Load Specifications
Bullet Manufacturer:Barnes
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:1:13.5
Load data in caliber .338-06 A-Square with .338 | 250gr | Barnes Banded Solid RN bullet and 104 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>> | 90% | 54,404 psi | 86% | 2274 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,824 psi | 87% | 2356 fps | 99.4% |
| Accurate 2230 | <<locked>> | 82% | 55,492 psi | 88% | 2365 fps | 99.6% |
| Accurate 2460 | <<locked>> | 88% | 56,275 psi | 89% | 2336 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 54,636 psi | 87% | 2326 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 54,085 psi | 86% | 2349 fps | 100% |
| Accurate 2700 | <<locked>> | 96% | 55,927 psi | 89% | 2316 fps | 95.9% |
| Accurate 4064 | <<locked>> | 98% | 54,172 psi | 86% | 2362 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,699 psi | 68% | 2277 fps | 97.4% |
| Accurate LT-30 | <<locked>> | 84% | 54,665 psi | 87% | 2228 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 55,143 psi | 87% | 2247 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 56,478 psi | 90% | 2392 fps | 99.8% |
| ADI AR 2207 | <<locked>> | 82% | 56,304 psi | 89% | 2238 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 54,085 psi | 86% | 2346 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 84% | 54,824 psi | 87% | 2329 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,912 psi | 89% | 2352 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 55,434 psi | 88% | 2333 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 54,346 psi | 86% | 2402 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 56,159 psi | 89% | 2493 fps | 99.6% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 56,347 psi | 89% | 2402 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,404 psi | 86% | 2277 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 53,896 psi | 85% | 2382 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,526 psi | 69% | 2283 fps | 97.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 50,067 psi | 79% | 2415 fps | 99.7% |
| Alliant Reloder-7 | <<locked>> | 82% | 57,058 psi | 90% | 2254 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 56,971 psi | 90% | 2267 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 56,289 psi | 89% | 2408 fps | 99.4% |
| Bofors RP3ᴾ | <<locked>> | 100% | 56,927 psi | 90% | 2421 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 90% | 55,216 psi | 88% | 2303 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,505 psi | 86% | 2382 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 56,536 psi | 90% | 2464 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 88% | 57,000 psi | 90% | 2352 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 54,520 psi | 86% | 2339 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 54,984 psi | 87% | 2385 fps | 98.8% |
| Hodgdon H4198 | <<locked>> | 82% | 56,536 psi | 90% | 2264 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 56,927 psi | 90% | 2402 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,755 psi | 63% | 2192 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 55,564 psi | 88% | 2431 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,563 psi | 55% | 1371 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 55,216 psi | 88% | 2365 fps | 99.9% |
| IMR 3031 | <<locked>> | 94% | 56,289 psi | 89% | 2385 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 56,971 psi | 90% | 2372 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 54,665 psi | 87% | 2316 fps | 96.7% |
| IMR 4198 | <<locked>> | 86% | 54,984 psi | 87% | 2241 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 53,200 psi | 84% | 2326 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,205 psi | 65% | 2234 fps | 97% |
| IMR 4895 | <<locked>> | 96% | 55,172 psi | 87% | 2408 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 92% | 55,912 psi | 89% | 2352 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 56,376 psi | 89% | 2343 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 56,159 psi | 89% | 2346 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 55,608 psi | 88% | 2375 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,853 psi | 85% | 2293 fps | 99.6% |
| Lovex S062 | <<locked>> | 98% | 56,173 psi | 89% | 2369 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,559 psi | 77% | 2277 fps | 97% |
| Norma 200 | <<locked>> | 82% | 54,520 psi | 86% | 2254 fps | 100% |
| Norma 201 | <<locked>> | 94% | 55,259 psi | 88% | 2346 fps | 100% |
| Norma 202 | <<locked>> | 94% | 55,709 psi | 88% | 2352 fps | 100% |
| Norma 203B | <<locked>> | 98% | 56,391 psi | 89% | 2411 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 43,410 psi | 69% | 2277 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 98% | 56,942 psi | 90% | 2438 fps | 99.8% |
| Ramshot TAC | <<locked>> | 92% | 56,637 psi | 90% | 2372 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,680 psi | 88% | 2388 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 88% | 54,085 psi | 86% | 2320 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,795 psi | 55% | 1404 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,985 psi | 89% | 2346 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 55,840 psi | 89% | 2369 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,795 psi | 85% | 2438 fps | 99.5% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,476 psi | 85% | 2467 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,830 psi | 68% | 2293 fps | 96.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 44,411 psi | 70% | 2310 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 92% | 56,666 psi | 90% | 2333 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 55,564 psi | 88% | 2343 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,852 psi | 84% | 2365 fps | 99.9% |
| Shooters World AR Plus | <<locked>> | 82% | 56,376 psi | 89% | 2343 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,559 psi | 77% | 2277 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 94% | 55,608 psi | 88% | 2375 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 56,173 psi | 89% | 2369 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 55,941 psi | 89% | 2320 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,419 psi | 88% | 2014 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 55,187 psi | 87% | 2339 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,940 psi | 87% | 2421 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 55,390 psi | 88% | 2293 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,665 psi | 87% | 2352 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 55,056 psi | 87% | 2372 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,694 psi | 87% | 2264 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 56,956 psi | 90% | 2290 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,853 psi | 85% | 2349 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 56,478 psi | 90% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,809 psi | 85% | 2343 fps | 99.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,505 psi | 85% | 2362 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,696 psi | 61% | 2238 fps | 99.1% |
| Vihtavuori N120 | <<locked>> | 82% | 56,144 psi | 89% | 2192 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 54,549 psi | 86% | 2234 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,505 psi | 86% | 2251 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 54,418 psi | 86% | 2313 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 55,999 psi | 89% | 2329 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,822 psi | 82% | 2310 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,701 psi | 72% | 2274 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 92% | 56,623 psi | 90% | 2356 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 54,259 psi | 86% | 2333 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,599 psi | 71% | 2280 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,963 psi | 74% | 2267 fps | 99.3% |
| Winchester 748 | <<locked>> | 92% | 55,695 psi | 88% | 2398 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 54,520 psi | 86% | 2379 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% | 40,016 psi | 63% | 2087 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,401 psi | 81% | 2310 fps | 99% |
| Accurate 2230 | <<locked>> | 80% | 51,967 psi | 82% | 2320 fps | 99.3% |
| Accurate 2460 | <<locked>> | 80% | 43,439 psi | 69% | 2175 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 32,532 psi | 52% | 2018 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 38,479 psi | 61% | 2133 fps | 99.6% |
| Accurate 2700 | <<locked>> | 94% | 52,562 psi | 83% | 2277 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 30,806 psi | 49% | 2005 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 34,708 psi | 55% | 2139 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 48,559 psi | 77% | 2152 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,950 psi | 78% | 2172 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,811 psi | 58% | 2096 fps | 97% |
| ADI AR 2207 | <<locked>> | 80% | 53,142 psi | 84% | 2205 fps | 100% |
| ADI AR 2208 | <<locked>> | 82% | 33,446 psi | 53% | 2018 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 48,211 psi | 76% | 2251 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,812 psi | 62% | 2110 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 37,550 psi | 60% | 2110 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,744 psi | 71% | 2267 fps | 99.2% |
| Alliant Power Pro 2000-MR | 43.5 gr | 82% | 35,230 psi | 56% | 2142 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,182 psi | 48% | 1988 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,440 psi | 72% | 2165 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 32,808 psi | 52% | 2037 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 36,477 psi | 58% | 2152 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 31,734 psi | 50% | 2080 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 53,998 psi | 86% | 2221 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 47,239 psi | 75% | 2156 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 35,491 psi | 56% | 2090 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 29,385 psi | 47% | 1985 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,959 psi | 65% | 2106 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,637 psi | 58% | 2123 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 40,234 psi | 64% | 2228 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 80% | 43,976 psi | 70% | 2192 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,628 psi | 71% | 2215 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 37,260 psi | 59% | 2119 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 80% | 53,447 psi | 85% | 2228 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 37,072 psi | 59% | 2106 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 31,111 psi | 49% | 2021 fps | 95.3% |
| Hodgdon LEVERevolution | 41.6 gr | 80% | 32,851 psi | 52% | 2070 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,570 psi | 41% | 1220 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,563 psi | 56% | 2064 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 35,679 psi | 57% | 2106 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 32,837 psi | 52% | 1998 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 48,370 psi | 77% | 2231 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 46,151 psi | 73% | 2136 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 47,398 psi | 75% | 2247 fps | 95% |
| IMR 4831 | <<locked>> | 96% | 36,289 psi | 58% | 2149 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 33,547 psi | 53% | 2064 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 80% | 38,812 psi | 62% | 2110 fps | 98.6% |
| Lovex D073.4 | <<locked>> | 80% | 52,533 psi | 83% | 2300 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 43,149 psi | 68% | 2178 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 34,896 psi | 55% | 2080 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 37,739 psi | 60% | 2051 fps | 97.2% |
| Lovex S062 | <<locked>> | 80% | 32,518 psi | 52% | 2008 fps | 97.2% |
| Lovex S065 | <<locked>> | 94% | 40,611 psi | 64% | 2152 fps | 95% |
| Norma 200 | <<locked>> | 80% | 51,271 psi | 81% | 2218 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,056 psi | 57% | 2060 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 35,969 psi | 57% | 2073 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 32,213 psi | 51% | 2031 fps | 95.6% |
| Norma URP | <<locked>> | 94% | 35,940 psi | 57% | 2142 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 82% | 33,678 psi | 53% | 2077 fps | 95.7% |
| Ramshot TAC | <<locked>> | 82% | 41,234 psi | 65% | 2149 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,492 psi | 59% | 2119 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,771 psi | 66% | 2146 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,875 psi | 41% | 1253 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,294 psi | 69% | 2175 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 46,093 psi | 73% | 2238 fps | 95.6% |
| ReloadSwiss RS 52 | 41.2 gr | 80% | 33,634 psi | 53% | 2110 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,007 psi | 44% | 1995 fps | 96.3% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 37,536 psi | 59% | 2201 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 41,495 psi | 66% | 2260 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 39,871 psi | 63% | 2103 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 34,272 psi | 54% | 2021 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 29,515 psi | 47% | 1982 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 52,533 psi | 83% | 2300 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 94% | 40,611 psi | 64% | 2152 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,896 psi | 55% | 2080 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 32,518 psi | 52% | 2008 fps | 97.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,977 psi | 73% | 2192 fps | 99.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,707 psi | 84% | 1985 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,457 psi | 77% | 2257 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 32,909 psi | 52% | 2067 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,195 psi | 73% | 2182 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 38,856 psi | 62% | 2119 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,331 psi | 56% | 2070 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,826 psi | 60% | 2034 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,922 psi | 49% | 1926 fps | 99.4% |
| Somchem S321 | <<locked>> | 80% | 41,263 psi | 65% | 2172 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 37,260 psi | 59% | 2037 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 36,085 psi | 57% | 2080 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 30,835 psi | 49% | 1995 fps | 95.6% |
| Somchem S365 | <<locked>> | 90% | 28,369 psi | 45% | 2014 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 53,040 psi | 84% | 2159 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,902 psi | 68% | 2093 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,869 psi | 60% | 2034 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,083 psi | 52% | 2018 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,953 psi | 54% | 2021 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 27,311 psi | 43% | 1903 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 94% | 37,782 psi | 60% | 2146 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 38,551 psi | 61% | 2103 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 32,561 psi | 52% | 2011 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 36,985 psi | 59% | 2152 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 31,981 psi | 51% | 2005 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 37,217 psi | 59% | 2136 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,214 psi | 54% | 2067 fps | 96.9% |
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 104 powders for .338-06 A-Square loaded with the .338 | 250gr | Barnes Banded Solid RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,493 fps; across all powders the maximum-charge window runs from 1,371 fps to 2,493 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder- TS 15.5, Alliant Reloder-16 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 | Barnes Banded Solid RN 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.