Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 250gr | Nosler Partition Gold bullet and 68 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 Vihtavuori N560.
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% | 53,722 psi | 88% | 2648 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,940 psi | 90% | 2674 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 52,243 psi | 86% | 2736 fps | 98% |
| ADI AR 2209 | <<locked>> | 88% | 52,011 psi | 85% | 2677 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 92% | 53,490 psi | 88% | 2736 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,329 psi | 84% | 2700 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,832 psi | 75% | 2667 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 52,373 psi | 86% | 2677 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 51,779 psi | 85% | 2667 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 53,664 psi | 88% | 2736 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,984 psi | 90% | 2707 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,215 psi | 89% | 2762 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 51,329 psi | 84% | 2736 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,056 psi | 90% | 2700 fps | 96.9% |
| Bofors RP15 | <<locked>> | 94% | 52,721 psi | 87% | 2720 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,867 psi | 88% | 2766 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 53,664 psi | 88% | 2736 fps | 99.7% |
| Bofors RP7 | <<locked>> | 82% | 53,461 psi | 88% | 2621 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 52,808 psi | 87% | 2726 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 82% | 52,852 psi | 87% | 2674 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 53,301 psi | 88% | 2677 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 52,199 psi | 86% | 2661 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 52,591 psi | 86% | 2605 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 53,098 psi | 87% | 2835 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 53,040 psi | 87% | 2707 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 61% | 1680 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,085 psi | 90% | 2661 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,810 psi | 90% | 2641 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 51,895 psi | 85% | 2618 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,302 psi | 89% | 2661 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 94% | 55,114 psi | 90% | 2772 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,365 psi | 68% | 2575 fps | 97% |
| Lovex S065 | <<locked>> | 82% | 52,359 psi | 86% | 2595 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 53,853 psi | 88% | 2641 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 54,868 psi | 90% | 2664 fps | 100% |
| Norma 204 | <<locked>> | 84% | 52,489 psi | 86% | 2661 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 41,655 psi | 68% | 2602 fps | 99% |
| Norma MRP | <<locked>> | 90% | 53,345 psi | 88% | 2753 fps | 100% |
| Norma URP | <<locked>> | 84% | 53,330 psi | 88% | 2657 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 51,851 psi | 85% | 2733 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 84% | 52,214 psi | 86% | 2664 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,201 psi | 89% | 2730 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,116 psi | 63% | 1719 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,853 psi | 90% | 2697 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 53,127 psi | 87% | 2720 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 53,606 psi | 88% | 2831 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,562 psi | 86% | 2785 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 88% | 53,243 psi | 87% | 2651 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 90% | 54,636 psi | 90% | 2710 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 53,461 psi | 88% | 2621 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 52,359 psi | 86% | 2595 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 53,853 psi | 88% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,781 psi | 90% | 2602 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,215 psi | 89% | 2707 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 54,650 psi | 90% | 2644 fps | 98.6% |
| Somchem S365 | <<locked>> | 86% | 53,824 psi | 88% | 2657 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 51,764 psi | 85% | 2635 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 84% | 55,056 psi | 90% | 2651 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,752 psi | 90% | 2667 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 54,186 psi | 89% | 2654 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 53,592 psi | 88% | 2680 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 53,142 psi | 87% | 2746 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 96% | 53,214 psi | 87% | 2733 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,679 psi | 88% | 2789 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,389 psi | 89% | 2608 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 53,026 psi | 87% | 2674 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 52,765 psi | 87% | 2782 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,984 psi | 90% | 2680 fps | 99.7% |
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% | 35,955 psi | 59% | 2343 fps | 98.5% |
| Accurate 4350 | <<locked>> | 80% | 48,008 psi | 79% | 2572 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 42,250 psi | 69% | 2556 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 39,958 psi | 66% | 2461 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 38,058 psi | 62% | 2451 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 90% | 36,854 psi | 61% | 2421 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 88% | 31,067 psi | 51% | 2329 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,919 psi | 75% | 2579 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,001 psi | 66% | 2457 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,810 psi | 59% | 2405 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,519 psi | 57% | 2365 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,037 psi | 49% | 2290 fps | 97.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,985 psi | 62% | 2503 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 48,704 psi | 80% | 2592 fps | 95.3% |
| Bofors RP15 | <<locked>> | 82% | 35,592 psi | 58% | 2398 fps | 95.9% |
| Bofors RP30 | <<locked>> | 88% | 35,897 psi | 59% | 2434 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 35,810 psi | 59% | 2405 fps | 96.1% |
| Bofors RP7 | <<locked>> | 80% | 50,343 psi | 83% | 2572 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 35,157 psi | 58% | 2385 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 49,545 psi | 81% | 2621 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 82% | 40,611 psi | 67% | 2454 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 82% | 39,914 psi | 66% | 2441 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,323 psi | 71% | 2464 fps | 100% |
| Hodgdon Retumbo | 80.4 gr | 84% | 33,373 psi | 55% | 2418 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 49,298 psi | 81% | 2648 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 46% | 1499 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,774 psi | 75% | 2513 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,648 psi | 85% | 2595 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 45,571 psi | 75% | 2523 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,755 psi | 65% | 2405 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 84% | 39,218 psi | 64% | 2487 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 36,289 psi | 60% | 2464 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,182 psi | 81% | 2546 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,485 psi | 78% | 2539 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 30,951 psi | 51% | 2231 fps | 96.9% |
| Norma 204 | <<locked>> | 80% | 45,919 psi | 75% | 2552 fps | 98.5% |
| Norma 217 | <<locked>> | 92% | 31,923 psi | 52% | 2379 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 37,536 psi | 62% | 2470 fps | 98% |
| Norma URP | <<locked>> | 80% | 46,818 psi | 77% | 2556 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 36,289 psi | 60% | 2434 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 45,803 psi | 75% | 2562 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 32,329 psi | 53% | 2323 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,645 psi | 47% | 1539 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,848 psi | 79% | 2592 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,977 psi | 75% | 2608 fps | 100% |
| ReloadSwiss RS 76 | 84 gr | 82% | 30,226 psi | 50% | 2333 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 41,916 psi | 69% | 2595 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 41,234 psi | 68% | 2441 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 80% | 39,334 psi | 65% | 2444 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 80% | 50,343 psi | 83% | 2572 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,182 psi | 81% | 2546 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,485 psi | 78% | 2539 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,037 psi | 79% | 2500 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,001 psi | 64% | 2441 fps | 97.2% |
| Somchem S361 | <<locked>> | 80% | 41,843 psi | 69% | 2431 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 44,106 psi | 72% | 2520 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,871 psi | 65% | 2428 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 80% | 48,370 psi | 79% | 2552 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,621 psi | 57% | 2310 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 47,601 psi | 78% | 2556 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,769 psi | 64% | 2438 fps | 99.9% |
| Vihtavuori N560 | 81.5 gr | 82% | 40,379 psi | 66% | 2516 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 86% | 37,927 psi | 62% | 2454 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 94% | 43,352 psi | 71% | 2608 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,427 psi | 78% | 2513 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,545 psi | 81% | 2621 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,763 psi | 51% | 2395 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,419 psi | 60% | 2356 fps | 96.2% |
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 73 powders for .338 Lapua Mag. loaded with the .338 | 250gr | Nosler Partition Gold. Hodgdon Retumbo delivers the highest muzzle velocity at 2,835 fps; across all powders the maximum-charge window runs from 1,680 fps to 2,835 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 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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, Vihtavuori N560 rank at the top here: for .338 Lapua Mag. with the .338 | 250gr | Nosler Partition Gold they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, IMR 7977 Enduron, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.