Load Specifications
Bullet:.338 | 250gr | Hornady BTHP
Bullet Manufacturer:Hornady
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338-06 A-Square load data
Case Length (l3):2.494"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:69 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:63,091 psi
Recommended Twist Rate:1:12.5
Load data in caliber .338-06 A-Square with .338 | 250gr | Hornady BTHP bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon LEVERevolution.
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 2015 | <<locked>> | 92% | 56,579 psi | 90% | 2287 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,693 psi | 85% | 2329 fps | 99.2% |
| Accurate 2230 | <<locked>> | 82% | 54,476 psi | 86% | 2343 fps | 99.4% |
| Accurate 2460 | <<locked>> | 88% | 55,303 psi | 88% | 2316 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 56,884 psi | 90% | 2343 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 56,405 psi | 89% | 2365 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 56,130 psi | 89% | 2375 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 41,611 psi | 66% | 2251 fps | 97% |
| Accurate LT-30 | <<locked>> | 84% | 53,969 psi | 86% | 2208 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,404 psi | 86% | 2228 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 55,622 psi | 88% | 2372 fps | 99.7% |
| ADI AR 2207 | <<locked>> | 82% | 55,332 psi | 88% | 2221 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 56,420 psi | 89% | 2365 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 84% | 53,751 psi | 85% | 2310 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,042 psi | 87% | 2333 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 54,201 psi | 86% | 2313 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 56,463 psi | 89% | 2421 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 54,868 psi | 87% | 2464 fps | 99.4% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 55,158 psi | 87% | 2382 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 56,782 psi | 90% | 2293 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 56,202 psi | 89% | 2398 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,685 psi | 68% | 2260 fps | 97.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,907 psi | 78% | 2388 fps | 99.5% |
| Alliant Reloder-7 | <<locked>> | 82% | 56,246 psi | 89% | 2238 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 56,159 psi | 89% | 2251 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 55,201 psi | 87% | 2385 fps | 99.2% |
| Bofors RP3ᴾ | <<locked>> | 100% | 55,419 psi | 88% | 2395 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,998 psi | 86% | 2280 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 53,301 psi | 84% | 2362 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 55,347 psi | 88% | 2441 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 88% | 55,956 psi | 89% | 2333 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 57,058 psi | 90% | 2362 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 53,940 psi | 85% | 2362 fps | 98.5% |
| Hodgdon H4198 | <<locked>> | 82% | 55,767 psi | 88% | 2244 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 56,057 psi | 89% | 2382 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,899 psi | 62% | 2165 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 54,056 psi | 86% | 2405 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,316 psi | 54% | 1362 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 54,012 psi | 86% | 2339 fps | 99.8% |
| IMR 3031 | <<locked>> | 94% | 54,839 psi | 87% | 2362 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 55,782 psi | 88% | 2349 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 94% | 53,650 psi | 85% | 2290 fps | 96.3% |
| IMR 4198 | <<locked>> | 86% | 54,070 psi | 86% | 2221 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 52,301 psi | 83% | 2303 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,292 psi | 64% | 2211 fps | 96.6% |
| IMR 4895 | <<locked>> | 96% | 53,983 psi | 86% | 2385 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 92% | 55,042 psi | 87% | 2333 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 55,274 psi | 88% | 2323 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 55,303 psi | 88% | 2326 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 54,360 psi | 86% | 2352 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 56,014 psi | 89% | 2310 fps | 99.7% |
| Lovex S062 | <<locked>> | 98% | 54,998 psi | 87% | 2346 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 47,601 psi | 75% | 2254 fps | 96.6% |
| Norma 200 | <<locked>> | 84% | 56,869 psi | 90% | 2274 fps | 100% |
| Norma 201 | <<locked>> | 94% | 54,375 psi | 86% | 2326 fps | 100% |
| Norma 202 | <<locked>> | 94% | 54,404 psi | 86% | 2329 fps | 100% |
| Norma 203B | <<locked>> | 98% | 55,274 psi | 88% | 2388 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 42,467 psi | 67% | 2254 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 98% | 55,579 psi | 88% | 2411 fps | 99.7% |
| Ramshot TAC | <<locked>> | 92% | 55,666 psi | 88% | 2349 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 92% | 54,549 psi | 86% | 2365 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 90% | 56,623 psi | 90% | 2343 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,824 psi | 55% | 1398 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,013 psi | 87% | 2323 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 54,520 psi | 86% | 2343 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 56,144 psi | 89% | 2457 fps | 99.6% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,330 psi | 83% | 2441 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 41,727 psi | 66% | 2267 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 92% | 55,303 psi | 88% | 2310 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,665 psi | 87% | 2323 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 51,692 psi | 82% | 2343 fps | 99.8% |
| Shooters World AR Plus | <<locked>> | 82% | 55,274 psi | 88% | 2323 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 47,601 psi | 75% | 2254 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 94% | 54,360 psi | 86% | 2352 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 54,998 psi | 87% | 2346 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 55,042 psi | 87% | 2300 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,723 psi | 87% | 1998 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,215 psi | 86% | 2323 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,621 psi | 85% | 2395 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 54,563 psi | 86% | 2274 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 53,548 psi | 85% | 2329 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,983 psi | 86% | 2349 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 56,927 psi | 90% | 2280 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 55,825 psi | 88% | 2270 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 56,434 psi | 89% | 2369 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 55,666 psi | 88% | 2277 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 56,637 psi | 90% | 2369 fps | 99.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,330 psi | 83% | 2339 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,623 psi | 60% | 2208 fps | 98.8% |
| Vihtavuori N120 | <<locked>> | 82% | 55,201 psi | 87% | 2175 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 56,637 psi | 90% | 2251 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 56,652 psi | 90% | 2267 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 56,608 psi | 90% | 2329 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 54,853 psi | 87% | 2310 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,792 psi | 81% | 2290 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,802 psi | 71% | 2251 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 92% | 55,724 psi | 88% | 2336 fps | 100% |
| Vihtavuori N540 | <<locked>> | 98% | 56,666 psi | 90% | 2352 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 43,439 psi | 69% | 2254 fps | 96.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,035 psi | 73% | 2244 fps | 99.1% |
| Winchester 748 | <<locked>> | 92% | 54,462 psi | 86% | 2375 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 56,971 psi | 90% | 2398 fps | 99.9% |
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 2015 | <<locked>> | 80% | 39,204 psi | 62% | 2067 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,299 psi | 80% | 2283 fps | 98.8% |
| Accurate 2230 | <<locked>> | 80% | 50,923 psi | 81% | 2297 fps | 99.1% |
| Accurate 2460 | <<locked>> | 80% | 42,438 psi | 67% | 2152 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 31,763 psi | 50% | 1998 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 37,768 psi | 60% | 2113 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 30,052 psi | 48% | 1985 fps | 98.9% |
| Accurate 4350 | <<locked>> | 96% | 36,129 psi | 57% | 2159 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 47,805 psi | 76% | 2136 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,196 psi | 76% | 2152 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 35,955 psi | 57% | 2073 fps | 96.6% |
| ADI AR 2207 | <<locked>> | 80% | 52,156 psi | 83% | 2185 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 34,838 psi | 55% | 2037 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 47,137 psi | 75% | 2228 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,898 psi | 60% | 2087 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 80% | 36,709 psi | 58% | 2090 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,584 psi | 69% | 2241 fps | 99% |
| Alliant Power Pro 2000-MR | 43.7 gr | 84% | 36,985 psi | 59% | 2172 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 29,515 psi | 47% | 1969 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,556 psi | 71% | 2149 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 34,113 psi | 54% | 2057 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 96% | 37,913 psi | 60% | 2172 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,098 psi | 52% | 2103 fps | 95.8% |
| Alliant Reloder-7 | <<locked>> | 80% | 53,084 psi | 84% | 2201 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,412 psi | 74% | 2136 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 37,231 psi | 59% | 2116 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 28,747 psi | 46% | 1965 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,089 psi | 64% | 2083 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,766 psi | 57% | 2100 fps | 98.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 39,392 psi | 62% | 2201 fps | 97.1% |
| Hodgdon H322 | <<locked>> | 80% | 43,207 psi | 68% | 2172 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,671 psi | 69% | 2192 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 38,914 psi | 62% | 2142 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 52,634 psi | 83% | 2208 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 36,143 psi | 57% | 2083 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 32,489 psi | 51% | 2044 fps | 95.6% |
| Hodgdon LEVERevolution | 40.8 gr | 80% | 32,329 psi | 51% | 2054 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,686 psi | 41% | 1217 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,911 psi | 55% | 2044 fps | 96.8% |
| IMR 3031 | <<locked>> | 80% | 34,867 psi | 55% | 2087 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 34,185 psi | 54% | 2018 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 50,430 psi | 80% | 2247 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 45,484 psi | 72% | 2119 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 49,139 psi | 78% | 2260 fps | 95.3% |
| IMR 4831 | <<locked>> | 96% | 35,375 psi | 56% | 2123 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 32,648 psi | 52% | 2041 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 37,898 psi | 60% | 2087 fps | 98.3% |
| Lovex D073.4 | <<locked>> | 80% | 51,430 psi | 82% | 2277 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 42,206 psi | 67% | 2156 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 33,968 psi | 54% | 2057 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 37,101 psi | 59% | 2031 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 31,850 psi | 50% | 1985 fps | 96.8% |
| Lovex S065 | <<locked>> | 96% | 42,221 psi | 67% | 2172 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 50,328 psi | 80% | 2198 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,375 psi | 56% | 2041 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 35,288 psi | 56% | 2054 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 31,357 psi | 50% | 2005 fps | 95.1% |
| Norma URP | <<locked>> | 96% | 37,391 psi | 59% | 2162 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 82% | 32,953 psi | 52% | 2054 fps | 95.2% |
| Ramshot TAC | <<locked>> | 84% | 43,047 psi | 68% | 2172 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,666 psi | 58% | 2096 fps | 96.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,234 psi | 65% | 2126 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,730 psi | 41% | 1243 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,612 psi | 68% | 2159 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 45,107 psi | 71% | 2215 fps | 95.2% |
| ReloadSwiss RS 52 | 41.3 gr | 82% | 35,027 psi | 56% | 2133 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 27,398 psi | 43% | 1972 fps | 95.7% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 39,117 psi | 62% | 2221 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 39,073 psi | 62% | 2083 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 33,605 psi | 53% | 2001 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 28,877 psi | 46% | 1962 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 51,430 psi | 82% | 2277 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 96% | 42,221 psi | 67% | 2172 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,968 psi | 54% | 2057 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 31,850 psi | 50% | 1985 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,049 psi | 71% | 2169 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,996 psi | 82% | 1969 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,529 psi | 75% | 2238 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 32,227 psi | 51% | 2044 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,266 psi | 72% | 2162 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 38,058 psi | 60% | 2100 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,534 psi | 55% | 2047 fps | 96.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,101 psi | 59% | 2014 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,313 psi | 48% | 1906 fps | 99.2% |
| Somchem S321 | <<locked>> | 80% | 40,393 psi | 64% | 2149 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 36,564 psi | 58% | 2021 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 35,288 psi | 56% | 2057 fps | 96.3% |
| Somchem S355 | <<locked>> | 82% | 30,037 psi | 48% | 1969 fps | 95.2% |
| Somchem S365 | <<locked>> | 90% | 27,833 psi | 44% | 1991 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 52,083 psi | 83% | 2142 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,148 psi | 67% | 2073 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,159 psi | 59% | 2014 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,300 psi | 51% | 1998 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,257 psi | 53% | 2001 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 26,760 psi | 42% | 1883 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 94% | 37,144 psi | 59% | 2126 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 37,869 psi | 60% | 2083 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 31,966 psi | 51% | 1991 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 96% | 38,464 psi | 61% | 2172 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 31,357 psi | 50% | 1982 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 36,579 psi | 58% | 2116 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,663 psi | 53% | 2051 fps | 96.6% |
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 102 powders for .338-06 A-Square loaded with the .338 | 250gr | Hornady BTHP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,464 fps; across all powders the maximum-charge window runs from 1,362 fps to 2,464 fps. Accurate 4064 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, Accurate 4350, ADI AR 2208 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 Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon LEVERevolution rank at the top here: for .338-06 A-Square with the .338 | 250gr | Hornady BTHP 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.