Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 225gr | Frontier BTSP bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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% | 53,272 psi | 87% | 2766 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 54,984 psi | 90% | 2805 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 51,677 psi | 85% | 2844 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 82% | 53,359 psi | 88% | 2720 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 52,214 psi | 86% | 2799 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 53,548 psi | 88% | 2854 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,672 psi | 73% | 2684 fps | 96% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,610 psi | 65% | 2641 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,476 psi | 89% | 2743 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 52,243 psi | 86% | 2808 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,229 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 51,924 psi | 85% | 2789 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 53,127 psi | 87% | 2851 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,940 psi | 89% | 2828 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,835 psi | 82% | 2825 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,259 psi | 89% | 2913 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 52,156 psi | 86% | 2835 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,774 psi | 75% | 2753 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 53,127 psi | 87% | 2851 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 54,520 psi | 90% | 2756 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,240 psi | 81% | 2772 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 53,243 psi | 87% | 2802 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 52,765 psi | 87% | 2762 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 53,577 psi | 88% | 2795 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,402 psi | 86% | 2776 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 52,736 psi | 87% | 2736 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,849 psi | 80% | 2877 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 53,345 psi | 88% | 2835 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 60% | 1745 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,489 psi | 86% | 2740 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,808 psi | 87% | 2730 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 51,967 psi | 85% | 2746 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,926 psi | 90% | 2782 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 54,868 psi | 90% | 2887 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 53,156 psi | 87% | 2730 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,621 psi | 90% | 2772 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,792 psi | 83% | 2730 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 53,026 psi | 87% | 2789 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 52,634 psi | 86% | 2871 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 53,737 psi | 88% | 2792 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 51,576 psi | 85% | 2844 fps | 98% |
| Ramshot Hunter | <<locked>> | 88% | 52,359 psi | 86% | 2789 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,563 psi | 88% | 2841 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,579 psi | 62% | 1785 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,649 psi | 86% | 2812 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,013 psi | 90% | 2828 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,258 psi | 87% | 2854 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,023 psi | 80% | 2871 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 82% | 52,112 psi | 86% | 2710 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,809 psi | 88% | 2772 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 54,766 psi | 90% | 2835 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 54,520 psi | 90% | 2756 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,156 psi | 87% | 2730 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,621 psi | 90% | 2772 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,577 psi | 88% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,707 psi | 87% | 2598 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 52,518 psi | 86% | 2680 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,331 psi | 89% | 2828 fps | 99% |
| Somchem S355 | <<locked>> | 82% | 52,054 psi | 85% | 2707 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,764 psi | 85% | 2710 fps | 96.8% |
| Somchem S365 | <<locked>> | 90% | 53,505 psi | 88% | 2792 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 51,793 psi | 85% | 2753 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 53,113 psi | 87% | 2680 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 52,069 psi | 85% | 2733 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,752 psi | 90% | 2785 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 54,752 psi | 90% | 2789 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,866 psi | 87% | 2805 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,736 psi | 87% | 2861 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,243 psi | 86% | 2838 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,940 psi | 90% | 2743 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,432 psi | 88% | 2805 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,418 psi | 89% | 2956 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 51,619 psi | 85% | 2746 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% | 31,024 psi | 51% | 2336 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 41,887 psi | 69% | 2592 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 48,225 psi | 79% | 2785 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 50,285 psi | 83% | 2674 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,234 psi | 66% | 2575 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 90% | 43,671 psi | 72% | 2674 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 98% | 41,829 psi | 69% | 2625 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 34,853 psi | 57% | 2523 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,169 psi | 84% | 2697 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,277 psi | 66% | 2595 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,253 psi | 76% | 2713 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,089 psi | 66% | 2569 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,014 psi | 62% | 2566 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,820 psi | 49% | 2369 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,820 psi | 49% | 2382 fps | 95.3% |
| Alliant Reloder-26 | 78.6 gr | 80% | 32,198 psi | 53% | 2487 fps | 97.4% |
| Bofors RP15 | <<locked>> | 88% | 37,666 psi | 62% | 2556 fps | 95% |
| Bofors RP30 | <<locked>> | 96% | 39,958 psi | 66% | 2638 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 38,014 psi | 62% | 2566 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 45,295 psi | 74% | 2598 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 40,074 psi | 66% | 2592 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 43,656 psi | 72% | 2635 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 46,383 psi | 76% | 2651 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 46,818 psi | 77% | 2680 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,818 psi | 75% | 2664 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,898 psi | 62% | 2487 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,521 psi | 62% | 2625 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 42,786 psi | 70% | 2654 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 45% | 1558 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,741 psi | 67% | 2530 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,528 psi | 76% | 2625 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 39,987 psi | 66% | 2539 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,614 psi | 75% | 2625 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 44,730 psi | 73% | 2707 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 44,121 psi | 72% | 2575 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 42,424 psi | 70% | 2562 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 30,443 psi | 50% | 2323 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 40,451 psi | 66% | 2559 fps | 95.7% |
| Norma MRP | 78.2 gr | 82% | 34,606 psi | 57% | 2513 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 41,292 psi | 68% | 2579 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 41,568 psi | 68% | 2654 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,147 psi | 66% | 2572 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 90% | 37,014 psi | 61% | 2536 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,094 psi | 46% | 1594 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,052 psi | 81% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,684 psi | 68% | 2608 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,132 psi | 66% | 2621 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,432 psi | 57% | 2543 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 48,849 psi | 80% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 41,684 psi | 68% | 2556 fps | 95% |
| Rottweil R 905 | <<locked>> | 84% | 39,262 psi | 64% | 2552 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 45,295 psi | 74% | 2598 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,121 psi | 72% | 2575 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 42,424 psi | 70% | 2562 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,125 psi | 82% | 2717 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,414 psi | 81% | 2552 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,265 psi | 71% | 2523 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,914 psi | 64% | 2549 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,892 psi | 80% | 2657 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,353 psi | 74% | 2598 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,014 psi | 62% | 2539 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,911 psi | 57% | 2428 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 46,760 psi | 77% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,743 psi | 70% | 2579 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,811 psi | 60% | 2464 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 42,163 psi | 69% | 2579 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 33,373 psi | 55% | 2444 fps | 98.5% |
| Vihtavuori N560 | 85.8 gr | 90% | 45,948 psi | 75% | 2743 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 42,467 psi | 70% | 2661 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,771 psi | 69% | 2543 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,772 psi | 72% | 2638 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,440 psi | 43% | 2359 fps | 98.2% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,088 psi | 64% | 2520 fps | 95.5% |
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 | 225gr | Frontier BTSP. Winchester StaBALL HD delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,956 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 58–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:11.0 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .338 Lapua Mag. with the .338 | 225gr | Frontier BTSP 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.