 2818 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 53,592 psi | 88% | 2795 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,866 psi | 87% | 2851 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 53,766 psi | 88% | 2877 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 54,868 psi | 90% | 2789 fps | 95.9% |
| Bofors RP15 | <<locked>> | 96% | 51,605 psi | 85% | 2805 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,704 psi | 80% | 2785 fps | 98.1% |
| Bofors RP5 | <<locked>> | 94% | 52,562 psi | 86% | 2818 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 53,171 psi | 87% | 2720 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,025 psi | 85% | 2808 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 84% | 52,228 psi | 86% | 2766 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 55,114 psi | 90% | 2782 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 52,692 psi | 87% | 2766 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 51,561 psi | 85% | 2746 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 51,808 psi | 85% | 2700 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,866 psi | 85% | 2917 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 52,489 psi | 86% | 2802 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,941 psi | 61% | 1742 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,824 psi | 90% | 2759 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,897 psi | 90% | 2746 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 54,404 psi | 89% | 2762 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 53,998 psi | 89% | 2756 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 54,128 psi | 89% | 2858 fps | 98.6% |
| Lovex S065 | <<locked>> | 86% | 55,100 psi | 90% | 2740 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 53,243 psi | 87% | 2736 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,374 psi | 88% | 2746 fps | 100% |
| Norma 204 | <<locked>> | 86% | 51,982 psi | 85% | 2753 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 37,144 psi | 61% | 2595 fps | 97% |
| Norma MRP | <<locked>> | 92% | 52,156 psi | 86% | 2838 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 52,591 psi | 86% | 2753 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,781 psi | 90% | 2877 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 55,100 psi | 90% | 2812 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 52,852 psi | 87% | 2812 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,666 psi | 62% | 1785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,056 psi | 89% | 2792 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 52,373 psi | 86% | 2818 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,315 psi | 86% | 2910 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,195 psi | 77% | 2792 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 82% | 54,317 psi | 89% | 2720 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 52,707 psi | 87% | 2740 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 92% | 53,882 psi | 88% | 2802 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 53,171 psi | 87% | 2720 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,100 psi | 90% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 53,243 psi | 87% | 2736 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,447 psi | 89% | 2602 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,476 psi | 89% | 2697 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 53,447 psi | 88% | 2795 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 54,041 psi | 89% | 2713 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,244 psi | 89% | 2733 fps | 97.9% |
| Somchem S365 | <<locked>> | 88% | 52,808 psi | 87% | 2756 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,259 psi | 89% | 2772 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 51,938 psi | 85% | 2644 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,404 psi | 89% | 2746 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 53,911 psi | 89% | 2756 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 53,534 psi | 88% | 2749 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 52,301 psi | 86% | 2772 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 52,170 psi | 86% | 2835 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 98% | 51,764 psi | 85% | 2812 fps | 98% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 48,414 psi | 79% | 2799 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 53,969 psi | 89% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 52,446 psi | 86% | 2769 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,824 psi | 90% | 2927 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,259 psi | 89% | 2769 fps | 99.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 32,213 psi | 53% | 2349 fps | 96.5% |
| Accurate 4350 | <<locked>> | 80% | 43,714 psi | 72% | 2605 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 88% | 44,295 psi | 73% | 2690 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 36,709 psi | 60% | 2484 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 88% | 42,931 psi | 70% | 2644 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 96% | 41,089 psi | 67% | 2602 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 92% | 32,082 psi | 53% | 2438 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,985 psi | 61% | 2484 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,177 psi | 69% | 2615 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,646 psi | 80% | 2730 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,651 psi | 60% | 2477 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,217 psi | 61% | 2530 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,082 psi | 51% | 2382 fps | 99.2% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,964 psi | 48% | 2343 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,794 psi | 55% | 2507 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 51,561 psi | 85% | 2733 fps | 95% |
| Bofors RP15 | <<locked>> | 86% | 36,869 psi | 61% | 2520 fps | 95.3% |
| Bofors RP30 | <<locked>> | 94% | 39,566 psi | 65% | 2612 fps | 95.6% |
| Bofors RP5 | <<locked>> | 84% | 37,217 psi | 61% | 2530 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 46,876 psi | 77% | 2612 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 92% | 39,276 psi | 64% | 2562 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 45,643 psi | 75% | 2654 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 48,312 psi | 79% | 2671 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 42,888 psi | 70% | 2592 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,078 psi | 74% | 2635 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,668 psi | 65% | 2503 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,869 psi | 61% | 2598 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 45,049 psi | 74% | 2674 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 45% | 1555 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,438 psi | 70% | 2546 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,385 psi | 79% | 2641 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 41,742 psi | 69% | 2556 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 41,814 psi | 69% | 2536 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 41,089 psi | 67% | 2618 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 45,672 psi | 75% | 2589 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 44,048 psi | 72% | 2579 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 29,472 psi | 48% | 2280 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 42,279 psi | 69% | 2579 fps | 96.9% |
| Norma 217 | <<locked>> | 98% | 34,679 psi | 57% | 2536 fps | 95.9% |
| Norma MRP | 79.9 gr | 80% | 33,765 psi | 55% | 2474 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 43,192 psi | 71% | 2595 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 40,857 psi | 67% | 2625 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 42,018 psi | 69% | 2589 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 33,663 psi | 55% | 2441 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 46% | 1594 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,787 psi | 72% | 2625 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,148 psi | 69% | 2641 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,721 psi | 55% | 2513 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 43,656 psi | 72% | 2723 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 50,836 psi | 83% | 2671 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,669 psi | 67% | 2520 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 35,810 psi | 59% | 2461 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 46,876 psi | 77% | 2612 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,672 psi | 75% | 2589 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 44,048 psi | 72% | 2579 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,169 psi | 84% | 2556 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,802 psi | 74% | 2539 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,491 psi | 58% | 2454 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 50,676 psi | 83% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,309 psi | 73% | 2566 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 40,001 psi | 66% | 2552 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,318 psi | 60% | 2444 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 80% | 48,631 psi | 80% | 2595 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,614 psi | 73% | 2592 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 35,984 psi | 59% | 2431 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 43,990 psi | 72% | 2595 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 34,838 psi | 57% | 2454 fps | 99.1% |
| Vihtavuori N560 | 85.9 gr | 86% | 42,177 psi | 69% | 2648 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 92% | 42,018 psi | 69% | 2635 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 98% | 45,063 psi | 74% | 2736 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,671 psi | 72% | 2556 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,818 psi | 75% | 2657 fps | 99.1% |
| Winchester StaBALL HD | 79.1 gr | 80% | 27,456 psi | 45% | 2382 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,261 psi | 63% | 2484 fps | 95.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 74 powders for .338 Lapua Mag. loaded with the .338 | 231gr | Lapua Naturalis. Winchester StaBALL HD delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,742 fps to 2,927 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 231.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, Norma MRP, Vihtavuori N560 rank at the top here: for .338 Lapua Mag. with the .338 | 231gr | Lapua Naturalis they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.