Load Specifications
Load data in caliber .416 Taylor Mag. with .416 | 400gr | Woodleigh HS bullet and 94 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 1200-R and Alliant Power Pro 2000-MR.
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>> | 84% | 57,638 psi | 90% | 2090 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 56,550 psi | 89% | 2146 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 54,679 psi | 86% | 2185 fps | 98.7% |
| Accurate 2230 | <<locked>> | 86% | 55,172 psi | 86% | 2195 fps | 99% |
| Accurate 2460 | <<locked>> | 92% | 55,317 psi | 87% | 2172 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2156 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 56,275 psi | 88% | 2218 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 48,385 psi | 76% | 2149 fps | 100% |
| Accurate LT-30 | <<locked>> | 88% | 55,042 psi | 86% | 2073 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 55,550 psi | 87% | 2093 fps | 100% |
| ADI AR 2206H | <<locked>> | 98% | 55,492 psi | 87% | 2218 fps | 99.3% |
| ADI AR 2207 | <<locked>> | 86% | 56,014 psi | 88% | 2090 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 2133 fps | 98.1% |
| ADI AR 2219 | <<locked>> | 88% | 54,317 psi | 85% | 2172 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 55,158 psi | 86% | 2185 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 98% | 57,072 psi | 89% | 2201 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 56,637 psi | 89% | 2267 fps | 99.8% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 55,100 psi | 86% | 2300 fps | 98.7% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 48,051 psi | 75% | 2146 fps | 99.2% |
| Alliant Reloder-10x | <<locked>> | 92% | 57,014 psi | 89% | 2156 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 2201 fps | 98.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 42,772 psi | 67% | 2136 fps | 97.8% |
| Alliant Reloder-7 | <<locked>> | 86% | 57,421 psi | 90% | 2106 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 57,188 psi | 90% | 2116 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 55,027 psi | 86% | 2228 fps | 98.5% |
| Bofors RP3ᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2156 fps | 99.2% |
| Hodgdon Benchmark | <<locked>> | 94% | 54,766 psi | 86% | 2139 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 98% | 56,855 psi | 89% | 2251 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 94% | 55,245 psi | 87% | 2283 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 92% | 56,275 psi | 88% | 2192 fps | 100% |
| Hodgdon H335 | <<locked>> | 92% | 57,508 psi | 90% | 2218 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 50,067 psi | 78% | 2162 fps | 97.1% |
| Hodgdon H4198 | <<locked>> | 86% | 57,159 psi | 90% | 2110 fps | 100% |
| Hodgdon H4895 | <<locked>> | 98% | 55,941 psi | 88% | 2224 fps | 99.7% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 53,751 psi | 84% | 2247 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,808 psi | 53% | 1250 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 57,667 psi | 90% | 2228 fps | 99.7% |
| IMR 3031ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 2247 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 2156 fps | 98.7% |
| IMR 4166 Enduronᴾ | <<locked>> | 100% | 57,682 psi | 90% | 2178 fps | 95.9% |
| IMR 4198 | <<locked>> | 90% | 54,694 psi | 86% | 2087 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 57,174 psi | 90% | 2051 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 53,621 psi | 84% | 2228 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 96% | 55,158 psi | 86% | 2185 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 86% | 56,101 psi | 88% | 2182 fps | 100% |
| Lovex D073.5 | <<locked>> | 92% | 55,347 psi | 87% | 2178 fps | 100% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2238 fps | 100% |
| Lovex S053 | <<locked>> | 82% | 56,043 psi | 88% | 2005 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 56,623 psi | 89% | 2162 fps | 99.4% |
| Lovex S062ᴾ | <<locked>> | 100% | 51,271 psi | 80% | 2156 fps | 99.6% |
| Norma 200 | <<locked>> | 88% | 57,334 psi | 90% | 2136 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 57,624 psi | 90% | 2211 fps | 99.9% |
| Norma 202ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 2218 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 51,343 psi | 80% | 2192 fps | 99% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 51,982 psi | 81% | 2211 fps | 98.8% |
| Ramshot TAC | <<locked>> | 96% | 56,188 psi | 88% | 2198 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 96% | 54,447 psi | 85% | 2211 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 94% | 57,159 psi | 90% | 2192 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,953 psi | 53% | 1280 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 57,421 psi | 90% | 2083 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 55,506 psi | 87% | 2182 fps | 100% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 55,448 psi | 87% | 2293 fps | 99.1% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 45,803 psi | 72% | 2195 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 96% | 55,535 psi | 87% | 2165 fps | 100% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 2169 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 44,469 psi | 70% | 2106 fps | 98.6% |
| Shooters World AR Plus | <<locked>> | 86% | 56,101 psi | 88% | 2182 fps | 100% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2238 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 51,271 psi | 80% | 2156 fps | 99.6% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 56,217 psi | 88% | 2159 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 56,231 psi | 88% | 1883 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 54,752 psi | 86% | 2182 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 46,891 psi | 73% | 2156 fps | 98.2% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 54,984 psi | 86% | 2136 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 98% | 57,348 psi | 90% | 2215 fps | 98% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 57,421 psi | 90% | 2234 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 57,479 psi | 90% | 2136 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 49,414 psi | 77% | 2060 fps | 100% |
| Somchem S321 | <<locked>> | 94% | 56,434 psi | 88% | 2218 fps | 99.9% |
| Somchem S335 | <<locked>> | 98% | 55,825 psi | 87% | 2136 fps | 100% |
| Somchem S341 | <<locked>> | 98% | 56,420 psi | 88% | 2211 fps | 99.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 45,788 psi | 72% | 2110 fps | 98.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 32,808 psi | 51% | 1969 fps | 96.3% |
| Vihtavuori N120 | <<locked>> | 86% | 55,985 psi | 88% | 2047 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 57,232 psi | 90% | 2113 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 56,797 psi | 89% | 2123 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 52,402 psi | 82% | 2146 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 2165 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 44,121 psi | 69% | 2064 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 96% | 56,028 psi | 88% | 2188 fps | 99.9% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 2165 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 40,669 psi | 64% | 2011 fps | 97.1% |
| Winchester 748 | <<locked>> | 98% | 57,696 psi | 90% | 2260 fps | 100% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2241 fps | 99.7% |
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% | 50,647 psi | 79% | 2018 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 34,751 psi | 54% | 1873 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 44,976 psi | 70% | 2060 fps | 97.2% |
| Accurate 2230 | <<locked>> | 80% | 44,831 psi | 70% | 2067 fps | 97.5% |
| Accurate 2460 | <<locked>> | 80% | 37,318 psi | 58% | 1942 fps | 99.2% |
| Accurate 2495 | <<locked>> | 80% | 27,195 psi | 43% | 1798 fps | 99.4% |
| Accurate 2520 | <<locked>> | 80% | 32,735 psi | 51% | 1900 fps | 98.1% |
| Accurate 4064 | <<locked>> | 80% | 25,817 psi | 40% | 1778 fps | 97% |
| Accurate LT-30 | <<locked>> | 80% | 43,308 psi | 68% | 1939 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 43,685 psi | 68% | 1949 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 82% | 33,866 psi | 53% | 1903 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 46,775 psi | 73% | 1991 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 37,115 psi | 58% | 1946 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 41,713 psi | 65% | 2018 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 33,779 psi | 53% | 1880 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 80% | 31,995 psi | 50% | 1893 fps | 100% |
| Alliant Power Pro 1200-R | 49.8 gr | 80% | 38,392 psi | 60% | 2018 fps | 97.3% |
| Alliant Power Pro 2000-MR | 59.7 gr | 90% | 39,769 psi | 62% | 2073 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 31,067 psi | 49% | 1877 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 39,827 psi | 62% | 1952 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 36,201 psi | 57% | 1969 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 94% | 35,433 psi | 56% | 2008 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 47,993 psi | 75% | 2005 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 41,800 psi | 66% | 1939 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 39,755 psi | 62% | 2021 fps | 95.5% |
| Bofors RP3 | <<locked>> | 86% | 30,110 psi | 47% | 1877 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,071 psi | 57% | 1883 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,053 psi | 49% | 1883 fps | 96.4% |
| Hodgdon CFE223 | 55.6 gr | 82% | 36,898 psi | 58% | 2014 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 38,116 psi | 60% | 1965 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 38,580 psi | 60% | 1982 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 94% | 41,220 psi | 65% | 2041 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 80% | 47,732 psi | 75% | 2005 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 32,039 psi | 50% | 1873 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 32,372 psi | 51% | 1919 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,063 psi | 39% | 1112 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 33,170 psi | 52% | 1880 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 30,516 psi | 48% | 1883 fps | 99.4% |
| IMR 4064 | <<locked>> | 88% | 36,593 psi | 57% | 1932 fps | 95.4% |
| IMR 4166 Enduron | <<locked>> | 98% | 54,418 psi | 85% | 2142 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 40,944 psi | 64% | 1926 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 53,998 psi | 85% | 2018 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 34,606 psi | 54% | 1949 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 33,779 psi | 53% | 1880 fps | 96.5% |
| Lovex D073.4 | <<locked>> | 80% | 45,585 psi | 71% | 2060 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 36,970 psi | 58% | 1942 fps | 98.3% |
| Lovex D073.6 | <<locked>> | 80% | 29,428 psi | 46% | 1847 fps | 97.1% |
| Lovex S053 | <<locked>> | 80% | 52,750 psi | 83% | 1972 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 35,302 psi | 55% | 1867 fps | 95.5% |
| Lovex S062 | <<locked>> | 82% | 29,704 psi | 47% | 1821 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 44,904 psi | 70% | 2001 fps | 100% |
| Norma 201 | <<locked>> | 80% | 31,285 psi | 49% | 1834 fps | 95.8% |
| Norma 202 | <<locked>> | 80% | 31,067 psi | 49% | 1850 fps | 98.2% |
| Norma 203B | <<locked>> | 88% | 35,462 psi | 56% | 1959 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 88% | 35,215 psi | 55% | 1962 fps | 95% |
| Ramshot TAC | <<locked>> | 90% | 46,383 psi | 73% | 2073 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 34,461 psi | 54% | 1926 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 36,666 psi | 57% | 1913 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,092 psi | 39% | 1138 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 54,114 psi | 85% | 2051 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,000 psi | 60% | 1952 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 37,231 psi | 58% | 2034 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 29,341 psi | 46% | 1886 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 34,809 psi | 55% | 1880 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 80% | 29,805 psi | 47% | 1801 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 90% | 32,155 psi | 50% | 1909 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 45,585 psi | 71% | 2060 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 29,428 psi | 46% | 1847 fps | 97.1% |
| Shooters World Precision | <<locked>> | 82% | 29,704 psi | 47% | 1821 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 40,030 psi | 63% | 1955 fps | 97.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 48,356 psi | 76% | 1804 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 42,148 psi | 66% | 2024 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 36,419 psi | 57% | 1991 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 40,466 psi | 63% | 1959 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 43,801 psi | 69% | 2047 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 34,650 psi | 54% | 1919 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,315 psi | 52% | 1821 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,963 psi | 42% | 1719 fps | 97.8% |
| Somchem S321 | <<locked>> | 80% | 35,650 psi | 56% | 1936 fps | 97.4% |
| Somchem S335 | <<locked>> | 80% | 32,576 psi | 51% | 1824 fps | 99% |
| Somchem S341 | <<locked>> | 84% | 35,592 psi | 56% | 1929 fps | 95.4% |
| Somchem S355 | <<locked>> | 88% | 31,676 psi | 50% | 1883 fps | 95% |
| Somchem S365 | <<locked>> | 98% | 30,937 psi | 48% | 1929 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 46,818 psi | 73% | 1952 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 37,869 psi | 59% | 1886 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,156 psi | 52% | 1827 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 28,166 psi | 44% | 1801 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 80% | 29,254 psi | 46% | 1801 fps | 98% |
| Vihtavuori N150 | <<locked>> | 86% | 28,282 psi | 44% | 1798 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 33,417 psi | 52% | 1873 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 80% | 28,108 psi | 44% | 1795 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 35,766 psi | 56% | 1932 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 32,082 psi | 50% | 1900 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 84% | 33,605 psi | 53% | 1919 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 116 powders for .416 Taylor Mag. loaded with the .416 | 400gr | Woodleigh HS. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,300 fps; across all powders the maximum-charge window runs from 1,250 fps to 2,300 fps. Accurate 2495 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 400.0 gr projectile in 0.416" calls for a 1:20.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 2700, Accurate 4064 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 1200-R, Alliant Power Pro 2000-MR rank at the top here: for .416 Taylor Mag. with the .416 | 400gr | Woodleigh HS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 4350, Alliant Reloder-16 burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.