Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 165gr | Impala LWHV LS bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 and ReloadSwiss RS 70.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 52,504 psi | 86% | 3051 fps | 96.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,201 psi | 89% | 3150 fps | 98.6% |
| Accurate 4064 | <<locked>> | 82% | 52,808 psi | 87% | 3084 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,649 psi | 86% | 3159 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 86% | 54,911 psi | 90% | 3143 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,722 psi | 88% | 3261 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 52,692 psi | 87% | 3120 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 52,852 psi | 87% | 3140 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,562 psi | 86% | 3212 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,635 psi | 88% | 3241 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 52,388 psi | 86% | 3169 fps | 95.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,156 psi | 87% | 3225 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,227 psi | 82% | 3173 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,266 psi | 73% | 3068 fps | 97.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,838 psi | 88% | 3307 fps | 99.6% |
| Bofors RP3 | <<locked>> | 84% | 53,722 psi | 88% | 3140 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,156 psi | 87% | 3225 fps | 96.2% |
| Bofors RP7 | <<locked>> | 88% | 52,982 psi | 87% | 3100 fps | 97% |
| Hodgdon H380 | <<locked>> | 84% | 53,722 psi | 88% | 3143 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 90% | 54,056 psi | 89% | 3199 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 88% | 53,882 psi | 88% | 3156 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,011 psi | 87% | 3140 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,520 psi | 90% | 3186 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,099 psi | 89% | 3228 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 60% | 2031 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,404 psi | 89% | 3127 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,548 psi | 88% | 3094 fps | 97.6% |
| IMR 4350 | <<locked>> | 92% | 53,388 psi | 88% | 3127 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,099 psi | 89% | 3127 fps | 97.6% |
| IMR 4831 | <<locked>> | 92% | 52,794 psi | 87% | 3146 fps | 99.5% |
| IMR 4895 | <<locked>> | 82% | 54,172 psi | 89% | 3173 fps | 99.9% |
| Lovex S062 | <<locked>> | 84% | 55,042 psi | 90% | 3130 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,723 psi | 90% | 3133 fps | 98.8% |
| Lovex S070 | <<locked>> | 90% | 52,678 psi | 86% | 3117 fps | 97.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,484 psi | 75% | 2992 fps | 96.9% |
| Norma 203B | <<locked>> | 82% | 52,185 psi | 86% | 3123 fps | 99.8% |
| Norma 204 | <<locked>> | 92% | 53,998 psi | 89% | 3176 fps | 95.9% |
| Norma MRP | <<locked>> | 98% | 52,721 psi | 87% | 3251 fps | 97.6% |
| Norma URP | <<locked>> | 92% | 54,259 psi | 89% | 3196 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 82% | 52,402 psi | 86% | 3140 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 92% | 53,098 psi | 87% | 3186 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,275 psi | 61% | 2080 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,563 psi | 88% | 3117 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,127 psi | 87% | 3241 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,011 psi | 85% | 3173 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,911 psi | 89% | 3255 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 82% | 53,853 psi | 88% | 3094 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,795 psi | 88% | 3133 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 55,042 psi | 90% | 3212 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 88% | 52,982 psi | 87% | 3100 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,723 psi | 90% | 3133 fps | 98.8% |
| Shooters World Precision | <<locked>> | 84% | 55,042 psi | 90% | 3130 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,678 psi | 86% | 3117 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,563 psi | 90% | 3186 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,259 psi | 89% | 3018 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,505 psi | 89% | 3077 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,549 psi | 90% | 3205 fps | 96.5% |
| Somchem S355 | <<locked>> | 86% | 53,650 psi | 88% | 3130 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 53,316 psi | 88% | 3202 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 52,707 psi | 87% | 3133 fps | 96.9% |
| Vihtavuori N135 | <<locked>> | 82% | 53,911 psi | 89% | 3054 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,896 psi | 88% | 3064 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,665 psi | 90% | 3100 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 52,968 psi | 87% | 3133 fps | 99.4% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,605 psi | 85% | 3097 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 82% | 52,388 psi | 86% | 3054 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,475 psi | 86% | 3136 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 98% | 52,953 psi | 87% | 3202 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,475 psi | 86% | 3097 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,215 psi | 89% | 3202 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,934 psi | 75% | 3222 fps | 100% |
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 2700 | <<locked>> | 80% | 49,269 psi | 81% | 2992 fps | 95.9% |
| Accurate 3100 | <<locked>> | 90% | 39,276 psi | 64% | 2861 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 49,734 psi | 82% | 3031 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,913 psi | 62% | 2858 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 80% | 45,934 psi | 75% | 2976 fps | 98.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,285 psi | 83% | 3199 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,659 psi | 77% | 3009 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,603 psi | 81% | 3081 fps | 99.4% |
| Alliant Reloder-16 | 75.2 gr | 80% | 36,448 psi | 60% | 2854 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,089 psi | 67% | 2995 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 49,168 psi | 81% | 3104 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 98% | 49,792 psi | 82% | 3163 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 30,966 psi | 51% | 2710 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 39,233 psi | 64% | 2946 fps | 95.5% |
| Alliant Reloder-26 | 91.3 gr | 88% | 38,087 psi | 63% | 2963 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 47,398 psi | 78% | 3028 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 49,792 psi | 82% | 3163 fps | 95.4% |
| Bofors RP7 | <<locked>> | 84% | 46,963 psi | 77% | 2986 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 47,427 psi | 78% | 3025 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 44,672 psi | 73% | 3015 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 50,589 psi | 83% | 3094 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,185 psi | 56% | 2749 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,126 psi | 84% | 3130 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 47,021 psi | 77% | 3091 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 45% | 1821 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,269 psi | 79% | 3015 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,430 psi | 83% | 3035 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 47,384 psi | 78% | 3012 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 45,281 psi | 74% | 2953 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 36,303 psi | 60% | 2802 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 50,792 psi | 83% | 3110 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 48,805 psi | 80% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,712 psi | 67% | 2851 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 44,019 psi | 72% | 2943 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 40,234 psi | 66% | 2881 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 48,994 psi | 80% | 3064 fps | 99.6% |
| Norma 204 | <<locked>> | 90% | 50,575 psi | 83% | 3110 fps | 95.1% |
| Norma MRP | <<locked>> | 94% | 46,238 psi | 76% | 3120 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 37,347 psi | 61% | 2844 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 80% | 49,124 psi | 81% | 3081 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 41,060 psi | 67% | 2940 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,876 psi | 46% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,282 psi | 78% | 2999 fps | 96.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,468 psi | 71% | 3061 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,275 psi | 61% | 2864 fps | 95.8% |
| ReloadSwiss RS 70 | 84.3 gr | 82% | 38,667 psi | 63% | 2920 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 50,865 psi | 84% | 3041 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,686 psi | 73% | 2966 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 96% | 51,648 psi | 85% | 3153 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 84% | 46,963 psi | 77% | 2986 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,712 psi | 67% | 2851 fps | 95.8% |
| Shooters World Precision | <<locked>> | 80% | 48,805 psi | 80% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 44,019 psi | 72% | 2943 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,034 psi | 74% | 3005 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,353 psi | 74% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 42,467 psi | 70% | 2848 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 51,213 psi | 84% | 3146 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 44,744 psi | 73% | 2963 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 33,939 psi | 56% | 2802 fps | 98.3% |
| Somchem S385 | <<locked>> | 92% | 46,499 psi | 76% | 3015 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 50,647 psi | 83% | 3005 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,778 psi | 83% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,743 psi | 70% | 2887 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 38,566 psi | 63% | 2841 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 98% | 48,414 psi | 79% | 3038 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 49,211 psi | 81% | 3002 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,305 psi | 63% | 2848 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 34,171 psi | 56% | 2799 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,855 psi | 62% | 2808 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 44,817 psi | 74% | 3018 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 29,573 psi | 49% | 2740 fps | 95.3% |
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 71 powders for .338 Lapua Mag. loaded with the .338 | 165gr | Impala LWHV LS. Alliant Reloder-26 delivers the highest muzzle velocity at 3,307 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,307 fps. Accurate 3100 gives the best case fill at 100 %, and 71 of the 71 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.338" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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. Alliant Reloder-26, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .338 Lapua Mag. with the .338 | 165gr | Impala LWHV LS 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.