Load Specifications
Load data in caliber .338-06 A-Square with .338 | 250gr | RWS Speed Tip Professional bullet and 99 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.
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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>> | 92% | 54,578 psi | 87% | 2251 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 55,317 psi | 88% | 2329 fps | 99.1% |
| Accurate 2230 | <<locked>> | 84% | 56,231 psi | 89% | 2343 fps | 99.4% |
| Accurate 2460 | <<locked>> | 90% | 56,884 psi | 90% | 2316 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 54,273 psi | 86% | 2300 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 54,041 psi | 86% | 2323 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 53,650 psi | 85% | 2333 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 39,291 psi | 62% | 2198 fps | 96% |
| Accurate LT-30 | <<locked>> | 86% | 55,593 psi | 88% | 2208 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 56,028 psi | 89% | 2228 fps | 100% |
| ADI AR 2206H | <<locked>> | 96% | 56,985 psi | 90% | 2369 fps | 99.7% |
| ADI AR 2207 | <<locked>> | 84% | 57,043 psi | 90% | 2221 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 54,389 psi | 86% | 2320 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 86% | 55,477 psi | 88% | 2313 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 56,289 psi | 89% | 2329 fps | 100% |
| Alliant AR-Comp | <<locked>> | 94% | 55,506 psi | 88% | 2310 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 54,317 psi | 86% | 2375 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 56,304 psi | 89% | 2461 fps | 99.3% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 52,997 psi | 84% | 2336 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 88% | 54,940 psi | 87% | 2260 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 54,027 psi | 86% | 2356 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 41,060 psi | 65% | 2208 fps | 96.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 46,731 psi | 74% | 2336 fps | 99.1% |
| Alliant Reloder-7 | <<locked>> | 82% | 54,433 psi | 86% | 2201 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 54,085 psi | 86% | 2211 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 56,536 psi | 90% | 2382 fps | 99.1% |
| Bofors RP3ᴾ | <<locked>> | 100% | 53,200 psi | 84% | 2349 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 55,477 psi | 88% | 2280 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 94% | 54,723 psi | 87% | 2359 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 92% | 56,724 psi | 90% | 2438 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 88% | 53,954 psi | 86% | 2297 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 54,737 psi | 87% | 2316 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 55,245 psi | 88% | 2359 fps | 98.4% |
| Hodgdon H4198 | <<locked>> | 82% | 54,346 psi | 86% | 2211 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 53,766 psi | 85% | 2336 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 37,275 psi | 59% | 2116 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 55,550 psi | 88% | 2405 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,156 psi | 54% | 1342 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 55,405 psi | 88% | 2336 fps | 99.8% |
| IMR 3031 | <<locked>> | 96% | 56,246 psi | 89% | 2362 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 53,983 psi | 86% | 2306 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 96% | 55,143 psi | 87% | 2287 fps | 96.2% |
| IMR 4198 | <<locked>> | 88% | 55,405 psi | 88% | 2221 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 55,317 psi | 88% | 2382 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 94% | 56,289 psi | 89% | 2329 fps | 100% |
| Lovex D073.4 | <<locked>> | 84% | 57,087 psi | 90% | 2326 fps | 100% |
| Lovex D073.5 | <<locked>> | 90% | 56,579 psi | 90% | 2323 fps | 100% |
| Lovex D073.6 | <<locked>> | 96% | 55,303 psi | 88% | 2346 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 54,157 psi | 86% | 2267 fps | 99.5% |
| Lovex S062ᴾ | <<locked>> | 100% | 56,376 psi | 89% | 2343 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 45,759 psi | 73% | 2208 fps | 95.8% |
| Norma 200 | <<locked>> | 84% | 54,998 psi | 87% | 2238 fps | 100% |
| Norma 201 | <<locked>> | 96% | 55,579 psi | 88% | 2323 fps | 100% |
| Norma 202 | <<locked>> | 96% | 55,651 psi | 88% | 2326 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 56,347 psi | 89% | 2382 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 40,553 psi | 64% | 2201 fps | 96% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 57,058 psi | 90% | 2408 fps | 99.6% |
| Ramshot TAC | <<locked>> | 92% | 53,766 psi | 85% | 2303 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 94% | 56,072 psi | 89% | 2365 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 90% | 54,636 psi | 87% | 2297 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,374 psi | 54% | 1375 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 56,550 psi | 90% | 2323 fps | 100% |
| ReloadSwiss RS 50ᴾ | <<locked>> | 100% | 55,927 psi | 89% | 2339 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 53,403 psi | 85% | 2405 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 49,937 psi | 79% | 2388 fps | 100% |
| Rottweil R 901 | <<locked>> | 94% | 56,579 psi | 90% | 2306 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 55,912 psi | 89% | 2316 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 49,124 psi | 78% | 2293 fps | 99.4% |
| Shooters World AR Plus | <<locked>> | 84% | 57,087 psi | 90% | 2326 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 45,759 psi | 73% | 2208 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 96% | 55,303 psi | 88% | 2346 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 56,376 psi | 89% | 2343 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 56,855 psi | 90% | 2300 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 56,521 psi | 90% | 2001 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 55,651 psi | 88% | 2320 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 51,445 psi | 82% | 2349 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 56,028 psi | 89% | 2274 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 54,752 psi | 87% | 2323 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 55,056 psi | 87% | 2343 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 54,839 psi | 87% | 2238 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 53,940 psi | 85% | 2234 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 54,244 psi | 86% | 2326 fps | 100% |
| Somchem S335 | <<locked>> | 96% | 56,927 psi | 90% | 2274 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 54,273 psi | 86% | 2323 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 50,212 psi | 80% | 2293 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,100 psi | 57% | 2159 fps | 98.1% |
| Vihtavuori N120 | <<locked>> | 84% | 56,927 psi | 90% | 2178 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 55,056 psi | 87% | 2218 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 54,534 psi | 86% | 2228 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 54,346 psi | 86% | 2290 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 56,173 psi | 89% | 2306 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 48,414 psi | 77% | 2241 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 42,757 psi | 68% | 2201 fps | 96.4% |
| Vihtavuori N530 | <<locked>> | 92% | 53,780 psi | 85% | 2293 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 98% | 54,244 psi | 86% | 2310 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 41,742 psi | 66% | 2208 fps | 96.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 44,266 psi | 70% | 2198 fps | 98.5% |
| Winchester 748 | <<locked>> | 94% | 55,753 psi | 88% | 2372 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 54,592 psi | 87% | 2352 fps | 99.8% |
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% | 37,811 psi | 60% | 2031 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 48,602 psi | 77% | 2241 fps | 98.3% |
| Accurate 2230 | <<locked>> | 80% | 48,994 psi | 78% | 2254 fps | 98.6% |
| Accurate 2460 | <<locked>> | 80% | 40,669 psi | 64% | 2110 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 30,168 psi | 48% | 1955 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 36,085 psi | 57% | 2070 fps | 99.1% |
| Accurate 4064 | <<locked>> | 80% | 28,601 psi | 45% | 1939 fps | 98.3% |
| Accurate 4350 | <<locked>> | 98% | 36,811 psi | 58% | 2156 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 46,514 psi | 74% | 2100 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 46,847 psi | 74% | 2116 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 34,780 psi | 55% | 2034 fps | 95.9% |
| ADI AR 2207 | <<locked>> | 80% | 50,459 psi | 80% | 2152 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 35,679 psi | 57% | 2037 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 45,455 psi | 72% | 2188 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,738 psi | 58% | 2047 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 80% | 34,983 psi | 55% | 2051 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,105 psi | 67% | 2201 fps | 98.5% |
| Alliant Power Pro 2000-MR | 43 gr | 86% | 37,942 psi | 60% | 2169 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,240 psi | 48% | 1969 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 42,975 psi | 68% | 2110 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 34,853 psi | 55% | 2057 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 98% | 38,754 psi | 61% | 2165 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 33,953 psi | 54% | 2103 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 51,271 psi | 81% | 2165 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 44,875 psi | 71% | 2100 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 38,058 psi | 60% | 2113 fps | 95.6% |
| Bofors RP3 | <<locked>> | 82% | 29,254 psi | 46% | 1962 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,914 psi | 62% | 2047 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,200 psi | 54% | 2054 fps | 97.8% |
| Hodgdon CFE223 | 40.9 gr | 80% | 37,623 psi | 60% | 2152 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 80% | 41,539 psi | 66% | 2133 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 41,974 psi | 67% | 2152 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 39,856 psi | 63% | 2139 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 51,169 psi | 81% | 2172 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 34,940 psi | 55% | 2044 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 33,127 psi | 53% | 2037 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 30,980 psi | 49% | 2005 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,512 psi | 40% | 1201 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,634 psi | 53% | 2005 fps | 96.1% |
| IMR 3031 | <<locked>> | 80% | 33,489 psi | 53% | 2051 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 35,157 psi | 56% | 2021 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 94% | 52,040 psi | 82% | 2247 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 44,164 psi | 70% | 2087 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 33,504 psi | 53% | 2041 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 36,738 psi | 58% | 2047 fps | 97.8% |
| Lovex D073.4 | <<locked>> | 80% | 49,777 psi | 79% | 2241 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 40,553 psi | 64% | 2113 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 32,561 psi | 52% | 2018 fps | 98.4% |
| Lovex S060 | <<locked>> | 80% | 35,781 psi | 57% | 1988 fps | 96.2% |
| Lovex S062 | <<locked>> | 80% | 30,487 psi | 48% | 1942 fps | 96% |
| Lovex S065 | <<locked>> | 98% | 43,120 psi | 68% | 2169 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 48,428 psi | 77% | 2162 fps | 100% |
| Norma 201 | <<locked>> | 80% | 33,968 psi | 54% | 1998 fps | 97.2% |
| Norma 202 | <<locked>> | 80% | 33,837 psi | 54% | 2011 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 32,155 psi | 51% | 2008 fps | 95.1% |
| Norma URP | <<locked>> | 98% | 38,145 psi | 60% | 2159 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 84% | 33,852 psi | 54% | 2057 fps | 95.2% |
| Ramshot TAC | <<locked>> | 86% | 44,179 psi | 70% | 2172 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,215 psi | 56% | 2054 fps | 96% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,769 psi | 63% | 2083 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,556 psi | 41% | 1227 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,133 psi | 65% | 2119 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 46,224 psi | 73% | 2211 fps | 95.1% |
| ReloadSwiss RS 52 | 40.7 gr | 84% | 35,897 psi | 57% | 2133 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 28,224 psi | 45% | 1975 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 37,724 psi | 60% | 2044 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 32,401 psi | 51% | 1962 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 86% | 31,285 psi | 50% | 2001 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 80% | 49,777 psi | 79% | 2241 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 43,120 psi | 68% | 2169 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,561 psi | 52% | 2018 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 30,487 psi | 48% | 1942 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,424 psi | 69% | 2126 fps | 98.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 50,836 psi | 81% | 1942 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 45,730 psi | 72% | 2195 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 33,083 psi | 52% | 2044 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 43,714 psi | 69% | 2123 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 41,858 psi | 66% | 2146 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,272 psi | 53% | 2008 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,853 psi | 57% | 1975 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,182 psi | 46% | 1870 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 38,870 psi | 62% | 2110 fps | 98.5% |
| Somchem S335 | <<locked>> | 80% | 35,157 psi | 56% | 1982 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 33,910 psi | 54% | 2014 fps | 95.4% |
| Somchem S355 | <<locked>> | 84% | 30,792 psi | 49% | 1972 fps | 95.1% |
| Somchem S365 | <<locked>> | 92% | 28,384 psi | 45% | 1985 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 50,372 psi | 80% | 2110 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 40,756 psi | 65% | 2041 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,853 psi | 57% | 1982 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 30,922 psi | 49% | 1959 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 32,111 psi | 51% | 1965 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 27,441 psi | 43% | 1883 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 96% | 37,927 psi | 60% | 2119 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 36,477 psi | 58% | 2044 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 80% | 30,748 psi | 49% | 1952 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 98% | 39,131 psi | 62% | 2165 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 34,301 psi | 54% | 2024 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 35,027 psi | 56% | 2070 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,227 psi | 51% | 2005 fps | 95.7% |
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 99 powders for .338-06 A-Square loaded with the .338 | 250gr | RWS Speed Tip Professional. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,461 fps; across all powders the maximum-charge window runs from 1,342 fps to 2,461 fps. Accurate 4064 gives the best case fill at 100 %, and 99 of the 99 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 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, Accurate 4350, ADI AR 2208 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 | RWS Speed Tip Professional 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.