Load Specifications
Bullet:.338 | 300gr | Hornady HPBT
Bullet Manufacturer:Hornady
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 | Hornady HPBT bullet and 113 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-17.
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% | 54,317 psi | 87% | 2172 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,086 psi | 90% | 2241 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,327 psi | 77% | 2231 fps | 99.7% |
| Accurate 4064 | <<locked>> | 86% | 54,534 psi | 87% | 2218 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,679 psi | 88% | 2313 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 52,707 psi | 85% | 2398 fps | 98.2% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 49,777 psi | 80% | 2343 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 82% | 53,983 psi | 87% | 2241 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,042 psi | 88% | 2247 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,738 psi | 89% | 2352 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 49,893 psi | 80% | 2300 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,188 psi | 90% | 2234 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,867 psi | 86% | 2352 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,463 psi | 89% | 2349 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,535 psi | 89% | 2264 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,043 psi | 90% | 2287 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,288 psi | 89% | 2352 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 52,953 psi | 85% | 2336 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,636 psi | 88% | 2343 fps | 99% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,269 psi | 77% | 2303 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,556 psi | 73% | 2251 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,958 psi | 64% | 2192 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,503 psi | 83% | 2405 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 53,563 psi | 86% | 2260 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 44,222 psi | 71% | 2241 fps | 97.3% |
| Bofors RP3 | <<locked>> | 88% | 56,347 psi | 90% | 2280 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,269 psi | 77% | 2303 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 55,883 psi | 90% | 2274 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,941 psi | 90% | 2267 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 53,272 psi | 85% | 2254 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 53,447 psi | 86% | 2316 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 90% | 53,722 psi | 86% | 2280 fps | 99% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 53,519 psi | 86% | 2303 fps | 97.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 52,344 psi | 84% | 2290 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 82% | 54,549 psi | 87% | 2247 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,405 psi | 89% | 2287 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,346 psi | 87% | 2280 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 38,972 psi | 62% | 2211 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 92% | 53,142 psi | 85% | 2349 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 58% | 1348 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,709 psi | 89% | 2251 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,347 psi | 89% | 2224 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,520 psi | 87% | 2231 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,143 psi | 87% | 2224 fps | 99.6% |
| IMR 4350 | <<locked>> | 94% | 52,924 psi | 85% | 2257 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,317 psi | 87% | 2254 fps | 99.6% |
| IMR 4831 | <<locked>> | 96% | 55,027 psi | 88% | 2306 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,056 psi | 87% | 2267 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 55,332 psi | 89% | 2293 fps | 97.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 47,427 psi | 76% | 2277 fps | 96.6% |
| IMR 8208 XBR | <<locked>> | 82% | 56,188 psi | 90% | 2234 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,288 psi | 87% | 2221 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,330 psi | 86% | 2182 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,868 psi | 88% | 2228 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 53,969 psi | 87% | 2251 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 54,940 psi | 88% | 2283 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,277 psi | 65% | 2116 fps | 98.7% |
| Norma 201 | <<locked>> | 84% | 56,130 psi | 90% | 2231 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,461 psi | 86% | 2192 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,259 psi | 89% | 2274 fps | 100% |
| Norma 204 | <<locked>> | 94% | 53,330 psi | 86% | 2303 fps | 98.6% |
| Norma MRPᴾ | <<locked>> | 100% | 50,995 psi | 82% | 2369 fps | 99.6% |
| Norma URP | <<locked>> | 94% | 53,374 psi | 86% | 2300 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 55,767 psi | 89% | 2300 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 47,152 psi | 76% | 2283 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 96% | 55,637 psi | 89% | 2349 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 41,887 psi | 67% | 2188 fps | 97.4% |
| Ramshot TAC | <<locked>> | 82% | 56,376 psi | 90% | 2270 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,376 psi | 90% | 2277 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,825 psi | 59% | 1381 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,417 psi | 86% | 2247 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,301 psi | 85% | 2300 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,333 psi | 90% | 2369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,186 psi | 87% | 2336 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 52,968 psi | 85% | 2359 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 38,421 psi | 62% | 2201 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 84% | 53,461 psi | 86% | 2195 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,246 psi | 90% | 2274 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 53,882 psi | 86% | 2280 fps | 97.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 2329 fps | 99% |
| Rottweil R 907 | <<locked>> | 92% | 55,883 psi | 90% | 2274 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 53,969 psi | 87% | 2251 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,288 psi | 87% | 2221 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,868 psi | 88% | 2228 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,940 psi | 88% | 2283 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,143 psi | 87% | 2287 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,085 psi | 88% | 2251 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,796 psi | 89% | 2264 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,940 psi | 86% | 2136 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,549 psi | 87% | 2139 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 53,896 psi | 86% | 2215 fps | 99.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,185 psi | 85% | 2323 fps | 98.9% |
| Somchem S335 | <<locked>> | 82% | 53,664 psi | 86% | 2136 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,563 psi | 87% | 2238 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,289 psi | 90% | 2270 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 55,695 psi | 89% | 2280 fps | 97.4% |
| Somchem S365 | <<locked>> | 98% | 55,695 psi | 89% | 2339 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,534 psi | 87% | 2310 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 82% | 54,375 psi | 87% | 2119 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,751 psi | 86% | 2159 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,012 psi | 87% | 2175 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,128 psi | 87% | 2211 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,854 psi | 90% | 2297 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,949 psi | 75% | 2205 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 86% | 55,390 psi | 89% | 2215 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,665 psi | 88% | 2303 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,792 psi | 81% | 2306 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 51,648 psi | 83% | 2362 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,187 psi | 88% | 2270 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 53,679 psi | 86% | 2320 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,843 psi | 65% | 2297 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,753 psi | 89% | 2270 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,981 psi | 82% | 2260 fps | 98.4% |
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% | 48,022 psi | 77% | 2100 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,006 psi | 74% | 2110 fps | 98.2% |
| Accurate 3100 | <<locked>> | 84% | 28,413 psi | 46% | 1893 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 45,484 psi | 73% | 2110 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,011 psi | 55% | 2011 fps | 98.7% |
| Accurate High Country | <<locked>> | 92% | 40,147 psi | 64% | 2201 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 98% | 46,717 psi | 75% | 2297 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 50,763 psi | 81% | 2201 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,294 psi | 69% | 2093 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 38,072 psi | 61% | 2083 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 43,772 psi | 70% | 2205 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,852 psi | 85% | 2195 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,934 psi | 75% | 2260 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 38,043 psi | 61% | 2087 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,366 psi | 70% | 2110 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,369 psi | 74% | 2162 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,852 psi | 54% | 2021 fps | 98.9% |
| Alliant Reloder-17 | 51.1 gr | 80% | 37,753 psi | 61% | 2119 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 37,623 psi | 60% | 2080 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 37,246 psi | 60% | 2119 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,671 psi | 40% | 1837 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 90% | 29,414 psi | 47% | 1969 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 82% | 27,615 psi | 44% | 1965 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,198 psi | 80% | 2218 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 36,753 psi | 59% | 2110 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 43,526 psi | 70% | 2123 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 37,246 psi | 60% | 2119 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 38,624 psi | 62% | 2021 fps | 96.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,373 psi | 84% | 2224 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,976 psi | 71% | 2129 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 36,100 psi | 58% | 2051 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 39,320 psi | 63% | 2064 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 96% | 46,862 psi | 75% | 2211 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 45,861 psi | 74% | 2198 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 51,343 psi | 82% | 2208 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,198 psi | 50% | 1936 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,732 psi | 77% | 2201 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 36,695 psi | 59% | 2162 fps | 95.4% |
| Hodgdon Superformance | 54 gr | 80% | 34,954 psi | 56% | 2057 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,035 psi | 43% | 1201 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,240 psi | 79% | 2172 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,909 psi | 83% | 2185 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,484 psi | 73% | 2116 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,732 psi | 77% | 2139 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 34,490 psi | 55% | 1969 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,958 psi | 64% | 2044 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 32,924 psi | 53% | 1978 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 47,558 psi | 76% | 2185 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 45,905 psi | 74% | 2165 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 44,280 psi | 71% | 2228 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 52,852 psi | 85% | 2195 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,734 psi | 81% | 2182 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,169 psi | 80% | 2142 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,643 psi | 73% | 2113 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,666 psi | 60% | 2011 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 35,824 psi | 57% | 1995 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 29,341 psi | 47% | 1913 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 49,893 psi | 80% | 2159 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,241 psi | 81% | 2152 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,745 psi | 73% | 2152 fps | 100% |
| Norma 204 | <<locked>> | 84% | 38,305 psi | 61% | 2073 fps | 95.4% |
| Norma MRP | <<locked>> | 86% | 32,097 psi | 51% | 2041 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,171 psi | 55% | 2011 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 45,672 psi | 73% | 2172 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 41,176 psi | 66% | 2185 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 33,069 psi | 53% | 2001 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 96% | 36,405 psi | 58% | 2093 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 52,620 psi | 84% | 2224 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,808 psi | 85% | 2238 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,485 psi | 44% | 1230 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,135 psi | 71% | 2119 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,719 psi | 80% | 2254 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,132 psi | 64% | 2159 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,721 psi | 54% | 2028 fps | 98.4% |
| ReloadSwiss RS 70 | 51.9 gr | 80% | 33,112 psi | 53% | 2034 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 33,649 psi | 54% | 2096 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 47,500 psi | 76% | 2123 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,973 psi | 66% | 2077 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 41,989 psi | 67% | 2110 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 88% | 36,463 psi | 58% | 2067 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 38,624 psi | 62% | 2021 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,666 psi | 60% | 2011 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,734 psi | 81% | 2182 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,643 psi | 73% | 2113 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,824 psi | 57% | 1995 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,829 psi | 67% | 2123 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,547 psi | 83% | 2208 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,211 psi | 79% | 2182 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,879 psi | 82% | 2100 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,830 psi | 69% | 2001 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,709 psi | 59% | 1962 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 36,129 psi | 58% | 2060 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 50,575 psi | 81% | 2103 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,068 psi | 82% | 2195 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,568 psi | 67% | 2080 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 45,774 psi | 73% | 2149 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 30,763 psi | 49% | 1978 fps | 99.9% |
| Somchem S385 | <<locked>> | 86% | 34,664 psi | 56% | 2011 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 51,401 psi | 82% | 2087 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,587 psi | 76% | 2090 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,718 psi | 77% | 2103 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,508 psi | 63% | 2024 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,462 psi | 57% | 2005 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 92% | 36,303 psi | 58% | 2034 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 45,963 psi | 74% | 2103 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,012 psi | 56% | 2011 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 26,643 psi | 43% | 1893 fps | 97% |
| Vihtavuori N560 | <<locked>> | 96% | 45,150 psi | 72% | 2264 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,679 psi | 56% | 1985 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 36,100 psi | 58% | 2051 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 21,654 psi | 35% | 1808 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,081 psi | 79% | 2188 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 38,928 psi | 62% | 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 113 powders for .338 Win Mag. loaded with the .338 | 300gr | Hornady HPBT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,405 fps; across all powders the maximum-charge window runs from 1,348 fps to 2,405 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 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 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 High Country, Accurate MAGPRO 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-17 rank at the top here: for .338 Win Mag. with the .338 | 300gr | Hornady HPBT 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.