Load Specifications
Bullet Manufacturer:Woodleigh
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:1:16.5
Load data in caliber .338-06 A-Square with .338 | 250gr | Woodleigh PP SN bullet and 108 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 ReloadSwiss RS 60.
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>> | 88% | 54,534 psi | 86% | 2300 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 56,565 psi | 90% | 2369 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,114 psi | 87% | 2356 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 56,057 psi | 89% | 2408 fps | 100% |
| Accurate 2700 | <<locked>> | 98% | 56,652 psi | 90% | 2356 fps | 96.7% |
| Accurate 4064 | <<locked>> | 96% | 54,955 psi | 87% | 2395 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,775 psi | 74% | 2365 fps | 98.6% |
| Accurate LT-30 | <<locked>> | 82% | 54,143 psi | 86% | 2251 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,549 psi | 86% | 2270 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,869 psi | 90% | 2429 fps | 100% |
| ADI AR 2208 | <<locked>> | 96% | 54,215 psi | 86% | 2380 fps | 99.6% |
| ADI AR 2219 | <<locked>> | 82% | 54,911 psi | 87% | 2357 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 56,086 psi | 89% | 2385 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 55,999 psi | 89% | 2360 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,317 psi | 86% | 2431 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,130 psi | 89% | 2529 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 56,826 psi | 90% | 2439 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,563 psi | 86% | 2304 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,244 psi | 86% | 2416 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,921 psi | 76% | 2371 fps | 98.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,737 psi | 87% | 2499 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,997 psi | 54% | 2146 fps | 96.4% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,536 psi | 90% | 2292 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 56,492 psi | 90% | 2444 fps | 99.6% |
| Bofors RP3 | <<locked>> | 96% | 53,940 psi | 85% | 2415 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 56,391 psi | 89% | 2382 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,839 psi | 87% | 2331 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,752 psi | 87% | 2415 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 56,956 psi | 90% | 2500 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 88% | 56,231 psi | 89% | 2373 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,867 psi | 85% | 2360 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,303 psi | 88% | 2423 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 98% | 52,736 psi | 84% | 2435 fps | 97.1% |
| Hodgdon H4198 | <<locked>> | 82% | 56,159 psi | 89% | 2288 fps | 100% |
| Hodgdon H4895 | <<locked>> | 90% | 53,853 psi | 85% | 2393 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,989 psi | 68% | 2272 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 55,666 psi | 88% | 2461 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 52,765 psi | 84% | 2438 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,404 psi | 56% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,954 psi | 86% | 2379 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 54,969 psi | 87% | 2398 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 56,173 psi | 89% | 2395 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 96% | 52,808 psi | 84% | 2327 fps | 96.9% |
| IMR 4198 | <<locked>> | 84% | 54,969 psi | 87% | 2267 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,797 psi | 90% | 2408 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,799 psi | 65% | 2241 fps | 97.2% |
| IMR 4895 | <<locked>> | 94% | 55,651 psi | 88% | 2443 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 56,086 psi | 89% | 2386 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 56,304 psi | 89% | 2377 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 56,057 psi | 89% | 2408 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 56,826 psi | 90% | 2363 fps | 99.9% |
| Lovex S062 | <<locked>> | 96% | 56,507 psi | 90% | 2404 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,649 psi | 83% | 2360 fps | 98.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,908 psi | 79% | 2344 fps | 96.7% |
| Norma 201 | <<locked>> | 92% | 55,506 psi | 88% | 2380 fps | 100% |
| Norma 202 | <<locked>> | 92% | 55,985 psi | 89% | 2382 fps | 100% |
| Norma 203B | <<locked>> | 96% | 56,898 psi | 90% | 2449 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 47,094 psi | 75% | 2363 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 94% | 53,722 psi | 85% | 2431 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,442 psi | 75% | 2354 fps | 96.6% |
| Ramshot TAC | <<locked>> | 90% | 56,695 psi | 90% | 2408 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,753 psi | 88% | 2421 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,027 psi | 86% | 2351 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,360 psi | 56% | 1436 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,985 psi | 89% | 2374 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 56,101 psi | 89% | 2410 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,418 psi | 86% | 2476 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,664 psi | 85% | 2502 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,703 psi | 76% | 2386 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,515 psi | 77% | 2402 fps | 97.8% |
| Rottweil R 901 | <<locked>> | 90% | 56,637 psi | 90% | 2362 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,724 psi | 88% | 2374 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 53,461 psi | 85% | 2401 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 56,391 psi | 89% | 2382 fps | 96.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,649 psi | 83% | 2360 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 92% | 56,057 psi | 89% | 2408 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,507 psi | 90% | 2404 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,647 psi | 79% | 2343 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,709 psi | 88% | 2349 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,926 psi | 87% | 2366 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,362 psi | 89% | 2459 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,521 psi | 88% | 2320 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,650 psi | 87% | 2385 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,158 psi | 87% | 2406 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,375 psi | 86% | 2290 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,766 psi | 85% | 2286 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,011 psi | 84% | 2321 fps | 96.9% |
| Somchem S321 | <<locked>> | 86% | 53,896 psi | 85% | 2378 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 56,579 psi | 90% | 2326 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,201 psi | 86% | 2381 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 54,056 psi | 86% | 2400 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,554 psi | 67% | 2317 fps | 99.8% |
| Unknown powderᴾ | <<locked>> | 100% | 52,808 psi | 84% | 2411 fps | 98.6% |
| Vihtavuori N120 | <<locked>> | 82% | 55,376 psi | 88% | 2209 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 56,463 psi | 89% | 2286 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 56,768 psi | 90% | 2306 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,013 psi | 87% | 2343 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,622 psi | 88% | 2356 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,922 psi | 79% | 2303 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,315 psi | 83% | 2388 fps | 99% |
| Vihtavuori N530 | <<locked>> | 88% | 55,985 psi | 89% | 2394 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 55,201 psi | 87% | 2382 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,185 psi | 84% | 2433 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,882 psi | 55% | 2208 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,300 psi | 81% | 2350 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 56,768 psi | 90% | 2438 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,736 psi | 84% | 2435 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,869 psi | 90% | 2438 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% | 42,685 psi | 68% | 2149 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,325 psi | 73% | 2241 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,085 psi | 56% | 2083 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,016 psi | 63% | 2192 fps | 99.9% |
| Accurate 2700 | <<locked>> | 94% | 49,879 psi | 79% | 2270 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 33,214 psi | 53% | 2073 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 33,228 psi | 53% | 2133 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 51,039 psi | 81% | 2211 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,445 psi | 82% | 2234 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,247 psi | 62% | 2168 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 33,373 psi | 53% | 2042 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 51,387 psi | 81% | 2315 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,249 psi | 65% | 2178 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 40,495 psi | 64% | 2172 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,834 psi | 76% | 2343 fps | 99.7% |
| Alliant Power Pro 2000-MR | 45.5 gr | 80% | 35,317 psi | 56% | 2178 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,561 psi | 52% | 2062 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,399 psi | 77% | 2230 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,128 psi | 56% | 2112 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,708 psi | 55% | 2149 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 82% | 29,979 psi | 48% | 2068 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,024 psi | 49% | 2099 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,835 psi | 79% | 2214 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,942 psi | 60% | 2166 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 31,720 psi | 50% | 2058 fps | 97.1% |
| Bofors RP7 | <<locked>> | 96% | 48,472 psi | 77% | 2295 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,149 psi | 68% | 2170 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,407 psi | 62% | 2195 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,047 psi | 68% | 2303 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 43,584 psi | 69% | 2211 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,531 psi | 80% | 2319 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 35,128 psi | 56% | 2106 fps | 95% |
| Hodgdon H414 | <<locked>> | 94% | 45,542 psi | 72% | 2337 fps | 95.6% |
| Hodgdon H4198 | <<locked>> | 80% | 52,910 psi | 84% | 2251 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 39,537 psi | 63% | 2178 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,646 psi | 47% | 2016 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,344 psi | 53% | 2110 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 98% | 49,342 psi | 78% | 2390 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,991 psi | 41% | 1251 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,302 psi | 56% | 2087 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 35,360 psi | 56% | 2122 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 32,721 psi | 52% | 2021 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 44,469 psi | 70% | 2205 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 48,950 psi | 78% | 2196 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 44,686 psi | 71% | 2238 fps | 95% |
| IMR 4831 | <<locked>> | 94% | 33,185 psi | 53% | 2112 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 35,940 psi | 57% | 2138 fps | 97.4% |
| IMR 8208 XBR | <<locked>> | 80% | 41,249 psi | 65% | 2178 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 46,122 psi | 73% | 2247 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,637 psi | 60% | 2152 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 39,827 psi | 63% | 2118 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 34,722 psi | 55% | 2076 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 38,682 psi | 61% | 2149 fps | 95.1% |
| Lovex S070 | <<locked>> | 96% | 43,627 psi | 69% | 2252 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 38,348 psi | 61% | 2128 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 38,551 psi | 61% | 2142 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,519 psi | 55% | 2103 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 34,243 psi | 54% | 2138 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 33,910 psi | 54% | 2110 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 40,741 psi | 65% | 2262 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 40,959 psi | 65% | 2176 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,118 psi | 64% | 2195 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,367 psi | 70% | 2215 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,295 psi | 42% | 1283 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,137 psi | 73% | 2247 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,265 psi | 69% | 2227 fps | 95.6% |
| ReloadSwiss RS 52 | 44.1 gr | 80% | 36,201 psi | 57% | 2190 fps | 96.9% |
| ReloadSwiss RS 60 | 44.8 gr | 80% | 30,008 psi | 48% | 2079 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 35,665 psi | 57% | 2195 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,044 psi | 62% | 2251 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 42,206 psi | 67% | 2168 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,535 psi | 58% | 2089 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 29,921 psi | 47% | 2012 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 96% | 48,472 psi | 77% | 2295 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 38,682 psi | 61% | 2149 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,637 psi | 60% | 2152 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 34,722 psi | 55% | 2076 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 96% | 43,627 psi | 69% | 2251 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,892 psi | 77% | 2262 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,576 psi | 82% | 2326 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,169 psi | 49% | 2055 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,182 psi | 78% | 2244 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,030 psi | 62% | 2152 fps | 96.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,739 psi | 60% | 2143 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,205 psi | 64% | 2098 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,098 psi | 52% | 1990 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 45,992 psi | 73% | 2231 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 44,063 psi | 70% | 2243 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 39,450 psi | 63% | 2099 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,638 psi | 61% | 2152 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 30,980 psi | 49% | 2020 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 26,963 psi | 43% | 2003 fps | 95.7% |
| Unknown powder | <<locked>> | 90% | 37,463 psi | 59% | 2187 fps | 95.4% |
| Vihtavuori N120 | <<locked>> | 80% | 52,460 psi | 83% | 2177 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 44,628 psi | 71% | 2142 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,797 psi | 60% | 2059 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,708 psi | 57% | 2083 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,853 psi | 57% | 2080 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 26,542 psi | 42% | 1906 fps | 96% |
| Vihtavuori N160 | <<locked>> | 88% | 35,157 psi | 56% | 2121 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 43,207 psi | 68% | 2218 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 35,433 psi | 56% | 2095 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 35,418 psi | 56% | 2162 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 98% | 32,663 psi | 52% | 2161 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,008 psi | 48% | 1991 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 43,192 psi | 68% | 2259 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 45,542 psi | 72% | 2337 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,803 psi | 73% | 2293 fps | 99.5% |
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 108 powders for .338-06 A-Square loaded with the .338 | 250gr | Woodleigh PP SN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,529 fps; across all powders the maximum-charge window runs from 1,404 fps to 2,529 fps. Accurate 4350 gives the best case fill at 100 %, and 108 of the 108 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 1:16.5 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, ReloadSwiss RS 60 rank at the top here: for .338-06 A-Square with the .338 | 250gr | Woodleigh PP SN 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.