Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 230gr | Nosler CT FailSafe bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP 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>> | 94% | 53,432 psi | 88% | 2746 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,897 psi | 90% | 2782 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 51,808 psi | 85% | 2828 fps | 97.1% |
| ADI AR 2209 | <<locked>> | 90% | 51,982 psi | 85% | 2776 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 94% | 53,388 psi | 88% | 2835 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,776 psi | 78% | 2730 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,453 psi | 70% | 2690 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 52,330 psi | 86% | 2776 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 86% | 52,069 psi | 85% | 2782 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,055 psi | 87% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 51,706 psi | 85% | 2769 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 53,287 psi | 87% | 2831 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,317 psi | 89% | 2808 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,592 psi | 88% | 2861 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,636 psi | 90% | 2894 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 52,330 psi | 86% | 2815 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,574 psi | 81% | 2799 fps | 98.2% |
| Bofors RP5 | <<locked>> | 94% | 53,287 psi | 87% | 2831 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 53,954 psi | 89% | 2730 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,533 psi | 86% | 2818 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 84% | 53,026 psi | 87% | 2779 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 52,185 psi | 86% | 2736 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 92% | 53,258 psi | 87% | 2776 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 52,373 psi | 86% | 2759 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 52,620 psi | 86% | 2713 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,446 psi | 86% | 2923 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 53,113 psi | 87% | 2812 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 61% | 1745 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 51,982 psi | 85% | 2717 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 51,996 psi | 85% | 2700 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 55,114 psi | 90% | 2769 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,520 psi | 90% | 2762 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 54,781 psi | 90% | 2871 fps | 98.6% |
| Lovex S065 | <<locked>> | 84% | 52,547 psi | 86% | 2700 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,114 psi | 89% | 2746 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,375 psi | 89% | 2759 fps | 100% |
| Norma 204 | <<locked>> | 86% | 52,765 psi | 87% | 2766 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 38,087 psi | 63% | 2618 fps | 97.2% |
| Norma MRP | <<locked>> | 92% | 52,939 psi | 87% | 2851 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 53,403 psi | 88% | 2766 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 51,532 psi | 85% | 2825 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 86% | 52,272 psi | 86% | 2769 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,708 psi | 88% | 2825 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 62% | 1785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,839 psi | 90% | 2805 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 52,968 psi | 87% | 2828 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,156 psi | 87% | 2927 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,979 psi | 79% | 2805 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 55,100 psi | 90% | 2730 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 53,432 psi | 88% | 2749 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 92% | 54,563 psi | 90% | 2808 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 53,954 psi | 89% | 2730 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 52,547 psi | 86% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,114 psi | 89% | 2746 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,071 psi | 90% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 51,837 psi | 85% | 2654 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,114 psi | 89% | 2805 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 54,911 psi | 90% | 2726 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,911 psi | 90% | 2743 fps | 97.9% |
| Somchem S365 | <<locked>> | 88% | 53,534 psi | 88% | 2766 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 51,619 psi | 85% | 2730 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 82% | 52,533 psi | 86% | 2651 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 51,735 psi | 85% | 2707 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,621 psi | 90% | 2766 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 54,389 psi | 89% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 53,214 psi | 87% | 2785 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 52,895 psi | 87% | 2844 fps | 97.9% |
| Vihtavuori N565 | <<locked>> | 98% | 52,518 psi | 86% | 2822 fps | 98% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,284 psi | 81% | 2812 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,563 psi | 90% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 53,200 psi | 87% | 2782 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 51,459 psi | 84% | 2884 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,940 psi | 90% | 2779 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% | 33,330 psi | 55% | 2375 fps | 96.8% |
| Accurate 4350 | <<locked>> | 80% | 44,773 psi | 74% | 2621 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 45,078 psi | 74% | 2707 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 37,405 psi | 61% | 2497 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 86% | 40,756 psi | 67% | 2595 fps | 95% |
| ADI AR 2217 | <<locked>> | 96% | 41,771 psi | 69% | 2612 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 92% | 32,880 psi | 54% | 2457 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,739 psi | 62% | 2500 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,873 psi | 70% | 2628 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,443 psi | 81% | 2740 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,391 psi | 61% | 2493 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,058 psi | 62% | 2546 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,937 psi | 52% | 2402 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,820 psi | 49% | 2365 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,809 psi | 57% | 2530 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 37,710 psi | 62% | 2539 fps | 95.5% |
| Bofors RP30 | <<locked>> | 94% | 40,408 psi | 66% | 2628 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 38,058 psi | 62% | 2546 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 47,645 psi | 78% | 2625 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 92% | 40,147 psi | 66% | 2582 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 46,441 psi | 76% | 2667 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 48,979 psi | 80% | 2680 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 43,511 psi | 71% | 2602 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,728 psi | 70% | 2589 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,451 psi | 66% | 2516 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,273 psi | 58% | 2552 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 45,847 psi | 75% | 2690 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 46% | 1558 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,134 psi | 71% | 2559 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,979 psi | 80% | 2651 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 42,641 psi | 70% | 2569 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,380 psi | 70% | 2546 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 88% | 41,901 psi | 69% | 2631 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 46,499 psi | 76% | 2602 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 44,744 psi | 73% | 2589 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 30,589 psi | 50% | 2306 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 43,033 psi | 71% | 2592 fps | 97% |
| Norma 217 | <<locked>> | 96% | 33,330 psi | 55% | 2500 fps | 95.2% |
| Norma MRP | 79.5 gr | 80% | 34,664 psi | 57% | 2493 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 43,845 psi | 72% | 2608 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 41,582 psi | 68% | 2641 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 42,830 psi | 70% | 2605 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 34,505 psi | 57% | 2457 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 47% | 1598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,570 psi | 73% | 2638 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,772 psi | 70% | 2654 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,563 psi | 57% | 2533 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,483 psi | 73% | 2740 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 51,648 psi | 85% | 2680 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,394 psi | 68% | 2533 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 36,637 psi | 60% | 2477 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 47,645 psi | 78% | 2625 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,499 psi | 76% | 2602 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 44,744 psi | 73% | 2589 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,808 psi | 85% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,440 psi | 75% | 2549 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,303 psi | 60% | 2470 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 51,488 psi | 85% | 2677 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,991 psi | 74% | 2579 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 40,886 psi | 67% | 2569 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,231 psi | 61% | 2464 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 49,255 psi | 81% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,382 psi | 75% | 2605 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 34,447 psi | 57% | 2395 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 44,686 psi | 73% | 2605 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 35,868 psi | 59% | 2474 fps | 99.3% |
| Vihtavuori N560 | 85.4 gr | 86% | 42,902 psi | 70% | 2661 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 92% | 42,931 psi | 70% | 2651 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 98% | 45,890 psi | 75% | 2749 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,411 psi | 73% | 2569 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,441 psi | 76% | 2667 fps | 99.1% |
| Winchester StaBALL HD | 78.7 gr | 80% | 28,398 psi | 47% | 2411 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,405 psi | 60% | 2444 fps | 95.1% |
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 | 230gr | Nosler CT FailSafe. ReloadSwiss RS 76 delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,927 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 230.0 gr projectile in 0.338" calls for a 1:14.5 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, Norma MRP, Vihtavuori N560 rank at the top here: for .338 Lapua Mag. with the .338 | 230gr | Nosler CT FailSafe 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.