Load Specifications
Load data in caliber 9.3 x 57 with .366 | 286gr | North Fork Flat Point Solid bullet and 46 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 Accurate 4064.
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% | 37,652 psi | 87% | 1975 fps | 99.9% |
| Accurate 2460 | <<locked>> | 84% | 38,290 psi | 88% | 2011 fps | 98.6% |
| Accurate 2495 | <<locked>> | 94% | 37,695 psi | 87% | 2041 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 38,899 psi | 89% | 2067 fps | 98.4% |
| Accurate 4064 | <<locked>> | 96% | 37,565 psi | 86% | 2060 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 88% | 39,349 psi | 90% | 2024 fps | 96.7% |
| Alliant AR-Comp | <<locked>> | 90% | 39,262 psi | 90% | 2067 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 39,146 psi | 90% | 2083 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 37,826 psi | 87% | 2051 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 82% | 38,450 psi | 88% | 1991 fps | 100% |
| Bofors RP3 | <<locked>> | 98% | 39,291 psi | 90% | 2090 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 37,231 psi | 86% | 1949 fps | 96.7% |
| Hodgdon BL-C2 | <<locked>> | 90% | 38,812 psi | 89% | 2073 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 86% | 38,783 psi | 89% | 2028 fps | 99.4% |
| Hodgdon H335 | <<locked>> | 82% | 39,262 psi | 90% | 2044 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,141 psi | 76% | 1270 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 38,566 psi | 89% | 2080 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 88% | 39,349 psi | 90% | 2024 fps | 96.7% |
| Lovex D073.5 | <<locked>> | 84% | 37,840 psi | 87% | 2005 fps | 97.4% |
| Lovex D073.6 | <<locked>> | 92% | 38,899 psi | 89% | 2067 fps | 98.4% |
| Lovex S062 | <<locked>> | 94% | 38,363 psi | 88% | 2028 fps | 96.7% |
| Norma 201 | <<locked>> | 90% | 38,406 psi | 88% | 2011 fps | 96.6% |
| Norma 202 | <<locked>> | 90% | 38,072 psi | 88% | 2028 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,170 psi | 76% | 1302 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 39,131 psi | 90% | 2018 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 38,827 psi | 89% | 2116 fps | 97.5% |
| Rottweil R 901 | <<locked>> | 86% | 37,695 psi | 87% | 1982 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 92% | 38,638 psi | 89% | 2008 fps | 96.6% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 39,233 psi | 90% | 2080 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 38,899 psi | 89% | 2067 fps | 98.4% |
| Shooters World Precision | <<locked>> | 94% | 38,363 psi | 88% | 2028 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 39,059 psi | 90% | 1985 fps | 96.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 39,073 psi | 90% | 1995 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 38,711 psi | 89% | 1959 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 37,318 psi | 86% | 1955 fps | 99.2% |
| Somchem S321 | <<locked>> | 86% | 38,986 psi | 90% | 2044 fps | 97% |
| Somchem S335 | <<locked>> | 88% | 37,637 psi | 87% | 1962 fps | 99.1% |
| Somchem S355 | <<locked>> | 98% | 38,421 psi | 88% | 2051 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 84% | 38,827 psi | 89% | 1955 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 38,406 psi | 88% | 1962 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 94% | 38,899 psi | 89% | 2044 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 38,203 psi | 88% | 2011 fps | 99% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 39,349 psi | 90% | 2044 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 88% | 39,102 psi | 90% | 2018 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 94% | 39,334 psi | 90% | 2047 fps | 98.8% |
| Winchester 748 | <<locked>> | 86% | 37,797 psi | 87% | 2051 fps | 97.3% |
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% | 31,386 psi | 72% | 1867 fps | 99.2% |
| Accurate 2460 | <<locked>> | 80% | 33,359 psi | 77% | 1926 fps | 97.4% |
| Accurate 2495 | <<locked>> | 80% | 23,888 psi | 55% | 1778 fps | 97.6% |
| Accurate 2520 | <<locked>> | 82% | 29,544 psi | 68% | 1900 fps | 95.7% |
| Accurate 4064 | 37.8 gr | 84% | 25,773 psi | 59% | 1831 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 34,650 psi | 80% | 1942 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 80% | 28,747 psi | 66% | 1883 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 36,709 psi | 84% | 2041 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 35,607 psi | 82% | 2011 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,056 psi | 83% | 1952 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 34,563 psi | 79% | 2011 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 33,011 psi | 76% | 1870 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 84% | 31,676 psi | 73% | 1942 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 80% | 32,097 psi | 74% | 1909 fps | 98.2% |
| Hodgdon H335 | <<locked>> | 80% | 36,724 psi | 84% | 2005 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,497 psi | 56% | 1132 fps | 100% |
| IMR 3031 | 34.4 gr | 80% | 25,353 psi | 58% | 1811 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 84% | 34,650 psi | 80% | 1942 fps | 95.3% |
| Lovex D073.5 | <<locked>> | 80% | 33,228 psi | 76% | 1926 fps | 96% |
| Lovex D073.6 | <<locked>> | 84% | 29,762 psi | 68% | 1903 fps | 95.8% |
| Lovex S062 | <<locked>> | 90% | 34,185 psi | 79% | 1955 fps | 95.4% |
| Norma 201 | <<locked>> | 86% | 33,997 psi | 78% | 1932 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 27,891 psi | 64% | 1834 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,410 psi | 56% | 1158 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 34,360 psi | 79% | 1936 fps | 96.8% |
| ReloadSwiss RS 60 | 45.3 gr | 94% | 34,084 psi | 78% | 2021 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 31,444 psi | 72% | 1867 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 88% | 34,200 psi | 79% | 1932 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 98% | 36,782 psi | 85% | 2041 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 29,762 psi | 68% | 1903 fps | 95.8% |
| Shooters World Precision | <<locked>> | 90% | 34,185 psi | 79% | 1955 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 36,463 psi | 84% | 1942 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,622 psi | 84% | 1959 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 30,298 psi | 70% | 1808 fps | 96.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 24,584 psi | 56% | 1703 fps | 95.3% |
| Somchem S321 | <<locked>> | 82% | 34,316 psi | 79% | 1962 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 29,573 psi | 68% | 1814 fps | 97.3% |
| Somchem S355 | <<locked>> | 96% | 36,172 psi | 83% | 2011 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 34,548 psi | 79% | 1886 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 80% | 30,081 psi | 69% | 1821 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 80% | 25,208 psi | 58% | 1788 fps | 97.8% |
| Vihtavuori N140 | <<locked>> | 80% | 26,527 psi | 61% | 1788 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 94% | 32,503 psi | 75% | 1926 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 84% | 34,272 psi | 79% | 1936 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 82% | 26,934 psi | 62% | 1811 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 31,198 psi | 72% | 1926 fps | 95% |
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 46 powders for 9.3 x 57 loaded with the .366 | 286gr | North Fork Flat Point Solid. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,116 fps; across all powders the maximum-charge window runs from 1,270 fps to 2,116 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 46 of the 46 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 286.0 gr projectile in 0.366" calls for a 1:16.0 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, Accurate 4064 rank at the top here: for 9.3 x 57 with the .366 | 286gr | North Fork Flat Point Solid 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.