Load Specifications
Load data in caliber 9.3 x 66 Sako with .366 | 247gr | Copper Bear bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon CFE223.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 51,459 psi | 85% | 2441 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 51,619 psi | 86% | 2507 fps | 97.7% |
| Accurate 2230 | <<locked>> | 82% | 52,170 psi | 87% | 2520 fps | 98.1% |
| Accurate 2460 | <<locked>> | 88% | 53,287 psi | 89% | 2503 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 51,488 psi | 86% | 2497 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 53,867 psi | 89% | 2552 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 53,882 psi | 90% | 2566 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 51,924 psi | 86% | 2392 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 52,359 psi | 87% | 2411 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 94% | 53,359 psi | 89% | 2552 fps | 98.7% |
| ADI AR 2207 | <<locked>> | 82% | 53,534 psi | 89% | 2418 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 53,853 psi | 89% | 2536 fps | 98.1% |
| ADI AR 2219 | <<locked>> | 84% | 51,488 psi | 86% | 2497 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 52,837 psi | 88% | 2513 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 92% | 51,547 psi | 86% | 2507 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 54,070 psi | 90% | 2608 fps | 99.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 52,257 psi | 87% | 2628 fps | 97.6% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 52,707 psi | 88% | 2559 fps | 99.2% |
| Alliant Reloder-10x | <<locked>> | 86% | 51,735 psi | 86% | 2454 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 53,577 psi | 89% | 2575 fps | 98.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 46,789 psi | 78% | 2546 fps | 97.9% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 53,969 psi | 90% | 2434 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 52,402 psi | 87% | 2552 fps | 97.5% |
| Bofors RP3ᴾ | <<locked>> | 100% | 52,881 psi | 88% | 2572 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 90% | 52,098 psi | 87% | 2461 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 94% | 54,317 psi | 90% | 2585 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 90% | 52,388 psi | 87% | 2615 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 88% | 53,374 psi | 89% | 2523 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 51,082 psi | 85% | 2503 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 51,300 psi | 85% | 2530 fps | 96.6% |
| Hodgdon H4198 | <<locked>> | 82% | 53,969 psi | 90% | 2434 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 53,708 psi | 89% | 2562 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 51,459 psi | 85% | 2579 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,490 psi | 57% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 51,779 psi | 86% | 2516 fps | 98.8% |
| IMR 3031 | <<locked>> | 94% | 52,156 psi | 87% | 2556 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 53,388 psi | 89% | 2523 fps | 98.2% |
| IMR 4198 | <<locked>> | 86% | 51,866 psi | 86% | 2415 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 51,547 psi | 86% | 2559 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 92% | 52,837 psi | 88% | 2513 fps | 99.4% |
| Lovex D073.4 | <<locked>> | 82% | 53,171 psi | 88% | 2510 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 88% | 53,156 psi | 88% | 2510 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 94% | 51,924 psi | 86% | 2536 fps | 99.9% |
| Lovex S060 | <<locked>> | 94% | 53,969 psi | 90% | 2487 fps | 98.7% |
| Lovex S062 | <<locked>> | 98% | 52,953 psi | 88% | 2530 fps | 99.4% |
| Norma 200 | <<locked>> | 82% | 52,069 psi | 87% | 2431 fps | 100% |
| Norma 201 | <<locked>> | 94% | 52,286 psi | 87% | 2507 fps | 99.3% |
| Norma 202 | <<locked>> | 94% | 52,112 psi | 87% | 2513 fps | 100% |
| Norma 203B | <<locked>> | 98% | 52,591 psi | 87% | 2566 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 98% | 52,982 psi | 88% | 2589 fps | 98.4% |
| Ramshot TAC | <<locked>> | 92% | 53,519 psi | 89% | 2520 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 92% | 51,938 psi | 86% | 2539 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 90% | 54,360 psi | 90% | 2516 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,795 psi | 58% | 1535 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 52,750 psi | 88% | 2507 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 52,866 psi | 88% | 2631 fps | 98.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 49,893 psi | 83% | 2615 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 92% | 53,969 psi | 90% | 2503 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 52,663 psi | 87% | 2503 fps | 99.4% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 49,269 psi | 82% | 2513 fps | 98.6% |
| Shooters World AR Plus | <<locked>> | 82% | 53,171 psi | 88% | 2510 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 94% | 51,924 psi | 86% | 2536 fps | 99.9% |
| Shooters World Precision | <<locked>> | 98% | 52,953 psi | 88% | 2530 fps | 99.4% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 52,852 psi | 88% | 2477 fps | 99.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 53,534 psi | 89% | 2188 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 51,938 psi | 86% | 2507 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 50,981 psi | 85% | 2566 fps | 98.2% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 52,272 psi | 87% | 2464 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 51,271 psi | 85% | 2493 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 51,517 psi | 86% | 2523 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 51,750 psi | 86% | 2425 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 53,534 psi | 89% | 2457 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 54,012 psi | 90% | 2552 fps | 99.6% |
| Somchem S335 | <<locked>> | 94% | 53,490 psi | 89% | 2464 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 53,664 psi | 89% | 2539 fps | 98.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 50,111 psi | 83% | 2513 fps | 98.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,347 psi | 60% | 2352 fps | 96.6% |
| Vihtavuori N120 | <<locked>> | 82% | 53,316 psi | 89% | 2372 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 51,663 psi | 86% | 2405 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 54,215 psi | 90% | 2454 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 54,143 psi | 90% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 52,431 psi | 87% | 2493 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 48,327 psi | 80% | 2457 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 92% | 53,403 psi | 89% | 2516 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 98% | 53,882 psi | 90% | 2533 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 44,324 psi | 74% | 2398 fps | 97.2% |
| Winchester 748 | <<locked>> | 92% | 51,561 psi | 86% | 2552 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 96% | 54,157 psi | 90% | 2575 fps | 99.1% |
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 2015 | <<locked>> | 80% | 38,392 psi | 64% | 2244 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 48,414 psi | 80% | 2457 fps | 97.1% |
| Accurate 2230 | <<locked>> | 80% | 48,747 psi | 81% | 2467 fps | 97.5% |
| Accurate 2460 | <<locked>> | 80% | 41,379 psi | 69% | 2326 fps | 99.3% |
| Accurate 2495 | <<locked>> | 80% | 31,517 psi | 52% | 2165 fps | 99.6% |
| Accurate 2520 | <<locked>> | 80% | 36,579 psi | 61% | 2277 fps | 98.2% |
| Accurate 4064 | <<locked>> | 80% | 29,791 psi | 49% | 2146 fps | 97.4% |
| Accurate LT-30 | <<locked>> | 80% | 46,267 psi | 77% | 2313 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 46,572 psi | 77% | 2326 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 82% | 37,275 psi | 62% | 2277 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 50,546 psi | 84% | 2382 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 40,306 psi | 67% | 2320 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 45,165 psi | 75% | 2405 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,898 psi | 61% | 2247 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 80% | 35,244 psi | 59% | 2260 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,047 psi | 70% | 2415 fps | 97.3% |
| Alliant Power Pro 2000-MR | 57.4 gr | 90% | 43,221 psi | 72% | 2474 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 34,519 psi | 57% | 2247 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,424 psi | 72% | 2333 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 39,856 psi | 66% | 2349 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 94% | 38,740 psi | 64% | 2392 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 44,788 psi | 74% | 2310 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 43,424 psi | 72% | 2411 fps | 95.5% |
| Bofors RP3 | <<locked>> | 86% | 33,910 psi | 56% | 2251 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,015 psi | 65% | 2247 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,621 psi | 58% | 2257 fps | 96.5% |
| Hodgdon CFE223 | 53.5 gr | 82% | 40,408 psi | 67% | 2405 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 41,539 psi | 69% | 2346 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 80% | 42,221 psi | 70% | 2365 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 94% | 45,382 psi | 75% | 2438 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 50,720 psi | 84% | 2392 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,331 psi | 59% | 2244 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 35,505 psi | 59% | 2293 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,599 psi | 43% | 1335 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,056 psi | 60% | 2244 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 33,866 psi | 56% | 2254 fps | 99.4% |
| IMR 4064 | <<locked>> | 88% | 39,798 psi | 66% | 2303 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 43,859 psi | 73% | 2300 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 38,276 psi | 64% | 2333 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 36,898 psi | 61% | 2247 fps | 96.5% |
| Lovex D073.4 | <<locked>> | 80% | 49,676 psi | 83% | 2461 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 41,118 psi | 68% | 2326 fps | 98.4% |
| Lovex D073.6 | <<locked>> | 80% | 33,054 psi | 55% | 2215 fps | 97.2% |
| Lovex S060 | <<locked>> | 82% | 38,218 psi | 63% | 2228 fps | 95.4% |
| Lovex S062 | <<locked>> | 82% | 33,054 psi | 55% | 2182 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 49,008 psi | 81% | 2392 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,693 psi | 58% | 2198 fps | 95.9% |
| Norma 202 | <<locked>> | 80% | 34,316 psi | 57% | 2215 fps | 98.2% |
| Norma 203B | <<locked>> | 86% | 36,840 psi | 61% | 2293 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 88% | 38,725 psi | 64% | 2346 fps | 95.1% |
| Ramshot TAC | <<locked>> | 90% | 50,212 psi | 83% | 2474 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 37,826 psi | 63% | 2300 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,958 psi | 66% | 2283 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,773 psi | 43% | 1368 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,191 psi | 68% | 2326 fps | 98.8% |
| ReloadSwiss RS 52 | 54.4 gr | 88% | 41,031 psi | 68% | 2431 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 32,430 psi | 54% | 2257 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 38,624 psi | 64% | 2257 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 80% | 33,243 psi | 55% | 2162 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 90% | 36,172 psi | 60% | 2290 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 80% | 49,676 psi | 83% | 2461 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,054 psi | 55% | 2215 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 33,054 psi | 55% | 2182 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,511 psi | 72% | 2336 fps | 97.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 50,879 psi | 85% | 2156 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 45,919 psi | 76% | 2418 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 39,914 psi | 66% | 2375 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 43,685 psi | 73% | 2343 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 47,993 psi | 80% | 2444 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 37,884 psi | 63% | 2290 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,332 psi | 60% | 2175 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,718 psi | 49% | 2057 fps | 97.8% |
| Somchem S321 | <<locked>> | 80% | 39,160 psi | 65% | 2313 fps | 97.4% |
| Somchem S335 | <<locked>> | 80% | 35,752 psi | 59% | 2182 fps | 99% |
| Somchem S341 | <<locked>> | 84% | 38,885 psi | 65% | 2300 fps | 95.4% |
| Somchem S355 | <<locked>> | 88% | 35,244 psi | 59% | 2251 fps | 95.1% |
| Somchem S365 | <<locked>> | 98% | 34,287 psi | 57% | 2306 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 50,401 psi | 84% | 2336 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,075 psi | 68% | 2254 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,143 psi | 60% | 2182 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 31,502 psi | 52% | 2162 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 80% | 32,489 psi | 54% | 2159 fps | 98% |
| Vihtavuori N150 | <<locked>> | 86% | 31,560 psi | 52% | 2156 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 36,680 psi | 61% | 2241 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 80% | 31,183 psi | 52% | 2146 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 39,088 psi | 65% | 2303 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 35,244 psi | 59% | 2270 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 84% | 36,970 psi | 61% | 2293 fps | 95.7% |
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 88 powders for 9.3 x 66 Sako loaded with the .366 | 247gr | Copper Bear . ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,631 fps; across all powders the maximum-charge window runs from 1,499 fps to 2,631 fps. Accurate 4064 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 247.0 gr projectile in 0.366" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, ADI AR 2208, Alliant Reloder- TS 15.5 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon CFE223 rank at the top here: for 9.3 x 66 Sako with the .366 | 247gr | Copper Bear 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.