Load Specifications
Load data in caliber 9.3 x 57 with .366 | 286gr | North Fork Cup Point Solid bullet and 45 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon BL-C2, Accurate 2520 and IMR 3031.
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>> | 88% | 39,102 psi | 90% | 1985 fps | 99.9% |
| Accurate 2460 | <<locked>> | 84% | 37,130 psi | 85% | 1982 fps | 98.2% |
| Accurate 2495 | <<locked>> | 96% | 38,653 psi | 89% | 2047 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 37,797 psi | 87% | 2041 fps | 98% |
| Accurate 4064 | <<locked>> | 98% | 38,551 psi | 89% | 2067 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 82% | 39,189 psi | 90% | 2024 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 38,232 psi | 88% | 1991 fps | 96.2% |
| Alliant AR-Comp | <<locked>> | 90% | 38,305 psi | 88% | 2041 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 39,001 psi | 90% | 2057 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 82% | 37,318 psi | 86% | 1962 fps | 100% |
| Bofors RP3 | <<locked>> | 98% | 38,014 psi | 87% | 2057 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 86% | 38,667 psi | 89% | 1959 fps | 96.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 37,521 psi | 86% | 2041 fps | 96.8% |
| Hodgdon H322 | <<locked>> | 86% | 37,826 psi | 87% | 2001 fps | 99.2% |
| Hodgdon H335 | <<locked>> | 82% | 38,174 psi | 88% | 2018 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 38,798 psi | 89% | 2067 fps | 95.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,025 psi | 76% | 1260 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 37,376 psi | 86% | 2047 fps | 99.7% |
| IMR 4198 | <<locked>> | 82% | 38,943 psi | 90% | 1946 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 38,232 psi | 88% | 1991 fps | 96.2% |
| Lovex D073.5 | <<locked>> | 84% | 36,738 psi | 84% | 1975 fps | 96.9% |
| Lovex D073.6 | <<locked>> | 92% | 37,478 psi | 86% | 2034 fps | 97.9% |
| Lovex S062 | <<locked>> | 94% | 37,347 psi | 86% | 1998 fps | 96.1% |
| Norma 201 | <<locked>> | 90% | 37,333 psi | 86% | 1982 fps | 96.1% |
| Norma 202 | <<locked>> | 90% | 36,985 psi | 85% | 1998 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,040 psi | 76% | 1289 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 38,000 psi | 87% | 1988 fps | 97.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 37,710 psi | 87% | 2077 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 88% | 38,798 psi | 89% | 1988 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 92% | 37,521 psi | 86% | 1978 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 92% | 37,478 psi | 86% | 2034 fps | 97.9% |
| Shooters World Precision | <<locked>> | 94% | 37,347 psi | 86% | 1998 fps | 96.1% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 37,942 psi | 87% | 1969 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 37,565 psi | 86% | 1926 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 38,421 psi | 88% | 1959 fps | 99.2% |
| Somchem S321 | <<locked>> | 86% | 37,985 psi | 87% | 2014 fps | 96.5% |
| Somchem S335 | <<locked>> | 90% | 38,812 psi | 89% | 1969 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 84% | 37,826 psi | 87% | 1929 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 37,173 psi | 85% | 1932 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 94% | 37,637 psi | 87% | 2014 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 92% | 37,188 psi | 85% | 1982 fps | 98.7% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 38,247 psi | 88% | 2011 fps | 96.8% |
| Vihtavuori N530 | <<locked>> | 88% | 38,000 psi | 87% | 1988 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 94% | 38,116 psi | 88% | 2014 fps | 98.4% |
| Winchester 748 | <<locked>> | 86% | 36,869 psi | 85% | 2021 fps | 96.8% |
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% | 30,414 psi | 70% | 1841 fps | 98.9% |
| Accurate 2460 | <<locked>> | 80% | 32,430 psi | 75% | 1900 fps | 97% |
| Accurate 2495 | <<locked>> | 80% | 22,960 psi | 53% | 1745 fps | 97% |
| Accurate 2520 | 38.7 gr | 82% | 28,674 psi | 66% | 1873 fps | 95.1% |
| Accurate 4064 | <<locked>> | 84% | 24,860 psi | 57% | 1801 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 36,782 psi | 85% | 1985 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 35,940 psi | 83% | 1952 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 27,862 psi | 64% | 1854 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 36,927 psi | 85% | 2021 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 35,157 psi | 81% | 1929 fps | 100% |
| Bofors RP3 | <<locked>> | 96% | 35,563 psi | 82% | 2018 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 34,214 psi | 79% | 1883 fps | 95.6% |
| Hodgdon BL-C2 | 41 gr | 86% | 32,938 psi | 76% | 1959 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 31,444 psi | 72% | 1886 fps | 97.8% |
| Hodgdon H335 | <<locked>> | 80% | 35,868 psi | 82% | 1978 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 36,535 psi | 84% | 2028 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,439 psi | 56% | 1122 fps | 100% |
| IMR 3031 | 33.5 gr | 80% | 24,729 psi | 57% | 1785 fps | 96.1% |
| IMR 4198 | <<locked>> | 80% | 36,782 psi | 85% | 1913 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 35,940 psi | 83% | 1952 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 80% | 32,140 psi | 74% | 1893 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 84% | 28,674 psi | 66% | 1873 fps | 95.1% |
| Lovex S062 | <<locked>> | 92% | 35,317 psi | 81% | 1962 fps | 95.5% |
| Norma 201 | <<locked>> | 88% | 35,041 psi | 81% | 1942 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 27,064 psi | 62% | 1804 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,337 psi | 56% | 1148 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 33,460 psi | 77% | 1909 fps | 96.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 35,476 psi | 82% | 2034 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 30,705 psi | 71% | 1841 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 90% | 35,273 psi | 81% | 1939 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 28,674 psi | 66% | 1873 fps | 95.1% |
| Shooters World Precision | <<locked>> | 92% | 35,317 psi | 81% | 1962 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 35,795 psi | 82% | 1932 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 29,617 psi | 68% | 1785 fps | 96% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 25,396 psi | 58% | 1713 fps | 95.4% |
| Somchem S321 | <<locked>> | 82% | 33,286 psi | 77% | 1932 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 28,747 psi | 66% | 1788 fps | 96.8% |
| Vihtavuori N130 | <<locked>> | 80% | 33,779 psi | 78% | 1864 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 29,385 psi | 68% | 1798 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 80% | 24,540 psi | 56% | 1762 fps | 97.3% |
| Vihtavuori N140 | <<locked>> | 82% | 27,427 psi | 63% | 1798 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 96% | 33,678 psi | 77% | 1936 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 86% | 35,679 psi | 82% | 1949 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 84% | 27,891 psi | 64% | 1824 fps | 95.2% |
| Winchester 748 | <<locked>> | 82% | 32,401 psi | 74% | 1936 fps | 95.2% |
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 73 powders for 9.3 x 57 loaded with the .366 | 286gr | North Fork Cup Point Solid. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,077 fps; across all powders the maximum-charge window runs from 1,260 fps to 2,077 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 73 of the 73 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 1:15.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, Hodgdon TrailBoss, ReloadSwiss RS 14 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 BL-C2, Accurate 2520, IMR 3031 rank at the top here: for 9.3 x 57 with the .366 | 286gr | North Fork Cup Point Solid they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2206H, ADI AR 2208, Alliant Power Pro 2000-MR 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.