Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 225gr | Hornady SST InterLock bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and IMR 7828 SSC.
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% | 51,750 psi | 85% | 2749 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 53,330 psi | 88% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,853 psi | 88% | 2887 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 54,766 psi | 90% | 2749 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,114 psi | 89% | 2835 fps | 99% |
| ADI AR 2213 | <<locked>> | 94% | 51,822 psi | 85% | 2831 fps | 97.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,398 psi | 76% | 2726 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,147 psi | 68% | 2684 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,201 psi | 89% | 2831 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,114 psi | 89% | 2841 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 51,488 psi | 85% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 53,592 psi | 88% | 2822 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 94% | 51,605 psi | 85% | 2831 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 52,518 psi | 86% | 2812 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,909 psi | 85% | 2864 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 52,504 psi | 86% | 2894 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,172 psi | 89% | 2871 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,848 psi | 79% | 2799 fps | 97.6% |
| Bofors RP5 | <<locked>> | 94% | 51,605 psi | 85% | 2831 fps | 98.8% |
| Bofors RP7 | <<locked>> | 84% | 52,649 psi | 86% | 2733 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,039 psi | 84% | 2815 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 86% | 55,085 psi | 90% | 2838 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 54,418 psi | 89% | 2795 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 92% | 51,764 psi | 85% | 2772 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,360 psi | 89% | 2815 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,491 psi | 89% | 2766 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,807 psi | 83% | 2923 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 84% | 51,430 psi | 84% | 2812 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 61% | 1759 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,027 psi | 89% | 2772 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,056 psi | 89% | 2759 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 53,664 psi | 88% | 2779 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 53,301 psi | 88% | 2766 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 96% | 53,127 psi | 87% | 2867 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 54,636 psi | 90% | 2759 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 52,779 psi | 87% | 2753 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,866 psi | 87% | 2766 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,882 psi | 90% | 2825 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 36,608 psi | 60% | 2605 fps | 96.3% |
| Norma MRP | <<locked>> | 94% | 54,969 psi | 90% | 2910 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 51,953 psi | 85% | 2772 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,708 psi | 88% | 2884 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 54,288 psi | 89% | 2825 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 51,735 psi | 85% | 2818 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 62% | 1798 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,679 psi | 90% | 2844 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 53,301 psi | 88% | 2808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 51,459 psi | 84% | 2831 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,329 psi | 84% | 2920 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 53,853 psi | 88% | 2740 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 52,127 psi | 86% | 2753 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 92% | 53,084 psi | 87% | 2812 fps | 99% |
| Rottweil R 907 | <<locked>> | 84% | 52,649 psi | 86% | 2733 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,636 psi | 90% | 2759 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 52,779 psi | 87% | 2753 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,114 psi | 90% | 2795 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 53,954 psi | 89% | 2621 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,041 psi | 89% | 2713 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 52,634 psi | 86% | 2808 fps | 98.9% |
| Somchem S355 | <<locked>> | 82% | 53,505 psi | 88% | 2733 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,505 psi | 88% | 2743 fps | 97.4% |
| Somchem S365 | <<locked>> | 88% | 51,924 psi | 85% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 53,635 psi | 88% | 2789 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 54,665 psi | 90% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 53,737 psi | 88% | 2762 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 53,040 psi | 87% | 2766 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 86% | 52,852 psi | 87% | 2766 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,955 psi | 90% | 2838 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,940 psi | 90% | 2904 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,360 psi | 89% | 2877 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 53,214 psi | 87% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 51,619 psi | 85% | 2782 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,171 psi | 87% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,345 psi | 88% | 2779 fps | 98.9% |
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% | 2369 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 43,395 psi | 71% | 2621 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 46,746 psi | 77% | 2762 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 51,561 psi | 85% | 2700 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,856 psi | 64% | 2552 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 42,366 psi | 70% | 2654 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 43,352 psi | 71% | 2667 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 33,939 psi | 56% | 2507 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 39,131 psi | 64% | 2552 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,684 psi | 68% | 2631 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,906 psi | 79% | 2746 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,769 psi | 64% | 2546 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 84% | 36,898 psi | 61% | 2543 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,980 psi | 51% | 2402 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,921 psi | 47% | 2359 fps | 95% |
| Alliant Reloder-26 | 81.1 gr | 80% | 33,547 psi | 55% | 2523 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 39,073 psi | 64% | 2592 fps | 95.7% |
| Bofors RP30 | <<locked>> | 94% | 38,957 psi | 64% | 2621 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 36,898 psi | 61% | 2543 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 46,456 psi | 76% | 2628 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 94% | 41,611 psi | 68% | 2635 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 45,121 psi | 74% | 2667 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 47,703 psi | 78% | 2684 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 45,223 psi | 74% | 2657 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,425 psi | 73% | 2644 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,334 psi | 65% | 2520 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,535 psi | 60% | 2605 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 44,353 psi | 73% | 2687 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 45% | 1572 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,974 psi | 69% | 2559 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,790 psi | 78% | 2654 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 41,365 psi | 68% | 2572 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,034 psi | 72% | 2602 fps | 95.3% |
| IMR 7828 SSC | 85.2 gr | 90% | 43,395 psi | 71% | 2687 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,426 psi | 75% | 2605 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 43,700 psi | 72% | 2592 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 31,647 psi | 52% | 2356 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 41,814 psi | 69% | 2592 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 34,360 psi | 56% | 2546 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 33,518 psi | 55% | 2490 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 42,714 psi | 70% | 2612 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 40,321 psi | 66% | 2635 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 41,568 psi | 68% | 2605 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 35,911 psi | 59% | 2516 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,210 psi | 46% | 1608 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,807 psi | 83% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,236 psi | 71% | 2641 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,495 psi | 68% | 2654 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,431 psi | 55% | 2520 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,386 psi | 83% | 2690 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,004 psi | 71% | 2589 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 38,000 psi | 62% | 2530 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 46,456 psi | 76% | 2628 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,426 psi | 75% | 2605 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 43,700 psi | 72% | 2592 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,706 psi | 85% | 2743 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,720 psi | 83% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,469 psi | 73% | 2556 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,666 psi | 62% | 2526 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 50,357 psi | 83% | 2687 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,859 psi | 72% | 2579 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 39,508 psi | 65% | 2569 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,100 psi | 59% | 2461 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 48,138 psi | 79% | 2612 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,106 psi | 72% | 2608 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 35,723 psi | 59% | 2444 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,569 psi | 72% | 2612 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 34,621 psi | 57% | 2474 fps | 98.9% |
| Vihtavuori N560 | <<locked>> | 88% | 44,643 psi | 73% | 2723 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 44,324 psi | 73% | 2703 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,192 psi | 71% | 2572 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,281 psi | 74% | 2671 fps | 98.8% |
| Winchester StaBALL HD | 77.9 gr | 80% | 27,470 psi | 45% | 2402 fps | 98.9% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,811 psi | 62% | 2497 fps | 95.3% |
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 | 225gr | Hornady SST InterLock. Winchester StaBALL HD delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,759 fps to 2,940 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 60–90 %, leaving at least 10 % headroom. The 225.0 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 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. Alliant Reloder-26, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for .338 Lapua Mag. with the .338 | 225gr | Hornady SST InterLock 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.