Load Specifications
Load data in caliber .338 Blaser Mag. with .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 53,127 psi | 87% | 2408 fps | 99.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,925 psi | 89% | 2500 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 52,533 psi | 86% | 2388 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,663 psi | 86% | 2490 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 52,083 psi | 86% | 2585 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 84% | 52,663 psi | 86% | 2421 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,679 psi | 88% | 2539 fps | 99.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,708 psi | 90% | 2585 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 35,157 psi | 58% | 2300 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,955 psi | 90% | 2572 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,156 psi | 87% | 2438 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,490 psi | 88% | 2457 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,737 psi | 88% | 2543 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,679 psi | 90% | 2559 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 52,852 psi | 87% | 2526 fps | 99.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,577 psi | 88% | 2582 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,807 psi | 83% | 2516 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,034 psi | 72% | 2464 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,186 psi | 89% | 2644 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,110 psi | 81% | 2516 fps | 98.8% |
| Bofors RP3 | <<locked>> | 84% | 53,969 psi | 89% | 2454 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 39,972 psi | 66% | 2398 fps | 96.2% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,577 psi | 88% | 2582 fps | 99.4% |
| Bofors RP7 | <<locked>> | 88% | 53,301 psi | 88% | 2448 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 43,801 psi | 72% | 2408 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 84% | 54,172 psi | 89% | 2470 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,839 psi | 90% | 2539 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 88% | 54,810 psi | 90% | 2503 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 98% | 54,868 psi | 90% | 2533 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,664 psi | 88% | 2516 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,867 psi | 88% | 2470 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,178 psi | 71% | 2503 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 90% | 54,926 psi | 90% | 2579 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 60% | 1499 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,141 psi | 86% | 2402 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,476 psi | 89% | 2438 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 54,157 psi | 89% | 2480 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,882 psi | 90% | 2470 fps | 99.9% |
| IMR 4831 | <<locked>> | 92% | 53,127 psi | 87% | 2484 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,853 psi | 90% | 2480 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,258 psi | 87% | 2477 fps | 97.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,098 psi | 86% | 2562 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 52,315 psi | 86% | 2395 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,955 psi | 90% | 2467 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 52,852 psi | 87% | 2461 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,962 psi | 74% | 2375 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 52,794 psi | 87% | 2444 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,694 psi | 90% | 2530 fps | 99.2% |
| Norma MRP | <<locked>> | 98% | 52,997 psi | 87% | 2605 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 51,605 psi | 85% | 2480 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,200 psi | 87% | 2470 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,402 psi | 86% | 2579 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 92% | 53,679 psi | 88% | 2530 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,644 psi | 77% | 2467 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 61% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,273 psi | 89% | 2461 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,288 psi | 89% | 2549 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,402 psi | 86% | 2513 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,563 psi | 90% | 2589 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,946 psi | 71% | 2497 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 54,259 psi | 89% | 2402 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,070 psi | 89% | 2451 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 52,098 psi | 86% | 2464 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 96% | 52,185 psi | 86% | 2513 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 88% | 53,301 psi | 88% | 2448 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,955 psi | 90% | 2467 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 52,315 psi | 86% | 2395 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,852 psi | 87% | 2461 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,054 psi | 85% | 2461 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,114 psi | 90% | 2339 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,636 psi | 90% | 2428 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,100 psi | 90% | 2556 fps | 99.5% |
| Somchem S355 | <<locked>> | 86% | 54,012 psi | 89% | 2444 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,345 psi | 88% | 2457 fps | 97.6% |
| Somchem S365 | <<locked>> | 94% | 54,230 psi | 89% | 2523 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 52,808 psi | 87% | 2493 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 82% | 54,592 psi | 90% | 2362 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,781 psi | 90% | 2379 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 51,880 psi | 85% | 2382 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,577 psi | 88% | 2470 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,953 psi | 85% | 2470 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 52,866 psi | 87% | 2382 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,678 psi | 86% | 2480 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 53,258 psi | 87% | 2536 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,417 psi | 88% | 2598 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 45,542 psi | 75% | 2474 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,040 psi | 87% | 2444 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,085 psi | 90% | 2543 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,788 psi | 75% | 2579 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,721 psi | 87% | 2490 fps | 99.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 49,777 psi | 82% | 2362 fps | 99.1% |
| Accurate 3100 | <<locked>> | 80% | 27,717 psi | 46% | 2041 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 49,385 psi | 81% | 2349 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,739 psi | 62% | 2260 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 42,293 psi | 69% | 2425 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 46,572 psi | 76% | 2336 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 36,535 psi | 60% | 2244 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 92% | 42,148 psi | 69% | 2382 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 96% | 31,067 psi | 51% | 2195 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,343 psi | 84% | 2526 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,036 psi | 77% | 2352 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,299 psi | 83% | 2415 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,796 psi | 60% | 2270 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,553 psi | 68% | 2372 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 36,201 psi | 59% | 2241 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 36,260 psi | 60% | 2287 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,934 psi | 44% | 2067 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 26,890 psi | 44% | 2077 fps | 95% |
| Alliant Reloder-26 | 61.8 gr | 80% | 28,616 psi | 47% | 2169 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 35,795 psi | 59% | 2277 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 47,413 psi | 78% | 2365 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 37,536 psi | 62% | 2349 fps | 95.4% |
| Bofors RP5 | <<locked>> | 88% | 36,260 psi | 60% | 2287 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,727 psi | 69% | 2267 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 96% | 38,421 psi | 63% | 2306 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 47,688 psi | 78% | 2379 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 39,668 psi | 65% | 2303 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 42,569 psi | 70% | 2313 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 42,221 psi | 69% | 2336 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 44,150 psi | 72% | 2369 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,316 psi | 56% | 2172 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 94% | 35,781 psi | 59% | 2343 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 38,363 psi | 63% | 2313 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 45% | 1339 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,008 psi | 80% | 2359 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,097 psi | 84% | 2388 fps | 99.6% |
| IMR 4350 | <<locked>> | 80% | 37,304 psi | 61% | 2205 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,134 psi | 71% | 2290 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 36,274 psi | 60% | 2218 fps | 99.4% |
| IMR 4895 | <<locked>> | 80% | 51,605 psi | 85% | 2438 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 41,640 psi | 68% | 2290 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 40,292 psi | 66% | 2359 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 49,211 psi | 81% | 2356 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,654 psi | 67% | 2247 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 38,812 psi | 64% | 2234 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 27,079 psi | 44% | 2024 fps | 95% |
| Norma 203B | <<locked>> | 80% | 49,661 psi | 82% | 2405 fps | 100% |
| Norma 204 | <<locked>> | 80% | 36,666 psi | 60% | 2231 fps | 95.5% |
| Norma MRP | 61.5 gr | 82% | 31,024 psi | 51% | 2195 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 37,420 psi | 61% | 2251 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 80% | 49,806 psi | 82% | 2425 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 39,769 psi | 65% | 2362 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 36,187 psi | 59% | 2244 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 32,851 psi | 54% | 2205 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 46% | 1368 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,703 psi | 78% | 2369 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,150 psi | 72% | 2411 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,318 psi | 61% | 2277 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,216 psi | 59% | 2287 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 32,677 psi | 54% | 2270 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 51,024 psi | 84% | 2362 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,599 psi | 73% | 2320 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 40,466 psi | 66% | 2277 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 35,317 psi | 58% | 2228 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 41,727 psi | 69% | 2267 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,654 psi | 67% | 2247 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 49,211 psi | 81% | 2356 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,812 psi | 64% | 2234 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,629 psi | 75% | 2369 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,847 psi | 75% | 2224 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,769 psi | 65% | 2201 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 34,969 psi | 57% | 2221 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 44,918 psi | 74% | 2320 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 43,874 psi | 72% | 2313 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 33,881 psi | 56% | 2215 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 31,531 psi | 52% | 2119 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 51,242 psi | 84% | 2323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,343 psi | 84% | 2336 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,830 psi | 70% | 2254 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,943 psi | 64% | 2251 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 33,112 psi | 54% | 2149 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 49,588 psi | 81% | 2339 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,261 psi | 63% | 2254 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 29,660 psi | 49% | 2133 fps | 98.4% |
| Vihtavuori N560 | 67.4 gr | 90% | 40,901 psi | 67% | 2388 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 96% | 39,711 psi | 65% | 2369 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,811 psi | 62% | 2221 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 39,668 psi | 65% | 2303 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,714 psi | 39% | 2057 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 86% | 35,128 psi | 58% | 2195 fps | 95.1% |
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 90 powders for .338 Blaser Mag. loaded with the .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,644 fps; across all powders the maximum-charge window runs from 1,499 fps to 2,644 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 275.0 gr projectile in 0.338" calls for a 1:15.0 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .338 Blaser Mag. with the .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC 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.