Load Specifications
Load data in caliber 9.3 x 62 with .366 | 320gr | Woodleigh RN SN bullet and 96 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.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 50,778 psi | 90% | 2100 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 48,689 psi | 86% | 2116 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 50,850 psi | 90% | 2149 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 48,240 psi | 85% | 2156 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 50,633 psi | 90% | 2185 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,992 psi | 81% | 2195 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 88% | 49,530 psi | 88% | 2172 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 94% | 50,270 psi | 89% | 2169 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 49,023 psi | 87% | 2139 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 48,588 psi | 86% | 2119 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 50,183 psi | 89% | 2215 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 48,240 psi | 85% | 2254 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 49,487 psi | 87% | 2188 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 50,647 psi | 90% | 2100 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 50,444 psi | 89% | 2205 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,977 psi | 81% | 2201 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 98% | 49,617 psi | 88% | 2280 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,489 psi | 57% | 1995 fps | 96.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 48,805 psi | 86% | 2185 fps | 99.1% |
| Bofors RP3 | <<locked>> | 94% | 49,603 psi | 88% | 2198 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 50,604 psi | 89% | 2169 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 51,024 psi | 90% | 2123 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 50,386 psi | 89% | 2198 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 48,631 psi | 86% | 2228 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 48,979 psi | 87% | 2126 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 50,923 psi | 90% | 2205 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 98% | 51,097 psi | 90% | 2257 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 88% | 49,922 psi | 88% | 2182 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,032 psi | 74% | 2106 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 48,211 psi | 85% | 2205 fps | 99.9% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 50,720 psi | 90% | 2264 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,853 psi | 62% | 1293 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 50,183 psi | 89% | 2172 fps | 99.9% |
| IMR 3031 | <<locked>> | 92% | 50,850 psi | 90% | 2188 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 49,255 psi | 87% | 2149 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 94% | 49,139 psi | 87% | 2119 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,705 psi | 88% | 2159 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 39,175 psi | 69% | 2080 fps | 97.4% |
| IMR 4895 | <<locked>> | 90% | 48,399 psi | 86% | 2188 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 49,023 psi | 87% | 2139 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 48,631 psi | 86% | 2126 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 48,240 psi | 85% | 2156 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 50,111 psi | 89% | 2119 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 49,545 psi | 88% | 2159 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 48,211 psi | 85% | 2149 fps | 97.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,805 psi | 86% | 2175 fps | 96.8% |
| Norma 201 | <<locked>> | 88% | 48,414 psi | 86% | 2129 fps | 100% |
| Norma 202 | <<locked>> | 88% | 48,733 psi | 86% | 2136 fps | 100% |
| Norma 203B | <<locked>> | 92% | 49,603 psi | 88% | 2195 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 46,137 psi | 82% | 2192 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 92% | 49,603 psi | 88% | 2215 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,281 psi | 80% | 2185 fps | 96.7% |
| Ramshot TAC | <<locked>> | 86% | 49,124 psi | 87% | 2149 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 86% | 48,182 psi | 85% | 2165 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 49,821 psi | 88% | 2139 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,288 psi | 62% | 1325 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 48,530 psi | 86% | 2123 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,617 psi | 86% | 2152 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 49,864 psi | 88% | 2254 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 49,603 psi | 88% | 2283 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,730 psi | 81% | 2215 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,963 psi | 83% | 2234 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 86% | 49,937 psi | 88% | 2119 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 48,878 psi | 86% | 2129 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 49,197 psi | 87% | 2188 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 50,604 psi | 89% | 2169 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 48,211 psi | 85% | 2149 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 88% | 48,240 psi | 85% | 2156 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 49,545 psi | 88% | 2159 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,805 psi | 86% | 2175 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 51,068 psi | 90% | 2241 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 50,256 psi | 89% | 2169 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 51,024 psi | 90% | 2192 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 50,531 psi | 89% | 2087 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 49,937 psi | 88% | 2087 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,428 psi | 86% | 2113 fps | 96.4% |
| Somchem S321 | <<locked>> | 84% | 49,748 psi | 88% | 2165 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 49,559 psi | 88% | 2087 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 49,850 psi | 88% | 2165 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 50,024 psi | 88% | 2188 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,031 psi | 73% | 2152 fps | 99.8% |
| Unknown powderᴾ | <<locked>> | 100% | 50,589 psi | 89% | 2241 fps | 98.7% |
| Vihtavuori N130 | <<locked>> | 84% | 49,734 psi | 88% | 2054 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 49,864 psi | 88% | 2070 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 50,850 psi | 90% | 2139 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 48,254 psi | 85% | 2113 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 48,037 psi | 85% | 2136 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,908 psi | 90% | 2218 fps | 99% |
| Vihtavuori N530 | <<locked>> | 84% | 48,515 psi | 86% | 2139 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 50,952 psi | 90% | 2172 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,039 psi | 90% | 2257 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,229 psi | 61% | 2051 fps | 96.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,574 psi | 88% | 2182 fps | 99.9% |
| Winchester 748 | <<locked>> | 84% | 48,950 psi | 87% | 2182 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 51,097 psi | 90% | 2257 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 82% | 48,530 psi | 86% | 2172 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 42,105 psi | 74% | 1991 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,803 psi | 81% | 2080 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,621 psi | 61% | 1932 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,494 psi | 70% | 2034 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 32,764 psi | 58% | 1926 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 32,561 psi | 58% | 1978 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 38,696 psi | 68% | 2011 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 33,040 psi | 58% | 1896 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,698 psi | 72% | 2021 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 39,769 psi | 70% | 2011 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,123 psi | 83% | 2172 fps | 99.8% |
| Alliant Power Pro 2000-MR | 48 gr | 80% | 34,693 psi | 61% | 2021 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,111 psi | 57% | 1913 fps | 97.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,877 psi | 85% | 2067 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,606 psi | 61% | 1959 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,127 psi | 60% | 1991 fps | 95.5% |
| Alliant Reloder-17 | 48.5 gr | 82% | 29,573 psi | 52% | 1923 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 30,501 psi | 54% | 1949 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,376 psi | 66% | 2011 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 31,314 psi | 55% | 1913 fps | 97.4% |
| Bofors RP7 | <<locked>> | 96% | 47,601 psi | 84% | 2129 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,714 psi | 76% | 2014 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,595 psi | 68% | 2034 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,540 psi | 75% | 2139 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 43,149 psi | 76% | 2051 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 34,548 psi | 61% | 1955 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 92% | 42,090 psi | 74% | 2126 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 38,943 psi | 69% | 2021 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,254 psi | 52% | 1873 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,766 psi | 61% | 1995 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 98% | 47,384 psi | 84% | 2218 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,918 psi | 46% | 1155 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,737 psi | 61% | 1936 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 34,940 psi | 62% | 1969 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 32,358 psi | 57% | 1877 fps | 95.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 43,903 psi | 78% | 2044 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 43,961 psi | 78% | 2073 fps | 95.1% |
| IMR 4831 | <<locked>> | 94% | 32,547 psi | 58% | 1962 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 35,375 psi | 63% | 1982 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 80% | 40,698 psi | 72% | 2021 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 45,440 psi | 80% | 2083 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,086 psi | 66% | 1998 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 39,494 psi | 70% | 1965 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 34,345 psi | 61% | 1926 fps | 98.4% |
| Lovex S065 | <<locked>> | 90% | 37,985 psi | 67% | 1991 fps | 95.2% |
| Lovex S070 | <<locked>> | 96% | 43,004 psi | 76% | 2090 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 37,942 psi | 67% | 1975 fps | 99% |
| Norma 202 | <<locked>> | 80% | 38,072 psi | 67% | 1988 fps | 100% |
| Norma 203B | <<locked>> | 80% | 33,982 psi | 60% | 1952 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 33,765 psi | 60% | 1985 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 33,286 psi | 59% | 1955 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 96% | 40,045 psi | 71% | 2100 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 40,408 psi | 71% | 2018 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,581 psi | 70% | 2037 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,859 psi | 78% | 2057 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,179 psi | 46% | 1181 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,672 psi | 81% | 2083 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 39,987 psi | 71% | 2024 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 35,636 psi | 63% | 2031 fps | 97% |
| ReloadSwiss RS 60 | 47.3 gr | 80% | 29,486 psi | 52% | 1929 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 34,983 psi | 62% | 2037 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 38,580 psi | 68% | 2093 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 41,698 psi | 74% | 2008 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,216 psi | 64% | 1939 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 29,457 psi | 52% | 1870 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 96% | 47,601 psi | 84% | 2129 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 37,985 psi | 67% | 1991 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,086 psi | 66% | 1998 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 34,345 psi | 61% | 1926 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 96% | 43,004 psi | 76% | 2090 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,719 psi | 54% | 1909 fps | 95.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,464 psi | 68% | 1998 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,231 psi | 66% | 1988 fps | 97.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,769 psi | 70% | 1946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,692 psi | 58% | 1847 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 42,308 psi | 75% | 2031 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 43,410 psi | 77% | 2080 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 39,073 psi | 69% | 1949 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,043 psi | 67% | 1998 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 30,618 psi | 54% | 1877 fps | 96.5% |
| Somchem S365 | <<locked>> | 84% | 25,063 psi | 44% | 1821 fps | 95% |
| Unknown powder | <<locked>> | 90% | 36,840 psi | 65% | 2031 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 44,208 psi | 78% | 1985 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,347 psi | 66% | 1906 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,215 psi | 62% | 1932 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,433 psi | 63% | 1929 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 26,179 psi | 46% | 1768 fps | 96.2% |
| Vihtavuori N160 | <<locked>> | 88% | 34,592 psi | 61% | 1969 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 42,583 psi | 75% | 2057 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 35,070 psi | 62% | 1946 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 34,766 psi | 61% | 2008 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 30,298 psi | 54% | 1969 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 29,675 psi | 52% | 1850 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 42,496 psi | 75% | 2096 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 42,090 psi | 74% | 2126 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,208 psi | 80% | 2129 fps | 99.6% |
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 96 powders for 9.3 x 62 loaded with the .366 | 320gr | Woodleigh RN SN. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,283 fps; across all powders the maximum-charge window runs from 1,293 fps to 2,283 fps. Accurate 4350 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 320.0 gr projectile in 0.366" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. 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 9.3 x 62 with the .366 | 320gr | Woodleigh RN 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.