Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 250gr | Lapua Scenar 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, Winchester StaBALL HD and ReloadSwiss RS 76.
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% | 52,634 psi | 86% | 2631 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,041 psi | 89% | 2661 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 53,983 psi | 89% | 2772 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 92% | 54,897 psi | 90% | 2776 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 90% | 54,636 psi | 90% | 2713 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 92% | 52,417 psi | 86% | 2720 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,299 psi | 83% | 2680 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,846 psi | 74% | 2648 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,955 psi | 90% | 2713 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,839 psi | 90% | 2710 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,302 psi | 89% | 2703 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 52,591 psi | 86% | 2717 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 53,795 psi | 88% | 2690 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 53,156 psi | 87% | 2749 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 53,983 psi | 89% | 2772 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,172 psi | 89% | 2684 fps | 96.6% |
| Bofors RP15 | <<locked>> | 94% | 51,837 psi | 85% | 2703 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,620 psi | 86% | 2746 fps | 99.3% |
| Bofors RP5 | <<locked>> | 92% | 52,591 psi | 86% | 2717 fps | 99.6% |
| Bofors RP7 | <<locked>> | 82% | 52,823 psi | 87% | 2608 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 98% | 51,866 psi | 85% | 2707 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 82% | 52,040 psi | 85% | 2657 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 54,505 psi | 89% | 2667 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 90% | 52,286 psi | 86% | 2661 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,911 psi | 90% | 2700 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 51,721 psi | 85% | 2592 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 52,098 psi | 86% | 2815 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 51,924 psi | 85% | 2687 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 61% | 1670 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,346 psi | 89% | 2648 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,201 psi | 89% | 2631 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,317 psi | 89% | 2651 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 53,505 psi | 88% | 2648 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 94% | 54,027 psi | 89% | 2753 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,495 psi | 66% | 2556 fps | 96.7% |
| Lovex S065 | <<locked>> | 84% | 54,752 psi | 90% | 2628 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 53,084 psi | 87% | 2625 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 53,940 psi | 89% | 2651 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,114 psi | 90% | 2700 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 40,567 psi | 67% | 2579 fps | 98.8% |
| Norma MRP | <<locked>> | 90% | 52,214 psi | 86% | 2733 fps | 100% |
| Norma URP | <<locked>> | 84% | 52,504 psi | 86% | 2644 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,665 psi | 90% | 2776 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 54,679 psi | 90% | 2697 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 52,968 psi | 87% | 2710 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,116 psi | 63% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 53,911 psi | 89% | 2680 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 52,141 psi | 86% | 2707 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 52,272 psi | 86% | 2808 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,271 psi | 84% | 2762 fps | 98% |
| Rottweil R 904 | <<locked>> | 88% | 52,330 psi | 86% | 2631 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 90% | 53,693 psi | 88% | 2694 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 82% | 52,823 psi | 87% | 2608 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,752 psi | 90% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 53,084 psi | 87% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 53,925 psi | 89% | 2585 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 53,287 psi | 87% | 2687 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 53,737 psi | 88% | 2628 fps | 98.4% |
| Somchem S365 | <<locked>> | 86% | 52,910 psi | 87% | 2644 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,273 psi | 89% | 2667 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 54,795 psi | 90% | 2572 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,230 psi | 89% | 2635 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 53,737 psi | 88% | 2651 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 53,417 psi | 88% | 2641 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 52,562 psi | 86% | 2667 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 52,054 psi | 85% | 2726 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 96% | 51,982 psi | 85% | 2713 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,330 psi | 86% | 2766 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 53,359 psi | 88% | 2595 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 52,214 psi | 86% | 2661 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 51,401 psi | 84% | 2766 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 53,998 psi | 89% | 2664 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% | 35,230 psi | 58% | 2326 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 47,094 psi | 77% | 2556 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 38,159 psi | 63% | 2480 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 84% | 41,408 psi | 68% | 2539 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 39,233 psi | 64% | 2444 fps | 97% |
| ADI AR 2213 | <<locked>> | 84% | 40,030 psi | 66% | 2490 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 92% | 38,551 psi | 63% | 2457 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 88% | 30,472 psi | 50% | 2310 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,610 psi | 65% | 2444 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,150 psi | 74% | 2562 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,247 psi | 64% | 2438 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,056 psi | 58% | 2385 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,881 psi | 56% | 2352 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,443 psi | 48% | 2270 fps | 96.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,043 psi | 61% | 2484 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 47,848 psi | 79% | 2575 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 34,911 psi | 57% | 2382 fps | 95.5% |
| Bofors RP30 | <<locked>> | 90% | 37,594 psi | 62% | 2474 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 35,056 psi | 58% | 2385 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 49,516 psi | 81% | 2556 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 88% | 36,898 psi | 61% | 2425 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 48,733 psi | 80% | 2605 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 51,111 psi | 84% | 2615 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 39,943 psi | 66% | 2438 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,989 psi | 69% | 2480 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,627 psi | 70% | 2454 fps | 100% |
| Hodgdon Retumbo | 79.1 gr | 84% | 32,779 psi | 54% | 2402 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 48,211 psi | 79% | 2628 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 46% | 1493 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,991 psi | 74% | 2497 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,879 psi | 84% | 2579 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 44,759 psi | 73% | 2507 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,073 psi | 64% | 2388 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 84% | 38,551 psi | 63% | 2467 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 98% | 37,942 psi | 62% | 2500 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 48,530 psi | 80% | 2533 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 46,862 psi | 77% | 2526 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 30,342 psi | 50% | 2215 fps | 96.6% |
| Norma 204 | <<locked>> | 80% | 45,005 psi | 74% | 2533 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 31,140 psi | 51% | 2356 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 36,782 psi | 60% | 2451 fps | 97.8% |
| Norma URP | <<locked>> | 80% | 46,137 psi | 76% | 2543 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 38,189 psi | 63% | 2474 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 44,875 psi | 74% | 2543 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 31,662 psi | 52% | 2303 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 47% | 1529 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,050 psi | 77% | 2579 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,194 psi | 74% | 2595 fps | 100% |
| ReloadSwiss RS 76 | 84.6 gr | 84% | 31,720 psi | 52% | 2375 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 40,944 psi | 67% | 2575 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 40,495 psi | 66% | 2425 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 80% | 38,580 psi | 63% | 2428 fps | 97% |
| Rottweil R 907 | <<locked>> | 80% | 49,516 psi | 81% | 2556 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,530 psi | 80% | 2533 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 46,862 psi | 77% | 2526 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,500 psi | 78% | 2487 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,247 psi | 63% | 2421 fps | 96.9% |
| Somchem S361 | <<locked>> | 80% | 41,234 psi | 68% | 2415 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 43,207 psi | 71% | 2503 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,175 psi | 64% | 2411 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 80% | 51,474 psi | 85% | 2530 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,558 psi | 78% | 2536 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,968 psi | 56% | 2293 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 46,818 psi | 77% | 2539 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,942 psi | 62% | 2421 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 39,508 psi | 65% | 2497 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 88% | 39,682 psi | 65% | 2490 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 94% | 42,337 psi | 70% | 2589 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,557 psi | 76% | 2500 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,733 psi | 80% | 2605 fps | 99.8% |
| Winchester StaBALL HD | 77.3 gr | 80% | 30,037 psi | 49% | 2375 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,737 psi | 59% | 2339 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 | Lapua Scenar. Hodgdon Retumbo delivers the highest muzzle velocity at 2,815 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,815 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 1:12.5 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, Winchester StaBALL HD, ReloadSwiss RS 76 rank at the top here: for .338 Lapua Mag. with the .338 | 250gr | Lapua Scenar 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.