Load Specifications
Bullet:.338 | 185gr | Hornady CX
Bullet Manufacturer:Hornady
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:1:12.5
Load data in caliber .338 Lapua Mag. Ackley Improved with .338 | 185gr | Hornady CX bullet and 111 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Accurate High Country.
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% | 62,410 psi | 90% | 3136 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 59,973 psi | 86% | 3179 fps | 99.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 59,509 psi | 85% | 3228 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 62,859 psi | 90% | 3199 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 61,409 psi | 88% | 3284 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 61,525 psi | 88% | 3406 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 98% | 58,436 psi | 84% | 3337 fps | 97.8% |
| ADI APS 450 | <<locked>> | 84% | 62,642 psi | 90% | 2539 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 61,482 psi | 88% | 3241 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 62,961 psi | 90% | 3248 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 62,656 psi | 90% | 3343 fps | 99.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 60,307 psi | 87% | 3346 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,479 psi | 55% | 2963 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 59,640 psi | 86% | 3337 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 62,787 psi | 90% | 3340 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 60,205 psi | 86% | 3215 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 60,408 psi | 87% | 3245 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 62,163 psi | 89% | 3343 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 59,944 psi | 86% | 3310 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 61,830 psi | 89% | 3327 fps | 99.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 59,596 psi | 86% | 3337 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,420 psi | 81% | 3245 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,704 psi | 70% | 3182 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 61,902 psi | 89% | 3412 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 62,120 psi | 89% | 3264 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 58,697 psi | 84% | 3232 fps | 95.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,404 psi | 78% | 3251 fps | 98.9% |
| Bofors RP3 | <<locked>> | 86% | 61,598 psi | 88% | 3235 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,396 psi | 64% | 3094 fps | 96.5% |
| Bofors RP5ᴾ | <<locked>> | 100% | 59,596 psi | 86% | 3337 fps | 99.5% |
| Bofors RP7 | <<locked>> | 90% | 60,394 psi | 87% | 3228 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,167 psi | 69% | 3117 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 86% | 61,772 psi | 89% | 3258 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 59,437 psi | 85% | 3287 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 90% | 62,656 psi | 90% | 3301 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 98% | 60,249 psi | 87% | 3278 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 59,074 psi | 85% | 3261 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 82% | 62,207 psi | 89% | 3251 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 62,511 psi | 90% | 3248 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 59,408 psi | 85% | 3235 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,616 psi | 68% | 3232 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 90% | 60,684 psi | 87% | 3330 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,506 psi | 52% | 2018 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 59,451 psi | 85% | 3196 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 62,221 psi | 89% | 3225 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 61,090 psi | 88% | 3219 fps | 99.9% |
| IMR 4350 | <<locked>> | 94% | 62,047 psi | 89% | 3264 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 62,105 psi | 89% | 3258 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 61,540 psi | 88% | 3268 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 62,033 psi | 89% | 3271 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 61,308 psi | 88% | 3258 fps | 98.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,537 psi | 83% | 3314 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 82% | 62,526 psi | 90% | 3202 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 59,727 psi | 86% | 3156 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 62,395 psi | 90% | 3212 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 62,453 psi | 90% | 3248 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 60,292 psi | 87% | 3241 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,298 psi | 71% | 3071 fps | 99.6% |
| Norma 201 | <<locked>> | 82% | 59,727 psi | 86% | 3173 fps | 100% |
| Norma 202 | <<locked>> | 82% | 60,771 psi | 87% | 3166 fps | 100% |
| Norma 203B | <<locked>> | 84% | 59,698 psi | 86% | 3228 fps | 100% |
| Norma 204 | <<locked>> | 92% | 59,596 psi | 86% | 3271 fps | 99.3% |
| Norma MRP | <<locked>> | 98% | 59,524 psi | 86% | 3363 fps | 100% |
| Norma URP | <<locked>> | 92% | 59,538 psi | 86% | 3264 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 61,148 psi | 88% | 3255 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 58,508 psi | 84% | 3337 fps | 99% |
| Ramshot Hunter | <<locked>> | 94% | 62,758 psi | 90% | 3330 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,504 psi | 75% | 3196 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,202 psi | 53% | 2067 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 61,627 psi | 89% | 3245 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 62,265 psi | 89% | 3323 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 59,335 psi | 85% | 3297 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 61,627 psi | 89% | 3307 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 60,263 psi | 87% | 3346 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,080 psi | 69% | 3228 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 84% | 60,466 psi | 87% | 3173 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 61,612 psi | 89% | 3228 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 59,857 psi | 86% | 3245 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 98% | 61,177 psi | 88% | 3314 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 90% | 60,394 psi | 87% | 3228 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 62,453 psi | 90% | 3248 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 62,526 psi | 90% | 3202 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 62,395 psi | 90% | 3212 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 60,292 psi | 87% | 3241 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 59,611 psi | 86% | 3241 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 60,031 psi | 86% | 3209 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 60,292 psi | 87% | 3091 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 61,931 psi | 89% | 3091 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 62,366 psi | 90% | 3202 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 60,713 psi | 87% | 3310 fps | 99.6% |
| Somchem S335 | <<locked>> | 82% | 60,046 psi | 86% | 3084 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 61,221 psi | 88% | 3225 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 62,178 psi | 89% | 3238 fps | 98.5% |
| Somchem S365 | <<locked>> | 94% | 59,625 psi | 86% | 3261 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 61,772 psi | 89% | 3281 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 60,945 psi | 88% | 3064 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 61,192 psi | 88% | 3120 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 61,511 psi | 88% | 3140 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 62,845 psi | 90% | 3189 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 61,888 psi | 89% | 3255 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,159 psi | 82% | 3192 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 84% | 59,698 psi | 86% | 3136 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 60,945 psi | 88% | 3261 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 62,714 psi | 90% | 3327 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 59,538 psi | 86% | 3356 fps | 98.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,952 psi | 73% | 3186 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 62,120 psi | 89% | 3209 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 59,625 psi | 86% | 3287 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,084 psi | 76% | 3327 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 60,582 psi | 87% | 3219 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 62,424 psi | 90% | 3281 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% | 54,650 psi | 79% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 52,344 psi | 75% | 3058 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 31,502 psi | 45% | 2684 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,866 psi | 75% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,074 psi | 58% | 2917 fps | 99.3% |
| Accurate High Country | 96.2 gr | 88% | 42,830 psi | 62% | 3064 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 92% | 46,818 psi | 67% | 3130 fps | 95.2% |
| ADI APS 450 | <<locked>> | 80% | 58,566 psi | 84% | 2477 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 57,624 psi | 83% | 3186 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 48,863 psi | 70% | 3028 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,885 psi | 56% | 2900 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 45,585 psi | 65% | 3077 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 96% | 33,707 psi | 48% | 2828 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 55,477 psi | 80% | 3274 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,117 psi | 56% | 2900 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,617 psi | 71% | 3051 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,055 psi | 76% | 3130 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,856 psi | 56% | 2933 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,730 psi | 64% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,740 psi | 56% | 2894 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,218 psi | 56% | 2949 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,427 psi | 41% | 2661 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,443 psi | 44% | 2733 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 30,719 psi | 44% | 2785 fps | 96.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 58,102 psi | 83% | 3205 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 55,100 psi | 79% | 3169 fps | 95.1% |
| Bofors RP15 | <<locked>> | 90% | 38,696 psi | 56% | 2936 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 50,154 psi | 72% | 3064 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,524 psi | 60% | 3028 fps | 95.5% |
| Bofors RP5 | <<locked>> | 88% | 39,218 psi | 56% | 2949 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 43,714 psi | 63% | 2933 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 96% | 41,771 psi | 60% | 2979 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 50,473 psi | 73% | 3081 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,206 psi | 61% | 2972 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,034 psi | 65% | 2995 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 90% | 45,571 psi | 65% | 3022 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,863 psi | 69% | 3064 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 58,320 psi | 84% | 3196 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,419 psi | 52% | 2808 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 55,419 psi | 80% | 3176 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,841 psi | 56% | 3018 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 41,394 psi | 59% | 2986 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 39% | 1808 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 55,738 psi | 80% | 3140 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,372 psi | 74% | 3064 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,722 psi | 77% | 3100 fps | 99.5% |
| IMR 4350 | <<locked>> | 80% | 39,392 psi | 57% | 2854 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,324 psi | 65% | 2969 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 38,479 psi | 55% | 2867 fps | 99.1% |
| IMR 4895 | <<locked>> | 80% | 54,433 psi | 78% | 3163 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,425 psi | 64% | 2959 fps | 95% |
| IMR 7828 SSC | <<locked>> | 92% | 43,569 psi | 63% | 3048 fps | 95.3% |
| Lovex D073.6 | <<locked>> | 80% | 58,320 psi | 84% | 3146 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 56,028 psi | 80% | 3100 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,619 psi | 74% | 3054 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,685 psi | 61% | 2910 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 40,930 psi | 59% | 2890 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 30,748 psi | 44% | 2661 fps | 95% |
| Norma 201 | <<locked>> | 80% | 56,130 psi | 81% | 3120 fps | 100% |
| Norma 202 | <<locked>> | 80% | 56,927 psi | 82% | 3114 fps | 100% |
| Norma 203B | <<locked>> | 80% | 52,373 psi | 75% | 3114 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,073 psi | 56% | 2884 fps | 95% |
| Norma MRP | 91.8 gr | 84% | 35,679 psi | 51% | 2890 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 39,842 psi | 57% | 2913 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 80% | 53,330 psi | 77% | 3140 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 43,337 psi | 62% | 3051 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 38,711 psi | 56% | 2897 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 90% | 35,795 psi | 51% | 2844 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 40% | 1854 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,517 psi | 73% | 3068 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 57,986 psi | 83% | 3261 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,529 psi | 68% | 3120 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,132 psi | 58% | 2940 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,827 psi | 56% | 2953 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,766 psi | 51% | 2927 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 53,388 psi | 77% | 3068 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,181 psi | 68% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,120 psi | 62% | 2943 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 37,768 psi | 54% | 2874 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 43,714 psi | 63% | 2933 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,685 psi | 61% | 2910 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 58,320 psi | 84% | 3146 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 51,619 psi | 74% | 3054 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,930 psi | 59% | 2890 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,646 psi | 70% | 3068 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 56,159 psi | 81% | 3153 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 56,623 psi | 81% | 3041 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,051 psi | 69% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,785 psi | 60% | 2851 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,147 psi | 58% | 2933 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 56,536 psi | 81% | 3038 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 47,355 psi | 68% | 3009 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,340 psi | 68% | 2992 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 36,318 psi | 52% | 2864 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,795 psi | 51% | 2792 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 57,261 psi | 82% | 3018 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 53,853 psi | 77% | 3022 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,186 psi | 78% | 3038 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,310 psi | 65% | 2927 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,249 psi | 59% | 2910 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 38,029 psi | 55% | 2835 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 52,388 psi | 75% | 3031 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,654 psi | 58% | 2910 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,647 psi | 45% | 2743 fps | 97.7% |
| Vihtavuori N560 | 98.4 gr | 90% | 44,759 psi | 64% | 3087 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 96% | 44,208 psi | 64% | 3058 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,524 psi | 58% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,351 psi | 61% | 2976 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,019 psi | 36% | 2631 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 56,637 psi | 81% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,640 psi | 58% | 2900 fps | 95.8% |
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 111 powders for .338 Lapua Mag. Ackley Improved loaded with the .338 | 185gr | Hornady CX. Alliant Reloder-26 delivers the highest muzzle velocity at 3,412 fps; across all powders the maximum-charge window runs from 2,018 fps to 3,412 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 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 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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, Norma MRP, Accurate High Country rank at the top here: for .338 Lapua Mag. Ackley Improved with the .338 | 185gr | Hornady CX 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.