Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 250gr | Woodleigh PP SN bullet and 69 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 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>> | 92% | 54,940 psi | 90% | 2667 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 52,417 psi | 86% | 2641 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 53,388 psi | 88% | 2756 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 88% | 53,084 psi | 87% | 2697 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 92% | 54,447 psi | 89% | 2756 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,504 psi | 86% | 2726 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,050 psi | 77% | 2690 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 53,388 psi | 88% | 2697 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 53,447 psi | 88% | 2694 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 52,779 psi | 87% | 2687 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,694 psi | 90% | 2753 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 52,591 psi | 86% | 2677 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 51,880 psi | 85% | 2733 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 52,634 psi | 86% | 2756 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,547 psi | 86% | 2667 fps | 96.5% |
| Bofors RP15 | <<locked>> | 94% | 53,911 psi | 89% | 2740 fps | 99.7% |
| Bofors RP30 | <<locked>> | 98% | 51,692 psi | 85% | 2736 fps | 99.2% |
| Bofors RP5 | <<locked>> | 92% | 54,694 psi | 90% | 2753 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 54,389 psi | 89% | 2641 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 53,983 psi | 89% | 2749 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 82% | 53,780 psi | 88% | 2690 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 54,259 psi | 89% | 2697 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 53,316 psi | 88% | 2684 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 53,592 psi | 88% | 2621 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,447 psi | 89% | 2858 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,085 psi | 89% | 2723 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,318 psi | 61% | 1686 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 52,779 psi | 87% | 2631 fps | 99.9% |
| IMR 4831 | <<locked>> | 84% | 52,837 psi | 87% | 2635 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 51,909 psi | 85% | 2631 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 92% | 52,707 psi | 87% | 2740 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,511 psi | 70% | 2598 fps | 97.5% |
| Lovex S065 | <<locked>> | 82% | 53,113 psi | 87% | 2612 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,781 psi | 90% | 2657 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 52,736 psi | 87% | 2638 fps | 100% |
| Norma 204 | <<locked>> | 84% | 53,505 psi | 88% | 2680 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 42,888 psi | 70% | 2625 fps | 99.3% |
| Norma MRP | <<locked>> | 90% | 54,592 psi | 90% | 2772 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,317 psi | 89% | 2674 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 53,243 psi | 87% | 2759 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 53,287 psi | 87% | 2684 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 51,576 psi | 85% | 2697 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,145 psi | 63% | 1726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 52,388 psi | 86% | 2664 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,273 psi | 89% | 2740 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,013 psi | 90% | 2851 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,230 psi | 89% | 2815 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 88% | 54,215 psi | 89% | 2671 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 88% | 52,243 psi | 86% | 2677 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 82% | 54,389 psi | 89% | 2641 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 53,113 psi | 87% | 2612 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,781 psi | 90% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 52,112 psi | 86% | 2569 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 51,837 psi | 85% | 2674 fps | 99.6% |
| Somchem S361 | <<locked>> | 86% | 52,025 psi | 85% | 2608 fps | 98.3% |
| Somchem S365 | <<locked>> | 86% | 55,042 psi | 90% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 52,750 psi | 87% | 2654 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 52,605 psi | 86% | 2618 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 52,446 psi | 86% | 2638 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 51,779 psi | 85% | 2625 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,752 psi | 90% | 2700 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,331 psi | 89% | 2769 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 96% | 54,447 psi | 89% | 2756 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,114 psi | 90% | 2815 fps | 98.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,127 psi | 86% | 2805 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 51,692 psi | 85% | 2575 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 53,954 psi | 89% | 2694 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,462 psi | 89% | 2805 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 52,373 psi | 86% | 2648 fps | 99.5% |
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% | 36,695 psi | 60% | 2362 fps | 98.7% |
| Accurate 4350 | <<locked>> | 80% | 48,921 psi | 80% | 2589 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 40,335 psi | 66% | 2520 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 40,683 psi | 67% | 2480 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 82% | 38,812 psi | 64% | 2470 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 90% | 37,637 psi | 62% | 2444 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 86% | 29,820 psi | 49% | 2297 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,089 psi | 67% | 2480 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,818 psi | 77% | 2595 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,712 psi | 67% | 2474 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,637 psi | 60% | 2425 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,273 psi | 58% | 2385 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,632 psi | 50% | 2310 fps | 97.7% |
| Alliant Reloder-26 | 83.4 gr | 80% | 38,885 psi | 64% | 2523 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,472 psi | 81% | 2615 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 34,098 psi | 56% | 2365 fps | 95.3% |
| Bofors RP30 | <<locked>> | 88% | 36,811 psi | 60% | 2457 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 36,637 psi | 60% | 2425 fps | 96.5% |
| Bofors RP7 | <<locked>> | 80% | 51,111 psi | 84% | 2592 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 35,926 psi | 59% | 2405 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 50,517 psi | 83% | 2641 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 38,798 psi | 64% | 2421 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,712 psi | 67% | 2461 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,164 psi | 73% | 2484 fps | 100% |
| Hodgdon Retumbo | 80 gr | 82% | 31,952 psi | 52% | 2382 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 50,328 psi | 83% | 2667 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,036 psi | 46% | 1509 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,470 psi | 76% | 2530 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 46,398 psi | 76% | 2539 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,379 psi | 66% | 2421 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 82% | 37,463 psi | 62% | 2451 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,217 psi | 61% | 2487 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 49,966 psi | 82% | 2562 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,428 psi | 80% | 2559 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 31,676 psi | 52% | 2247 fps | 97.3% |
| Norma 204 | <<locked>> | 80% | 46,789 psi | 77% | 2572 fps | 98.7% |
| Norma 217 | <<locked>> | 90% | 30,632 psi | 50% | 2346 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 38,406 psi | 63% | 2487 fps | 98.3% |
| Norma URP | <<locked>> | 80% | 47,834 psi | 79% | 2575 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,072 psi | 61% | 2454 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 46,702 psi | 77% | 2579 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 30,792 psi | 51% | 2287 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 47% | 1545 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,849 psi | 80% | 2612 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,094 psi | 77% | 2631 fps | 100% |
| ReloadSwiss RS 76 | 85.6 gr | 82% | 30,937 psi | 51% | 2356 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 39,958 psi | 66% | 2559 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 41,930 psi | 69% | 2461 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 40,103 psi | 66% | 2461 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 80% | 51,111 psi | 84% | 2592 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,966 psi | 82% | 2562 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,428 psi | 80% | 2559 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,936 psi | 80% | 2520 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,769 psi | 65% | 2457 fps | 97.5% |
| Somchem S361 | <<locked>> | 80% | 42,685 psi | 70% | 2448 fps | 96.2% |
| Somchem S365 | <<locked>> | 80% | 45,005 psi | 74% | 2536 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,712 psi | 67% | 2448 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 80% | 49,168 psi | 81% | 2569 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,273 psi | 58% | 2329 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 80% | 48,501 psi | 80% | 2572 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,595 psi | 65% | 2457 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,479 psi | 63% | 2477 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 86% | 38,841 psi | 64% | 2477 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 94% | 44,512 psi | 73% | 2635 fps | 96% |
| Vihtavuori N570 | <<locked>> | 98% | 48,385 psi | 79% | 2740 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,225 psi | 79% | 2526 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,517 psi | 83% | 2641 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,705 psi | 52% | 2418 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,202 psi | 61% | 2375 fps | 96.6% |
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 | 250gr | Woodleigh PP SN. Hodgdon Retumbo delivers the highest muzzle velocity at 2,858 fps; across all powders the maximum-charge window runs from 1,686 fps to 2,858 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 250.0 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, Hodgdon TrailBoss 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. Hodgdon Retumbo, ReloadSwiss RS 76, Alliant Reloder-26 rank at the top here: for .338 Lapua Mag. with the .338 | 250gr | Woodleigh PP SN 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.