Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 225gr | Barnes XLC S bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, ReloadSwiss RS 76 and Hodgdon Retumbo.
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% | 53,476 psi | 88% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,636 psi | 90% | 2789 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 54,636 psi | 90% | 2887 fps | 97.4% |
| ADI AR 2209 | <<locked>> | 90% | 54,244 psi | 89% | 2828 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 92% | 52,098 psi | 86% | 2828 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,256 psi | 83% | 2789 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,121 psi | 74% | 2756 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,389 psi | 89% | 2831 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,099 psi | 89% | 2822 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 52,417 psi | 86% | 2831 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 94% | 53,780 psi | 88% | 2815 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 52,794 psi | 87% | 2867 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 53,708 psi | 88% | 2894 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 54,998 psi | 90% | 2871 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,547 psi | 86% | 2861 fps | 98.5% |
| Bofors RP5 | <<locked>> | 92% | 52,417 psi | 86% | 2831 fps | 99% |
| Bofors RP7 | <<locked>> | 82% | 53,113 psi | 87% | 2726 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 98% | 51,576 psi | 85% | 2812 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 52,098 psi | 86% | 2779 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 82% | 54,389 psi | 89% | 2785 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 90% | 52,199 psi | 86% | 2769 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,534 psi | 90% | 2808 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,984 psi | 90% | 2759 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,027 psi | 90% | 2982 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 82% | 51,851 psi | 85% | 2805 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 61% | 1765 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,172 psi | 89% | 2762 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,027 psi | 89% | 2746 fps | 99.7% |
| IMR 4831 | <<locked>> | 86% | 54,520 psi | 90% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 53,388 psi | 88% | 2759 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 94% | 53,621 psi | 88% | 2864 fps | 98.3% |
| Lovex S065 | <<locked>> | 82% | 52,156 psi | 86% | 2703 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 53,548 psi | 88% | 2749 fps | 99.8% |
| Lovex S071 | <<locked>> | 98% | 54,549 psi | 90% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,940 psi | 90% | 2812 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 41,249 psi | 68% | 2697 fps | 98% |
| Norma MRP | <<locked>> | 90% | 52,112 psi | 86% | 2854 fps | 99.7% |
| Norma URP | <<locked>> | 84% | 52,692 psi | 87% | 2766 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,172 psi | 89% | 2884 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 86% | 54,592 psi | 90% | 2818 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 52,649 psi | 86% | 2825 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,218 psi | 63% | 1804 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,114 psi | 89% | 2805 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 51,866 psi | 85% | 2825 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 52,156 psi | 86% | 2923 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,111 psi | 84% | 2874 fps | 97% |
| Rottweil R 904 | <<locked>> | 88% | 52,373 psi | 86% | 2746 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 90% | 53,679 psi | 88% | 2808 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 82% | 53,113 psi | 87% | 2726 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 52,156 psi | 86% | 2703 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 53,548 psi | 88% | 2749 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,288 psi | 89% | 2703 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 53,243 psi | 87% | 2805 fps | 99% |
| Somchem S361 | <<locked>> | 88% | 53,882 psi | 88% | 2740 fps | 97.5% |
| Somchem S365 | <<locked>> | 86% | 52,968 psi | 87% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,447 psi | 89% | 2789 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 84% | 54,273 psi | 89% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 53,766 psi | 88% | 2766 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 84% | 53,606 psi | 88% | 2766 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 53,113 psi | 87% | 2795 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 51,909 psi | 85% | 2844 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 96% | 52,330 psi | 86% | 2831 fps | 97.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,170 psi | 86% | 2877 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 53,330 psi | 88% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 52,286 psi | 86% | 2779 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,607 psi | 90% | 2946 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 53,911 psi | 89% | 2779 fps | 99% |
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% | 36,825 psi | 60% | 2457 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 48,138 psi | 79% | 2687 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 44,730 psi | 73% | 2710 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 39,624 psi | 65% | 2552 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 86% | 43,178 psi | 71% | 2657 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 94% | 41,582 psi | 68% | 2618 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 90% | 33,576 psi | 55% | 2480 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,223 psi | 74% | 2684 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,827 psi | 65% | 2556 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,232 psi | 63% | 2559 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,722 psi | 57% | 2477 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,530 psi | 50% | 2388 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,884 psi | 62% | 2608 fps | 99.2% |
| Bofors RP15 | <<locked>> | 84% | 38,014 psi | 62% | 2552 fps | 95.4% |
| Bofors RP30 | <<locked>> | 92% | 40,770 psi | 67% | 2644 fps | 95.7% |
| Bofors RP5 | <<locked>> | 82% | 38,232 psi | 63% | 2559 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 49,995 psi | 82% | 2677 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 39,972 psi | 66% | 2585 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 48,834 psi | 80% | 2723 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 51,227 psi | 84% | 2733 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 45,934 psi | 75% | 2661 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,136 psi | 74% | 2644 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,091 psi | 71% | 2572 fps | 100% |
| Hodgdon Retumbo | 82.4 gr | 86% | 35,752 psi | 59% | 2572 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 48,211 psi | 79% | 2743 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 46% | 1578 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,237 psi | 74% | 2608 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,894 psi | 84% | 2694 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 45,513 psi | 75% | 2631 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,628 psi | 73% | 2602 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 86% | 41,582 psi | 68% | 2635 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,124 psi | 81% | 2654 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 47,529 psi | 78% | 2648 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 32,111 psi | 53% | 2346 fps | 96.2% |
| Norma 204 | <<locked>> | 80% | 45,295 psi | 74% | 2648 fps | 97.4% |
| Norma 217 | <<locked>> | 94% | 34,330 psi | 56% | 2530 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 37,478 psi | 62% | 2569 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 46,543 psi | 76% | 2667 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 41,394 psi | 68% | 2644 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 45,237 psi | 74% | 2661 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 84% | 34,969 psi | 57% | 2477 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,819 psi | 47% | 1617 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,514 psi | 78% | 2700 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,281 psi | 74% | 2713 fps | 99.9% |
| ReloadSwiss RS 76 | 86.2 gr | 84% | 32,938 psi | 54% | 2490 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,512 psi | 73% | 2749 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 41,104 psi | 67% | 2536 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 80% | 39,320 psi | 65% | 2543 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 80% | 49,995 psi | 82% | 2677 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,124 psi | 81% | 2654 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 47,529 psi | 78% | 2648 fps | 99.2% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,080 psi | 79% | 2605 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,986 psi | 64% | 2539 fps | 95.9% |
| Somchem S361 | <<locked>> | 82% | 44,643 psi | 73% | 2579 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 43,700 psi | 72% | 2628 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,118 psi | 66% | 2530 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 80% | 47,964 psi | 79% | 2657 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,896 psi | 57% | 2408 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 47,413 psi | 78% | 2664 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,175 psi | 64% | 2552 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 42,699 psi | 70% | 2667 fps | 95% |
| Vihtavuori N565 | <<locked>> | 90% | 43,207 psi | 71% | 2664 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 98% | 48,863 psi | 80% | 2818 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,775 psi | 77% | 2618 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,008 psi | 80% | 2723 fps | 99.3% |
| Winchester StaBALL HD | 78.7 gr | 80% | 31,227 psi | 51% | 2500 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,928 psi | 64% | 2507 fps | 95.7% |
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 | 225gr | Barnes XLC S. Hodgdon Retumbo delivers the highest muzzle velocity at 2,982 fps; across all powders the maximum-charge window runs from 1,765 fps to 2,982 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 225.0 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-33 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, ReloadSwiss RS 76, Hodgdon Retumbo rank at the top here: for .338 Lapua Mag. with the .338 | 225gr | Barnes XLC S they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, 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.