Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 220gr | Atomic 29 HP bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Alliant Reloder-26 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>> | 96% | 53,229 psi | 87% | 2802 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 54,940 psi | 90% | 2844 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 52,069 psi | 85% | 2890 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 82% | 53,476 psi | 88% | 2766 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 52,576 psi | 86% | 2844 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 96% | 53,751 psi | 88% | 2897 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,759 psi | 73% | 2723 fps | 96% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,653 psi | 65% | 2680 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,592 psi | 90% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 52,431 psi | 86% | 2851 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,476 psi | 88% | 2864 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 52,040 psi | 85% | 2831 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 53,330 psi | 88% | 2890 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,302 psi | 89% | 2871 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,053 psi | 82% | 2867 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,723 psi | 90% | 2959 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 52,359 psi | 86% | 2874 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,021 psi | 76% | 2795 fps | 97% |
| Bofors RP5 | <<locked>> | 96% | 53,330 psi | 88% | 2890 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 54,549 psi | 90% | 2799 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,516 psi | 81% | 2818 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 53,519 psi | 88% | 2848 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 52,924 psi | 87% | 2805 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 53,896 psi | 88% | 2841 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,765 psi | 87% | 2822 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 52,736 psi | 87% | 2776 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,139 psi | 81% | 2920 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 53,708 psi | 88% | 2881 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,753 psi | 60% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,663 psi | 86% | 2782 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,881 psi | 87% | 2772 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 52,011 psi | 85% | 2789 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 51,880 psi | 85% | 2776 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 96% | 51,430 psi | 84% | 2871 fps | 97.6% |
| Lovex S065 | <<locked>> | 86% | 53,156 psi | 87% | 2769 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,505 psi | 89% | 2812 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,763 psi | 83% | 2766 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 53,359 psi | 88% | 2835 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 53,026 psi | 87% | 2913 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 53,722 psi | 88% | 2831 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 51,808 psi | 85% | 2887 fps | 98% |
| Ramshot Hunter | <<locked>> | 88% | 52,707 psi | 87% | 2835 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,882 psi | 88% | 2884 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 61% | 1821 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,866 psi | 87% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,071 psi | 90% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,534 psi | 88% | 2897 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,429 psi | 81% | 2917 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 82% | 52,025 psi | 85% | 2749 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,998 psi | 89% | 2815 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 55,013 psi | 90% | 2874 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 54,549 psi | 90% | 2799 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,156 psi | 87% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,505 psi | 89% | 2812 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,693 psi | 88% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,649 psi | 86% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 52,402 psi | 86% | 2720 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,563 psi | 90% | 2871 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 51,909 psi | 85% | 2746 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,924 psi | 85% | 2749 fps | 96.9% |
| Somchem S365 | <<locked>> | 90% | 53,737 psi | 88% | 2835 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 51,880 psi | 85% | 2792 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 53,229 psi | 87% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 52,083 psi | 86% | 2772 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,853 psi | 90% | 2825 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 54,897 psi | 90% | 2831 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,997 psi | 87% | 2844 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 53,113 psi | 87% | 2907 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,417 psi | 86% | 2877 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 51,677 psi | 85% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,693 psi | 88% | 2848 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 50,966 psi | 84% | 2943 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 51,851 psi | 85% | 2789 fps | 98.5% |
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% | 30,472 psi | 50% | 2356 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 41,524 psi | 68% | 2621 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 48,443 psi | 80% | 2825 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 50,270 psi | 83% | 2717 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,103 psi | 66% | 2608 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 43,859 psi | 72% | 2717 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 98% | 41,814 psi | 69% | 2661 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 34,650 psi | 57% | 2552 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,155 psi | 84% | 2736 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,161 psi | 66% | 2631 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,238 psi | 76% | 2753 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,929 psi | 66% | 2602 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,797 psi | 62% | 2595 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,530 psi | 48% | 2392 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,457 psi | 48% | 2402 fps | 95% |
| Alliant Reloder-26 | 81.8 gr | 80% | 31,865 psi | 52% | 2510 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 40,089 psi | 66% | 2644 fps | 95.8% |
| Bofors RP30 | <<locked>> | 96% | 39,929 psi | 66% | 2671 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 37,797 psi | 62% | 2595 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 45,034 psi | 74% | 2635 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 40,118 psi | 66% | 2631 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 43,598 psi | 72% | 2671 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 46,325 psi | 76% | 2690 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 46,876 psi | 77% | 2720 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,050 psi | 76% | 2703 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,695 psi | 62% | 2520 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,463 psi | 62% | 2661 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 42,830 psi | 70% | 2690 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 45% | 1588 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,625 psi | 67% | 2566 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,557 psi | 76% | 2664 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 39,755 psi | 65% | 2572 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,643 psi | 75% | 2664 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 44,846 psi | 74% | 2749 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 43,976 psi | 72% | 2612 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 42,192 psi | 69% | 2595 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 31,966 psi | 52% | 2395 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 40,379 psi | 66% | 2595 fps | 95.7% |
| Norma MRP | <<locked>> | 82% | 34,374 psi | 56% | 2539 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 41,191 psi | 68% | 2615 fps | 99.5% |
| Ramshot Grand | 88.6 gr | 90% | 41,611 psi | 68% | 2690 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,030 psi | 66% | 2605 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 36,985 psi | 61% | 2569 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,891 psi | 46% | 1627 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,110 psi | 81% | 2799 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,626 psi | 68% | 2641 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,103 psi | 66% | 2654 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,345 psi | 56% | 2575 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 48,660 psi | 80% | 2700 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,440 psi | 73% | 2648 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 39,102 psi | 64% | 2585 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 45,034 psi | 74% | 2635 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,976 psi | 72% | 2612 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 42,192 psi | 69% | 2595 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,140 psi | 82% | 2753 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,472 psi | 81% | 2595 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,989 psi | 71% | 2559 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,754 psi | 64% | 2579 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,791 psi | 80% | 2697 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,426 psi | 75% | 2638 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 37,826 psi | 62% | 2569 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,086 psi | 61% | 2513 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 46,644 psi | 77% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,612 psi | 70% | 2615 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,608 psi | 60% | 2497 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 42,003 psi | 69% | 2615 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,895 psi | 54% | 2464 fps | 98.3% |
| Vihtavuori N560 | 89.4 gr | 90% | 46,224 psi | 76% | 2782 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 42,554 psi | 70% | 2697 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,713 psi | 68% | 2579 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,714 psi | 72% | 2677 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,005 psi | 43% | 2375 fps | 97.8% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,001 psi | 64% | 2552 fps | 95.4% |
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 79 powders for .338 Lapua Mag. loaded with the .338 | 220gr | Atomic 29 HP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,959 fps; across all powders the maximum-charge window runs from 1,778 fps to 2,959 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.338" calls for a 1:14.0 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. Vihtavuori N560, Alliant Reloder-26, Ramshot Grand rank at the top here: for .338 Lapua Mag. with the .338 | 220gr | Atomic 29 HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, ReloadSwiss RS 80 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.