Load Specifications
Load data in caliber 9.3 x 57 with .366 | 293gr | RWS UNI Classic bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Hodgdon LEVERevolution and Bofors RP3.
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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 84% | 38,261 psi | 88% | 1978 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 38,696 psi | 89% | 2014 fps | 99.1% |
| Accurate 2495 | <<locked>> | 92% | 38,798 psi | 89% | 2051 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 38,769 psi | 89% | 2051 fps | 98.9% |
| Accurate 4064 | <<locked>> | 94% | 38,667 psi | 89% | 2070 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 37,333 psi | 86% | 1988 fps | 97% |
| Alliant AR-Comp | <<locked>> | 86% | 37,579 psi | 86% | 2034 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 38,479 psi | 88% | 2060 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 38,827 psi | 89% | 2113 fps | 95.9% |
| Bofors RP3 | <<locked>> | 94% | 37,840 psi | 87% | 2064 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 82% | 37,463 psi | 86% | 1952 fps | 97.5% |
| Hodgdon BL-C2 | <<locked>> | 86% | 36,695 psi | 84% | 2034 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 86% | 37,420 psi | 86% | 2021 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 37,942 psi | 87% | 2070 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,547 psi | 77% | 1280 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 38,609 psi | 89% | 2024 fps | 96.5% |
| IMR 3031 | <<locked>> | 88% | 38,232 psi | 88% | 2067 fps | 100% |
| IMR 4895 | <<locked>> | 90% | 38,145 psi | 88% | 2060 fps | 96% |
| IMR 8208 XBR | <<locked>> | 84% | 37,333 psi | 86% | 1988 fps | 97% |
| Lovex D073.5 | <<locked>> | 82% | 38,421 psi | 88% | 2011 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 88% | 37,173 psi | 85% | 2037 fps | 98.6% |
| Lovex S060 | <<locked>> | 86% | 38,870 psi | 89% | 1972 fps | 95.9% |
| Lovex S062 | <<locked>> | 92% | 39,117 psi | 90% | 2037 fps | 97.6% |
| Norma 201 | <<locked>> | 88% | 38,914 psi | 89% | 2021 fps | 97.5% |
| Norma 202 | <<locked>> | 88% | 38,711 psi | 89% | 2034 fps | 99.3% |
| Norma 203B | <<locked>> | 92% | 38,812 psi | 89% | 2064 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,605 psi | 77% | 1309 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 38,986 psi | 90% | 2129 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 84% | 38,000 psi | 87% | 1985 fps | 99% |
| Rottweil R 902 | <<locked>> | 90% | 39,146 psi | 90% | 2018 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 96% | 37,753 psi | 87% | 2054 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 88% | 37,173 psi | 85% | 2037 fps | 98.6% |
| Shooters World Precision | <<locked>> | 92% | 39,117 psi | 90% | 2037 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 38,174 psi | 88% | 2028 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 38,986 psi | 90% | 1962 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 37,695 psi | 87% | 1959 fps | 99.6% |
| Somchem S321 | <<locked>> | 84% | 39,349 psi | 90% | 2047 fps | 97.8% |
| Somchem S335 | <<locked>> | 86% | 37,942 psi | 87% | 1962 fps | 99.5% |
| Somchem S341 | <<locked>> | 88% | 39,247 psi | 90% | 2037 fps | 95.9% |
| Somchem S355 | <<locked>> | 96% | 39,059 psi | 90% | 2060 fps | 96.7% |
| Vihtavuori N130 | <<locked>> | 82% | 39,073 psi | 90% | 1952 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 38,740 psi | 89% | 1965 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 37,304 psi | 86% | 2011 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 38,914 psi | 89% | 2021 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 96% | 37,652 psi | 87% | 2018 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 84% | 36,970 psi | 85% | 1982 fps | 97% |
| Vihtavuori N540 | <<locked>> | 90% | 37,376 psi | 86% | 2011 fps | 99% |
| Winchester 748 | <<locked>> | 86% | 37,913 psi | 87% | 2054 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 37,072 psi | 85% | 2028 fps | 96.2% |
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% | 33,692 psi | 77% | 1903 fps | 99.8% |
| Accurate 2460 | <<locked>> | 80% | 36,260 psi | 83% | 1975 fps | 98.7% |
| Accurate 2495 | <<locked>> | 80% | 26,223 psi | 60% | 1824 fps | 98.9% |
| Accurate 2520 | <<locked>> | 80% | 31,589 psi | 73% | 1926 fps | 97.2% |
| Accurate 4064 | <<locked>> | 80% | 24,903 psi | 57% | 1801 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 80% | 32,808 psi | 75% | 1906 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 31,082 psi | 71% | 1926 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 32,111 psi | 74% | 1942 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 96% | 36,477 psi | 84% | 2070 fps | 95% |
| Bofors RP3 | 44 gr | 90% | 33,054 psi | 76% | 1978 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 35,172 psi | 81% | 1913 fps | 96.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 30,052 psi | 69% | 1909 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 84% | 35,288 psi | 81% | 1982 fps | 95.6% |
| Hodgdon LEVERevolution | 43.5 gr | 86% | 33,504 psi | 77% | 1988 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,743 psi | 57% | 1138 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 34,214 psi | 79% | 1946 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 29,573 psi | 68% | 1909 fps | 98.9% |
| IMR 4895 | <<locked>> | 88% | 35,781 psi | 82% | 2018 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 32,808 psi | 75% | 1906 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 80% | 35,752 psi | 82% | 1969 fps | 97.5% |
| Lovex D073.6 | <<locked>> | 80% | 28,384 psi | 65% | 1873 fps | 96.1% |
| Lovex S060 | <<locked>> | 84% | 36,506 psi | 84% | 1932 fps | 95.2% |
| Lovex S062 | <<locked>> | 86% | 32,619 psi | 75% | 1923 fps | 95.7% |
| Norma 201 | <<locked>> | 82% | 32,285 psi | 74% | 1900 fps | 95.5% |
| Norma 202 | <<locked>> | 80% | 30,110 psi | 69% | 1877 fps | 97.4% |
| Norma 203B | <<locked>> | 90% | 36,622 psi | 84% | 2028 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,918 psi | 57% | 1168 fps | 100% |
| ReloadSwiss RS 60 | 44.7 gr | 88% | 30,472 psi | 70% | 1952 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 33,852 psi | 78% | 1913 fps | 98.1% |
| Rottweil R 902 | <<locked>> | 84% | 32,677 psi | 75% | 1903 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 92% | 33,011 psi | 76% | 1972 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 28,384 psi | 65% | 1873 fps | 96.1% |
| Shooters World Precision | <<locked>> | 86% | 32,619 psi | 75% | 1923 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 35,868 psi | 82% | 1988 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,358 psi | 74% | 1847 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,194 psi | 60% | 1745 fps | 96.9% |
| Somchem S321 | <<locked>> | 80% | 34,650 psi | 80% | 1965 fps | 96.6% |
| Somchem S335 | <<locked>> | 80% | 31,720 psi | 73% | 1854 fps | 98.5% |
| Somchem S341 | <<locked>> | 86% | 36,854 psi | 85% | 1998 fps | 95.1% |
| Somchem S355 | <<locked>> | 92% | 34,708 psi | 80% | 1985 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 36,840 psi | 85% | 1919 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 32,184 psi | 74% | 1857 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 80% | 27,180 psi | 62% | 1827 fps | 99% |
| Vihtavuori N140 | <<locked>> | 80% | 28,471 psi | 65% | 1831 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 90% | 31,169 psi | 72% | 1900 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 32,387 psi | 74% | 1900 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 27,325 psi | 63% | 1821 fps | 96.1% |
| Winchester 748 | <<locked>> | 80% | 31,111 psi | 72% | 1926 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 86% | 34,824 psi | 80% | 1988 fps | 95.4% |
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 77 powders for 9.3 x 57 loaded with the .366 | 293gr | RWS UNI Classic. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,129 fps; across all powders the maximum-charge window runs from 1,280 fps to 2,129 fps. Accurate 4350 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 293.0 gr projectile in 0.366" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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, Hodgdon LEVERevolution, Bofors RP3 rank at the top here: for 9.3 x 57 with the .366 | 293gr | RWS UNI Classic they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, ADI AR 2208, Alliant Power Pro 2000-MR 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.