Load Specifications
Load data in caliber .338 Lapua Mag. Ackley Improved with .338 | 225gr | Ferrobull Tripple Expand Jagd bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Ramshot Grand 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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 27"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 59,190 psi | 85% | 2976 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 60,162 psi | 86% | 2999 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 61,467 psi | 88% | 3150 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 62,569 psi | 90% | 3156 fps | 99.7% |
| ADI APS 450 | <<locked>> | 82% | 61,032 psi | 88% | 2320 fps | 100% |
| ADI AR 2208 | <<locked>> | 82% | 60,292 psi | 87% | 2949 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 61,467 psi | 88% | 3077 fps | 100% |
| ADI AR 2213 | <<locked>> | 94% | 59,393 psi | 85% | 3091 fps | 99.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,359 psi | 77% | 2992 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,848 psi | 69% | 2956 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 61,467 psi | 88% | 3071 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 61,467 psi | 88% | 3071 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 62,062 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 61,438 psi | 88% | 3058 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 62,975 psi | 90% | 3071 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 60,698 psi | 87% | 3061 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,379 psi | 85% | 3081 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 96% | 60,843 psi | 87% | 3031 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 60,727 psi | 87% | 3107 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 62,221 psi | 89% | 3140 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 49,951 psi | 72% | 3009 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 60,408 psi | 87% | 3048 fps | 98.5% |
| Bofors RP15 | <<locked>> | 98% | 62,381 psi | 90% | 3123 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,333 psi | 81% | 3064 fps | 99.9% |
| Bofors RP5 | <<locked>> | 94% | 59,379 psi | 85% | 3081 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 61,931 psi | 89% | 3005 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,016 psi | 85% | 3077 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 62,091 psi | 89% | 3064 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 60,626 psi | 87% | 3022 fps | 100% |
| Hodgdon H4831 | <<locked>> | 92% | 59,001 psi | 85% | 3025 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 61,844 psi | 89% | 3064 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 61,554 psi | 88% | 2972 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 59,625 psi | 86% | 3199 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,176 psi | 85% | 3054 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 53% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 60,292 psi | 87% | 2992 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,698 psi | 86% | 2972 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 60,510 psi | 87% | 2992 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,553 psi | 86% | 2999 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 96% | 61,438 psi | 88% | 3127 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,120 psi | 62% | 2858 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 60,350 psi | 87% | 2966 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 62,526 psi | 90% | 3018 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 60,336 psi | 87% | 2989 fps | 100% |
| Norma 204 | <<locked>> | 88% | 61,888 psi | 89% | 3058 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 43,439 psi | 62% | 2884 fps | 99.7% |
| Norma MRP | <<locked>> | 92% | 59,640 psi | 86% | 3100 fps | 100% |
| Norma URP | <<locked>> | 88% | 62,410 psi | 90% | 3035 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,378 psi | 84% | 3091 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 88% | 61,366 psi | 88% | 3051 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 61,322 psi | 88% | 3077 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,014 psi | 55% | 1909 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 62,975 psi | 90% | 3009 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 62,801 psi | 90% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 60,568 psi | 87% | 3028 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,248 psi | 85% | 3061 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 61,003 psi | 88% | 3196 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,492 psi | 80% | 3087 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 82% | 59,828 psi | 86% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 62,192 psi | 89% | 3041 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 60,394 psi | 87% | 3054 fps | 100% |
| Rottweil R 907 | <<locked>> | 86% | 61,931 psi | 89% | 3005 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 86% | 60,350 psi | 87% | 2966 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 62,526 psi | 90% | 3018 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 61,627 psi | 89% | 3002 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 62,917 psi | 90% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,582 psi | 86% | 2923 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,944 psi | 86% | 3048 fps | 100% |
| Somchem S355 | <<locked>> | 82% | 59,190 psi | 85% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 60,031 psi | 86% | 2979 fps | 99.6% |
| Somchem S365 | <<locked>> | 88% | 59,466 psi | 85% | 2982 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 60,684 psi | 87% | 3018 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 60,655 psi | 87% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 60,191 psi | 86% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 60,568 psi | 87% | 3002 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 59,393 psi | 85% | 3022 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 86% | 59,422 psi | 85% | 2982 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 62,903 psi | 90% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,277 psi | 85% | 3107 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 98% | 59,219 psi | 85% | 3084 fps | 99.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,376 psi | 81% | 3091 fps | 99% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,229 psi | 76% | 3084 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 60,002 psi | 86% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 62,308 psi | 90% | 3068 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 60,031 psi | 86% | 3127 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 61,003 psi | 88% | 3018 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 27"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 36,521 psi | 52% | 2589 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 49,037 psi | 70% | 2841 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 39,972 psi | 57% | 2766 fps | 97% |
| Accurate MAGPRO | <<locked>> | 82% | 40,538 psi | 58% | 2769 fps | 95.8% |
| ADI APS 450 | <<locked>> | 80% | 59,074 psi | 85% | 2290 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 56,681 psi | 81% | 2900 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,872 psi | 59% | 2726 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 80% | 36,376 psi | 52% | 2654 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 88% | 35,331 psi | 51% | 2625 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 84% | 27,833 psi | 40% | 2461 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,307 psi | 59% | 2730 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,307 psi | 59% | 2730 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 58,305 psi | 84% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,108 psi | 68% | 2848 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,737 psi | 79% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,901 psi | 59% | 2720 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,651 psi | 53% | 2664 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,346 psi | 51% | 2618 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,487 psi | 44% | 2536 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,160 psi | 56% | 2769 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,340 psi | 67% | 2940 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 46,949 psi | 67% | 2815 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 34,026 psi | 49% | 2595 fps | 96% |
| Bofors RP30 | <<locked>> | 86% | 34,374 psi | 49% | 2635 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 36,651 psi | 53% | 2664 fps | 97.1% |
| Bofors RP7 | <<locked>> | 80% | 51,256 psi | 74% | 2844 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 33,591 psi | 48% | 2585 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,705 psi | 73% | 2894 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,156 psi | 76% | 2910 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 38,928 psi | 56% | 2664 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,189 psi | 55% | 2644 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,208 psi | 64% | 2723 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 31,879 psi | 46% | 2621 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 50,908 psi | 73% | 2930 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,804 psi | 40% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,673 psi | 67% | 2779 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,634 psi | 76% | 2867 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,470 psi | 67% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,509 psi | 58% | 2664 fps | 96.4% |
| IMR 7828 SSC | <<locked>> | 80% | 34,998 psi | 50% | 2631 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,085 psi | 50% | 2674 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 50,096 psi | 72% | 2812 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,414 psi | 70% | 2808 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 31,314 psi | 45% | 2464 fps | 97.7% |
| Norma 204 | <<locked>> | 80% | 47,007 psi | 68% | 2825 fps | 99.1% |
| Norma 217 | <<locked>> | 90% | 30,589 psi | 44% | 2575 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 38,551 psi | 55% | 2733 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 47,906 psi | 69% | 2825 fps | 100% |
| Ramshot Grand | 89.5 gr | 80% | 34,621 psi | 50% | 2635 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 46,905 psi | 67% | 2828 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,777 psi | 44% | 2513 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 41% | 1709 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 58,871 psi | 85% | 2956 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 58,407 psi | 84% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,124 psi | 71% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,529 psi | 68% | 2887 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 28,689 psi | 41% | 2520 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 37,521 psi | 54% | 2743 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 55,927 psi | 80% | 2887 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 42,032 psi | 60% | 2703 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 40,205 psi | 58% | 2707 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 80% | 51,256 psi | 74% | 2844 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,096 psi | 72% | 2812 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,414 psi | 70% | 2808 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 57,740 psi | 83% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,579 psi | 80% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,921 psi | 70% | 2762 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,871 psi | 57% | 2700 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 55,593 psi | 80% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,801 psi | 61% | 2690 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 45,179 psi | 65% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,669 psi | 58% | 2684 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 80% | 53,243 psi | 76% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,472 psi | 71% | 2818 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,317 psi | 51% | 2559 fps | 97.2% |
| Vihtavuori N170 | <<locked>> | 96% | 51,706 psi | 74% | 2897 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 48,646 psi | 70% | 2822 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,537 psi | 57% | 2694 fps | 100% |
| Vihtavuori N560 | 90.2 gr | 80% | 38,624 psi | 55% | 2723 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 84% | 36,347 psi | 52% | 2657 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 92% | 41,989 psi | 60% | 2828 fps | 96% |
| Vihtavuori N570 | <<locked>> | 96% | 45,963 psi | 66% | 2946 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,631 psi | 70% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,865 psi | 73% | 2900 fps | 100% |
| Winchester StaBALL HD | 89.3 gr | 80% | 31,850 psi | 46% | 2651 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,188 psi | 53% | 2608 fps | 97.2% |
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 86 powders for .338 Lapua Mag. Ackley Improved loaded with the .338 | 225gr | Ferrobull Tripple Expand Jagd. Hodgdon Retumbo delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,199 fps. ADI AR 2217 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 53–90 %, 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-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, Ramshot Grand, Vihtavuori N560 rank at the top here: for .338 Lapua Mag. Ackley Improved with the .338 | 225gr | Ferrobull Tripple Expand Jagd 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.