Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 250gr | Hornady SP bullet and 72 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 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 52,924 psi | 87% | 2635 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,201 psi | 89% | 2661 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,302 psi | 89% | 2776 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 90% | 51,459 psi | 84% | 2720 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 90% | 54,940 psi | 90% | 2720 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 52,750 psi | 87% | 2723 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,560 psi | 83% | 2684 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,078 psi | 74% | 2651 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,085 psi | 90% | 2713 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 84% | 51,619 psi | 85% | 2664 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,433 psi | 89% | 2707 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 52,895 psi | 87% | 2720 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,157 psi | 89% | 2694 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 53,476 psi | 88% | 2753 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,346 psi | 89% | 2776 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,389 psi | 89% | 2687 fps | 96.7% |
| Bofors RP15 | <<locked>> | 94% | 51,953 psi | 85% | 2707 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,924 psi | 87% | 2749 fps | 99.3% |
| Bofors RP5 | <<locked>> | 92% | 52,895 psi | 87% | 2720 fps | 99.6% |
| Bofors RP7 | <<locked>> | 82% | 53,011 psi | 87% | 2612 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 98% | 52,127 psi | 86% | 2713 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 82% | 52,185 psi | 86% | 2661 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 54,665 psi | 90% | 2671 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 90% | 52,562 psi | 86% | 2664 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 51,648 psi | 85% | 2651 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 51,880 psi | 85% | 2592 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 52,388 psi | 86% | 2818 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 52,272 psi | 86% | 2694 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,231 psi | 61% | 1673 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,491 psi | 89% | 2648 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,346 psi | 89% | 2631 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,462 psi | 89% | 2651 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 53,766 psi | 88% | 2651 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 94% | 54,302 psi | 89% | 2756 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,698 psi | 67% | 2559 fps | 96.7% |
| Lovex S065 | <<locked>> | 84% | 55,085 psi | 90% | 2631 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 53,229 psi | 87% | 2628 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 54,070 psi | 89% | 2651 fps | 100% |
| Norma 204 | <<locked>> | 84% | 51,866 psi | 85% | 2648 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 40,828 psi | 67% | 2585 fps | 98.8% |
| Norma MRP | <<locked>> | 90% | 52,518 psi | 86% | 2736 fps | 100% |
| Norma URP | <<locked>> | 84% | 52,634 psi | 86% | 2644 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,998 psi | 90% | 2776 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 55,013 psi | 90% | 2700 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 53,258 psi | 87% | 2713 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,072 psi | 63% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,230 psi | 89% | 2684 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 52,272 psi | 86% | 2707 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 52,779 psi | 87% | 2815 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,532 psi | 85% | 2766 fps | 98.1% |
| Rottweil R 904 | <<locked>> | 88% | 52,634 psi | 86% | 2638 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 90% | 54,027 psi | 89% | 2697 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 53,011 psi | 87% | 2612 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,085 psi | 90% | 2631 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 53,229 psi | 87% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,230 psi | 89% | 2589 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 53,606 psi | 88% | 2694 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 53,838 psi | 88% | 2628 fps | 98.4% |
| Somchem S365 | <<locked>> | 86% | 53,098 psi | 87% | 2648 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,607 psi | 90% | 2674 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,114 psi | 90% | 2579 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,375 psi | 89% | 2638 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,041 psi | 89% | 2654 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 53,577 psi | 88% | 2641 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 52,924 psi | 87% | 2671 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 52,388 psi | 86% | 2733 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 96% | 52,286 psi | 86% | 2717 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,591 psi | 86% | 2769 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 53,679 psi | 88% | 2598 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 52,359 psi | 86% | 2661 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 51,808 psi | 85% | 2769 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,273 psi | 89% | 2667 fps | 99.6% |
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% | 35,375 psi | 58% | 2329 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 47,297 psi | 78% | 2559 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 38,334 psi | 63% | 2484 fps | 95.6% |
| Accurate MAGPRO | 84 gr | 84% | 41,698 psi | 68% | 2543 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 39,363 psi | 65% | 2448 fps | 97% |
| ADI AR 2213 | <<locked>> | 82% | 37,550 psi | 62% | 2434 fps | 95% |
| ADI AR 2217 | <<locked>> | 92% | 38,798 psi | 64% | 2461 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 88% | 30,647 psi | 50% | 2313 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,769 psi | 65% | 2448 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,368 psi | 74% | 2566 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,407 psi | 65% | 2444 fps | 97.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,201 psi | 58% | 2388 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,026 psi | 56% | 2356 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,559 psi | 49% | 2274 fps | 97% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,318 psi | 61% | 2490 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 48,022 psi | 79% | 2579 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 35,172 psi | 58% | 2385 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 37,695 psi | 62% | 2474 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 35,201 psi | 58% | 2388 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 49,705 psi | 82% | 2559 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 88% | 37,115 psi | 61% | 2428 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 48,892 psi | 80% | 2608 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 51,271 psi | 84% | 2618 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 40,059 psi | 66% | 2441 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 82% | 39,349 psi | 65% | 2428 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,801 psi | 70% | 2454 fps | 100% |
| Hodgdon Retumbo | 79.4 gr | 84% | 32,895 psi | 54% | 2402 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 48,530 psi | 80% | 2635 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 46% | 1493 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,150 psi | 74% | 2500 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,024 psi | 84% | 2582 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 44,904 psi | 74% | 2510 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,233 psi | 64% | 2392 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 84% | 38,667 psi | 63% | 2470 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 98% | 38,043 psi | 62% | 2503 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 48,675 psi | 80% | 2536 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,007 psi | 77% | 2530 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 30,530 psi | 50% | 2218 fps | 96.7% |
| Norma 204 | <<locked>> | 80% | 45,295 psi | 74% | 2539 fps | 98.3% |
| Norma 217 | <<locked>> | 92% | 31,343 psi | 51% | 2362 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 36,927 psi | 61% | 2454 fps | 97.8% |
| Norma URP | <<locked>> | 80% | 46,296 psi | 76% | 2546 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 38,319 psi | 63% | 2477 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 45,165 psi | 74% | 2546 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 31,879 psi | 52% | 2310 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 47% | 1529 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,181 psi | 77% | 2579 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,339 psi | 74% | 2595 fps | 100% |
| ReloadSwiss RS 76 | 85 gr | 84% | 31,937 psi | 52% | 2379 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 41,162 psi | 68% | 2579 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 40,785 psi | 67% | 2428 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 80% | 38,870 psi | 64% | 2431 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 80% | 49,705 psi | 82% | 2559 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,675 psi | 80% | 2536 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,007 psi | 77% | 2530 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,630 psi | 78% | 2490 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,537 psi | 63% | 2428 fps | 97% |
| Somchem S361 | <<locked>> | 80% | 41,350 psi | 68% | 2418 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 43,395 psi | 71% | 2503 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,291 psi | 65% | 2411 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 80% | 51,677 psi | 85% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,703 psi | 78% | 2539 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,084 psi | 56% | 2297 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 47,108 psi | 77% | 2546 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,218 psi | 63% | 2428 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 39,813 psi | 65% | 2503 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 88% | 39,972 psi | 66% | 2493 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 94% | 42,583 psi | 70% | 2592 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,862 psi | 77% | 2503 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,066 psi | 81% | 2612 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,269 psi | 50% | 2382 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,868 psi | 59% | 2343 fps | 95.9% |
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 72 powders for .338 Lapua Mag. loaded with the .338 | 250gr | Hornady SP. Hodgdon Retumbo delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,673 fps to 2,818 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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, Accurate MAGPRO rank at the top here: for .338 Lapua Mag. with the .338 | 250gr | Hornady SP 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.