Load Specifications
Load data in caliber 9.3 x 66 Sako with .366 | 258gr | RWS Speed Tip Professional 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>> | 92% | 51,329 psi | 85% | 2379 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 52,446 psi | 87% | 2454 fps | 97.9% |
| Accurate 2230 | <<locked>> | 84% | 52,779 psi | 88% | 2464 fps | 98.3% |
| Accurate 2460 | <<locked>> | 90% | 53,113 psi | 88% | 2441 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 53,737 psi | 89% | 2464 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 53,911 psi | 90% | 2487 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 49,806 psi | 83% | 2454 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 52,968 psi | 88% | 2339 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 53,403 psi | 89% | 2356 fps | 100% |
| ADI AR 2206H | <<locked>> | 96% | 53,548 psi | 89% | 2490 fps | 98.8% |
| ADI AR 2207 | <<locked>> | 84% | 53,780 psi | 89% | 2359 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 51,198 psi | 85% | 2434 fps | 97.8% |
| ADI AR 2219 | <<locked>> | 86% | 52,214 psi | 87% | 2441 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 53,098 psi | 88% | 2454 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 94% | 51,561 psi | 86% | 2444 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 54,114 psi | 90% | 2543 fps | 99.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 52,779 psi | 88% | 2569 fps | 97.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 49,429 psi | 82% | 2451 fps | 98.9% |
| Alliant Reloder-10x | <<locked>> | 88% | 51,779 psi | 86% | 2392 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 53,722 psi | 89% | 2510 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 43,859 psi | 73% | 2434 fps | 97.4% |
| Alliant Reloder-7 | <<locked>> | 82% | 51,851 psi | 86% | 2336 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 51,445 psi | 85% | 2339 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 52,910 psi | 88% | 2497 fps | 97.8% |
| Bofors RP3ᴾ | <<locked>> | 100% | 49,342 psi | 82% | 2461 fps | 99% |
| Hodgdon Benchmark | <<locked>> | 92% | 52,721 psi | 88% | 2405 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 94% | 51,082 psi | 85% | 2477 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 92% | 52,982 psi | 88% | 2556 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 90% | 54,012 psi | 90% | 2464 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 51,416 psi | 85% | 2444 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 51,547 psi | 86% | 2467 fps | 96.8% |
| Hodgdon H4198 | <<locked>> | 82% | 51,706 psi | 86% | 2339 fps | 100% |
| Hodgdon H4895 | <<locked>> | 96% | 53,940 psi | 90% | 2500 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 51,851 psi | 86% | 2520 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,852 psi | 56% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 52,286 psi | 87% | 2457 fps | 98.9% |
| IMR 3031 | <<locked>> | 96% | 52,112 psi | 87% | 2490 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 53,925 psi | 90% | 2464 fps | 98.4% |
| IMR 4198 | <<locked>> | 88% | 52,591 psi | 87% | 2356 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 51,750 psi | 86% | 2497 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 94% | 53,098 psi | 88% | 2454 fps | 99.5% |
| Lovex D073.4 | <<locked>> | 84% | 53,519 psi | 89% | 2451 fps | 100% |
| Lovex D073.5 | <<locked>> | 90% | 53,214 psi | 88% | 2448 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 96% | 51,561 psi | 86% | 2467 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 51,517 psi | 86% | 2388 fps | 98.5% |
| Lovex S062ᴾ | <<locked>> | 100% | 52,736 psi | 88% | 2464 fps | 99.5% |
| Norma 200 | <<locked>> | 84% | 51,764 psi | 86% | 2369 fps | 100% |
| Norma 201 | <<locked>> | 96% | 52,301 psi | 87% | 2444 fps | 99.4% |
| Norma 202 | <<locked>> | 96% | 52,373 psi | 87% | 2454 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 52,707 psi | 88% | 2500 fps | 98.7% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 53,534 psi | 89% | 2526 fps | 98.6% |
| Ramshot TAC | <<locked>> | 94% | 54,012 psi | 90% | 2461 fps | 96.5% |
| Ramshot Wild Boar | <<locked>> | 94% | 52,431 psi | 87% | 2480 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 90% | 51,590 psi | 86% | 2415 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,069 psi | 57% | 1480 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 53,113 psi | 88% | 2448 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 53,156 psi | 88% | 2569 fps | 98.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 46,905 psi | 78% | 2500 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 94% | 53,316 psi | 89% | 2434 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 52,402 psi | 87% | 2438 fps | 99.4% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 45,672 psi | 76% | 2402 fps | 98.2% |
| Shooters World AR Plus | <<locked>> | 84% | 53,519 psi | 89% | 2451 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 51,561 psi | 86% | 2467 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 52,736 psi | 88% | 2464 fps | 99.5% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 53,679 psi | 89% | 2421 fps | 99.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 54,259 psi | 90% | 2136 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 52,417 psi | 87% | 2448 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 48,051 psi | 80% | 2457 fps | 97.8% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 52,721 psi | 88% | 2405 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 51,372 psi | 85% | 2434 fps | 96.6% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 51,721 psi | 86% | 2461 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 51,866 psi | 86% | 2362 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 50,604 psi | 84% | 2356 fps | 100% |
| Somchem S321 | <<locked>> | 92% | 54,404 psi | 90% | 2490 fps | 99.7% |
| Somchem S335 | <<locked>> | 96% | 53,722 psi | 89% | 2402 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 54,244 psi | 90% | 2480 fps | 98.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 46,963 psi | 78% | 2408 fps | 98.2% |
| Vihtavuori N120 | <<locked>> | 84% | 53,722 psi | 89% | 2313 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 52,011 psi | 86% | 2349 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 51,474 psi | 86% | 2356 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 53,809 psi | 89% | 2454 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 52,750 psi | 88% | 2434 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 45,208 psi | 75% | 2352 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 94% | 53,766 psi | 89% | 2454 fps | 99.5% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 54,331 psi | 90% | 2474 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 41,785 psi | 69% | 2293 fps | 96.7% |
| Winchester 748 | <<locked>> | 94% | 51,982 psi | 86% | 2493 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 96% | 50,995 psi | 85% | 2467 fps | 98.9% |
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% | 35,563 psi | 59% | 2142 fps | 99.9% |
| Accurate 2200 | <<locked>> | 80% | 45,803 psi | 76% | 2352 fps | 96.7% |
| Accurate 2230 | <<locked>> | 80% | 45,759 psi | 76% | 2359 fps | 97.1% |
| Accurate 2460 | <<locked>> | 80% | 38,072 psi | 63% | 2218 fps | 98.9% |
| Accurate 2495 | <<locked>> | 80% | 27,963 psi | 46% | 2051 fps | 99.1% |
| Accurate 2520 | <<locked>> | 80% | 33,489 psi | 56% | 2165 fps | 97.6% |
| Accurate 4064 | <<locked>> | 80% | 26,527 psi | 44% | 2028 fps | 96.4% |
| Accurate LT-30 | <<locked>> | 80% | 44,208 psi | 73% | 2221 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 44,556 psi | 74% | 2234 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 84% | 36,811 psi | 61% | 2215 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 47,732 psi | 79% | 2283 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 40,074 psi | 67% | 2257 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 42,525 psi | 71% | 2303 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,534 psi | 57% | 2146 fps | 95.9% |
| Alliant AR-Comp | <<locked>> | 80% | 32,692 psi | 54% | 2162 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 39,334 psi | 65% | 2306 fps | 96.8% |
| Alliant Power Pro 2000-MR | 55.8 gr | 92% | 43,381 psi | 72% | 2415 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 33,939 psi | 56% | 2185 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,567 psi | 67% | 2234 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 39,305 psi | 65% | 2287 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 96% | 38,522 psi | 64% | 2333 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 48,805 psi | 81% | 2297 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,496 psi | 71% | 2215 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 40,727 psi | 68% | 2306 fps | 95% |
| Bofors RP3 | <<locked>> | 88% | 33,127 psi | 55% | 2185 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,883 psi | 61% | 2152 fps | 97.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,836 psi | 53% | 2149 fps | 95.8% |
| Hodgdon CFE223 | 52.1 gr | 84% | 40,321 psi | 67% | 2349 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 39,001 psi | 65% | 2247 fps | 99.7% |
| Hodgdon H335 | <<locked>> | 80% | 39,523 psi | 66% | 2264 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 96% | 45,237 psi | 75% | 2375 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 48,646 psi | 81% | 2300 fps | 100% |
| Hodgdon H4895 | <<locked>> | 82% | 34,824 psi | 58% | 2182 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 35,346 psi | 59% | 2238 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,947 psi | 41% | 1283 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 35,969 psi | 60% | 2188 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 31,140 psi | 52% | 2146 fps | 99.1% |
| IMR 4064 | <<locked>> | 90% | 39,581 psi | 66% | 2244 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 41,611 psi | 69% | 2208 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 37,782 psi | 63% | 2270 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 34,534 psi | 57% | 2146 fps | 95.9% |
| Lovex D073.4 | <<locked>> | 80% | 46,427 psi | 77% | 2352 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 37,913 psi | 63% | 2218 fps | 97.9% |
| Lovex D073.6 | <<locked>> | 80% | 30,081 psi | 50% | 2103 fps | 96.5% |
| Lovex S060 | <<locked>> | 84% | 38,189 psi | 63% | 2172 fps | 95.6% |
| Lovex S062 | <<locked>> | 84% | 32,314 psi | 54% | 2119 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 45,832 psi | 76% | 2290 fps | 100% |
| Norma 201 | <<locked>> | 80% | 32,024 psi | 53% | 2096 fps | 95.2% |
| Norma 202 | <<locked>> | 80% | 31,691 psi | 53% | 2110 fps | 97.7% |
| Norma 203B | <<locked>> | 88% | 36,260 psi | 60% | 2231 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 90% | 38,580 psi | 64% | 2287 fps | 95.3% |
| Ramshot TAC | <<locked>> | 90% | 47,558 psi | 79% | 2369 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 37,695 psi | 63% | 2244 fps | 95.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 37,420 psi | 62% | 2182 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,048 psi | 42% | 1316 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,580 psi | 64% | 2224 fps | 98.4% |
| ReloadSwiss RS 52 | 52.9 gr | 90% | 40,799 psi | 68% | 2372 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 32,082 psi | 53% | 2198 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 35,476 psi | 59% | 2149 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 32,271 psi | 54% | 2096 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 92% | 35,201 psi | 58% | 2221 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 80% | 46,427 psi | 77% | 2352 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,081 psi | 50% | 2103 fps | 96.5% |
| Shooters World Precision | <<locked>> | 84% | 32,314 psi | 54% | 2119 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 40,886 psi | 68% | 2234 fps | 97.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 48,878 psi | 81% | 2073 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 43,149 psi | 72% | 2313 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 37,391 psi | 62% | 2270 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 41,162 psi | 68% | 2244 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 44,904 psi | 75% | 2339 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 37,826 psi | 63% | 2234 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,866 psi | 56% | 2080 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,470 psi | 46% | 1962 fps | 97.2% |
| Somchem S321 | <<locked>> | 80% | 36,419 psi | 61% | 2208 fps | 96.9% |
| Somchem S335 | <<locked>> | 80% | 33,272 psi | 55% | 2083 fps | 98.7% |
| Somchem S341 | <<locked>> | 86% | 38,841 psi | 65% | 2247 fps | 95.6% |
| Somchem S355 | <<locked>> | 90% | 34,432 psi | 57% | 2185 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 47,732 psi | 79% | 2241 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 38,566 psi | 64% | 2156 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,765 psi | 56% | 2087 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 80% | 28,805 psi | 48% | 2057 fps | 99.2% |
| Vihtavuori N140 | <<locked>> | 80% | 30,023 psi | 50% | 2060 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 88% | 30,951 psi | 51% | 2093 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 34,040 psi | 57% | 2136 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 28,616 psi | 48% | 2041 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 36,637 psi | 61% | 2198 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 32,851 psi | 55% | 2169 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 84% | 34,345 psi | 57% | 2188 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 88 powders for 9.3 x 66 Sako loaded with the .366 | 258gr | RWS Speed Tip Professional. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,569 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,569 fps. Accurate 2495 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 56–90 %, leaving at least 10 % headroom. The 258.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon CFE223 rank at the top here: for 9.3 x 66 Sako with the .366 | 258gr | RWS Speed Tip Professional 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.