Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 250gr | Hornady BTHP bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Accurate High Country and Winchester StaBALL HD.
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% | 51,996 psi | 85% | 2621 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 53,287 psi | 87% | 2648 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 53,142 psi | 87% | 2756 fps | 99% |
| Accurate MAGPRO | <<locked>> | 92% | 53,983 psi | 89% | 2759 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 90% | 53,983 psi | 89% | 2700 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 92% | 51,706 psi | 85% | 2703 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,647 psi | 82% | 2667 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,266 psi | 73% | 2631 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,172 psi | 89% | 2697 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,056 psi | 89% | 2697 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,042 psi | 90% | 2707 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 53,519 psi | 88% | 2690 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 51,779 psi | 85% | 2703 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 52,968 psi | 87% | 2677 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 52,170 psi | 86% | 2733 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 53,069 psi | 87% | 2759 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,490 psi | 88% | 2667 fps | 96.3% |
| Bofors RP15 | <<locked>> | 96% | 54,404 psi | 89% | 2740 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,895 psi | 85% | 2733 fps | 99.1% |
| Bofors RP5 | <<locked>> | 92% | 51,779 psi | 85% | 2703 fps | 99.5% |
| Bofors RP7 | <<locked>> | 82% | 52,185 psi | 86% | 2595 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,752 psi | 90% | 2749 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 54,868 psi | 90% | 2697 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 53,838 psi | 88% | 2654 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 90% | 51,692 psi | 85% | 2648 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,143 psi | 89% | 2684 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,404 psi | 89% | 2625 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,737 psi | 90% | 2854 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,114 psi | 90% | 2733 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,231 psi | 61% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 53,722 psi | 88% | 2635 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 53,534 psi | 88% | 2618 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 53,621 psi | 88% | 2638 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 52,939 psi | 87% | 2635 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 94% | 53,229 psi | 87% | 2740 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 39,842 psi | 65% | 2539 fps | 96.4% |
| Lovex S065 | <<locked>> | 84% | 54,259 psi | 89% | 2618 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 52,431 psi | 86% | 2615 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 53,127 psi | 87% | 2638 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,462 psi | 89% | 2684 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 39,914 psi | 66% | 2566 fps | 98.6% |
| Norma MRP | <<locked>> | 90% | 51,372 psi | 84% | 2720 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 51,764 psi | 85% | 2628 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,693 psi | 88% | 2756 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 54,041 psi | 89% | 2687 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 51,996 psi | 85% | 2694 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,058 psi | 62% | 1709 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 53,185 psi | 87% | 2667 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 51,256 psi | 84% | 2690 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 51,445 psi | 84% | 2792 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,212 psi | 82% | 2746 fps | 97.8% |
| Rottweil R 904 | <<locked>> | 90% | 55,085 psi | 90% | 2671 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 53,055 psi | 87% | 2680 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 82% | 52,185 psi | 86% | 2595 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,259 psi | 89% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 52,431 psi | 86% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 53,287 psi | 87% | 2572 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 52,634 psi | 86% | 2677 fps | 99.5% |
| Somchem S361 | <<locked>> | 88% | 53,084 psi | 87% | 2615 fps | 98.2% |
| Somchem S365 | <<locked>> | 86% | 52,141 psi | 86% | 2635 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 53,476 psi | 88% | 2654 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 54,259 psi | 89% | 2562 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 53,548 psi | 88% | 2625 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 52,997 psi | 87% | 2635 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 84% | 52,779 psi | 87% | 2628 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 51,866 psi | 85% | 2654 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,056 psi | 90% | 2772 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 98% | 54,868 psi | 90% | 2756 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,445 psi | 84% | 2749 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 52,765 psi | 87% | 2585 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,056 psi | 90% | 2700 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,331 psi | 89% | 2805 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 53,272 psi | 87% | 2651 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% | 34,751 psi | 57% | 2313 fps | 98.1% |
| Accurate 4350 | <<locked>> | 80% | 46,528 psi | 76% | 2546 fps | 100% |
| Accurate High Country | 77.2 gr | 80% | 37,565 psi | 62% | 2464 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 86% | 43,685 psi | 72% | 2582 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 38,754 psi | 64% | 2431 fps | 96.8% |
| ADI AR 2213 | <<locked>> | 84% | 39,479 psi | 65% | 2474 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 92% | 37,985 psi | 62% | 2441 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 88% | 30,081 psi | 49% | 2293 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,160 psi | 64% | 2434 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,396 psi | 73% | 2549 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,416 psi | 84% | 2657 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,798 psi | 64% | 2428 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,592 psi | 57% | 2372 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,359 psi | 55% | 2343 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,051 psi | 48% | 2257 fps | 96.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,405 psi | 60% | 2470 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,401 psi | 83% | 2615 fps | 95.6% |
| Bofors RP15 | <<locked>> | 82% | 34,447 psi | 57% | 2369 fps | 95.3% |
| Bofors RP30 | <<locked>> | 90% | 36,883 psi | 61% | 2457 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 34,592 psi | 57% | 2372 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 49,037 psi | 81% | 2546 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 36,419 psi | 60% | 2408 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 48,037 psi | 79% | 2592 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 50,633 psi | 83% | 2605 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 42,163 psi | 69% | 2480 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,408 psi | 68% | 2464 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,061 psi | 69% | 2441 fps | 100% |
| Hodgdon Retumbo | 80 gr | 86% | 34,505 psi | 57% | 2448 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 47,601 psi | 78% | 2615 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 46% | 1486 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,541 psi | 73% | 2487 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,415 psi | 83% | 2569 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 44,193 psi | 73% | 2493 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,162 psi | 68% | 2428 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 84% | 38,000 psi | 62% | 2454 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 98% | 37,188 psi | 61% | 2480 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 48,037 psi | 79% | 2523 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 46,340 psi | 76% | 2516 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 30,008 psi | 49% | 2205 fps | 96.4% |
| Norma 204 | <<locked>> | 80% | 44,527 psi | 73% | 2523 fps | 98.1% |
| Norma 217 | <<locked>> | 94% | 32,692 psi | 54% | 2398 fps | 96% |
| Norma MRP | <<locked>> | 80% | 36,172 psi | 59% | 2434 fps | 97.5% |
| Norma URP | <<locked>> | 80% | 45,571 psi | 75% | 2533 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 37,637 psi | 62% | 2461 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 44,367 psi | 73% | 2533 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 84% | 33,533 psi | 55% | 2349 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 47% | 1526 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,340 psi | 76% | 2562 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,541 psi | 73% | 2582 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 31,328 psi | 51% | 2359 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,221 psi | 71% | 2618 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 40,059 psi | 66% | 2411 fps | 96% |
| Rottweil R 905 | <<locked>> | 80% | 38,058 psi | 62% | 2415 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 80% | 49,037 psi | 81% | 2546 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,037 psi | 79% | 2523 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 46,340 psi | 76% | 2516 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,862 psi | 77% | 2474 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,739 psi | 62% | 2408 fps | 96.6% |
| Somchem S361 | <<locked>> | 80% | 40,712 psi | 67% | 2402 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 42,641 psi | 70% | 2490 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,682 psi | 64% | 2398 fps | 97.7% |
| Vihtavuori N150 | <<locked>> | 80% | 50,966 psi | 84% | 2520 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,007 psi | 77% | 2526 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,518 psi | 55% | 2283 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 46,354 psi | 76% | 2530 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,362 psi | 61% | 2408 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 38,928 psi | 64% | 2480 fps | 95% |
| Vihtavuori N565 | <<locked>> | 88% | 39,102 psi | 64% | 2477 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 96% | 44,628 psi | 73% | 2631 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,963 psi | 75% | 2487 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,211 psi | 79% | 2595 fps | 99.7% |
| Winchester StaBALL HD | 76.4 gr | 80% | 29,631 psi | 49% | 2362 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,317 psi | 58% | 2329 fps | 95.7% |
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 73 powders for .338 Lapua Mag. loaded with the .338 | 250gr | Hornady BTHP. Hodgdon Retumbo delivers the highest muzzle velocity at 2,854 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,854 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 1:12.5 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, Accurate High Country, Winchester StaBALL HD rank at the top here: for .338 Lapua Mag. with the .338 | 250gr | Hornady BTHP 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.