Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 225gr | Swift A-Frame bullet and 69 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Accurate MAGPRO and Alliant Reloder-26.
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% | 54,288 psi | 89% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 51,996 psi | 85% | 2772 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 52,721 psi | 87% | 2874 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 90% | 52,794 psi | 87% | 2822 fps | 99% |
| ADI AR 2213 | <<locked>> | 94% | 54,114 psi | 89% | 2881 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,515 psi | 80% | 2776 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,207 psi | 71% | 2736 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 86% | 52,808 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,708 psi | 88% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 52,315 psi | 86% | 2808 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,128 psi | 89% | 2877 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 51,750 psi | 85% | 2805 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,462 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 51,445 psi | 84% | 2877 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 53,127 psi | 87% | 2861 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,415 psi | 83% | 2844 fps | 98.3% |
| Bofors RP5 | <<locked>> | 94% | 54,128 psi | 89% | 2877 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 54,404 psi | 89% | 2772 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,461 psi | 88% | 2864 fps | 99% |
| Hodgdon H414 | <<locked>> | 84% | 53,621 psi | 88% | 2822 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 52,823 psi | 87% | 2782 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 92% | 54,099 psi | 89% | 2822 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 52,997 psi | 87% | 2802 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 53,243 psi | 87% | 2753 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,403 psi | 88% | 2972 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 53,795 psi | 88% | 2854 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 61% | 1775 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 52,692 psi | 87% | 2759 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 52,504 psi | 86% | 2743 fps | 99.6% |
| IMR 4831 | <<locked>> | 86% | 52,504 psi | 86% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 51,924 psi | 85% | 2753 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 94% | 52,011 psi | 85% | 2858 fps | 98.1% |
| Lovex S065 | <<locked>> | 84% | 53,214 psi | 87% | 2746 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,694 psi | 90% | 2789 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 51,953 psi | 85% | 2756 fps | 99.9% |
| Norma 204 | <<locked>> | 86% | 53,388 psi | 88% | 2808 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 38,682 psi | 64% | 2657 fps | 97.3% |
| Norma MRP | <<locked>> | 92% | 53,766 psi | 88% | 2897 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 54,027 psi | 89% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 52,460 psi | 86% | 2874 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 86% | 52,910 psi | 87% | 2812 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,636 psi | 90% | 2871 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,797 psi | 62% | 1814 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 51,895 psi | 85% | 2792 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,780 psi | 88% | 2871 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,128 psi | 89% | 2972 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,834 psi | 80% | 2851 fps | 96.6% |
| Rottweil R 904 | <<locked>> | 90% | 54,041 psi | 89% | 2795 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 90% | 51,880 psi | 85% | 2802 fps | 99% |
| Rottweil R 907 | <<locked>> | 84% | 54,404 psi | 89% | 2772 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 53,214 psi | 87% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,694 psi | 90% | 2789 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 52,272 psi | 86% | 2697 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,853 psi | 90% | 2848 fps | 99.3% |
| Somchem S361 | <<locked>> | 88% | 51,982 psi | 85% | 2730 fps | 97.3% |
| Somchem S365 | <<locked>> | 88% | 54,302 psi | 89% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 52,373 psi | 86% | 2776 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 53,084 psi | 87% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 52,359 psi | 86% | 2749 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 51,938 psi | 85% | 2756 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 86% | 54,897 psi | 90% | 2802 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 53,867 psi | 88% | 2828 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 53,679 psi | 88% | 2890 fps | 98% |
| Vihtavuori N565 | <<locked>> | 98% | 53,534 psi | 88% | 2871 fps | 98.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,082 psi | 82% | 2858 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 51,590 psi | 85% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 53,795 psi | 88% | 2825 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 52,605 psi | 86% | 2930 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,156 psi | 86% | 2769 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% | 33,736 psi | 55% | 2411 fps | 96.9% |
| Accurate 4350 | <<locked>> | 80% | 45,237 psi | 74% | 2661 fps | 100% |
| Accurate MAGPRO | 91.6 gr | 88% | 45,716 psi | 75% | 2749 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 37,768 psi | 62% | 2533 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 86% | 41,220 psi | 68% | 2638 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 96% | 42,409 psi | 70% | 2657 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 92% | 33,330 psi | 55% | 2497 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,352 psi | 71% | 2667 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,111 psi | 82% | 2785 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,753 psi | 62% | 2530 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,638 psi | 63% | 2589 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,329 psi | 53% | 2438 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,182 psi | 50% | 2402 fps | 96% |
| Alliant Reloder-26 | 84.2 gr | 80% | 35,288 psi | 58% | 2569 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 38,276 psi | 63% | 2579 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 38,406 psi | 63% | 2608 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 38,638 psi | 63% | 2589 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 48,066 psi | 79% | 2667 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 92% | 40,654 psi | 67% | 2621 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 46,949 psi | 77% | 2710 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 49,516 psi | 81% | 2723 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 44,106 psi | 72% | 2644 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,221 psi | 71% | 2628 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,944 psi | 67% | 2556 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,781 psi | 59% | 2592 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 46,470 psi | 76% | 2730 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 46% | 1585 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,497 psi | 71% | 2595 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,385 psi | 81% | 2690 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 43,076 psi | 71% | 2608 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,902 psi | 70% | 2589 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 88% | 42,467 psi | 70% | 2677 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 46,934 psi | 77% | 2641 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 45,324 psi | 74% | 2631 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 31,009 psi | 51% | 2343 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 43,482 psi | 71% | 2631 fps | 97% |
| Norma 217 | <<locked>> | 96% | 33,924 psi | 56% | 2539 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 35,085 psi | 58% | 2533 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 44,469 psi | 73% | 2651 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 42,235 psi | 69% | 2684 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 43,279 psi | 71% | 2644 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 35,056 psi | 58% | 2500 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 47% | 1624 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,223 psi | 74% | 2680 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,468 psi | 71% | 2697 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,663 psi | 54% | 2507 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 45,339 psi | 74% | 2785 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 82% | 41,872 psi | 69% | 2572 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 37,028 psi | 61% | 2513 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 48,066 psi | 79% | 2667 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,934 psi | 77% | 2641 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 45,324 psi | 74% | 2631 fps | 99% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,977 psi | 75% | 2592 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,709 psi | 60% | 2510 fps | 95.3% |
| Somchem S361 | <<locked>> | 84% | 45,498 psi | 75% | 2618 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 41,379 psi | 68% | 2608 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,710 psi | 62% | 2500 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 80% | 49,850 psi | 82% | 2644 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,803 psi | 75% | 2644 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,896 psi | 57% | 2431 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 45,179 psi | 74% | 2644 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 36,332 psi | 60% | 2513 fps | 99.3% |
| Vihtavuori N560 | <<locked>> | 86% | 43,627 psi | 72% | 2707 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 92% | 43,540 psi | 71% | 2690 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 98% | 46,717 psi | 77% | 2795 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,918 psi | 74% | 2605 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,108 psi | 77% | 2710 fps | 99.2% |
| Winchester StaBALL HD | 80.9 gr | 80% | 28,776 psi | 47% | 2448 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,796 psi | 60% | 2480 fps | 95.1% |
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 69 powders for .338 Lapua Mag. loaded with the .338 | 225gr | Swift A-Frame. Hodgdon Retumbo delivers the highest muzzle velocity at 2,972 fps; across all powders the maximum-charge window runs from 1,775 fps to 2,972 fps. ADI AR 2217 gives the best case fill at 100 %, and 69 of the 69 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 1:16.5 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, Accurate MAGPRO, Alliant Reloder-26 rank at the top here: for .338 Lapua Mag. with the .338 | 225gr | Swift A-Frame 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.