Load Specifications
Bullet Manufacturer:A-Square
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
Load data in caliber .338-06 A-Square with .338 | 250gr | A-Square LionLoad bullet and 107 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and Alliant Reloder-17.
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>> | 86% | 54,041 psi | 86% | 2316 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,956 psi | 89% | 2385 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,332 psi | 88% | 2375 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,070 psi | 86% | 2398 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,376 psi | 88% | 2379 fps | 97% |
| Accurate 4064 | <<locked>> | 94% | 55,100 psi | 87% | 2418 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,763 psi | 80% | 2444 fps | 99.3% |
| Accurate LT-30 | <<locked>> | 82% | 56,652 psi | 90% | 2303 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 57,087 psi | 90% | 2329 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,376 psi | 89% | 2448 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 53,896 psi | 85% | 2402 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,680 psi | 88% | 2408 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,869 psi | 89% | 2379 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,056 psi | 86% | 2454 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,680 psi | 88% | 2552 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,797 psi | 90% | 2464 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,041 psi | 86% | 2320 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,114 psi | 86% | 2441 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,574 psi | 79% | 2448 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,577 psi | 85% | 2526 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,041 psi | 56% | 2218 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,566 psi | 61% | 2343 fps | 96.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,637 psi | 88% | 2306 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,159 psi | 89% | 2467 fps | 99.8% |
| Bofors RP3 | <<locked>> | 94% | 53,664 psi | 85% | 2434 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,375 psi | 86% | 2408 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,288 psi | 86% | 2349 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,462 psi | 86% | 2434 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,492 psi | 90% | 2520 fps | 100% |
| Hodgdon H322 | <<locked>> | 84% | 56,536 psi | 90% | 2398 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,577 psi | 85% | 2379 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,042 psi | 87% | 2448 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,780 psi | 85% | 2487 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 98% | 55,114 psi | 87% | 2454 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 90% | 56,927 psi | 90% | 2457 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,629 psi | 72% | 2343 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,666 psi | 88% | 2484 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,071 psi | 87% | 2520 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,288 psi | 56% | 1430 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,694 psi | 87% | 2415 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 56,666 psi | 90% | 2438 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,826 psi | 90% | 2431 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,853 psi | 85% | 2372 fps | 97.6% |
| IMR 4198 | <<locked>> | 82% | 54,244 psi | 86% | 2280 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 50,763 psi | 80% | 2382 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,521 psi | 90% | 2438 fps | 97.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,138 psi | 76% | 2392 fps | 99.1% |
| IMR 4895 | <<locked>> | 92% | 55,448 psi | 88% | 2467 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 55,680 psi | 88% | 2408 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,941 psi | 89% | 2398 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,622 psi | 88% | 2425 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,260 psi | 89% | 2385 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 56,289 psi | 89% | 2425 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,230 psi | 88% | 2428 fps | 98.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,533 psi | 83% | 2411 fps | 97.7% |
| Norma 201 | <<locked>> | 90% | 55,129 psi | 87% | 2398 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,651 psi | 88% | 2402 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,869 psi | 90% | 2474 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 49,966 psi | 79% | 2431 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 92% | 53,534 psi | 85% | 2451 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,153 psi | 78% | 2428 fps | 97.8% |
| Ramshot TAC | <<locked>> | 88% | 56,028 psi | 89% | 2428 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,347 psi | 88% | 2444 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,652 psi | 90% | 2411 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,520 psi | 56% | 1463 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,158 psi | 87% | 2388 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,579 psi | 88% | 2431 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,462 psi | 86% | 2500 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,432 psi | 85% | 2526 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,183 psi | 80% | 2461 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,604 psi | 80% | 2480 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 88% | 56,318 psi | 89% | 2382 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,637 psi | 88% | 2398 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 57,058 psi | 90% | 2467 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 54,375 psi | 86% | 2408 fps | 97.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,230 psi | 88% | 2428 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,622 psi | 88% | 2425 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,289 psi | 89% | 2425 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,533 psi | 83% | 2411 fps | 97.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,926 psi | 87% | 2365 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,405 psi | 88% | 2484 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,013 psi | 87% | 2339 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,157 psi | 86% | 2405 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,810 psi | 87% | 2428 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 57,014 psi | 90% | 2343 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,695 psi | 90% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 56,014 psi | 89% | 2388 fps | 97.9% |
| Somchem S321 | <<locked>> | 86% | 56,753 psi | 90% | 2438 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,159 psi | 89% | 2346 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,780 psi | 85% | 2402 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 54,085 psi | 86% | 2425 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,585 psi | 71% | 2388 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 56,942 psi | 90% | 2313 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 57,043 psi | 90% | 2329 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,969 psi | 87% | 2365 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,115 psi | 89% | 2382 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,550 psi | 88% | 2405 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,895 psi | 84% | 2431 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 88% | 56,101 psi | 89% | 2405 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,244 psi | 86% | 2385 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,750 psi | 82% | 2438 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,463 psi | 59% | 2280 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,563 psi | 85% | 2418 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 55,695 psi | 88% | 2448 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,114 psi | 86% | 2490 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,270 psi | 50% | 2201 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,549 psi | 86% | 2434 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% | 45,121 psi | 72% | 2205 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,023 psi | 78% | 2300 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,681 psi | 60% | 2142 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,121 psi | 70% | 2267 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 45,759 psi | 73% | 2244 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 35,650 psi | 57% | 2136 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 33,591 psi | 53% | 2159 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 53,359 psi | 85% | 2264 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,780 psi | 85% | 2287 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,292 psi | 65% | 2228 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,215 psi | 56% | 2103 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,294 psi | 69% | 2234 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 43,192 psi | 68% | 2228 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,430 psi | 80% | 2405 fps | 100% |
| Alliant Power Pro 2000-MR | 48.2 gr | 80% | 37,318 psi | 59% | 2247 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,563 psi | 55% | 2119 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,836 psi | 81% | 2280 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,086 psi | 59% | 2172 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,518 psi | 52% | 2126 fps | 95% |
| Alliant Reloder-17 | 47.5 gr | 80% | 29,834 psi | 47% | 2090 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,385 psi | 47% | 2083 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,071 psi | 57% | 2287 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,330 psi | 83% | 2267 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,292 psi | 64% | 2231 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 33,866 psi | 54% | 2123 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 45,310 psi | 72% | 2274 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,411 psi | 72% | 2228 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,756 psi | 66% | 2254 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,818 psi | 73% | 2372 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 49,574 psi | 79% | 2316 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,154 psi | 79% | 2336 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 34,911 psi | 55% | 2123 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 41,582 psi | 66% | 2297 fps | 95% |
| Hodgdon H4350 | <<locked>> | 94% | 48,573 psi | 77% | 2362 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 41,597 psi | 66% | 2238 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 27,934 psi | 44% | 1995 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,608 psi | 60% | 2215 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 44,498 psi | 71% | 2362 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 41% | 1273 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,074 psi | 64% | 2198 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 40,988 psi | 65% | 2234 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,941 psi | 59% | 2129 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 84% | 44,802 psi | 71% | 2238 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 51,227 psi | 81% | 2244 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 45,020 psi | 71% | 2293 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,367 psi | 70% | 2260 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 32,634 psi | 52% | 2123 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,956 psi | 60% | 2198 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 43,294 psi | 69% | 2234 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 48,675 psi | 77% | 2306 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,001 psi | 63% | 2211 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 41,771 psi | 66% | 2175 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 36,753 psi | 58% | 2136 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 38,537 psi | 61% | 2169 fps | 95.6% |
| Lovex S070 | <<locked>> | 92% | 41,205 psi | 65% | 2238 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,698 psi | 65% | 2192 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 40,727 psi | 65% | 2198 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,492 psi | 58% | 2162 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 34,214 psi | 54% | 2159 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 35,911 psi | 57% | 2175 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 94% | 40,640 psi | 64% | 2287 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 43,207 psi | 68% | 2241 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,380 psi | 67% | 2257 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,833 psi | 74% | 2277 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,382 psi | 42% | 1306 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,573 psi | 77% | 2303 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,335 psi | 64% | 2201 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,522 psi | 61% | 2257 fps | 97.9% |
| ReloadSwiss RS 60 | 47.5 gr | 80% | 31,792 psi | 50% | 2149 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,402 psi | 53% | 2172 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 36,405 psi | 58% | 2228 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 44,527 psi | 71% | 2224 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,595 psi | 61% | 2149 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 32,068 psi | 51% | 2077 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 45,310 psi | 72% | 2274 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,537 psi | 61% | 2169 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,001 psi | 63% | 2211 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 36,753 psi | 58% | 2136 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 41,205 psi | 65% | 2238 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,372 psi | 81% | 2320 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,909 psi | 52% | 2116 fps | 96.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,648 psi | 82% | 2300 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,249 psi | 65% | 2215 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,798 psi | 63% | 2201 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,192 psi | 67% | 2152 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,853 psi | 55% | 2041 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 42,917 psi | 68% | 2208 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 46,659 psi | 74% | 2306 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,727 psi | 66% | 2156 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,060 psi | 65% | 2218 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 33,098 psi | 52% | 2083 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 25,367 psi | 40% | 1978 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 47,688 psi | 76% | 2201 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,395 psi | 67% | 2146 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,884 psi | 60% | 2136 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,609 psi | 61% | 2146 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,401 psi | 50% | 2031 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 33,620 psi | 53% | 2116 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 43,279 psi | 69% | 2231 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 36,970 psi | 59% | 2136 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,041 psi | 56% | 2162 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 31,096 psi | 49% | 2146 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,934 psi | 44% | 1965 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 42,714 psi | 68% | 2270 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 41,582 psi | 66% | 2297 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,356 psi | 47% | 2146 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,073 psi | 62% | 2205 fps | 98.9% |
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 107 powders for .338-06 A-Square loaded with the .338 | 250gr | A-Square LionLoad. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,552 fps; across all powders the maximum-charge window runs from 1,430 fps to 2,552 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, Alliant Reloder-17 rank at the top here: for .338-06 A-Square with the .338 | 250gr | A-Square LionLoad 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.