Load Specifications
Bullet Manufacturer:Alaska Bullet Works
Bullet Weight:275 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Win Mag. load data
Case Length (l3):2.5"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:86 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:15.0
Load data in caliber .338 Win Mag. with .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC bullet and 108 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and ReloadSwiss RS 62.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 54,766 psi | 88% | 2310 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,057 psi | 90% | 2372 fps | 99.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,631 psi | 78% | 2362 fps | 99.5% |
| Accurate 4064 | <<locked>> | 86% | 54,737 psi | 88% | 2352 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,752 psi | 88% | 2448 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 54,172 psi | 87% | 2379 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,303 psi | 89% | 2385 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,883 psi | 90% | 2487 fps | 98.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 50,111 psi | 80% | 2431 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,318 psi | 90% | 2372 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,186 psi | 87% | 2493 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,666 psi | 89% | 2402 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,260 psi | 90% | 2425 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,637 psi | 89% | 2497 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,214 psi | 85% | 2474 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,984 psi | 88% | 2480 fps | 98.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,443 psi | 78% | 2431 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,905 psi | 74% | 2382 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,074 psi | 64% | 2316 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,750 psi | 83% | 2543 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 53,809 psi | 86% | 2398 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 44,628 psi | 72% | 2369 fps | 96.9% |
| Bofors RP3 | <<locked>> | 86% | 53,011 psi | 85% | 2375 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,443 psi | 78% | 2431 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 56,057 psi | 90% | 2408 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,275 psi | 90% | 2405 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 53,534 psi | 86% | 2392 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 53,664 psi | 86% | 2451 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 54,070 psi | 87% | 2418 fps | 98.8% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 53,635 psi | 86% | 2434 fps | 96.7% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2421 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 82% | 54,752 psi | 88% | 2385 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,956 psi | 90% | 2428 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,621 psi | 88% | 2421 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 53,447 psi | 86% | 2484 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,216 psi | 58% | 1440 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,898 psi | 90% | 2388 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,361 psi | 89% | 2362 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,795 psi | 88% | 2369 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,201 psi | 87% | 2359 fps | 99.4% |
| IMR 4350 | <<locked>> | 94% | 53,229 psi | 85% | 2392 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,418 psi | 87% | 2388 fps | 99.4% |
| IMR 4831 | <<locked>> | 96% | 55,100 psi | 88% | 2441 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,230 psi | 87% | 2405 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2425 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 47,645 psi | 76% | 2408 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 82% | 56,318 psi | 90% | 2372 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,404 psi | 87% | 2356 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,461 psi | 86% | 2316 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,839 psi | 88% | 2362 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,172 psi | 87% | 2382 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 55,332 psi | 89% | 2421 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,509 psi | 65% | 2238 fps | 98.3% |
| Norma 201 | <<locked>> | 82% | 53,171 psi | 85% | 2329 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,795 psi | 86% | 2329 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,477 psi | 89% | 2411 fps | 100% |
| Norma 204 | <<locked>> | 94% | 53,795 psi | 86% | 2441 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 51,329 psi | 82% | 2507 fps | 99.3% |
| Norma URP | <<locked>> | 94% | 53,780 psi | 86% | 2438 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,115 psi | 90% | 2438 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 47,558 psi | 76% | 2415 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 55,811 psi | 89% | 2487 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 42,264 psi | 68% | 2316 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,333 psi | 90% | 2411 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,782 psi | 59% | 1476 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,693 psi | 86% | 2379 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,403 psi | 86% | 2438 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 52,837 psi | 85% | 2467 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,476 psi | 87% | 2470 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,287 psi | 85% | 2500 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 38,769 psi | 62% | 2323 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 84% | 53,795 psi | 86% | 2333 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,185 psi | 85% | 2372 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,360 psi | 87% | 2418 fps | 97.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,128 psi | 87% | 2467 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 92% | 56,057 psi | 90% | 2408 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,172 psi | 87% | 2382 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,404 psi | 87% | 2356 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,839 psi | 88% | 2362 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,332 psi | 89% | 2421 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,563 psi | 87% | 2425 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,317 psi | 89% | 2388 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,159 psi | 90% | 2402 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,114 psi | 87% | 2267 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,563 psi | 87% | 2270 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,099 psi | 87% | 2346 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,635 psi | 86% | 2461 fps | 98.6% |
| Somchem S335 | <<locked>> | 82% | 53,838 psi | 86% | 2270 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,766 psi | 88% | 2372 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,156 psi | 85% | 2369 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 55,985 psi | 90% | 2415 fps | 97% |
| Somchem S365 | <<locked>> | 98% | 55,869 psi | 90% | 2477 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,766 psi | 88% | 2444 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 82% | 54,592 psi | 88% | 2251 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,737 psi | 86% | 2290 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,273 psi | 87% | 2310 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,476 psi | 87% | 2349 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,854 psi | 90% | 2431 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,268 psi | 76% | 2333 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 86% | 55,651 psi | 89% | 2349 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,969 psi | 88% | 2441 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,155 psi | 82% | 2444 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 52,025 psi | 83% | 2497 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,666 psi | 89% | 2408 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 53,940 psi | 86% | 2454 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,017 psi | 66% | 2425 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,188 psi | 90% | 2408 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,300 psi | 82% | 2395 fps | 98% |
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 2495 | <<locked>> | 80% | 48,182 psi | 77% | 2231 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,209 psi | 74% | 2234 fps | 97.8% |
| Accurate 3100 | <<locked>> | 86% | 30,501 psi | 49% | 2044 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 45,614 psi | 73% | 2238 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,171 psi | 55% | 2126 fps | 98.3% |
| ADI AR 2206H | <<locked>> | 80% | 50,937 psi | 82% | 2336 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,424 psi | 70% | 2218 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 40,712 psi | 65% | 2251 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 98% | 46,978 psi | 75% | 2382 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,011 psi | 85% | 2329 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,239 psi | 76% | 2395 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,656 psi | 70% | 2238 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,528 psi | 75% | 2293 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,808 psi | 54% | 2136 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,927 psi | 61% | 2241 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 40,219 psi | 64% | 2247 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 39,958 psi | 64% | 2287 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,729 psi | 40% | 1939 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 31,430 psi | 50% | 2126 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 82% | 27,731 psi | 44% | 2073 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,401 psi | 81% | 2352 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 39,421 psi | 63% | 2277 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 43,613 psi | 70% | 2247 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 39,958 psi | 64% | 2287 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 38,667 psi | 62% | 2139 fps | 96.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,692 psi | 84% | 2362 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,150 psi | 71% | 2257 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 36,230 psi | 58% | 2165 fps | 96.2% |
| Hodgdon H4350 | <<locked>> | 80% | 39,363 psi | 63% | 2185 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 96% | 47,166 psi | 76% | 2343 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 49,298 psi | 79% | 2372 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 51,459 psi | 83% | 2343 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,328 psi | 50% | 2051 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,964 psi | 77% | 2333 fps | 100% |
| Hodgdon Superformance | 58.4 gr | 80% | 35,085 psi | 56% | 2172 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 44% | 1286 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,168 psi | 79% | 2300 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,909 psi | 83% | 2320 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,672 psi | 73% | 2244 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,776 psi | 77% | 2267 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 36,680 psi | 59% | 2126 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,205 psi | 64% | 2169 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 33,098 psi | 53% | 2090 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 47,674 psi | 76% | 2316 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 46,180 psi | 74% | 2290 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 44,701 psi | 72% | 2359 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 53,011 psi | 85% | 2329 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,850 psi | 82% | 2313 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,328 psi | 81% | 2274 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,759 psi | 73% | 2241 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,753 psi | 61% | 2129 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 35,839 psi | 57% | 2110 fps | 96.3% |
| Lovex S071 | <<locked>> | 92% | 31,459 psi | 50% | 2067 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 49,980 psi | 80% | 2290 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,560 psi | 81% | 2287 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,905 psi | 74% | 2283 fps | 100% |
| Norma 204 | <<locked>> | 86% | 41,104 psi | 66% | 2244 fps | 95.6% |
| Norma MRP | <<locked>> | 88% | 34,330 psi | 55% | 2201 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 34,185 psi | 55% | 2123 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 80% | 45,905 psi | 74% | 2303 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 44,309 psi | 71% | 2362 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 33,156 psi | 53% | 2113 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 96% | 36,695 psi | 59% | 2211 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,823 psi | 85% | 2369 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,528 psi | 44% | 1316 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,121 psi | 71% | 2241 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,806 psi | 80% | 2388 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,321 psi | 65% | 2283 fps | 100% |
| ReloadSwiss RS 62 | 55.2 gr | 80% | 33,721 psi | 54% | 2142 fps | 97.9% |
| ReloadSwiss RS 70 | 56.2 gr | 80% | 33,315 psi | 53% | 2149 fps | 97.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 36,260 psi | 58% | 2267 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 47,514 psi | 76% | 2247 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,973 psi | 66% | 2201 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 45,049 psi | 72% | 2280 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 39,117 psi | 63% | 2231 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 38,667 psi | 62% | 2139 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,753 psi | 61% | 2129 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,850 psi | 82% | 2313 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,759 psi | 73% | 2241 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,839 psi | 57% | 2110 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,959 psi | 67% | 2247 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,764 psi | 83% | 2343 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,313 psi | 79% | 2313 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,053 psi | 82% | 2231 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,960 psi | 69% | 2126 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,825 psi | 59% | 2077 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 38,754 psi | 62% | 2228 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 50,662 psi | 81% | 2231 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,256 psi | 82% | 2329 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,655 psi | 67% | 2201 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 49,124 psi | 79% | 2320 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 30,734 psi | 49% | 2090 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 34,925 psi | 56% | 2126 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 51,547 psi | 83% | 2218 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,732 psi | 77% | 2218 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,732 psi | 77% | 2231 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,537 psi | 63% | 2142 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,592 psi | 57% | 2123 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 36,506 psi | 59% | 2152 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 46,166 psi | 74% | 2231 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,143 psi | 56% | 2129 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 26,731 psi | 43% | 2001 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 96% | 45,426 psi | 73% | 2392 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,824 psi | 56% | 2100 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 36,419 psi | 58% | 2172 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 23,134 psi | 37% | 1955 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,240 psi | 79% | 2320 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 39,146 psi | 63% | 2201 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 108 powders for .338 Win Mag. loaded with the .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,543 fps; across all powders the maximum-charge window runs from 1,440 fps to 2,543 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 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 2209, 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. ReloadSwiss RS 70, Hodgdon Superformance, ReloadSwiss RS 62 rank at the top here: for .338 Win 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.