Load Specifications
Load data in caliber 9.3 x 66 Sako with .366 | 184gr | Geco ZERO bullet and 55 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H322, ADI AR 2219 and SNPE Vectan SP 10.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 86% | 52,750 psi | 88% | 2808 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 52,750 psi | 88% | 2890 fps | 100% |
| Accurate 2460 | <<locked>> | 96% | 51,590 psi | 86% | 2900 fps | 98.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 40,190 psi | 67% | 2756 fps | 99.4% |
| Accurate 2520ᴾ | <<locked>> | 100% | 49,705 psi | 83% | 2920 fps | 98.1% |
| Accurate 4064ᴾ | <<locked>> | 100% | 37,420 psi | 62% | 2713 fps | 96.7% |
| Accurate LT-30 | <<locked>> | 92% | 53,403 psi | 89% | 2818 fps | 99.7% |
| Accurate LT-32 | <<locked>> | 92% | 53,896 psi | 90% | 2831 fps | 98.6% |
| ADI AR 2207 | <<locked>> | 90% | 52,982 psi | 88% | 2861 fps | 100% |
| ADI AR 2219 | <<locked>> | 92% | 51,459 psi | 85% | 2923 fps | 99.5% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 52,199 psi | 87% | 2907 fps | 96.9% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 49,095 psi | 82% | 2923 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 52,446 psi | 87% | 3009 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 96% | 53,388 psi | 89% | 2920 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 88% | 51,329 psi | 85% | 2825 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 51,880 psi | 86% | 2812 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 98% | 52,214 psi | 87% | 2861 fps | 97.5% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 49,501 psi | 82% | 2927 fps | 97.1% |
| Hodgdon H322 | <<locked>> | 96% | 52,852 psi | 88% | 2943 fps | 99.6% |
| Hodgdon H335 | <<locked>> | 96% | 54,418 psi | 90% | 2969 fps | 99.2% |
| Hodgdon H4198 | <<locked>> | 88% | 52,243 psi | 87% | 2822 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,155 psi | 53% | 1739 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 46,456 psi | 77% | 2904 fps | 99.5% |
| IMR 4198 | <<locked>> | 94% | 51,982 psi | 86% | 2851 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 52,330 psi | 87% | 2782 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 52,199 psi | 87% | 2907 fps | 96.9% |
| Lovex D073.4 | <<locked>> | 90% | 52,692 psi | 88% | 2923 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 96% | 51,938 psi | 86% | 2904 fps | 97.8% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 45,788 psi | 76% | 2854 fps | 97.4% |
| Lovex S053 | <<locked>> | 86% | 53,751 psi | 89% | 2769 fps | 100% |
| Norma 200 | <<locked>> | 92% | 53,577 psi | 89% | 2900 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 47,253 psi | 79% | 2828 fps | 95.9% |
| Norma 202ᴾ | <<locked>> | 100% | 47,398 psi | 79% | 2858 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,966 psi | 53% | 1778 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 52,112 psi | 87% | 2818 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 52,634 psi | 87% | 2917 fps | 98.3% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 51,343 psi | 85% | 2890 fps | 98.7% |
| Shooters World AR Plus | <<locked>> | 90% | 52,692 psi | 88% | 2923 fps | 98.4% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 45,788 psi | 76% | 2854 fps | 97.4% |
| Shooters World Tactical Rifle | <<locked>> | 94% | 53,838 psi | 89% | 2884 fps | 96.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 51,561 psi | 86% | 2582 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 51,764 psi | 86% | 2923 fps | 98.9% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 51,605 psi | 86% | 2887 fps | 99.8% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 51,155 psi | 85% | 2818 fps | 98.7% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 40,814 psi | 68% | 2657 fps | 97.9% |
| Somchem S321 | <<locked>> | 98% | 53,476 psi | 89% | 2953 fps | 97.4% |
| Somchem S335ᴾ | <<locked>> | 100% | 49,110 psi | 82% | 2812 fps | 99.1% |
| Vihtavuori N120 | <<locked>> | 90% | 53,026 psi | 88% | 2812 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 54,143 psi | 90% | 2864 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 50,241 psi | 83% | 2818 fps | 99.9% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,003 psi | 70% | 2772 fps | 99.5% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 44,744 psi | 74% | 2782 fps | 98.2% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 53,098 psi | 88% | 2913 fps | 97.1% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 43,294 psi | 72% | 2772 fps | 97.4% |
| Winchester 748ᴾ | <<locked>> | 100% | 50,633 psi | 84% | 2943 fps | 97.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 43,163 psi | 72% | 2654 fps | 99.8% |
| Accurate 2015 | <<locked>> | 80% | 27,615 psi | 46% | 2388 fps | 95.5% |
| Accurate 2460 | <<locked>> | 86% | 36,303 psi | 60% | 2618 fps | 95.4% |
| Accurate 2495 | <<locked>> | 88% | 26,440 psi | 44% | 2434 fps | 95.5% |
| Accurate 2520 | <<locked>> | 92% | 37,130 psi | 62% | 2687 fps | 95.1% |
| Accurate 4064 | <<locked>> | 96% | 32,793 psi | 54% | 2608 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 36,898 psi | 61% | 2523 fps | 97.1% |
| Accurate LT-32 | <<locked>> | 80% | 37,304 psi | 62% | 2530 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 38,537 psi | 64% | 2628 fps | 100% |
| ADI AR 2219 | 51.6 gr | 80% | 33,982 psi | 56% | 2582 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 96% | 45,905 psi | 76% | 2799 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 25,556 psi | 42% | 2398 fps | 97.1% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 49,197 psi | 82% | 2953 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 32,242 psi | 54% | 2520 fps | 98.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 40,016 psi | 66% | 2631 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,012 psi | 58% | 2503 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 92% | 43,424 psi | 72% | 2707 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 96% | 42,902 psi | 71% | 2808 fps | 95.5% |
| Hodgdon H322 | 51.2 gr | 82% | 33,272 psi | 55% | 2562 fps | 95.7% |
| Hodgdon H335 | <<locked>> | 84% | 35,955 psi | 60% | 2628 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 40,770 psi | 68% | 2618 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,424 psi | 39% | 1552 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 29,486 psi | 49% | 2520 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 34,171 psi | 57% | 2523 fps | 99.3% |
| IMR 4227 | <<locked>> | 80% | 46,296 psi | 77% | 2690 fps | 100% |
| IMR 8208 XBR | <<locked>> | 96% | 45,905 psi | 76% | 2799 fps | 95.4% |
| Lovex D073.4 | <<locked>> | 82% | 39,276 psi | 65% | 2684 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 90% | 41,901 psi | 70% | 2730 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 94% | 36,927 psi | 61% | 2684 fps | 95.1% |
| Lovex S053 | <<locked>> | 80% | 45,034 psi | 75% | 2641 fps | 100% |
| Norma 200 | <<locked>> | 80% | 36,260 psi | 60% | 2598 fps | 99.5% |
| Norma 201 | <<locked>> | 98% | 44,382 psi | 74% | 2776 fps | 95.2% |
| Norma 202 | <<locked>> | 92% | 36,579 psi | 61% | 2648 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,409 psi | 39% | 1591 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 45,759 psi | 76% | 2720 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 40,393 psi | 67% | 2697 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 88% | 35,679 psi | 59% | 2589 fps | 95.1% |
| Shooters World AR Plus | <<locked>> | 82% | 39,276 psi | 65% | 2684 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 94% | 36,927 psi | 61% | 2684 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 46,702 psi | 78% | 2769 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 41,597 psi | 69% | 2438 fps | 100% |
| SNPE Vectan SP 10 | 54.8 gr | 82% | 36,941 psi | 61% | 2641 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 32,938 psi | 55% | 2526 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 34,998 psi | 58% | 2516 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 31,865 psi | 53% | 2461 fps | 95.1% |
| Somchem S321 | <<locked>> | 92% | 43,482 psi | 72% | 2779 fps | 95.2% |
| Somchem S335 | <<locked>> | 86% | 31,850 psi | 53% | 2467 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 38,769 psi | 64% | 2589 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,038 psi | 52% | 2438 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 82% | 28,732 psi | 48% | 2385 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 86% | 26,745 psi | 44% | 2411 fps | 95.2% |
| Vihtavuori N140 | <<locked>> | 92% | 34,679 psi | 58% | 2579 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 96% | 46,427 psi | 77% | 2802 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 94% | 35,447 psi | 59% | 2608 fps | 95.1% |
| Winchester 748 | <<locked>> | 94% | 41,423 psi | 69% | 2772 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 55 powders for 9.3 x 66 Sako loaded with the .366 | 184gr | Geco ZERO. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 3,009 fps; across all powders the maximum-charge window runs from 1,739 fps to 3,009 fps. Accurate 2015 gives the best case fill at 100 %, and 55 of the 55 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 184.0 gr projectile in 0.366" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2495, Accurate 2520 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 H322, ADI AR 2219, SNPE Vectan SP 10 rank at the top here: for 9.3 x 66 Sako with the .366 | 184gr | Geco ZERO 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.