Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 225gr | Sierra Pro-Hunter bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Accurate MAGPRO.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 53,766 psi | 88% | 2782 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 51,430 psi | 84% | 2762 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 52,257 psi | 86% | 2864 fps | 97.1% |
| ADI AR 2209 | <<locked>> | 90% | 52,301 psi | 86% | 2815 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 94% | 53,650 psi | 88% | 2871 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,950 psi | 79% | 2762 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,728 psi | 70% | 2723 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 52,605 psi | 86% | 2812 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 52,402 psi | 86% | 2818 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,301 psi | 88% | 2831 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 51,982 psi | 85% | 2802 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 53,621 psi | 88% | 2867 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,708 psi | 90% | 2844 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,983 psi | 89% | 2900 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,868 psi | 90% | 2927 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 52,634 psi | 86% | 2851 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,937 psi | 82% | 2835 fps | 98.2% |
| Bofors RP5 | <<locked>> | 94% | 53,621 psi | 88% | 2867 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 54,056 psi | 89% | 2762 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,837 psi | 87% | 2854 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 84% | 53,229 psi | 87% | 2812 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 52,460 psi | 86% | 2772 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 92% | 53,650 psi | 88% | 2812 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 52,518 psi | 86% | 2792 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 52,649 psi | 86% | 2746 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,794 psi | 87% | 2963 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 53,345 psi | 88% | 2844 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,086 psi | 61% | 1772 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 52,199 psi | 86% | 2749 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 52,156 psi | 86% | 2733 fps | 99.6% |
| IMR 4831 | <<locked>> | 86% | 51,924 psi | 85% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,723 psi | 90% | 2795 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 55,085 psi | 90% | 2904 fps | 98.6% |
| Lovex S065 | <<locked>> | 84% | 52,866 psi | 87% | 2736 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,360 psi | 89% | 2782 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,752 psi | 90% | 2795 fps | 100% |
| Norma 204 | <<locked>> | 86% | 52,866 psi | 87% | 2799 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 38,261 psi | 63% | 2648 fps | 97.1% |
| Norma MRP | <<locked>> | 92% | 53,258 psi | 87% | 2887 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 53,664 psi | 88% | 2802 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 51,793 psi | 85% | 2861 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 86% | 52,417 psi | 86% | 2802 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 53,998 psi | 89% | 2858 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,855 psi | 62% | 1814 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,100 psi | 90% | 2838 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,243 psi | 87% | 2861 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,519 psi | 88% | 2959 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,254 psi | 79% | 2838 fps | 96.4% |
| Rottweil R 904 | <<locked>> | 90% | 53,563 psi | 88% | 2782 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 92% | 54,810 psi | 90% | 2844 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 54,056 psi | 89% | 2762 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 52,866 psi | 87% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,360 psi | 89% | 2782 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 51,953 psi | 85% | 2687 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,360 psi | 89% | 2841 fps | 99.3% |
| Somchem S361 | <<locked>> | 88% | 51,561 psi | 85% | 2720 fps | 97.2% |
| Somchem S365 | <<locked>> | 88% | 53,925 psi | 89% | 2805 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 51,866 psi | 85% | 2766 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 82% | 52,707 psi | 87% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 51,837 psi | 85% | 2740 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,897 psi | 90% | 2802 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 54,578 psi | 90% | 2795 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 53,461 psi | 88% | 2822 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 53,185 psi | 87% | 2881 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 98% | 52,866 psi | 87% | 2858 fps | 98% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,690 psi | 82% | 2851 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,955 psi | 90% | 2753 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 53,403 psi | 88% | 2818 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 51,924 psi | 85% | 2920 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 51,706 psi | 85% | 2762 fps | 98.8% |
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% | 33,518 psi | 55% | 2405 fps | 96.8% |
| Accurate 4350 | <<locked>> | 80% | 45,005 psi | 74% | 2654 fps | 99.9% |
| Accurate MAGPRO | 90.9 gr | 88% | 45,237 psi | 74% | 2736 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 37,449 psi | 61% | 2523 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 88% | 43,787 psi | 72% | 2687 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 96% | 42,032 psi | 69% | 2644 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 92% | 33,040 psi | 54% | 2487 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,898 psi | 62% | 2530 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,960 psi | 71% | 2657 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,705 psi | 82% | 2776 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,550 psi | 62% | 2523 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,145 psi | 63% | 2575 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,126 psi | 53% | 2431 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,921 psi | 49% | 2392 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,998 psi | 57% | 2562 fps | 98.6% |
| Bofors RP15 | <<locked>> | 86% | 37,927 psi | 62% | 2569 fps | 95.4% |
| Bofors RP30 | <<locked>> | 94% | 40,712 psi | 67% | 2661 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 38,145 psi | 63% | 2575 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 47,688 psi | 78% | 2657 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 92% | 40,277 psi | 66% | 2612 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 46,586 psi | 76% | 2700 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 49,153 psi | 81% | 2717 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 43,685 psi | 72% | 2635 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,917 psi | 70% | 2621 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,582 psi | 67% | 2549 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,520 psi | 58% | 2585 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 45,992 psi | 76% | 2720 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 46% | 1581 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,149 psi | 71% | 2589 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,037 psi | 81% | 2680 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 42,844 psi | 70% | 2602 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,627 psi | 70% | 2582 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 42,032 psi | 69% | 2664 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 46,717 psi | 77% | 2635 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 44,991 psi | 74% | 2621 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 30,806 psi | 51% | 2336 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 43,149 psi | 71% | 2625 fps | 96.9% |
| Norma 217 | <<locked>> | 96% | 33,547 psi | 55% | 2530 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 34,780 psi | 57% | 2523 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 44,077 psi | 72% | 2641 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 41,800 psi | 69% | 2674 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 42,931 psi | 70% | 2635 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 34,693 psi | 57% | 2490 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,326 psi | 47% | 1621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,846 psi | 74% | 2674 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,989 psi | 71% | 2687 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,679 psi | 57% | 2562 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,802 psi | 74% | 2772 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 82% | 41,539 psi | 68% | 2566 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 36,825 psi | 60% | 2507 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 47,688 psi | 78% | 2657 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,717 psi | 77% | 2635 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 44,991 psi | 74% | 2621 fps | 98.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,614 psi | 75% | 2582 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,506 psi | 60% | 2503 fps | 95.1% |
| Somchem S361 | <<locked>> | 84% | 45,252 psi | 74% | 2612 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 40,959 psi | 67% | 2598 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,376 psi | 61% | 2493 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 80% | 49,501 psi | 81% | 2638 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,571 psi | 75% | 2638 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 34,592 psi | 57% | 2421 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 44,831 psi | 74% | 2638 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 35,984 psi | 59% | 2503 fps | 99.2% |
| Vihtavuori N560 | 87.2 gr | 86% | 43,178 psi | 71% | 2697 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 92% | 43,250 psi | 71% | 2684 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 98% | 46,166 psi | 76% | 2782 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,599 psi | 73% | 2602 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,746 psi | 77% | 2703 fps | 99.1% |
| Winchester StaBALL HD | 80.3 gr | 80% | 28,514 psi | 47% | 2438 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,506 psi | 60% | 2474 fps | 95% |
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 70 powders for .338 Lapua Mag. loaded with the .338 | 225gr | Sierra Pro-Hunter. Hodgdon Retumbo delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,772 fps to 2,963 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 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 225.0 gr projectile in 0.338" calls for a 1:15.5 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, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .338 Lapua Mag. with the .338 | 225gr | Sierra Pro-Hunter 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.