Load Specifications
Load data in caliber .338-06 A-Square with .338 | 260gr | CutEdge Maximus bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon CFE223, Alliant Power Pro 2000-MR 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.
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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 1680 | <<locked>> | 82% | 56,463 psi | 89% | 2146 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 56,275 psi | 89% | 2208 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 53,983 psi | 86% | 2254 fps | 99.1% |
| Accurate 2230 | <<locked>> | 84% | 54,679 psi | 87% | 2267 fps | 99.4% |
| Accurate 2460 | <<locked>> | 90% | 54,969 psi | 87% | 2238 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 55,622 psi | 88% | 2257 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 55,811 psi | 88% | 2283 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 51,590 psi | 82% | 2254 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 54,331 psi | 86% | 2136 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 54,766 psi | 87% | 2156 fps | 100% |
| ADI AR 2206H | <<locked>> | 96% | 55,042 psi | 87% | 2287 fps | 99.6% |
| ADI AR 2207 | <<locked>> | 84% | 55,521 psi | 88% | 2149 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 52,721 psi | 84% | 2241 fps | 99% |
| ADI AR 2219 | <<locked>> | 86% | 53,969 psi | 86% | 2234 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 54,752 psi | 87% | 2254 fps | 100% |
| Alliant AR-Comp | <<locked>> | 94% | 53,896 psi | 85% | 2238 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 56,144 psi | 89% | 2336 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 54,708 psi | 87% | 2379 fps | 99.3% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 51,242 psi | 81% | 2257 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 90% | 56,782 psi | 90% | 2221 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 55,637 psi | 88% | 2313 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 39,885 psi | 63% | 2136 fps | 96.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 45,542 psi | 72% | 2260 fps | 99% |
| Alliant Reloder-7 | <<locked>> | 84% | 56,405 psi | 89% | 2165 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 56,579 psi | 90% | 2178 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 54,810 psi | 87% | 2303 fps | 99% |
| Bofors RP3ᴾ | <<locked>> | 100% | 50,937 psi | 81% | 2267 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 54,186 psi | 86% | 2205 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 96% | 56,898 psi | 90% | 2323 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 92% | 55,129 psi | 87% | 2359 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 90% | 55,941 psi | 89% | 2257 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 56,971 psi | 90% | 2280 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 53,229 psi | 84% | 2277 fps | 98.3% |
| Hodgdon H4198 | <<locked>> | 84% | 56,246 psi | 89% | 2172 fps | 100% |
| Hodgdon H4895 | <<locked>> | 96% | 55,521 psi | 88% | 2297 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 35,998 psi | 57% | 2044 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 53,751 psi | 85% | 2323 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,968 psi | 54% | 1302 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 54,012 psi | 86% | 2260 fps | 99.7% |
| IMR 3031 | <<locked>> | 96% | 54,418 psi | 86% | 2283 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 55,550 psi | 88% | 2267 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 96% | 53,925 psi | 85% | 2215 fps | 96.1% |
| IMR 4198 | <<locked>> | 88% | 54,157 psi | 86% | 2149 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 57,029 psi | 90% | 2339 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 94% | 54,752 psi | 87% | 2254 fps | 100% |
| Lovex D073.4 | <<locked>> | 84% | 55,332 psi | 88% | 2247 fps | 100% |
| Lovex D073.5 | <<locked>> | 90% | 54,824 psi | 87% | 2247 fps | 100% |
| Lovex D073.6 | <<locked>> | 96% | 53,708 psi | 85% | 2270 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 56,289 psi | 89% | 2234 fps | 99.7% |
| Lovex S062ᴾ | <<locked>> | 100% | 54,404 psi | 86% | 2264 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 44,338 psi | 70% | 2133 fps | 95.7% |
| Norma 200 | <<locked>> | 86% | 56,478 psi | 90% | 2195 fps | 100% |
| Norma 201 | <<locked>> | 96% | 53,737 psi | 85% | 2244 fps | 99.9% |
| Norma 202 | <<locked>> | 96% | 53,954 psi | 86% | 2247 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 54,621 psi | 87% | 2303 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 39,262 psi | 62% | 2126 fps | 95.9% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 55,477 psi | 88% | 2333 fps | 99.6% |
| Ramshot TAC | <<locked>> | 94% | 55,898 psi | 89% | 2270 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 94% | 54,143 psi | 86% | 2283 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 92% | 56,579 psi | 90% | 2260 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,127 psi | 54% | 1332 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 54,839 psi | 87% | 2244 fps | 100% |
| ReloadSwiss RS 50ᴾ | <<locked>> | 100% | 54,578 psi | 87% | 2264 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 55,593 psi | 88% | 2372 fps | 99.5% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 48,762 psi | 77% | 2313 fps | 100% |
| Rottweil R 901 | <<locked>> | 94% | 54,650 psi | 87% | 2228 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 54,085 psi | 86% | 2238 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 47,587 psi | 75% | 2218 fps | 99.4% |
| Shooters World AR Plus | <<locked>> | 84% | 55,332 psi | 88% | 2247 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 44,338 psi | 70% | 2133 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 96% | 53,708 psi | 85% | 2270 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 54,404 psi | 86% | 2264 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 55,245 psi | 88% | 2224 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 55,492 psi | 88% | 1936 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 54,244 psi | 86% | 2244 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 49,719 psi | 79% | 2267 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 54,563 psi | 86% | 2198 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 96% | 57,058 psi | 90% | 2290 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 53,766 psi | 85% | 2270 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 56,855 psi | 90% | 2201 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 52,446 psi | 83% | 2159 fps | 100% |
| Somchem S321 | <<locked>> | 92% | 56,173 psi | 89% | 2290 fps | 100% |
| Somchem S335 | <<locked>> | 96% | 55,230 psi | 88% | 2198 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 56,217 psi | 89% | 2283 fps | 99.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 48,733 psi | 77% | 2221 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 34,621 psi | 55% | 2080 fps | 97.9% |
| Vihtavuori N120 | <<locked>> | 84% | 55,463 psi | 88% | 2106 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 56,753 psi | 90% | 2175 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 56,478 psi | 90% | 2188 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 56,057 psi | 89% | 2247 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 54,708 psi | 87% | 2231 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 47,050 psi | 75% | 2169 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 41,292 psi | 65% | 2126 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 94% | 55,608 psi | 88% | 2257 fps | 100% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 56,043 psi | 89% | 2270 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 40,045 psi | 63% | 2129 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 43,004 psi | 68% | 2126 fps | 98.4% |
| Winchester 748 | <<locked>> | 94% | 54,056 psi | 86% | 2293 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 98% | 56,478 psi | 90% | 2313 fps | 99.9% |
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 1680 | <<locked>> | 80% | 53,026 psi | 84% | 2113 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 36,405 psi | 58% | 1962 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 47,398 psi | 75% | 2169 fps | 98.2% |
| Accurate 2230 | <<locked>> | 80% | 47,224 psi | 75% | 2172 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 38,957 psi | 62% | 2034 fps | 99.7% |
| Accurate 2495 | <<locked>> | 80% | 28,427 psi | 45% | 1883 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 34,476 psi | 55% | 1995 fps | 99% |
| Accurate 4064 | <<locked>> | 80% | 26,992 psi | 43% | 1867 fps | 98% |
| Accurate LT-30 | <<locked>> | 80% | 45,266 psi | 72% | 2031 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 45,643 psi | 72% | 2044 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 33,286 psi | 53% | 1959 fps | 95.7% |
| ADI AR 2207 | <<locked>> | 80% | 49,110 psi | 78% | 2080 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 34,389 psi | 55% | 1965 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 44,005 psi | 70% | 2116 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,259 psi | 56% | 1975 fps | 97.6% |
| Alliant AR-Comp | <<locked>> | 80% | 33,750 psi | 53% | 1982 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 40,393 psi | 64% | 2123 fps | 98.4% |
| Alliant Power Pro 2000-MR | 41.3 gr | 86% | 36,753 psi | 58% | 2096 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 28,761 psi | 46% | 1893 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 41,597 psi | 66% | 2041 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 33,431 psi | 53% | 1982 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 98% | 37,507 psi | 59% | 2093 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 90% | 32,634 psi | 52% | 2028 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 50,053 psi | 79% | 2096 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 43,801 psi | 69% | 2031 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 36,796 psi | 58% | 2041 fps | 95.4% |
| Bofors RP3 | <<locked>> | 84% | 29,834 psi | 47% | 1932 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,666 psi | 60% | 1975 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 32,822 psi | 52% | 1982 fps | 97.6% |
| Hodgdon CFE223 | 39.3 gr | 80% | 36,419 psi | 58% | 2080 fps | 96% |
| Hodgdon H322 | <<locked>> | 80% | 40,263 psi | 64% | 2060 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 40,654 psi | 64% | 2080 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 38,159 psi | 60% | 2064 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 80% | 49,893 psi | 79% | 2100 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 33,417 psi | 53% | 1969 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 31,705 psi | 50% | 1962 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 29,704 psi | 47% | 1932 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,947 psi | 40% | 1155 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 32,474 psi | 51% | 1932 fps | 95.9% |
| IMR 3031 | <<locked>> | 80% | 32,039 psi | 51% | 1975 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 33,779 psi | 54% | 1949 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 94% | 50,676 psi | 80% | 2172 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 42,902 psi | 68% | 2014 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 32,010 psi | 51% | 1965 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 35,259 psi | 56% | 1975 fps | 97.6% |
| Lovex D073.4 | <<locked>> | 80% | 47,848 psi | 76% | 2162 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 38,928 psi | 62% | 2041 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 80% | 30,879 psi | 49% | 1939 fps | 98.1% |
| Lovex S060 | <<locked>> | 80% | 34,766 psi | 55% | 1923 fps | 96.1% |
| Lovex S062 | <<locked>> | 80% | 29,254 psi | 46% | 1873 fps | 95.8% |
| Lovex S065 | <<locked>> | 98% | 41,626 psi | 66% | 2093 fps | 95% |
| Norma 200 | <<locked>> | 80% | 46,934 psi | 74% | 2090 fps | 100% |
| Norma 201 | <<locked>> | 80% | 32,663 psi | 52% | 1929 fps | 97% |
| Norma 202 | <<locked>> | 80% | 32,663 psi | 52% | 1946 fps | 99% |
| Norma 203B | <<locked>> | 84% | 32,750 psi | 52% | 1975 fps | 95.6% |
| Norma URP | <<locked>> | 98% | 36,854 psi | 58% | 2083 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 86% | 34,882 psi | 55% | 2028 fps | 95.8% |
| Ramshot TAC | <<locked>> | 86% | 42,960 psi | 68% | 2100 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 33,939 psi | 54% | 1982 fps | 95.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 38,479 psi | 61% | 2014 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,208 psi | 40% | 1188 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,653 psi | 63% | 2044 fps | 99.4% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 47,776 psi | 76% | 2178 fps | 95.7% |
| ReloadSwiss RS 52 | 39.1 gr | 84% | 34,621 psi | 55% | 2057 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 26,890 psi | 43% | 1896 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 35,882 psi | 57% | 1969 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 80% | 30,835 psi | 49% | 1886 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 86% | 29,762 psi | 47% | 1926 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 47,848 psi | 76% | 2162 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 41,626 psi | 66% | 2093 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,879 psi | 49% | 1939 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 29,254 psi | 46% | 1873 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 42,105 psi | 67% | 2057 fps | 98.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 49,951 psi | 79% | 1880 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 44,382 psi | 70% | 2123 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 33,794 psi | 54% | 2014 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 42,496 psi | 67% | 2054 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 40,451 psi | 64% | 2070 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 31,937 psi | 51% | 1936 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,664 psi | 55% | 1909 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,065 psi | 44% | 1804 fps | 98.7% |
| Somchem S321 | <<locked>> | 80% | 37,478 psi | 59% | 2034 fps | 98.4% |
| Somchem S335 | <<locked>> | 80% | 33,997 psi | 54% | 1913 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 32,677 psi | 52% | 1946 fps | 95.2% |
| Somchem S355 | <<locked>> | 86% | 31,241 psi | 50% | 1939 fps | 95.6% |
| Somchem S365 | <<locked>> | 94% | 28,689 psi | 45% | 1949 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 49,095 psi | 78% | 2041 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 39,523 psi | 63% | 1972 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 34,693 psi | 55% | 1913 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 29,617 psi | 47% | 1890 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 30,618 psi | 49% | 1893 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 84% | 27,789 psi | 44% | 1850 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 98% | 38,740 psi | 61% | 2083 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 34,983 psi | 55% | 1969 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 29,341 psi | 47% | 1880 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 98% | 37,608 psi | 60% | 2090 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 33,040 psi | 52% | 1952 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 33,678 psi | 53% | 1998 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 30,937 psi | 49% | 1932 fps | 95.5% |
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 118 powders for .338-06 A-Square loaded with the .338 | 260gr | CutEdge Maximus. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,379 fps; across all powders the maximum-charge window runs from 1,302 fps to 2,379 fps. Accurate 2495 gives the best case fill at 100 %, and 118 of the 118 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 44–90 %, leaving at least 10 % headroom. The 260.0 gr projectile in 0.338" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Accurate 4350 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. Hodgdon CFE223, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .338-06 A-Square with the .338 | 260gr | CutEdge Maximus they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-23, Bofors RP7, Hodgdon H414 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.