Load Specifications
Load data in caliber .338 Lapua Mag. Ackley Improved with .338 | 230gr | CutEdge ESP Raptor bullet and 92 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Accurate MAGPRO and Norma MRP.
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.
A valid access license is required to use the Personalized Load Calculator.
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 2700 | <<locked>> | 84% | 60,350 psi | 87% | 2887 fps | 100% |
| Accurate 3100 | <<locked>> | 96% | 59,930 psi | 86% | 2943 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 62,453 psi | 90% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 61,395 psi | 88% | 2976 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 59,915 psi | 86% | 3071 fps | 99.1% |
| ADI APS 450 | <<locked>> | 84% | 62,975 psi | 90% | 2290 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 61,975 psi | 89% | 2927 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 62,584 psi | 90% | 3048 fps | 100% |
| ADI AR 2213 | <<locked>> | 96% | 60,292 psi | 87% | 3061 fps | 99.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,372 psi | 72% | 2900 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,962 psi | 65% | 2864 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 59,683 psi | 86% | 2897 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 62,598 psi | 90% | 3028 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 59,901 psi | 86% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 61,728 psi | 89% | 3031 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 96% | 60,147 psi | 86% | 3048 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 98% | 61,409 psi | 88% | 2999 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,072 psi | 82% | 3022 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 62,917 psi | 90% | 3107 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 61,598 psi | 88% | 3015 fps | 98.5% |
| Bofors RP15ᴾ | <<locked>> | 100% | 62,990 psi | 90% | 3087 fps | 100% |
| Bofors RP3 | <<locked>> | 82% | 60,785 psi | 87% | 2913 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,794 psi | 76% | 2972 fps | 99.6% |
| Bofors RP5 | <<locked>> | 96% | 60,147 psi | 86% | 3048 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 59,625 psi | 86% | 2927 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,808 psi | 74% | 2927 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 82% | 60,829 psi | 87% | 2940 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 60,437 psi | 87% | 2999 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 60,321 psi | 87% | 2972 fps | 100% |
| Hodgdon H4831 | <<locked>> | 98% | 59,292 psi | 85% | 2982 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 62,946 psi | 90% | 3031 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 62,555 psi | 90% | 2940 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,941 psi | 80% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 60,350 psi | 87% | 3028 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,014 psi | 53% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 61,279 psi | 88% | 2910 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 60,698 psi | 87% | 2897 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 62,714 psi | 90% | 2943 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 61,627 psi | 89% | 2966 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 86% | 61,105 psi | 88% | 2946 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 62,874 psi | 90% | 2979 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 60,727 psi | 87% | 2972 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 96% | 62,685 psi | 90% | 3100 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,292 psi | 58% | 2766 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 61,641 psi | 89% | 2894 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 61,786 psi | 89% | 2940 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 59,799 psi | 86% | 2940 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,188 psi | 82% | 2907 fps | 100% |
| Norma 203B | <<locked>> | 82% | 62,729 psi | 90% | 2956 fps | 100% |
| Norma 204 | <<locked>> | 88% | 58,987 psi | 85% | 2976 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 40,480 psi | 58% | 2792 fps | 99.3% |
| Norma MRP | <<locked>> | 94% | 60,379 psi | 87% | 3071 fps | 100% |
| Norma URP | <<locked>> | 88% | 59,466 psi | 85% | 2956 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 58,407 psi | 84% | 3051 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 90% | 62,424 psi | 90% | 3022 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 59,712 psi | 86% | 3018 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 54% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 60,524 psi | 87% | 2930 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 59,611 psi | 86% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 61,670 psi | 89% | 2999 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 60,408 psi | 87% | 3038 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,739 psi | 82% | 3097 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,488 psi | 74% | 2989 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 84% | 61,032 psi | 88% | 2910 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 59,582 psi | 86% | 2959 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 94% | 61,351 psi | 88% | 3022 fps | 100% |
| Rottweil R 907 | <<locked>> | 86% | 59,625 psi | 86% | 2927 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 88% | 61,786 psi | 89% | 2940 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 61,641 psi | 89% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 59,799 psi | 86% | 2940 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 62,975 psi | 90% | 2972 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 60,611 psi | 87% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 61,148 psi | 88% | 2894 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 60,887 psi | 87% | 3018 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 60,568 psi | 87% | 2904 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 61,395 psi | 88% | 2953 fps | 99.6% |
| Somchem S365 | <<locked>> | 90% | 60,423 psi | 87% | 2956 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 61,772 psi | 89% | 2989 fps | 100% |
| Unknown powder | <<locked>> | 86% | 59,799 psi | 86% | 2963 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 62,656 psi | 90% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 60,205 psi | 86% | 2923 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 59,292 psi | 85% | 2940 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 60,669 psi | 87% | 2976 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 59,538 psi | 86% | 2976 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 60,640 psi | 87% | 3087 fps | 99.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 59,785 psi | 86% | 3051 fps | 99.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,678 psi | 76% | 2995 fps | 98.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 50,096 psi | 72% | 2986 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 61,351 psi | 88% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 60,437 psi | 87% | 2999 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 60,147 psi | 86% | 3094 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 59,756 psi | 86% | 2959 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 2700 | <<locked>> | 80% | 52,750 psi | 76% | 2779 fps | 99.9% |
| Accurate 3100 | <<locked>> | 80% | 34,534 psi | 50% | 2513 fps | 98.6% |
| Accurate 4064 | <<locked>> | 80% | 58,639 psi | 84% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 46,572 psi | 67% | 2759 fps | 100% |
| Accurate MAGPRO | 92.9 gr | 86% | 41,814 psi | 60% | 2756 fps | 95.4% |
| ADI APS 450 | <<locked>> | 80% | 58,958 psi | 85% | 2234 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 54,621 psi | 78% | 2828 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,827 psi | 56% | 2644 fps | 97.5% |
| ADI AR 2213 | <<locked>> | 82% | 37,072 psi | 53% | 2635 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 90% | 35,882 psi | 52% | 2602 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 86% | 28,181 psi | 40% | 2441 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 56,014 psi | 80% | 2848 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,889 psi | 64% | 2772 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,025 psi | 75% | 2884 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,943 psi | 56% | 2641 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,679 psi | 50% | 2582 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,315 psi | 48% | 2543 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,848 psi | 41% | 2457 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,695 psi | 53% | 2687 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 47,863 psi | 69% | 2789 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 32,213 psi | 46% | 2520 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 56,956 psi | 82% | 2864 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 34,664 psi | 50% | 2615 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 34,679 psi | 50% | 2582 fps | 96.4% |
| Bofors RP7 | <<locked>> | 80% | 49,240 psi | 71% | 2766 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 88% | 34,330 psi | 49% | 2566 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 57,043 psi | 82% | 2890 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 52,649 psi | 76% | 2887 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 46,775 psi | 67% | 2756 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 37,231 psi | 53% | 2589 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 82% | 38,899 psi | 56% | 2625 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,105 psi | 60% | 2648 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 32,271 psi | 46% | 2598 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 48,153 psi | 69% | 2844 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,731 psi | 40% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 57,493 psi | 83% | 2861 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,766 psi | 77% | 2805 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,141 psi | 75% | 2792 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,657 psi | 64% | 2700 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,676 psi | 73% | 2789 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 40,118 psi | 58% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 38,696 psi | 56% | 2585 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 80% | 35,447 psi | 51% | 2605 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 35,128 psi | 50% | 2644 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 57,899 psi | 83% | 2844 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 48,051 psi | 69% | 2736 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 46,383 psi | 67% | 2730 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 29,617 psi | 43% | 2388 fps | 97% |
| Norma 203B | <<locked>> | 80% | 58,914 psi | 85% | 2907 fps | 100% |
| Norma 204 | <<locked>> | 80% | 44,759 psi | 64% | 2743 fps | 98.7% |
| Norma 217 | <<locked>> | 92% | 30,719 psi | 44% | 2549 fps | 96.1% |
| Norma MRP | 84.8 gr | 80% | 36,303 psi | 52% | 2651 fps | 98.2% |
| Norma URP | <<locked>> | 80% | 45,759 psi | 66% | 2749 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,782 psi | 53% | 2654 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 44,599 psi | 64% | 2749 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 31,850 psi | 46% | 2510 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,311 psi | 41% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 56,724 psi | 81% | 2881 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 55,506 psi | 80% | 2923 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,702 psi | 67% | 2785 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,005 psi | 65% | 2808 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 29,182 psi | 42% | 2503 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 37,768 psi | 54% | 2720 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 53,592 psi | 77% | 2812 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,190 psi | 58% | 2625 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 38,232 psi | 55% | 2628 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 80% | 49,240 psi | 71% | 2766 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,051 psi | 69% | 2736 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 57,899 psi | 83% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 46,383 psi | 67% | 2730 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 55,187 psi | 79% | 2874 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,621 psi | 77% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,108 psi | 68% | 2687 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,898 psi | 54% | 2621 fps | 97.4% |
| Somchem S355 | <<locked>> | 80% | 53,330 psi | 77% | 2808 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 40,901 psi | 59% | 2612 fps | 96.2% |
| Somchem S365 | <<locked>> | 80% | 42,728 psi | 61% | 2703 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,711 psi | 56% | 2608 fps | 98.3% |
| Unknown powder | <<locked>> | 80% | 49,052 psi | 70% | 2802 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,919 psi | 66% | 2654 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,240 psi | 71% | 2769 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,503 psi | 47% | 2457 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 80% | 49,821 psi | 72% | 2818 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,376 psi | 54% | 2615 fps | 100% |
| Vihtavuori N560 | 85.1 gr | 82% | 37,231 psi | 53% | 2661 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 86% | 36,695 psi | 53% | 2635 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 94% | 42,293 psi | 61% | 2802 fps | 96% |
| Vihtavuori N570 | <<locked>> | 98% | 46,644 psi | 67% | 2917 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,456 psi | 67% | 2700 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,649 psi | 76% | 2887 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,486 psi | 42% | 2569 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,595 psi | 55% | 2605 fps | 97.5% |
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 97 powders for .338 Lapua Mag. Ackley Improved loaded with the .338 | 230gr | CutEdge ESP Raptor. Alliant Reloder-26 delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,107 fps. ADI AR 2217 gives the best case fill at 100 %, and 97 of the 97 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 230.0 gr projectile in 0.338" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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, Accurate MAGPRO, Norma MRP rank at the top here: for .338 Lapua Mag. Ackley Improved with the .338 | 230gr | CutEdge ESP Raptor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron 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.