Load Specifications
Bullet Manufacturer:Nosler
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:1:15.0
Load data in caliber .338-06 A-Square with .338 | 250gr | Nosler Partition Gold 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, Hodgdon CFE223 and ReloadSwiss RS 52.
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% | 56,304 psi | 89% | 2306 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 56,391 psi | 89% | 2392 fps | 99.6% |
| Accurate 2460 | <<locked>> | 86% | 54,505 psi | 86% | 2329 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 56,753 psi | 90% | 2359 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 56,028 psi | 89% | 2385 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 53,998 psi | 86% | 2313 fps | 95.9% |
| Accurate 4064 | <<locked>> | 98% | 56,246 psi | 89% | 2395 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,715 psi | 71% | 2320 fps | 98% |
| Accurate LT-30 | <<locked>> | 84% | 56,159 psi | 89% | 2257 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,608 psi | 90% | 2280 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 55,013 psi | 87% | 2388 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 98% | 55,753 psi | 88% | 2382 fps | 99.6% |
| ADI AR 2219 | <<locked>> | 84% | 56,739 psi | 90% | 2365 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 54,447 psi | 86% | 2352 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 54,230 psi | 86% | 2329 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 56,014 psi | 89% | 2438 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,215 psi | 86% | 2484 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 55,056 psi | 87% | 2402 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 56,115 psi | 89% | 2310 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 56,014 psi | 89% | 2425 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,136 psi | 72% | 2329 fps | 98.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 51,692 psi | 82% | 2454 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,100 psi | 87% | 2260 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 54,549 psi | 86% | 2405 fps | 99.4% |
| Bofors RP3 | <<locked>> | 98% | 55,158 psi | 87% | 2415 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 52,968 psi | 84% | 2339 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 90% | 56,753 psi | 90% | 2339 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 56,550 psi | 90% | 2421 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 54,607 psi | 87% | 2457 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 86% | 55,303 psi | 88% | 2349 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 56,057 psi | 89% | 2372 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 57,000 psi | 90% | 2428 fps | 99.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 48,660 psi | 77% | 2369 fps | 96% |
| Hodgdon H4895 | <<locked>> | 92% | 55,463 psi | 88% | 2398 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,133 psi | 65% | 2228 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 53,853 psi | 85% | 2425 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,824 psi | 55% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 56,985 psi | 90% | 2402 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 54,650 psi | 87% | 2382 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,303 psi | 88% | 2369 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,231 psi | 89% | 2352 fps | 97.2% |
| IMR 4198 | <<locked>> | 86% | 56,434 psi | 89% | 2270 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 55,013 psi | 87% | 2369 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,989 psi | 68% | 2277 fps | 97.7% |
| IMR 4895 | <<locked>> | 94% | 53,679 psi | 85% | 2405 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 90% | 54,447 psi | 86% | 2352 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 54,375 psi | 86% | 2339 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 53,795 psi | 85% | 2369 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,303 psi | 88% | 2329 fps | 99.8% |
| Lovex S062 | <<locked>> | 96% | 54,607 psi | 87% | 2365 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,401 psi | 80% | 2320 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,848 psi | 76% | 2300 fps | 96% |
| Norma 200 | <<locked>> | 82% | 55,941 psi | 89% | 2283 fps | 100% |
| Norma 201 | <<locked>> | 92% | 53,867 psi | 85% | 2346 fps | 100% |
| Norma 202 | <<locked>> | 92% | 53,969 psi | 86% | 2346 fps | 100% |
| Norma 203B | <<locked>> | 96% | 55,100 psi | 87% | 2411 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 45,107 psi | 71% | 2320 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 96% | 55,361 psi | 88% | 2434 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,454 psi | 70% | 2310 fps | 95.8% |
| Ramshot TAC | <<locked>> | 90% | 54,824 psi | 87% | 2365 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 53,679 psi | 85% | 2379 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 88% | 55,753 psi | 88% | 2356 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,056 psi | 56% | 1421 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 54,259 psi | 86% | 2339 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 53,940 psi | 85% | 2365 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 55,782 psi | 88% | 2477 fps | 99.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 55,201 psi | 87% | 2503 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,672 psi | 71% | 2339 fps | 97.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 45,977 psi | 73% | 2356 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 90% | 54,795 psi | 87% | 2326 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 54,099 psi | 86% | 2339 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 54,998 psi | 87% | 2405 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 52,968 psi | 84% | 2339 fps | 96.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,401 psi | 80% | 2320 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 92% | 53,795 psi | 85% | 2369 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 54,607 psi | 87% | 2365 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,848 psi | 76% | 2300 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 54,056 psi | 86% | 2313 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,695 psi | 90% | 2041 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 56,826 psi | 90% | 2375 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 56,797 psi | 90% | 2457 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 53,722 psi | 85% | 2287 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 56,623 psi | 90% | 2392 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 56,710 psi | 90% | 2408 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 55,985 psi | 89% | 2293 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 55,216 psi | 88% | 2287 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 50,531 psi | 80% | 2277 fps | 96.2% |
| Somchem S321 | <<locked>> | 88% | 55,622 psi | 88% | 2385 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 55,013 psi | 87% | 2293 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 55,811 psi | 88% | 2382 fps | 99.8% |
| Somchem S355ᴾ | <<locked>> | 100% | 55,535 psi | 88% | 2402 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,972 psi | 63% | 2274 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 88% | 56,043 psi | 89% | 2264 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 55,898 psi | 89% | 2280 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 56,579 psi | 90% | 2349 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 54,476 psi | 86% | 2326 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 53,838 psi | 85% | 2349 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,456 psi | 75% | 2316 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 90% | 55,013 psi | 87% | 2352 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 55,840 psi | 89% | 2365 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,267 psi | 73% | 2320 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,486 psi | 77% | 2306 fps | 99.6% |
| Winchester 748 | <<locked>> | 90% | 53,809 psi | 85% | 2388 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 48,660 psi | 77% | 2369 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 94% | 56,579 psi | 90% | 2418 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% | 41,321 psi | 65% | 2116 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,663 psi | 83% | 2343 fps | 99.3% |
| Accurate 2460 | <<locked>> | 80% | 44,831 psi | 71% | 2208 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,779 psi | 54% | 2051 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,059 psi | 63% | 2172 fps | 99.8% |
| Accurate 2700 | <<locked>> | 92% | 50,865 psi | 81% | 2270 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 31,952 psi | 51% | 2037 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 34,026 psi | 54% | 2139 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 49,763 psi | 79% | 2182 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,154 psi | 79% | 2201 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,869 psi | 60% | 2129 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 34,403 psi | 55% | 2051 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 49,763 psi | 79% | 2280 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,871 psi | 63% | 2142 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 38,957 psi | 62% | 2139 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,050 psi | 73% | 2303 fps | 99.5% |
| Alliant Power Pro 2000-MR | 45 gr | 82% | 36,405 psi | 58% | 2185 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,212 psi | 49% | 2021 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,905 psi | 74% | 2198 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,837 psi | 54% | 2073 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,621 psi | 56% | 2152 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 84% | 30,864 psi | 49% | 2077 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,646 psi | 77% | 2185 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,796 psi | 58% | 2129 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 30,647 psi | 49% | 2024 fps | 96.5% |
| Bofors RP7 | <<locked>> | 98% | 49,864 psi | 79% | 2297 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,032 psi | 67% | 2139 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,840 psi | 60% | 2156 fps | 99.1% |
| Hodgdon CFE223 | 44.9 gr | 80% | 41,452 psi | 66% | 2260 fps | 97.9% |
| Hodgdon H322 | <<locked>> | 80% | 45,571 psi | 72% | 2228 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,919 psi | 73% | 2244 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 36,114 psi | 57% | 2113 fps | 95% |
| Hodgdon H414 | <<locked>> | 98% | 45,498 psi | 72% | 2320 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 38,159 psi | 60% | 2139 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,501 psi | 48% | 2021 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,200 psi | 54% | 2113 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,817 psi | 41% | 1237 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,825 psi | 58% | 2103 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 37,057 psi | 59% | 2142 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,895 psi | 54% | 2034 fps | 95.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,818 psi | 74% | 2224 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 47,659 psi | 76% | 2165 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 45,759 psi | 73% | 2238 fps | 95% |
| IMR 4831 | <<locked>> | 94% | 35,462 psi | 56% | 2146 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 34,606 psi | 55% | 2100 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 80% | 39,871 psi | 63% | 2142 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 44,454 psi | 70% | 2211 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 36,216 psi | 57% | 2116 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 38,740 psi | 61% | 2083 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 33,576 psi | 53% | 2041 fps | 97.7% |
| Lovex S065 | <<locked>> | 92% | 39,668 psi | 63% | 2152 fps | 95.1% |
| Lovex S070 | <<locked>> | 98% | 44,715 psi | 71% | 2254 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 52,663 psi | 83% | 2247 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,173 psi | 59% | 2093 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 37,086 psi | 59% | 2106 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 33,243 psi | 53% | 2064 fps | 96.3% |
| Norma URP | <<locked>> | 92% | 35,157 psi | 56% | 2142 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 32,663 psi | 52% | 2070 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 98% | 41,669 psi | 66% | 2260 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 39,610 psi | 63% | 2139 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,653 psi | 61% | 2156 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,178 psi | 68% | 2182 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,121 psi | 41% | 1270 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,715 psi | 71% | 2211 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 44,570 psi | 71% | 2231 fps | 95.6% |
| ReloadSwiss RS 52 | 42.6 gr | 80% | 34,882 psi | 55% | 2149 fps | 96.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,877 psi | 46% | 2034 fps | 97.1% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 36,506 psi | 58% | 2198 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 40,321 psi | 64% | 2257 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 41,104 psi | 65% | 2136 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 35,360 psi | 56% | 2054 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 28,819 psi | 46% | 1975 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 98% | 49,864 psi | 79% | 2297 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 39,668 psi | 63% | 2152 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,216 psi | 57% | 2116 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 33,576 psi | 53% | 2041 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 98% | 44,715 psi | 71% | 2254 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,253 psi | 75% | 2224 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,722 psi | 85% | 2008 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 49,864 psi | 79% | 2290 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 31,952 psi | 51% | 2060 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,616 psi | 75% | 2211 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,579 psi | 60% | 2113 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,506 psi | 58% | 2106 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,957 psi | 62% | 2064 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,966 psi | 51% | 1955 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,326 psi | 75% | 2234 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 42,772 psi | 68% | 2208 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 38,334 psi | 61% | 2067 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,434 psi | 59% | 2116 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 29,921 psi | 47% | 1985 fps | 95.5% |
| Somchem S365 | <<locked>> | 88% | 27,673 psi | 44% | 2008 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 44,208 psi | 70% | 2123 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,073 psi | 62% | 2064 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,374 psi | 54% | 2051 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,244 psi | 56% | 2054 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 28,398 psi | 45% | 1939 fps | 96.5% |
| Vihtavuori N160 | <<locked>> | 92% | 36,854 psi | 58% | 2142 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 39,856 psi | 63% | 2139 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 33,721 psi | 53% | 2044 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 35,868 psi | 57% | 2146 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,009 psi | 49% | 1998 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 38,551 psi | 61% | 2172 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 45,774 psi | 73% | 2323 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,607 psi | 56% | 2106 fps | 97.6% |
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 105 powders for .338-06 A-Square loaded with the .338 | 250gr | Nosler Partition Gold. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,503 fps; across all powders the maximum-charge window runs from 1,388 fps to 2,503 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 1:15.0 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, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for .338-06 A-Square with the .338 | 250gr | Nosler Partition Gold 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.