Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:185 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:1:16.5
Load data in caliber .338 Lapua Mag. Ackley Improved with .338 | 185gr | Peregrine Bushmaster (VRG-3) bullet and 112 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Ramshot Grand.
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% | 62,178 psi | 89% | 3130 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 59,814 psi | 86% | 3176 fps | 99.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 59,364 psi | 85% | 3228 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 62,642 psi | 90% | 3196 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 61,206 psi | 88% | 3281 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 61,351 psi | 88% | 3406 fps | 99.2% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 62,685 psi | 90% | 3402 fps | 98.4% |
| ADI APS 450 | <<locked>> | 84% | 62,729 psi | 90% | 2539 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 61,250 psi | 88% | 3238 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 62,758 psi | 90% | 3245 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 62,482 psi | 90% | 3343 fps | 99.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 59,944 psi | 86% | 3340 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,363 psi | 55% | 2963 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 59,408 psi | 85% | 3330 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 62,410 psi | 90% | 3333 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 60,031 psi | 86% | 3212 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 60,234 psi | 87% | 3241 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 61,960 psi | 89% | 3340 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 59,741 psi | 86% | 3304 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 61,482 psi | 88% | 3323 fps | 99.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 59,263 psi | 85% | 3330 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,028 psi | 80% | 3238 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,399 psi | 70% | 3176 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 61,496 psi | 88% | 3406 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 61,917 psi | 89% | 3261 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 58,595 psi | 84% | 3228 fps | 95.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,259 psi | 78% | 3248 fps | 98.9% |
| Bofors RP3 | <<locked>> | 86% | 61,366 psi | 88% | 3232 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,266 psi | 64% | 3091 fps | 96.4% |
| Bofors RP5ᴾ | <<locked>> | 100% | 59,263 psi | 85% | 3330 fps | 99.5% |
| Bofors RP7 | <<locked>> | 90% | 60,220 psi | 87% | 3225 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,892 psi | 69% | 3110 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 86% | 61,569 psi | 88% | 3255 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 59,248 psi | 85% | 3281 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 90% | 62,453 psi | 90% | 3297 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 98% | 60,118 psi | 86% | 3274 fps | 98.2% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 62,946 psi | 90% | 3317 fps | 98.6% |
| Hodgdon H4895 | <<locked>> | 82% | 61,975 psi | 89% | 3245 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 62,323 psi | 90% | 3245 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 59,190 psi | 85% | 3232 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,471 psi | 68% | 3228 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 90% | 60,539 psi | 87% | 3327 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,506 psi | 52% | 2018 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 59,219 psi | 85% | 3192 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 62,192 psi | 89% | 3225 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 61,090 psi | 88% | 3219 fps | 99.9% |
| IMR 4350 | <<locked>> | 94% | 61,830 psi | 89% | 3261 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 61,917 psi | 89% | 3255 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 61,351 psi | 88% | 3264 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 61,801 psi | 89% | 3268 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 61,148 psi | 88% | 3258 fps | 98.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,392 psi | 82% | 3314 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 82% | 62,294 psi | 89% | 3199 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 59,495 psi | 85% | 3150 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 62,381 psi | 90% | 3212 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 62,279 psi | 89% | 3245 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 60,118 psi | 86% | 3238 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,965 psi | 70% | 3064 fps | 99.6% |
| Norma 201 | <<locked>> | 82% | 59,698 psi | 86% | 3169 fps | 100% |
| Norma 202 | <<locked>> | 82% | 60,539 psi | 87% | 3163 fps | 100% |
| Norma 203B | <<locked>> | 84% | 59,466 psi | 85% | 3225 fps | 100% |
| Norma 204 | <<locked>> | 92% | 59,379 psi | 85% | 3268 fps | 99.3% |
| Norma MRP | <<locked>> | 98% | 59,379 psi | 85% | 3360 fps | 100% |
| Norma URP | <<locked>> | 92% | 59,335 psi | 85% | 3261 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 60,945 psi | 88% | 3251 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 58,146 psi | 84% | 3330 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 94% | 62,366 psi | 90% | 3323 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,185 psi | 75% | 3192 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,202 psi | 53% | 2064 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 61,438 psi | 88% | 3241 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 62,033 psi | 89% | 3320 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 59,103 psi | 85% | 3294 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 61,453 psi | 88% | 3304 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 59,872 psi | 86% | 3340 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,950 psi | 69% | 3225 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 84% | 60,466 psi | 87% | 3169 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 61,395 psi | 88% | 3225 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 59,698 psi | 86% | 3241 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 98% | 60,843 psi | 87% | 3310 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 90% | 60,220 psi | 87% | 3225 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 62,279 psi | 89% | 3245 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 62,294 psi | 89% | 3199 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 62,381 psi | 90% | 3212 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 60,118 psi | 86% | 3238 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 59,422 psi | 85% | 3238 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 59,828 psi | 86% | 3205 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 60,263 psi | 87% | 3091 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 61,728 psi | 89% | 3087 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 62,207 psi | 89% | 3196 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 60,350 psi | 87% | 3304 fps | 99.5% |
| Somchem S335 | <<locked>> | 82% | 59,988 psi | 86% | 3081 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 62,917 psi | 90% | 3225 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 61,017 psi | 88% | 3222 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 62,047 psi | 89% | 3235 fps | 98.4% |
| Somchem S365 | <<locked>> | 94% | 59,422 psi | 85% | 3258 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 61,409 psi | 88% | 3278 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 60,887 psi | 87% | 3064 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 60,974 psi | 88% | 3117 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 61,482 psi | 88% | 3136 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 62,656 psi | 90% | 3186 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 61,699 psi | 89% | 3251 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,000 psi | 82% | 3189 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 84% | 59,509 psi | 85% | 3133 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 60,611 psi | 87% | 3258 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 62,482 psi | 90% | 3323 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 59,335 psi | 85% | 3356 fps | 98.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,647 psi | 73% | 3182 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 61,989 psi | 89% | 3205 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 59,422 psi | 85% | 3284 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,721 psi | 76% | 3320 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 60,379 psi | 87% | 3215 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 62,308 psi | 90% | 3278 fps | 99.6% |
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% | 54,418 psi | 78% | 3031 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 52,359 psi | 75% | 3058 fps | 98.9% |
| Accurate 3100 | <<locked>> | 82% | 31,343 psi | 45% | 2677 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 51,634 psi | 74% | 3041 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,871 psi | 57% | 2910 fps | 99.2% |
| Accurate High Country | <<locked>> | 88% | 42,670 psi | 61% | 3058 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 92% | 46,644 psi | 67% | 3123 fps | 95.1% |
| ADI APS 450 | <<locked>> | 80% | 58,624 psi | 84% | 2477 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 57,421 psi | 82% | 3182 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 48,820 psi | 70% | 3028 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,711 psi | 56% | 2894 fps | 95% |
| ADI AR 2213 | <<locked>> | 92% | 45,397 psi | 65% | 3071 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 98% | 35,897 psi | 52% | 2894 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 55,245 psi | 79% | 3271 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,943 psi | 56% | 2897 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,559 psi | 71% | 3051 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,823 psi | 76% | 3127 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,653 psi | 56% | 2927 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,527 psi | 64% | 3061 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,566 psi | 55% | 2890 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,059 psi | 56% | 2946 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,297 psi | 41% | 2654 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,313 psi | 44% | 2726 fps | 95.3% |
| Alliant Reloder-26 | 89.8 gr | 80% | 30,574 psi | 44% | 2782 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 57,899 psi | 83% | 3202 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 55,013 psi | 79% | 3166 fps | 95% |
| Bofors RP15 | <<locked>> | 90% | 38,537 psi | 55% | 2930 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 49,951 psi | 72% | 3061 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,263 psi | 59% | 3022 fps | 95.4% |
| Bofors RP5 | <<locked>> | 88% | 39,059 psi | 56% | 2946 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 43,671 psi | 63% | 2933 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 96% | 41,640 psi | 60% | 2976 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 50,256 psi | 72% | 3081 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,018 psi | 60% | 2966 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 44,831 psi | 64% | 2989 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 90% | 45,411 psi | 65% | 3018 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,718 psi | 69% | 3061 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 58,088 psi | 83% | 3189 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,245 psi | 52% | 2805 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 55,245 psi | 79% | 3173 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,696 psi | 56% | 3015 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 41,220 psi | 59% | 2982 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 39% | 1808 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 55,666 psi | 80% | 3140 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,329 psi | 74% | 3061 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,548 psi | 77% | 3097 fps | 99.5% |
| IMR 4350 | <<locked>> | 80% | 39,349 psi | 57% | 2851 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,150 psi | 65% | 2963 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 38,319 psi | 55% | 2861 fps | 99% |
| IMR 4895 | <<locked>> | 80% | 54,201 psi | 78% | 3156 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,282 psi | 68% | 3018 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 92% | 43,410 psi | 62% | 3041 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 80% | 58,262 psi | 84% | 3146 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 55,999 psi | 80% | 3100 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,576 psi | 74% | 3054 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,525 psi | 61% | 2907 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 40,741 psi | 59% | 2887 fps | 97.6% |
| Lovex S071 | <<locked>> | 88% | 32,793 psi | 47% | 2717 fps | 95.9% |
| Norma 201 | <<locked>> | 80% | 55,883 psi | 80% | 3117 fps | 100% |
| Norma 202 | <<locked>> | 80% | 56,898 psi | 82% | 3110 fps | 100% |
| Norma 203B | <<locked>> | 80% | 52,170 psi | 75% | 3114 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,030 psi | 56% | 2881 fps | 95% |
| Norma MRP | 91.5 gr | 84% | 35,520 psi | 51% | 2887 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 39,624 psi | 57% | 2910 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 80% | 53,127 psi | 76% | 3136 fps | 100% |
| Ramshot Grand | 99.4 gr | 92% | 43,207 psi | 62% | 3048 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 38,653 psi | 56% | 2897 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 90% | 35,636 psi | 51% | 2841 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 40% | 1850 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,314 psi | 72% | 3064 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 57,928 psi | 83% | 3261 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,340 psi | 68% | 3117 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,929 psi | 57% | 2933 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,667 psi | 56% | 2946 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,636 psi | 51% | 2920 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 53,185 psi | 76% | 3068 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,963 psi | 67% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,946 psi | 62% | 2936 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 86% | 40,321 psi | 58% | 2933 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 43,671 psi | 63% | 2933 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,525 psi | 61% | 2907 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 58,262 psi | 84% | 3146 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 51,576 psi | 74% | 3054 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,741 psi | 59% | 2887 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,573 psi | 70% | 3068 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 56,144 psi | 81% | 3153 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 56,565 psi | 81% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,022 psi | 69% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,669 psi | 60% | 2844 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,987 psi | 57% | 2927 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 56,318 psi | 81% | 3031 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 58,813 psi | 84% | 3169 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 47,152 psi | 68% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,166 psi | 68% | 2986 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 36,230 psi | 52% | 2861 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,636 psi | 51% | 2785 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 57,217 psi | 82% | 3018 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 53,780 psi | 77% | 3022 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,954 psi | 78% | 3035 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,107 psi | 65% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,089 psi | 59% | 2907 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 37,869 psi | 54% | 2828 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 52,185 psi | 75% | 3028 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,480 psi | 58% | 2904 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,488 psi | 45% | 2740 fps | 97.7% |
| Vihtavuori N560 | <<locked>> | 90% | 44,614 psi | 64% | 3081 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 96% | 44,034 psi | 63% | 3051 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,364 psi | 58% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,192 psi | 61% | 2972 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,976 psi | 36% | 2628 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 56,420 psi | 81% | 3156 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,437 psi | 58% | 2894 fps | 95.7% |
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 112 powders for .338 Lapua Mag. Ackley Improved loaded with the .338 | 185gr | Peregrine Bushmaster (VRG-3). Accurate High Country delivers the highest muzzle velocity at 3,406 fps; across all powders the maximum-charge window runs from 2,018 fps to 3,406 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 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 185.0 gr projectile in 0.338" calls for a 1:16.5 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. Norma MRP, Alliant Reloder-26, Ramshot Grand rank at the top here: for .338 Lapua Mag. Ackley Improved with the .338 | 185gr | Peregrine Bushmaster (VRG-3) 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.