Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:180 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Case Length (l3):2.724"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:124.89 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:27"
Max. allowed Pressure:69,618 psi
Recommended Twist Rate:1:13.5
Load data in caliber .338 Lapua Mag. Ackley Improved with .338 | 180gr | Peregrine Plainsmaster (VLR-4) bullet and 116 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Ramshot Grand, Alliant Reloder-26 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 2495 | <<locked>> | 84% | 60,887 psi | 87% | 3156 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 62,830 psi | 90% | 3255 fps | 99.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,914 psi | 83% | 3241 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 61,322 psi | 88% | 3215 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 59,567 psi | 86% | 3297 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 59,567 psi | 86% | 3412 fps | 98.8% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 60,901 psi | 87% | 3412 fps | 97.9% |
| ADI APS 450 | <<locked>> | 84% | 62,482 psi | 90% | 2566 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 60,118 psi | 86% | 3261 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 61,627 psi | 89% | 3264 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 60,901 psi | 87% | 3353 fps | 99.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 58,610 psi | 84% | 3353 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,318 psi | 54% | 2959 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 62,366 psi | 90% | 3248 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 62,410 psi | 90% | 3415 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 61,061 psi | 88% | 3350 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 62,758 psi | 90% | 3287 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 62,975 psi | 90% | 3317 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 60,539 psi | 87% | 3360 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 62,497 psi | 90% | 3383 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 60,191 psi | 86% | 3340 fps | 99.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,798 psi | 83% | 3343 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,607 psi | 78% | 3258 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,181 psi | 68% | 3186 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 59,509 psi | 85% | 3419 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 60,742 psi | 87% | 3281 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,721 psi | 76% | 3255 fps | 98.5% |
| Bofors RP3 | <<locked>> | 86% | 59,886 psi | 86% | 3248 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,798 psi | 83% | 3343 fps | 99.2% |
| Bofors RP7 | <<locked>> | 90% | 59,088 psi | 85% | 3245 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,775 psi | 67% | 3120 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 86% | 60,350 psi | 87% | 3274 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 61,931 psi | 89% | 3360 fps | 100% |
| Hodgdon H4350 | <<locked>> | 90% | 61,206 psi | 88% | 3314 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 98% | 58,610 psi | 84% | 3284 fps | 97.7% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 61,612 psi | 89% | 3330 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 82% | 60,814 psi | 87% | 3268 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 60,742 psi | 87% | 3264 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 62,105 psi | 89% | 3310 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,151 psi | 66% | 3228 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 90% | 58,900 psi | 85% | 3340 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 52% | 2041 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 62,062 psi | 89% | 3268 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 61,772 psi | 89% | 3235 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 60,858 psi | 87% | 3245 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 59,843 psi | 86% | 3235 fps | 99.8% |
| IMR 4350 | <<locked>> | 94% | 60,640 psi | 87% | 3281 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 60,814 psi | 87% | 3271 fps | 99.9% |
| IMR 4831 | <<locked>> | 94% | 59,973 psi | 86% | 3284 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 60,597 psi | 87% | 3291 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 59,785 psi | 86% | 3271 fps | 98.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,825 psi | 80% | 3317 fps | 98% |
| IMR 8208 XBR | <<locked>> | 82% | 62,366 psi | 90% | 3248 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 61,032 psi | 88% | 3222 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 62,178 psi | 89% | 3225 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 61,003 psi | 88% | 3232 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 60,916 psi | 88% | 3261 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 62,671 psi | 90% | 3310 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,703 psi | 69% | 3077 fps | 99.3% |
| Norma 201 | <<locked>> | 84% | 62,366 psi | 90% | 3245 fps | 100% |
| Norma 202 | <<locked>> | 82% | 59,393 psi | 85% | 3186 fps | 100% |
| Norma 203B | <<locked>> | 86% | 62,221 psi | 89% | 3301 fps | 100% |
| Norma 204 | <<locked>> | 94% | 62,192 psi | 89% | 3346 fps | 99.4% |
| Norma MRPᴾ | <<locked>> | 100% | 62,091 psi | 89% | 3438 fps | 100% |
| Norma URP | <<locked>> | 94% | 61,902 psi | 89% | 3337 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 59,698 psi | 86% | 3274 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,681 psi | 81% | 3340 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 94% | 61,017 psi | 88% | 3340 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,604 psi | 73% | 3196 fps | 98.9% |
| Ramshot TAC | <<locked>> | 82% | 62,917 psi | 90% | 3291 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,057 psi | 53% | 2090 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 60,263 psi | 87% | 3261 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 60,669 psi | 87% | 3343 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 61,844 psi | 89% | 3369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 59,843 psi | 86% | 3320 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 62,859 psi | 90% | 3422 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,543 psi | 67% | 3225 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 82% | 62,439 psi | 90% | 3212 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 59,321 psi | 85% | 3196 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 60,133 psi | 86% | 3248 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 62,337 psi | 90% | 3317 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 98% | 59,422 psi | 85% | 3323 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 90% | 59,088 psi | 85% | 3245 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 60,916 psi | 88% | 3261 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 61,032 psi | 88% | 3222 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 61,003 psi | 88% | 3232 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 62,671 psi | 90% | 3310 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 62,105 psi | 89% | 3314 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 61,931 psi | 89% | 3268 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 62,584 psi | 90% | 3281 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 62,903 psi | 90% | 3163 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 60,640 psi | 87% | 3110 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 60,843 psi | 87% | 3212 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 58,943 psi | 85% | 3317 fps | 99.3% |
| Somchem S335 | <<locked>> | 84% | 62,656 psi | 90% | 3156 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 61,714 psi | 89% | 3245 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 59,814 psi | 86% | 3241 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 60,640 psi | 87% | 3245 fps | 98% |
| Somchem S365 | <<locked>> | 96% | 61,931 psi | 89% | 3330 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 60,060 psi | 86% | 3291 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 82% | 59,828 psi | 86% | 3087 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 59,770 psi | 86% | 3140 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 60,162 psi | 86% | 3159 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 61,424 psi | 88% | 3209 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 60,220 psi | 87% | 3268 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,709 psi | 80% | 3205 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 86% | 62,279 psi | 89% | 3209 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 59,306 psi | 85% | 3278 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 60,771 psi | 87% | 3340 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 62,047 psi | 89% | 3432 fps | 98.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,284 psi | 71% | 3189 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 60,452 psi | 87% | 3225 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 62,134 psi | 89% | 3360 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,691 psi | 73% | 3330 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 59,030 psi | 85% | 3235 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 60,684 psi | 87% | 3287 fps | 99.3% |
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 2495 | <<locked>> | 80% | 53,243 psi | 76% | 3051 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,169 psi | 74% | 3071 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 32,750 psi | 47% | 2746 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 50,488 psi | 73% | 3061 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,827 psi | 56% | 2923 fps | 98.9% |
| Accurate High Country | <<locked>> | 90% | 44,556 psi | 64% | 3133 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 94% | 48,878 psi | 70% | 3202 fps | 95.4% |
| ADI APS 450 | <<locked>> | 80% | 58,566 psi | 84% | 2507 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 56,333 psi | 81% | 3202 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 47,863 psi | 69% | 3045 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,538 psi | 58% | 2969 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 92% | 44,382 psi | 64% | 3081 fps | 95% |
| ADI AR 2225 | <<locked>> | 98% | 34,911 psi | 50% | 2890 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 58,465 psi | 84% | 3196 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,882 psi | 77% | 3287 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 40,741 psi | 59% | 2969 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,515 psi | 70% | 3071 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,750 psi | 74% | 3146 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,739 psi | 54% | 2936 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,381 psi | 62% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,292 psi | 58% | 2963 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,799 psi | 59% | 3018 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,543 psi | 40% | 2657 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,618 psi | 45% | 2795 fps | 95.6% |
| Alliant Reloder-26 | 89.6 gr | 80% | 29,704 psi | 43% | 2779 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 56,768 psi | 82% | 3222 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 40,248 psi | 58% | 3002 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 48,834 psi | 70% | 3077 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,799 psi | 59% | 3018 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,772 psi | 61% | 2943 fps | 97.1% |
| Hodgdon H1000 | <<locked>> | 98% | 43,627 psi | 63% | 3051 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,197 psi | 71% | 3094 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 41,017 psi | 59% | 2979 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 80% | 43,874 psi | 63% | 3002 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 92% | 47,572 psi | 68% | 3091 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,601 psi | 67% | 3071 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 56,971 psi | 82% | 3212 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,302 psi | 51% | 2818 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,012 psi | 78% | 3192 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,234 psi | 58% | 3084 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 40,219 psi | 58% | 2989 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 39% | 1831 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,607 psi | 78% | 3159 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 57,870 psi | 83% | 3182 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,328 psi | 72% | 3081 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,576 psi | 76% | 3114 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 38,493 psi | 55% | 2864 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,266 psi | 64% | 2979 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 37,362 psi | 54% | 2871 fps | 98.6% |
| IMR 4895 | <<locked>> | 80% | 53,098 psi | 76% | 3176 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,166 psi | 66% | 3025 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 45,295 psi | 65% | 3114 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 58,465 psi | 84% | 3196 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 57,058 psi | 82% | 3169 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 55,027 psi | 79% | 3120 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,546 psi | 73% | 3074 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,626 psi | 60% | 2920 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 39,842 psi | 57% | 2897 fps | 97.1% |
| Lovex S071 | <<locked>> | 88% | 31,850 psi | 46% | 2720 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 54,824 psi | 79% | 3136 fps | 100% |
| Norma 202 | <<locked>> | 80% | 55,811 psi | 80% | 3133 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,097 psi | 73% | 3130 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,857 psi | 59% | 2956 fps | 95.3% |
| Norma MRP | 93.5 gr | 86% | 37,217 psi | 53% | 2963 fps | 96% |
| Norma URP | <<locked>> | 80% | 38,653 psi | 56% | 2920 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 51,982 psi | 75% | 3156 fps | 100% |
| Ramshot Grand | 101.3 gr | 94% | 45,237 psi | 65% | 3123 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 37,579 psi | 54% | 2904 fps | 97.1% |
| Ramshot Magnum | <<locked>> | 92% | 37,304 psi | 54% | 2913 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 58,726 psi | 84% | 3228 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,572 psi | 40% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,313 psi | 71% | 3077 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 56,434 psi | 81% | 3278 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,122 psi | 66% | 3133 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,885 psi | 56% | 2943 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,724 psi | 54% | 2956 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,318 psi | 54% | 2995 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 80% | 58,885 psi | 85% | 3163 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 52,156 psi | 75% | 3087 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,905 psi | 66% | 3022 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,962 psi | 65% | 3012 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 86% | 39,320 psi | 56% | 2943 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,772 psi | 61% | 2943 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,626 psi | 60% | 2920 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 57,058 psi | 82% | 3169 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 50,546 psi | 73% | 3074 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,842 psi | 57% | 2897 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,369 psi | 68% | 3081 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 57,798 psi | 83% | 3209 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,868 psi | 79% | 3169 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 55,564 psi | 80% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,094 psi | 68% | 2917 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,799 psi | 59% | 2858 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,957 psi | 56% | 2933 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 55,317 psi | 79% | 3054 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 57,682 psi | 83% | 3189 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,151 psi | 66% | 3022 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,429 psi | 71% | 3058 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 35,186 psi | 51% | 2871 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,202 psi | 53% | 2858 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 56,202 psi | 81% | 3041 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,663 psi | 76% | 3041 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,910 psi | 76% | 3058 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,135 psi | 63% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,103 psi | 58% | 2917 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 39,436 psi | 57% | 2897 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 51,169 psi | 74% | 3051 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,537 psi | 57% | 2917 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 30,545 psi | 44% | 2743 fps | 97% |
| Vihtavuori N560 | <<locked>> | 92% | 46,586 psi | 67% | 3156 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 98% | 45,803 psi | 66% | 3120 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,450 psi | 57% | 2881 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,147 psi | 59% | 2982 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,265 psi | 35% | 2618 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,303 psi | 79% | 3179 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,334 psi | 56% | 2900 fps | 95% |
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 116 powders for .338 Lapua Mag. Ackley Improved loaded with the .338 | 180gr | Peregrine Plainsmaster (VLR-4). Norma MRP delivers the highest muzzle velocity at 3,438 fps; across all powders the maximum-charge window runs from 2,041 fps to 3,438 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.338" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. Ramshot Grand, Alliant Reloder-26, Norma MRP rank at the top here: for .338 Lapua Mag. Ackley Improved with the .338 | 180gr | Peregrine Plainsmaster (VLR-4) 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.