Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:300 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:1:12.0
Load data in caliber .338 Win Mag. with .338 | 300gr | Nosler Custom Competition bullet and 110 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 Alliant Reloder-16.
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% | 53,795 psi | 86% | 2162 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,333 psi | 90% | 2231 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,543 psi | 76% | 2218 fps | 99.6% |
| Accurate 4064 | <<locked>> | 86% | 53,780 psi | 86% | 2205 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,795 psi | 86% | 2300 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 53,577 psi | 86% | 2231 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,433 psi | 87% | 2234 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,056 psi | 88% | 2336 fps | 98.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 49,037 psi | 79% | 2280 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,782 psi | 89% | 2224 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,200 psi | 85% | 2339 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,897 psi | 88% | 2251 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,332 psi | 89% | 2274 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,708 psi | 88% | 2343 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,854 psi | 90% | 2365 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,925 psi | 86% | 2326 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,369 psi | 76% | 2283 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,860 psi | 72% | 2234 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,378 psi | 63% | 2175 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,531 psi | 81% | 2388 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 52,997 psi | 85% | 2247 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 43,540 psi | 70% | 2221 fps | 97.1% |
| Bofors RP3 | <<locked>> | 88% | 55,405 psi | 89% | 2264 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,369 psi | 76% | 2283 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 55,303 psi | 89% | 2260 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,332 psi | 89% | 2254 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,101 psi | 90% | 2283 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 53,969 psi | 87% | 2316 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 94% | 54,534 psi | 87% | 2283 fps | 99% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 51,445 psi | 82% | 2270 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 54,128 psi | 87% | 2238 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,824 psi | 88% | 2277 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,925 psi | 86% | 2270 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 38,464 psi | 62% | 2192 fps | 96% |
| Hodgdon Superformance | <<locked>> | 94% | 56,173 psi | 90% | 2379 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,085 psi | 58% | 1342 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,157 psi | 87% | 2228 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 53,359 psi | 86% | 2198 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 53,330 psi | 86% | 2211 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,796 psi | 89% | 2238 fps | 99.7% |
| IMR 4350 | <<locked>> | 96% | 55,753 psi | 89% | 2287 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,505 psi | 86% | 2238 fps | 99.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,737 psi | 88% | 2297 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 53,403 psi | 86% | 2254 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 54,679 psi | 88% | 2280 fps | 97.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,198 psi | 80% | 2313 fps | 97.1% |
| IMR 8208 XBR | <<locked>> | 82% | 55,782 psi | 89% | 2224 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 53,577 psi | 86% | 2208 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,956 psi | 90% | 2205 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,186 psi | 87% | 2215 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 53,447 psi | 86% | 2238 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 54,418 psi | 87% | 2270 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,581 psi | 63% | 2100 fps | 98.5% |
| Norma 201 | <<locked>> | 84% | 55,695 psi | 89% | 2221 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,101 psi | 90% | 2215 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,621 psi | 88% | 2260 fps | 100% |
| Norma 204 | <<locked>> | 96% | 56,347 psi | 90% | 2333 fps | 98.9% |
| Norma MRPᴾ | <<locked>> | 100% | 50,038 psi | 80% | 2349 fps | 99.4% |
| Norma URP | <<locked>> | 96% | 56,289 psi | 90% | 2326 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 54,868 psi | 88% | 2283 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,592 psi | 86% | 2369 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 96% | 54,824 psi | 88% | 2333 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,035 psi | 74% | 2247 fps | 98.2% |
| Ramshot TAC | <<locked>> | 82% | 55,535 psi | 89% | 2254 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,492 psi | 89% | 2260 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,724 psi | 59% | 1375 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,188 psi | 90% | 2274 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,101 psi | 90% | 2326 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,463 psi | 89% | 2356 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,374 psi | 86% | 2320 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,695 psi | 89% | 2388 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 37,985 psi | 61% | 2185 fps | 97% |
| Rottweil R 902 | <<locked>> | 86% | 56,159 psi | 90% | 2221 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,550 psi | 89% | 2260 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 53,156 psi | 85% | 2264 fps | 97.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,852 psi | 85% | 2313 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 92% | 55,303 psi | 89% | 2260 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 53,447 psi | 86% | 2238 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 53,577 psi | 86% | 2208 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,186 psi | 87% | 2215 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,418 psi | 87% | 2270 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,548 psi | 86% | 2274 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,491 psi | 87% | 2241 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,143 psi | 88% | 2251 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,476 psi | 86% | 2123 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,882 psi | 86% | 2129 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 53,113 psi | 85% | 2198 fps | 99.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,373 psi | 84% | 2310 fps | 98.8% |
| Somchem S335 | <<locked>> | 84% | 56,318 psi | 90% | 2162 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,940 psi | 86% | 2224 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,622 psi | 89% | 2257 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 54,853 psi | 88% | 2264 fps | 97.1% |
| Somchem S365 | <<locked>> | 98% | 54,781 psi | 88% | 2326 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,505 psi | 86% | 2293 fps | 99.3% |
| Unknown powder | <<locked>> | 92% | 53,577 psi | 86% | 2290 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 53,940 psi | 86% | 2110 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 52,997 psi | 85% | 2146 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,316 psi | 85% | 2162 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,548 psi | 86% | 2198 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,042 psi | 88% | 2280 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,253 psi | 74% | 2188 fps | 98% |
| Vihtavuori N530 | <<locked>> | 82% | 56,086 psi | 90% | 2221 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,766 psi | 88% | 2205 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,867 psi | 86% | 2287 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,966 psi | 80% | 2293 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2343 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,520 psi | 87% | 2257 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,969 psi | 87% | 2316 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,059 psi | 64% | 2277 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,651 psi | 89% | 2313 fps | 98.9% |
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% | 47,282 psi | 76% | 2087 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,031 psi | 66% | 2024 fps | 97% |
| Accurate 3100 | <<locked>> | 86% | 29,849 psi | 48% | 1923 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 44,773 psi | 72% | 2096 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,605 psi | 54% | 1998 fps | 98.5% |
| ADI AR 2206H | <<locked>> | 80% | 50,328 psi | 81% | 2192 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,859 psi | 69% | 2080 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 37,608 psi | 60% | 2070 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 43,178 psi | 69% | 2188 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,431 psi | 84% | 2185 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,311 psi | 74% | 2247 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,946 psi | 69% | 2096 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,934 psi | 74% | 2152 fps | 100% |
| Alliant Reloder-16 | 46.8 gr | 80% | 33,330 psi | 53% | 2008 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,188 psi | 60% | 2103 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 37,173 psi | 60% | 2067 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 36,796 psi | 59% | 2103 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,250 psi | 39% | 1821 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 90% | 29,080 psi | 47% | 1955 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 82% | 27,238 psi | 44% | 1952 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,617 psi | 80% | 2205 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 38,653 psi | 62% | 2139 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 42,888 psi | 69% | 2106 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 36,796 psi | 59% | 2103 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 38,247 psi | 61% | 2011 fps | 96.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,721 psi | 83% | 2211 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,381 psi | 70% | 2116 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 38,493 psi | 62% | 2090 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 82% | 37,942 psi | 61% | 2034 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 45,223 psi | 73% | 2182 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 50,894 psi | 82% | 2198 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,806 psi | 49% | 1923 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,382 psi | 71% | 2149 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 36,172 psi | 58% | 2142 fps | 95% |
| Hodgdon Superformance | 53.3 gr | 80% | 34,534 psi | 55% | 2041 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 43% | 1198 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,121 psi | 72% | 2110 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,021 psi | 75% | 2123 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,076 psi | 67% | 2060 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,423 psi | 66% | 2037 fps | 97.9% |
| IMR 4350 | <<locked>> | 80% | 33,982 psi | 54% | 1952 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,639 psi | 64% | 2034 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 29,501 psi | 47% | 1900 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 47,108 psi | 76% | 2172 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 45,469 psi | 73% | 2152 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 43,903 psi | 70% | 2215 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 52,431 psi | 84% | 2185 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,995 psi | 80% | 2169 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,748 psi | 80% | 2133 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,179 psi | 72% | 2103 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,101 psi | 59% | 1995 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 35,273 psi | 57% | 1978 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 28,848 psi | 46% | 1900 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 49,197 psi | 79% | 2146 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,763 psi | 80% | 2142 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,310 psi | 73% | 2142 fps | 100% |
| Norma 204 | <<locked>> | 84% | 37,811 psi | 61% | 2060 fps | 95.1% |
| Norma MRP | <<locked>> | 88% | 33,692 psi | 54% | 2070 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 33,591 psi | 54% | 1995 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 45,034 psi | 72% | 2159 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,105 psi | 69% | 2211 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 32,590 psi | 52% | 1985 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 94% | 37,115 psi | 60% | 2096 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 52,069 psi | 83% | 2211 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,185 psi | 84% | 2224 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,485 psi | 44% | 1227 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,555 psi | 70% | 2103 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,950 psi | 78% | 2238 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,581 psi | 63% | 2142 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,141 psi | 53% | 2014 fps | 98.1% |
| ReloadSwiss RS 70 | 51.2 gr | 80% | 32,677 psi | 52% | 2018 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 35,505 psi | 57% | 2133 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 46,847 psi | 75% | 2106 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,292 psi | 65% | 2064 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 41,481 psi | 67% | 2096 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 35,955 psi | 58% | 2051 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 38,247 psi | 61% | 2011 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,101 psi | 59% | 1995 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,995 psi | 80% | 2169 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,179 psi | 72% | 2103 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,273 psi | 57% | 1978 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,249 psi | 66% | 2110 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,937 psi | 82% | 2195 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,588 psi | 78% | 2169 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,430 psi | 81% | 2090 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,395 psi | 68% | 1991 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,347 psi | 58% | 1952 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 38,000 psi | 61% | 2090 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 49,879 psi | 80% | 2090 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,473 psi | 81% | 2182 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,930 psi | 66% | 2064 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 45,179 psi | 72% | 2133 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 30,211 psi | 48% | 1962 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 34,156 psi | 55% | 1995 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 36,448 psi | 58% | 2037 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 80% | 50,923 psi | 82% | 2077 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,050 psi | 75% | 2080 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,036 psi | 75% | 2090 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,914 psi | 62% | 2008 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,085 psi | 56% | 1995 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 35,882 psi | 58% | 2021 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 52,678 psi | 84% | 2182 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,368 psi | 73% | 2090 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,432 psi | 55% | 1998 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 26,165 psi | 42% | 1880 fps | 96.6% |
| Vihtavuori N560 | <<locked>> | 96% | 44,570 psi | 71% | 2247 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,258 psi | 55% | 1972 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 38,493 psi | 62% | 2090 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 22,727 psi | 36% | 1844 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 90% | 39,349 psi | 63% | 2083 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 118 powders for .338 Win Mag. loaded with the .338 | 300gr | Nosler Custom Competition. Alliant Reloder-26 delivers the highest muzzle velocity at 2,388 fps; across all powders the maximum-charge window runs from 1,342 fps to 2,388 fps. Accurate 3100 gives the best case fill at 100 %, and 118 of the 118 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.338" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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, Alliant Reloder-16 rank at the top here: for .338 Win Mag. with the .338 | 300gr | Nosler Custom Competition they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2217, ADI AR 2225 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.