Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 225gr | Hornady GMX bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and ADI AR 2213.
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>> | 96% | 52,301 psi | 86% | 2756 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 54,012 psi | 89% | 2799 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,839 psi | 90% | 2904 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 52,895 psi | 87% | 2723 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 51,735 psi | 85% | 2795 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 52,968 psi | 87% | 2851 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,827 psi | 64% | 2631 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 51,866 psi | 85% | 2792 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,853 psi | 88% | 2743 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 51,663 psi | 85% | 2805 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,547 psi | 86% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,766 psi | 90% | 2841 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,475 psi | 86% | 2844 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,272 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,168 psi | 81% | 2822 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,417 psi | 88% | 2910 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,955 psi | 90% | 2884 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 54,462 psi | 89% | 2756 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,962 psi | 74% | 2746 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 52,475 psi | 86% | 2844 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 53,824 psi | 88% | 2749 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,573 psi | 80% | 2769 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 54,708 psi | 90% | 2776 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,707 psi | 87% | 2799 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 52,214 psi | 86% | 2759 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 53,040 psi | 87% | 2792 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,866 psi | 85% | 2776 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 51,996 psi | 85% | 2733 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,109 psi | 79% | 2871 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 52,707 psi | 87% | 2831 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,709 psi | 60% | 1749 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 51,895 psi | 85% | 2736 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,156 psi | 86% | 2726 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 54,563 psi | 90% | 2792 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,462 psi | 89% | 2782 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 54,070 psi | 89% | 2881 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 52,417 psi | 86% | 2723 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 53,650 psi | 88% | 2762 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,806 psi | 82% | 2720 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 52,489 psi | 86% | 2785 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 51,938 psi | 85% | 2864 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 52,808 psi | 87% | 2785 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,781 psi | 90% | 2900 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 51,808 psi | 85% | 2789 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,765 psi | 87% | 2835 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,420 psi | 61% | 1788 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,534 psi | 90% | 2762 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,040 psi | 85% | 2808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,128 psi | 89% | 2822 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,547 psi | 86% | 2851 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,370 psi | 79% | 2864 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 54,723 psi | 90% | 2753 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,142 psi | 87% | 2766 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 53,954 psi | 89% | 2828 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 53,824 psi | 88% | 2749 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,417 psi | 86% | 2723 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 53,650 psi | 88% | 2762 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,924 psi | 87% | 2762 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,011 psi | 85% | 2595 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 51,750 psi | 85% | 2677 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,534 psi | 88% | 2822 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 54,665 psi | 90% | 2753 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,592 psi | 90% | 2759 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 52,678 psi | 86% | 2785 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,476 psi | 89% | 2799 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 52,446 psi | 86% | 2677 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,781 psi | 90% | 2779 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,867 psi | 88% | 2779 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 53,940 psi | 89% | 2782 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,025 psi | 85% | 2799 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,083 psi | 86% | 2858 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,358 psi | 84% | 2828 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,418 psi | 89% | 2743 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,707 psi | 87% | 2799 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,664 psi | 88% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,578 psi | 90% | 2795 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% | 29,994 psi | 49% | 2320 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 40,915 psi | 67% | 2579 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 47,456 psi | 78% | 2779 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,647 psi | 82% | 2671 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,450 psi | 65% | 2566 fps | 95.6% |
| ADI AR 2213 | 83.9 gr | 90% | 43,105 psi | 71% | 2667 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 34,069 psi | 56% | 2510 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,682 psi | 65% | 2566 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,517 psi | 83% | 2694 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,566 psi | 65% | 2589 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,556 psi | 75% | 2710 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,276 psi | 64% | 2559 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,086 psi | 61% | 2549 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,037 psi | 48% | 2352 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,966 psi | 51% | 2421 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,285 psi | 51% | 2467 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 39,378 psi | 65% | 2598 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 51,024 psi | 84% | 2703 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,858 psi | 69% | 2684 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 37,086 psi | 61% | 2549 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 44,469 psi | 73% | 2592 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 42,279 psi | 69% | 2644 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 51,314 psi | 84% | 2723 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,946 psi | 71% | 2628 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,818 psi | 75% | 2648 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 46,108 psi | 76% | 2674 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,266 psi | 74% | 2661 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,057 psi | 61% | 2477 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,840 psi | 60% | 2615 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 42,061 psi | 69% | 2644 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 45% | 1562 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,147 psi | 66% | 2523 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,035 psi | 76% | 2621 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 39,204 psi | 64% | 2530 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,976 psi | 74% | 2618 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 44,135 psi | 72% | 2700 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 43,424 psi | 71% | 2569 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 41,669 psi | 68% | 2556 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 31,386 psi | 52% | 2356 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 39,813 psi | 65% | 2549 fps | 95.6% |
| Norma MRP | 78.9 gr | 82% | 33,794 psi | 55% | 2500 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 40,611 psi | 67% | 2572 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 40,915 psi | 67% | 2648 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,450 psi | 65% | 2562 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 36,245 psi | 60% | 2523 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 46% | 1598 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,097 psi | 84% | 2710 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,443 psi | 80% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,857 psi | 67% | 2598 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,436 psi | 65% | 2612 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,605 psi | 55% | 2526 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 48,008 psi | 79% | 2654 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,801 psi | 72% | 2605 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 38,508 psi | 63% | 2543 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,469 psi | 73% | 2592 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,424 psi | 71% | 2569 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 41,669 psi | 68% | 2556 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,472 psi | 81% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,762 psi | 80% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,366 psi | 70% | 2516 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,159 psi | 63% | 2539 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 48,138 psi | 79% | 2651 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,744 psi | 73% | 2595 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,231 psi | 61% | 2530 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,405 psi | 60% | 2470 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 46,064 psi | 76% | 2582 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,047 psi | 69% | 2572 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,013 psi | 59% | 2454 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 41,408 psi | 68% | 2572 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,329 psi | 53% | 2425 fps | 98.2% |
| Vihtavuori N560 | 86.6 gr | 90% | 45,324 psi | 74% | 2733 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 44,643 psi | 73% | 2710 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,118 psi | 68% | 2536 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,105 psi | 71% | 2631 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,556 psi | 42% | 2333 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,319 psi | 63% | 2510 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 76 powders for .338 Lapua Mag. loaded with the .338 | 225gr | Hornady GMX. Winchester StaBALL HD delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,749 fps to 2,949 fps. ADI AR 2225 gives the best case fill at 100 %, and 76 of the 76 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 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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. Norma MRP, Vihtavuori N560, ADI AR 2213 rank at the top here: for .338 Lapua Mag. with the .338 | 225gr | Hornady GMX 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.