Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 250gr | RWS Speed Tip Professional bullet and 71 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 Ramshot Grand.
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% | 54,230 psi | 89% | 2644 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 51,996 psi | 85% | 2621 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 52,605 psi | 86% | 2730 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 52,736 psi | 87% | 2674 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 54,027 psi | 89% | 2733 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,501 psi | 80% | 2638 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,076 psi | 71% | 2602 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 53,113 psi | 87% | 2677 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 52,982 psi | 87% | 2677 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,954 psi | 89% | 2690 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 52,489 psi | 86% | 2667 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 53,998 psi | 89% | 2730 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 51,822 psi | 85% | 2657 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,534 psi | 90% | 2762 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 51,547 psi | 85% | 2733 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,562 psi | 86% | 2644 fps | 95.9% |
| Bofors RP15 | <<locked>> | 96% | 53,214 psi | 87% | 2717 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,328 psi | 83% | 2703 fps | 98.8% |
| Bofors RP5 | <<locked>> | 94% | 53,998 psi | 89% | 2730 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 54,563 psi | 90% | 2625 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,330 psi | 88% | 2720 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 53,708 psi | 88% | 2674 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 52,910 psi | 87% | 2635 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 54,012 psi | 89% | 2674 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 52,997 psi | 87% | 2661 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 53,417 psi | 88% | 2608 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,258 psi | 87% | 2825 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 53,867 psi | 88% | 2710 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,014 psi | 61% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 52,707 psi | 87% | 2612 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 52,649 psi | 86% | 2595 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 52,460 psi | 86% | 2618 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 51,851 psi | 85% | 2612 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 94% | 52,011 psi | 85% | 2713 fps | 98.7% |
| Lovex S065 | <<locked>> | 84% | 53,330 psi | 88% | 2598 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,810 psi | 90% | 2641 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 51,895 psi | 85% | 2615 fps | 100% |
| Norma 204 | <<locked>> | 86% | 53,403 psi | 88% | 2664 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 38,783 psi | 64% | 2536 fps | 98.2% |
| Norma MRP | <<locked>> | 92% | 53,766 psi | 88% | 2749 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,157 psi | 89% | 2657 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 52,460 psi | 86% | 2730 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 52,997 psi | 87% | 2664 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,621 psi | 90% | 2726 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,869 psi | 62% | 1696 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 52,040 psi | 85% | 2648 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,780 psi | 88% | 2723 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,809 psi | 88% | 2825 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,660 psi | 80% | 2713 fps | 97.3% |
| Rottweil R 904 | <<locked>> | 90% | 54,070 psi | 89% | 2648 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 90% | 52,011 psi | 85% | 2657 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 54,563 psi | 90% | 2625 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 53,330 psi | 88% | 2598 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,810 psi | 90% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 52,446 psi | 86% | 2552 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,056 psi | 90% | 2707 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 52,069 psi | 85% | 2592 fps | 97.9% |
| Somchem S365 | <<locked>> | 88% | 54,418 psi | 89% | 2661 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 52,504 psi | 86% | 2635 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 53,258 psi | 87% | 2546 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 52,388 psi | 86% | 2602 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 51,880 psi | 85% | 2615 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 54,998 psi | 90% | 2654 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,085 psi | 89% | 2680 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 53,679 psi | 88% | 2746 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 53,330 psi | 88% | 2726 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,053 psi | 82% | 2723 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 51,619 psi | 85% | 2562 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 53,896 psi | 88% | 2677 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 52,562 psi | 86% | 2779 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,098 psi | 86% | 2625 fps | 99.3% |
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% | 33,910 psi | 56% | 2293 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 45,498 psi | 75% | 2523 fps | 100% |
| Accurate MAGPRO | 82.9 gr | 86% | 42,728 psi | 70% | 2559 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 37,913 psi | 62% | 2408 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 38,725 psi | 64% | 2451 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 94% | 39,769 psi | 65% | 2474 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 31,285 psi | 51% | 2323 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,305 psi | 63% | 2411 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,526 psi | 71% | 2530 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,314 psi | 83% | 2638 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,956 psi | 62% | 2405 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,779 psi | 55% | 2349 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,489 psi | 53% | 2316 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,384 psi | 47% | 2234 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,520 psi | 58% | 2448 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 49,443 psi | 81% | 2592 fps | 95.1% |
| Bofors RP15 | <<locked>> | 84% | 35,926 psi | 59% | 2398 fps | 95.7% |
| Bofors RP30 | <<locked>> | 90% | 35,998 psi | 59% | 2431 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 33,779 psi | 55% | 2349 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 48,269 psi | 79% | 2526 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 38,087 psi | 63% | 2438 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 47,079 psi | 77% | 2569 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 49,661 psi | 82% | 2582 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 41,336 psi | 68% | 2461 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 40,596 psi | 67% | 2444 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,220 psi | 68% | 2425 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,692 psi | 55% | 2418 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 46,543 psi | 76% | 2595 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 46% | 1480 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,656 psi | 72% | 2464 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,472 psi | 81% | 2546 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 43,221 psi | 71% | 2474 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,379 psi | 66% | 2405 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 86% | 39,769 psi | 65% | 2487 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 47,108 psi | 77% | 2500 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,440 psi | 75% | 2493 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 29,283 psi | 48% | 2182 fps | 96% |
| Norma 204 | <<locked>> | 80% | 43,642 psi | 72% | 2500 fps | 97.8% |
| Norma 217 | <<locked>> | 94% | 31,792 psi | 52% | 2369 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 35,317 psi | 58% | 2411 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 44,599 psi | 73% | 2510 fps | 100% |
| Ramshot Grand | 80.7 gr | 86% | 39,450 psi | 65% | 2493 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 43,468 psi | 71% | 2510 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 32,764 psi | 54% | 2326 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,413 psi | 47% | 1516 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,368 psi | 74% | 2546 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,453 psi | 71% | 2559 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 30,501 psi | 50% | 2329 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 41,989 psi | 69% | 2589 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 39,363 psi | 65% | 2392 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 37,318 psi | 61% | 2392 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 80% | 48,269 psi | 79% | 2526 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,108 psi | 77% | 2500 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,440 psi | 75% | 2493 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,195 psi | 76% | 2457 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,999 psi | 61% | 2385 fps | 96.3% |
| Somchem S361 | <<locked>> | 82% | 42,728 psi | 70% | 2434 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 41,568 psi | 68% | 2470 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,840 psi | 62% | 2375 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 49,980 psi | 82% | 2500 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,035 psi | 76% | 2507 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,735 psi | 54% | 2260 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 45,426 psi | 75% | 2510 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,564 psi | 60% | 2388 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 40,872 psi | 67% | 2520 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 90% | 40,785 psi | 67% | 2507 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 96% | 43,511 psi | 71% | 2605 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,005 psi | 74% | 2467 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,253 psi | 78% | 2572 fps | 99.6% |
| Winchester StaBALL HD | 74.9 gr | 80% | 28,935 psi | 48% | 2339 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,519 psi | 57% | 2306 fps | 95.2% |
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 71 powders for .338 Lapua Mag. loaded with the .338 | 250gr | RWS Speed Tip Professional. Hodgdon Retumbo delivers the highest muzzle velocity at 2,825 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,825 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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 1:12.0 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, Ramshot Grand rank at the top here: for .338 Lapua Mag. with the .338 | 250gr | RWS Speed Tip Professional 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.