Load Specifications
Load data in caliber 9.3 x 57 with .366 | 250gr | Barnes TTSX BT bullet and 38 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Alliant AR-Comp and Hodgdon H322.
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>> | 92% | 38,101 psi | 88% | 2133 fps | 99.4% |
| Accurate 2460 | <<locked>> | 90% | 38,885 psi | 89% | 2165 fps | 97.2% |
| Accurate 2495ᴾ | <<locked>> | 100% | 36,680 psi | 84% | 2185 fps | 99.5% |
| Accurate 2520 | <<locked>> | 94% | 38,653 psi | 89% | 2201 fps | 96.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 34,229 psi | 79% | 2156 fps | 97% |
| Accurate LT-30 | <<locked>> | 82% | 37,347 psi | 86% | 2034 fps | 98.1% |
| Accurate LT-32 | <<locked>> | 82% | 37,811 psi | 87% | 2037 fps | 96.3% |
| ADI AR 2207 | <<locked>> | 82% | 38,856 psi | 89% | 2113 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 39,349 psi | 90% | 2185 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 94% | 37,391 psi | 86% | 2192 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 38,972 psi | 90% | 2156 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 37,681 psi | 87% | 2067 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 88% | 38,218 psi | 88% | 2165 fps | 98.2% |
| Hodgdon H335 | <<locked>> | 88% | 38,406 psi | 88% | 2175 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,792 psi | 73% | 1348 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 38,043 psi | 87% | 2218 fps | 98.9% |
| IMR 4198 | <<locked>> | 86% | 39,131 psi | 90% | 2110 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 36,840 psi | 85% | 2129 fps | 95.9% |
| Lovex D073.5 | <<locked>> | 90% | 38,696 psi | 89% | 2162 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 98% | 39,015 psi | 90% | 2218 fps | 96.9% |
| Norma 200 | <<locked>> | 84% | 38,972 psi | 90% | 2139 fps | 100% |
| Norma 202 | <<locked>> | 96% | 38,522 psi | 89% | 2178 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,589 psi | 73% | 1378 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 37,913 psi | 87% | 2139 fps | 96% |
| Rottweil R 901 | <<locked>> | 92% | 37,565 psi | 86% | 2129 fps | 96.9% |
| Shooters World AR Plus | <<locked>> | 82% | 36,840 psi | 85% | 2129 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 98% | 39,015 psi | 90% | 2218 fps | 96.9% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 36,927 psi | 85% | 2139 fps | 96.8% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 37,739 psi | 87% | 2123 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 37,492 psi | 86% | 2077 fps | 96.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 38,261 psi | 88% | 2106 fps | 98.1% |
| Somchem S335 | <<locked>> | 94% | 38,203 psi | 88% | 2113 fps | 98% |
| Vihtavuori N120 | <<locked>> | 82% | 39,044 psi | 90% | 2077 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 37,550 psi | 86% | 2083 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 94% | 39,117 psi | 90% | 2119 fps | 99.4% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 38,885 psi | 89% | 2198 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 98% | 39,204 psi | 90% | 2169 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 98% | 37,478 psi | 86% | 2156 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% | 25,991 psi | 60% | 1893 fps | 96.2% |
| Accurate 2460 | <<locked>> | 84% | 31,546 psi | 73% | 2034 fps | 95% |
| Accurate 2495 | <<locked>> | 86% | 22,539 psi | 52% | 1890 fps | 95.2% |
| Accurate 2520 | <<locked>> | 90% | 33,359 psi | 77% | 2106 fps | 95.2% |
| Accurate 4064 | <<locked>> | 96% | 29,965 psi | 69% | 2070 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 35,056 psi | 81% | 1995 fps | 97.5% |
| Accurate LT-32 | <<locked>> | 80% | 35,447 psi | 81% | 1998 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 36,593 psi | 84% | 2077 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 32,227 psi | 74% | 2051 fps | 96.5% |
| Alliant AR-Comp | 35.2 gr | 80% | 24,120 psi | 55% | 1903 fps | 97.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,342 psi | 70% | 1998 fps | 98.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 32,996 psi | 76% | 1985 fps | 97.3% |
| Hodgdon H322 | 36.3 gr | 80% | 29,370 psi | 68% | 1985 fps | 95.4% |
| Hodgdon H335 | <<locked>> | 82% | 31,430 psi | 72% | 2041 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,467 psi | 54% | 1204 fps | 100% |
| IMR 3031 | 37.8 gr | 86% | 27,847 psi | 64% | 2005 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 32,648 psi | 75% | 1995 fps | 99.6% |
| Lovex D073.4 | <<locked>> | 80% | 34,214 psi | 79% | 2080 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 88% | 36,071 psi | 83% | 2116 fps | 95% |
| Lovex D073.6 | <<locked>> | 94% | 33,881 psi | 78% | 2126 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 34,243 psi | 79% | 2060 fps | 99.7% |
| Norma 202 | <<locked>> | 90% | 32,024 psi | 74% | 2060 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,192 psi | 53% | 1230 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 35,563 psi | 82% | 2096 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 88% | 33,388 psi | 77% | 2051 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 34,214 psi | 79% | 2080 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 94% | 33,881 psi | 78% | 2126 fps | 95.3% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 32,372 psi | 74% | 2054 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 31,183 psi | 72% | 1998 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 32,909 psi | 76% | 1991 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 30,066 psi | 69% | 1952 fps | 95.6% |
| Somchem S335 | <<locked>> | 86% | 29,791 psi | 68% | 1955 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 36,825 psi | 85% | 2044 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 29,414 psi | 68% | 1929 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 80% | 25,541 psi | 59% | 1850 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 84% | 23,598 psi | 54% | 1877 fps | 95% |
| Vihtavuori N140 | <<locked>> | 90% | 30,516 psi | 70% | 2005 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 94% | 33,141 psi | 76% | 2073 fps | 95.5% |
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 74 powders for 9.3 x 57 loaded with the .366 | 250gr | Barnes TTSX BT. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,238 fps; across all powders the maximum-charge window runs from 1,348 fps to 2,238 fps. Accurate 2495 gives the best case fill at 100 %, and 74 of the 74 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 250.0 gr projectile in 0.366" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2208 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. IMR 3031, Alliant AR-Comp, Hodgdon H322 rank at the top here: for 9.3 x 57 with the .366 | 250gr | Barnes TTSX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2230, ADI AR 2206H, ADI AR 2208 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.