Load Specifications
Load data in caliber 9.3 x 57 with .366 | 300gr | Reichenberg Super Penetrator bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, IMR 3031 and Winchester 748.
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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 37,304 psi | 86% | 1919 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 37,710 psi | 87% | 1952 fps | 98.8% |
| Accurate 2495 | <<locked>> | 94% | 36,985 psi | 85% | 1982 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 37,927 psi | 87% | 1991 fps | 98.6% |
| Accurate 4064 | <<locked>> | 96% | 37,072 psi | 85% | 2005 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 90% | 38,986 psi | 90% | 1991 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 39,030 psi | 90% | 1969 fps | 97.1% |
| Alliant AR-Comp | <<locked>> | 90% | 39,218 psi | 90% | 2011 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 39,015 psi | 90% | 2031 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 37,666 psi | 87% | 1998 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 82% | 38,029 psi | 87% | 1932 fps | 100% |
| Bofors RP3 | <<locked>> | 98% | 39,204 psi | 90% | 2037 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 39,349 psi | 90% | 1936 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 90% | 38,682 psi | 89% | 2021 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 84% | 39,247 psi | 90% | 1985 fps | 99.7% |
| Hodgdon H335 | <<locked>> | 82% | 36,883 psi | 85% | 1959 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 90% | 39,146 psi | 90% | 2001 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 37,478 psi | 86% | 2011 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,938 psi | 76% | 1234 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 38,377 psi | 88% | 1969 fps | 96.1% |
| IMR 3031 | <<locked>> | 90% | 37,188 psi | 85% | 2005 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 39,030 psi | 90% | 1969 fps | 97.1% |
| Lovex D073.5 | <<locked>> | 84% | 37,594 psi | 86% | 1955 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 92% | 38,667 psi | 89% | 2014 fps | 98.7% |
| Lovex S062 | <<locked>> | 94% | 38,319 psi | 88% | 1978 fps | 97.1% |
| Norma 201 | <<locked>> | 90% | 37,869 psi | 87% | 1955 fps | 97% |
| Norma 202 | <<locked>> | 90% | 37,782 psi | 87% | 1972 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,938 psi | 76% | 1263 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 38,769 psi | 89% | 1965 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 38,624 psi | 89% | 2067 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 88% | 39,175 psi | 90% | 1959 fps | 99% |
| Rottweil R 902 | <<locked>> | 92% | 38,130 psi | 88% | 1952 fps | 97% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 38,856 psi | 89% | 2024 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 92% | 38,667 psi | 89% | 2014 fps | 98.7% |
| Shooters World Precision | <<locked>> | 94% | 38,319 psi | 88% | 1978 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 38,696 psi | 89% | 1932 fps | 96.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 38,885 psi | 89% | 1942 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 38,261 psi | 88% | 1903 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 37,043 psi | 85% | 1903 fps | 99.4% |
| Somchem S321 | <<locked>> | 86% | 38,957 psi | 90% | 1991 fps | 97.5% |
| Somchem S335 | <<locked>> | 88% | 37,101 psi | 85% | 1906 fps | 99.3% |
| Somchem S355 | <<locked>> | 98% | 38,276 psi | 88% | 1998 fps | 96.2% |
| Vihtavuori N130 | <<locked>> | 84% | 38,522 psi | 89% | 1900 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 37,956 psi | 87% | 1906 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 38,609 psi | 89% | 1988 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 38,276 psi | 88% | 1962 fps | 99.3% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 39,044 psi | 90% | 1988 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 88% | 38,827 psi | 89% | 1965 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 94% | 38,943 psi | 90% | 1988 fps | 99% |
| Winchester 748 | <<locked>> | 88% | 37,362 psi | 86% | 1995 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 92% | 39,117 psi | 90% | 2011 fps | 96.4% |
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% | 30,806 psi | 71% | 1814 fps | 99.4% |
| Accurate 2460 | <<locked>> | 80% | 32,909 psi | 76% | 1873 fps | 97.8% |
| Accurate 2495 | <<locked>> | 80% | 22,960 psi | 53% | 1719 fps | 97.7% |
| Accurate 2520 | <<locked>> | 80% | 28,674 psi | 66% | 1827 fps | 96% |
| Accurate 4064 | <<locked>> | 82% | 23,395 psi | 54% | 1736 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 88% | 36,608 psi | 84% | 1952 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 82% | 32,314 psi | 74% | 1854 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 28,282 psi | 65% | 1831 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 34,156 psi | 79% | 1946 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 33,170 psi | 76% | 1919 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 35,839 psi | 82% | 1900 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 34,272 psi | 79% | 1959 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 32,648 psi | 75% | 1821 fps | 95.8% |
| Hodgdon BL-C2 | <<locked>> | 84% | 31,473 psi | 72% | 1896 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 34,447 psi | 79% | 1906 fps | 99.1% |
| Hodgdon H335 | <<locked>> | 80% | 34,621 psi | 80% | 1919 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 86% | 34,505 psi | 79% | 1923 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 35,027 psi | 81% | 1969 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,366 psi | 56% | 1099 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 36,071 psi | 83% | 1932 fps | 95.4% |
| IMR 3031 | 34.9 gr | 80% | 27,093 psi | 62% | 1814 fps | 98% |
| IMR 8208 XBR | <<locked>> | 82% | 32,314 psi | 74% | 1854 fps | 95% |
| Lovex D073.5 | <<locked>> | 80% | 32,576 psi | 75% | 1870 fps | 96.4% |
| Lovex D073.6 | <<locked>> | 82% | 27,296 psi | 63% | 1811 fps | 95.4% |
| Lovex S062 | <<locked>> | 88% | 31,618 psi | 73% | 1860 fps | 95% |
| Norma 201 | <<locked>> | 86% | 33,562 psi | 77% | 1883 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 27,441 psi | 63% | 1781 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,236 psi | 56% | 1125 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 34,098 psi | 78% | 1886 fps | 97.3% |
| ReloadSwiss RS 60 | 43.5 gr | 92% | 31,734 psi | 73% | 1929 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 30,821 psi | 71% | 1814 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 86% | 31,705 psi | 73% | 1841 fps | 95% |
| Rottweil R 903 | <<locked>> | 96% | 33,939 psi | 78% | 1946 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 82% | 27,296 psi | 63% | 1811 fps | 95.4% |
| Shooters World Precision | <<locked>> | 88% | 31,618 psi | 73% | 1860 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 36,027 psi | 83% | 1890 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,347 psi | 84% | 1903 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 29,805 psi | 69% | 1759 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 24,047 psi | 55% | 1654 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 31,575 psi | 73% | 1864 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 29,037 psi | 67% | 1762 fps | 97.5% |
| Somchem S355 | <<locked>> | 96% | 35,897 psi | 83% | 1959 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 34,084 psi | 78% | 1831 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 29,631 psi | 68% | 1768 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 80% | 24,613 psi | 57% | 1732 fps | 98% |
| Vihtavuori N140 | <<locked>> | 80% | 26,078 psi | 60% | 1736 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 92% | 30,414 psi | 70% | 1841 fps | 95% |
| Vihtavuori N530 | <<locked>> | 82% | 31,923 psi | 73% | 1847 fps | 95% |
| Vihtavuori N540 | <<locked>> | 82% | 26,542 psi | 61% | 1762 fps | 95.5% |
| Winchester 748 | 38.7 gr | 82% | 30,530 psi | 70% | 1867 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 36,463 psi | 84% | 1969 fps | 95.6% |
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 51 powders for 9.3 x 57 loaded with the .366 | 300gr | Reichenberg Super Penetrator. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,067 fps; across all powders the maximum-charge window runs from 1,234 fps to 2,067 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 51 of the 51 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 76–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.366" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Rottweil R 903 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, IMR 3031, Winchester 748 rank at the top here: for 9.3 x 57 with the .366 | 300gr | Reichenberg Super Penetrator they combine a high case fill with complete burn and sit in the upper velocity band. 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.