Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 250gr | Rhino Penetrator bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Winchester StaBALL HD and IMR 7828 SSC.
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% | 51,677 psi | 85% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 53,142 psi | 87% | 2644 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 53,882 psi | 88% | 2756 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 90% | 53,693 psi | 88% | 2694 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 55,071 psi | 90% | 2753 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,371 psi | 81% | 2661 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,063 psi | 72% | 2625 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 53,925 psi | 89% | 2694 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,911 psi | 90% | 2703 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 53,403 psi | 88% | 2687 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 51,692 psi | 85% | 2697 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 52,837 psi | 87% | 2674 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 52,098 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 52,765 psi | 87% | 2753 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,461 psi | 88% | 2664 fps | 96.3% |
| Bofors RP15 | <<locked>> | 96% | 54,331 psi | 89% | 2740 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,619 psi | 85% | 2726 fps | 99.1% |
| Bofors RP5 | <<locked>> | 92% | 51,692 psi | 85% | 2697 fps | 99.4% |
| Bofors RP7 | <<locked>> | 82% | 52,083 psi | 86% | 2592 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,476 psi | 89% | 2743 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 54,723 psi | 90% | 2694 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 53,708 psi | 88% | 2651 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 55,042 psi | 90% | 2694 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,085 psi | 89% | 2684 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,273 psi | 89% | 2621 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,491 psi | 89% | 2851 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,984 psi | 90% | 2726 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 61% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 53,635 psi | 88% | 2631 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 53,432 psi | 88% | 2615 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 53,534 psi | 88% | 2638 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 52,678 psi | 86% | 2628 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 94% | 53,127 psi | 87% | 2733 fps | 98.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 39,639 psi | 65% | 2533 fps | 96.3% |
| Lovex S065 | <<locked>> | 84% | 54,172 psi | 89% | 2615 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 52,330 psi | 86% | 2608 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 53,055 psi | 87% | 2635 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,360 psi | 89% | 2684 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 39,668 psi | 65% | 2559 fps | 98.5% |
| Norma MRP | <<locked>> | 92% | 54,926 psi | 90% | 2769 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,027 psi | 90% | 2674 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,621 psi | 88% | 2753 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 53,969 psi | 89% | 2680 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 51,706 psi | 85% | 2687 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,029 psi | 62% | 1706 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 53,069 psi | 87% | 2664 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,998 psi | 90% | 2743 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 51,169 psi | 84% | 2785 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,937 psi | 82% | 2740 fps | 97.7% |
| Rottweil R 904 | <<locked>> | 90% | 54,969 psi | 90% | 2667 fps | 99% |
| Rottweil R 905 | <<locked>> | 90% | 52,982 psi | 87% | 2677 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 82% | 52,083 psi | 86% | 2592 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,172 psi | 89% | 2615 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 52,330 psi | 86% | 2608 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 53,200 psi | 87% | 2569 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 52,562 psi | 86% | 2674 fps | 99.5% |
| Somchem S361 | <<locked>> | 88% | 52,852 psi | 87% | 2608 fps | 98.2% |
| Somchem S365 | <<locked>> | 86% | 52,040 psi | 85% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 53,417 psi | 88% | 2651 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 54,157 psi | 89% | 2559 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 53,417 psi | 88% | 2621 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 52,939 psi | 87% | 2635 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 84% | 52,475 psi | 86% | 2625 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 51,779 psi | 85% | 2654 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,781 psi | 90% | 2766 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 98% | 54,578 psi | 90% | 2749 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,184 psi | 84% | 2746 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 52,518 psi | 86% | 2579 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,911 psi | 90% | 2694 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,983 psi | 89% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 53,171 psi | 87% | 2648 fps | 99.4% |
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% | 34,650 psi | 57% | 2310 fps | 98% |
| Accurate 4350 | <<locked>> | 80% | 46,398 psi | 76% | 2543 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 43,627 psi | 72% | 2579 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 38,653 psi | 63% | 2428 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 39,407 psi | 65% | 2470 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 37,898 psi | 62% | 2438 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 88% | 29,994 psi | 49% | 2290 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,280 psi | 73% | 2543 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,242 psi | 84% | 2654 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,711 psi | 64% | 2425 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,505 psi | 57% | 2369 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,257 psi | 55% | 2336 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,964 psi | 48% | 2254 fps | 96.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,289 psi | 60% | 2467 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,183 psi | 82% | 2608 fps | 95.5% |
| Bofors RP15 | <<locked>> | 82% | 34,330 psi | 56% | 2365 fps | 95.2% |
| Bofors RP30 | <<locked>> | 90% | 36,796 psi | 60% | 2451 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 34,505 psi | 57% | 2369 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 48,921 psi | 80% | 2539 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 36,216 psi | 59% | 2402 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 47,935 psi | 79% | 2589 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 50,488 psi | 83% | 2598 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 42,061 psi | 69% | 2477 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,321 psi | 68% | 2464 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,959 psi | 69% | 2438 fps | 100% |
| Hodgdon Retumbo | 79.7 gr | 86% | 34,301 psi | 56% | 2438 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 47,485 psi | 78% | 2612 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 46% | 1490 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,440 psi | 73% | 2484 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,299 psi | 83% | 2566 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 44,092 psi | 72% | 2490 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,075 psi | 67% | 2425 fps | 95.6% |
| IMR 7828 SSC | 77.8 gr | 84% | 37,898 psi | 62% | 2451 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 37,130 psi | 61% | 2477 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 47,921 psi | 79% | 2520 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 46,238 psi | 76% | 2510 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 29,921 psi | 49% | 2198 fps | 96.3% |
| Norma 204 | <<locked>> | 80% | 44,425 psi | 73% | 2520 fps | 98% |
| Norma 217 | <<locked>> | 94% | 32,619 psi | 54% | 2392 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 36,056 psi | 59% | 2431 fps | 97.5% |
| Norma URP | <<locked>> | 80% | 45,455 psi | 75% | 2530 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 37,420 psi | 61% | 2454 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 44,266 psi | 73% | 2526 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 84% | 33,330 psi | 55% | 2343 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,427 psi | 47% | 1522 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,238 psi | 76% | 2559 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,396 psi | 73% | 2579 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 31,154 psi | 51% | 2352 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,033 psi | 71% | 2615 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 39,958 psi | 66% | 2408 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 37,956 psi | 62% | 2408 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 80% | 48,921 psi | 80% | 2539 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,921 psi | 79% | 2520 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 46,238 psi | 76% | 2510 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,760 psi | 77% | 2470 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,623 psi | 62% | 2405 fps | 96.6% |
| Somchem S361 | <<locked>> | 80% | 40,654 psi | 67% | 2398 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 42,482 psi | 70% | 2487 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,595 psi | 63% | 2395 fps | 97.7% |
| Vihtavuori N150 | <<locked>> | 80% | 50,850 psi | 83% | 2516 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,891 psi | 77% | 2523 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,431 psi | 55% | 2277 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 46,195 psi | 76% | 2526 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,246 psi | 61% | 2405 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 84% | 41,611 psi | 68% | 2536 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 38,870 psi | 64% | 2470 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 96% | 44,585 psi | 73% | 2628 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,861 psi | 75% | 2484 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,109 psi | 79% | 2592 fps | 99.7% |
| Winchester StaBALL HD | 76.2 gr | 80% | 29,515 psi | 48% | 2359 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,230 psi | 58% | 2326 fps | 95.6% |
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 71 powders for .338 Lapua Mag. loaded with the .338 | 250gr | Rhino Penetrator. Hodgdon Retumbo delivers the highest muzzle velocity at 2,851 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,851 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 1:13.0 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, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for .338 Lapua Mag. with the .338 | 250gr | Rhino Penetrator 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.