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:1:14.5
Load data in caliber .338-06 A-Square with .338 | 250gr | Barnes Banded Solid bullet and 105 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 CFE223.
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% | 55,405 psi | 88% | 2290 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 55,840 psi | 89% | 2379 fps | 99.5% |
| Accurate 2230 | <<locked>> | 82% | 56,768 psi | 90% | 2392 fps | 99.7% |
| Accurate 2460 | <<locked>> | 86% | 54,041 psi | 86% | 2320 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 55,883 psi | 89% | 2346 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 55,274 psi | 88% | 2369 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 53,447 psi | 85% | 2300 fps | 95.7% |
| Accurate 4064 | <<locked>> | 98% | 55,434 psi | 88% | 2382 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,034 psi | 70% | 2306 fps | 97.8% |
| Accurate LT-30 | <<locked>> | 84% | 55,651 psi | 88% | 2247 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,057 psi | 89% | 2267 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 54,230 psi | 86% | 2375 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 98% | 55,071 psi | 87% | 2369 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 84% | 56,202 psi | 89% | 2352 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 57,029 psi | 90% | 2375 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 56,869 psi | 90% | 2352 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 55,390 psi | 88% | 2425 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 53,592 psi | 85% | 2470 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 54,302 psi | 86% | 2388 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 55,492 psi | 88% | 2297 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 55,259 psi | 88% | 2408 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,570 psi | 71% | 2313 fps | 98% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 51,111 psi | 81% | 2441 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 54,418 psi | 86% | 2251 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 53,882 psi | 85% | 2388 fps | 99.2% |
| Bofors RP3 | <<locked>> | 98% | 54,418 psi | 86% | 2402 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 52,344 psi | 83% | 2326 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 55,985 psi | 89% | 2323 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 55,869 psi | 89% | 2408 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 53,896 psi | 85% | 2444 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 86% | 54,433 psi | 86% | 2333 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 55,666 psi | 88% | 2362 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 56,333 psi | 89% | 2411 fps | 99% |
| Hodgdon H4895 | <<locked>> | 92% | 54,665 psi | 87% | 2382 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,857 psi | 65% | 2218 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 56,869 psi | 90% | 2454 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,780 psi | 55% | 1385 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 56,246 psi | 89% | 2385 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 54,070 psi | 86% | 2372 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 54,592 psi | 87% | 2356 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,579 psi | 88% | 2339 fps | 97% |
| IMR 4198 | <<locked>> | 86% | 56,115 psi | 89% | 2260 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 54,404 psi | 86% | 2356 fps | 96.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,380 psi | 67% | 2264 fps | 97.5% |
| IMR 4895 | <<locked>> | 96% | 56,666 psi | 90% | 2434 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 92% | 57,029 psi | 90% | 2375 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 53,911 psi | 85% | 2329 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 56,797 psi | 90% | 2395 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 54,882 psi | 87% | 2316 fps | 99.8% |
| Lovex S062 | <<locked>> | 96% | 53,882 psi | 85% | 2352 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 49,763 psi | 79% | 2303 fps | 97.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,253 psi | 75% | 2287 fps | 95.7% |
| Norma 200 | <<locked>> | 82% | 55,361 psi | 88% | 2270 fps | 100% |
| Norma 201 | <<locked>> | 94% | 56,362 psi | 89% | 2369 fps | 100% |
| Norma 202 | <<locked>> | 94% | 56,898 psi | 90% | 2375 fps | 100% |
| Norma 203B | <<locked>> | 96% | 54,389 psi | 86% | 2398 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 44,512 psi | 71% | 2303 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 96% | 54,737 psi | 87% | 2421 fps | 99.7% |
| Ramshot TAC | <<locked>> | 90% | 54,259 psi | 86% | 2352 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 92% | 56,608 psi | 90% | 2411 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 88% | 55,042 psi | 87% | 2343 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,983 psi | 55% | 1414 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 53,476 psi | 85% | 2323 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 57,014 psi | 90% | 2395 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 54,940 psi | 87% | 2464 fps | 99.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 54,621 psi | 87% | 2493 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 43,859 psi | 70% | 2323 fps | 97.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 45,295 psi | 72% | 2339 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 90% | 54,230 psi | 86% | 2313 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 56,681 psi | 90% | 2365 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 54,259 psi | 86% | 2392 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 52,344 psi | 83% | 2326 fps | 95.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 49,763 psi | 79% | 2303 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 94% | 56,797 psi | 90% | 2395 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 53,882 psi | 85% | 2352 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,253 psi | 75% | 2287 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 57,072 psi | 90% | 2343 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,347 psi | 89% | 2031 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 56,347 psi | 89% | 2362 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 56,188 psi | 89% | 2448 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 56,550 psi | 90% | 2313 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 55,941 psi | 89% | 2379 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 55,999 psi | 89% | 2395 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 55,521 psi | 88% | 2283 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 54,853 psi | 87% | 2277 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 49,893 psi | 79% | 2264 fps | 96% |
| Somchem S321 | <<locked>> | 88% | 54,853 psi | 87% | 2372 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 54,288 psi | 86% | 2280 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 55,129 psi | 87% | 2369 fps | 99.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 54,853 psi | 87% | 2388 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,436 psi | 63% | 2260 fps | 99.4% |
| Vihtavuori N120 | <<locked>> | 82% | 57,014 psi | 90% | 2211 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 55,521 psi | 88% | 2254 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 55,376 psi | 88% | 2270 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 55,666 psi | 88% | 2333 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 53,708 psi | 85% | 2313 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 53,156 psi | 84% | 2336 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 46,833 psi | 74% | 2303 fps | 98% |
| Vihtavuori N530 | <<locked>> | 90% | 54,244 psi | 86% | 2336 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 55,158 psi | 87% | 2352 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 45,701 psi | 72% | 2306 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,095 psi | 76% | 2297 fps | 99.5% |
| Winchester 748 | <<locked>> | 92% | 56,797 psi | 90% | 2418 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 48,080 psi | 76% | 2352 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 94% | 55,883 psi | 89% | 2405 fps | 100% |
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% | 41,017 psi | 65% | 2110 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,460 psi | 83% | 2336 fps | 99.2% |
| Accurate 2230 | <<locked>> | 80% | 52,982 psi | 84% | 2343 fps | 99.5% |
| Accurate 2460 | <<locked>> | 80% | 44,324 psi | 70% | 2195 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,228 psi | 53% | 2037 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,334 psi | 62% | 2156 fps | 99.8% |
| Accurate 2700 | <<locked>> | 92% | 50,299 psi | 80% | 2257 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 31,459 psi | 50% | 2024 fps | 99.3% |
| Accurate 4350 | <<locked>> | 94% | 35,911 psi | 57% | 2169 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 49,211 psi | 78% | 2172 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,603 psi | 79% | 2188 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,449 psi | 59% | 2116 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 33,968 psi | 54% | 2037 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 49,211 psi | 78% | 2270 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,407 psi | 62% | 2129 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 38,334 psi | 61% | 2129 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,513 psi | 72% | 2290 fps | 99.4% |
| Alliant Power Pro 2000-MR | 44.5 gr | 82% | 36,056 psi | 57% | 2172 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,966 psi | 49% | 2014 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,253 psi | 73% | 2185 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,373 psi | 53% | 2057 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,099 psi | 56% | 2136 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 84% | 30,560 psi | 48% | 2060 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 47,950 psi | 76% | 2172 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,187 psi | 57% | 2113 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 30,182 psi | 48% | 2011 fps | 96.3% |
| Bofors RP7 | <<locked>> | 98% | 49,226 psi | 78% | 2283 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,568 psi | 66% | 2126 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,420 psi | 59% | 2142 fps | 99% |
| Hodgdon CFE223 | 44.4 gr | 80% | 40,988 psi | 65% | 2251 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 45,005 psi | 71% | 2215 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,484 psi | 72% | 2234 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 38,000 psi | 60% | 2142 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 37,666 psi | 60% | 2126 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 29,979 psi | 48% | 2005 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,576 psi | 53% | 2096 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,672 psi | 41% | 1230 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,361 psi | 58% | 2090 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 36,709 psi | 58% | 2133 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,446 psi | 53% | 2021 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,195 psi | 73% | 2208 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 47,021 psi | 75% | 2156 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 48,254 psi | 76% | 2270 fps | 95.5% |
| IMR 4831 | <<locked>> | 94% | 34,882 psi | 55% | 2129 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 34,127 psi | 54% | 2083 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 80% | 39,407 psi | 62% | 2129 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 44,019 psi | 70% | 2198 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 35,737 psi | 57% | 2103 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 38,290 psi | 61% | 2070 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 33,141 psi | 53% | 2028 fps | 97.5% |
| Lovex S065 | <<locked>> | 94% | 41,510 psi | 66% | 2178 fps | 95.5% |
| Lovex S070 | <<locked>> | 98% | 44,411 psi | 70% | 2244 fps | 95% |
| Norma 200 | <<locked>> | 80% | 52,025 psi | 82% | 2234 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,695 psi | 58% | 2080 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 36,869 psi | 58% | 2096 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 32,779 psi | 52% | 2051 fps | 96% |
| Norma URP | <<locked>> | 94% | 36,753 psi | 58% | 2169 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 32,300 psi | 51% | 2057 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 39,233 psi | 62% | 2126 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,261 psi | 61% | 2142 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,772 psi | 68% | 2169 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,991 psi | 41% | 1263 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,222 psi | 70% | 2198 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 44,222 psi | 70% | 2221 fps | 95.4% |
| ReloadSwiss RS 52 | 42.1 gr | 80% | 34,432 psi | 55% | 2136 fps | 95.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,572 psi | 45% | 2021 fps | 96.9% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 35,998 psi | 57% | 2182 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 39,842 psi | 63% | 2241 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 40,596 psi | 64% | 2123 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 35,099 psi | 56% | 2044 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 28,398 psi | 45% | 1962 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 98% | 49,226 psi | 78% | 2283 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 41,510 psi | 66% | 2178 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,737 psi | 57% | 2103 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 33,141 psi | 53% | 2028 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 98% | 44,411 psi | 70% | 2244 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,833 psi | 74% | 2215 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,345 psi | 85% | 2001 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 49,371 psi | 78% | 2277 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 31,604 psi | 50% | 2047 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,021 psi | 75% | 2198 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,202 psi | 59% | 2100 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,085 psi | 57% | 2093 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,493 psi | 61% | 2054 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,546 psi | 50% | 1946 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 46,659 psi | 74% | 2221 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 42,061 psi | 67% | 2195 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 37,826 psi | 60% | 2057 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 36,796 psi | 58% | 2103 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 29,486 psi | 47% | 1972 fps | 95.3% |
| Somchem S365 | <<locked>> | 88% | 27,398 psi | 43% | 1998 fps | 95.4% |
| Vihtavuori N120 | <<locked>> | 80% | 53,896 psi | 85% | 2178 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 43,656 psi | 69% | 2110 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,580 psi | 61% | 2054 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,808 psi | 54% | 2037 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,780 psi | 55% | 2044 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 28,007 psi | 44% | 1926 fps | 96.3% |
| Vihtavuori N160 | <<locked>> | 92% | 36,332 psi | 58% | 2126 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 39,378 psi | 62% | 2126 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 33,330 psi | 53% | 2034 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 94% | 37,768 psi | 60% | 2175 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 30,574 psi | 48% | 1985 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 38,043 psi | 60% | 2159 fps | 99.3% |
| Winchester 760 | <<locked>> | 98% | 45,223 psi | 72% | 2310 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,954 psi | 55% | 2090 fps | 97.3% |
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 105 powders for .338-06 A-Square loaded with the .338 | 250gr | Barnes Banded Solid. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,493 fps; across all powders the maximum-charge window runs from 1,385 fps to 2,493 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 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 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 CFE223 rank at the top here: for .338-06 A-Square with the .338 | 250gr | Barnes Banded Solid 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.