Load Specifications
Load data in caliber 9.3 x 66 Sako with .366 | 286gr | North Fork Cup Point Solid bullet and 95 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, Hodgdon CFE223 and ReloadSwiss RS 52.
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% | 54,302 psi | 90% | 2270 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 51,750 psi | 86% | 2306 fps | 98.6% |
| Accurate 2230 | <<locked>> | 82% | 51,996 psi | 86% | 2316 fps | 98.9% |
| Accurate 2460 | <<locked>> | 88% | 52,678 psi | 88% | 2293 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 53,766 psi | 89% | 2320 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 51,561 psi | 86% | 2329 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 53,243 psi | 88% | 2352 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 52,112 psi | 87% | 2192 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 52,547 psi | 87% | 2211 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 53,084 psi | 88% | 2346 fps | 99.3% |
| ADI AR 2207 | <<locked>> | 82% | 53,142 psi | 88% | 2205 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 53,969 psi | 90% | 2336 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 84% | 51,547 psi | 86% | 2290 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 52,750 psi | 88% | 2310 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 92% | 51,416 psi | 85% | 2293 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 54,027 psi | 90% | 2395 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 52,214 psi | 87% | 2428 fps | 98.7% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 52,504 psi | 87% | 2352 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 88% | 54,346 psi | 90% | 2277 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 53,664 psi | 89% | 2372 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 40,915 psi | 68% | 2224 fps | 95.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 46,557 psi | 77% | 2352 fps | 98.9% |
| Alliant Reloder-7 | <<locked>> | 82% | 54,230 psi | 90% | 2221 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 53,998 psi | 90% | 2234 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 52,417 psi | 87% | 2356 fps | 98.5% |
| Bofors RP3ᴾ | <<locked>> | 100% | 52,591 psi | 87% | 2365 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 51,996 psi | 86% | 2260 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 94% | 54,375 psi | 90% | 2379 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 52,634 psi | 87% | 2411 fps | 99% |
| Hodgdon H322 | <<locked>> | 90% | 52,504 psi | 87% | 2303 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 54,201 psi | 90% | 2336 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 51,271 psi | 85% | 2333 fps | 97.7% |
| Hodgdon H4198 | <<locked>> | 84% | 53,911 psi | 90% | 2228 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 53,548 psi | 89% | 2356 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 37,072 psi | 62% | 2133 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 51,358 psi | 85% | 2375 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,272 psi | 57% | 1358 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 53,505 psi | 89% | 2336 fps | 99.6% |
| IMR 3031 | <<locked>> | 98% | 53,563 psi | 89% | 2359 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 52,243 psi | 87% | 2306 fps | 98.9% |
| IMR 4198 | <<locked>> | 86% | 52,228 psi | 87% | 2208 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 51,634 psi | 86% | 2359 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 92% | 52,750 psi | 88% | 2310 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 82% | 52,750 psi | 88% | 2300 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 52,591 psi | 87% | 2300 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 51,561 psi | 86% | 2329 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 54,012 psi | 90% | 2287 fps | 99.4% |
| Lovex S062 | <<locked>> | 98% | 52,475 psi | 87% | 2320 fps | 99.8% |
| Norma 200 | <<locked>> | 82% | 51,329 psi | 85% | 2218 fps | 100% |
| Norma 201 | <<locked>> | 94% | 52,025 psi | 86% | 2303 fps | 99.8% |
| Norma 202 | <<locked>> | 94% | 51,938 psi | 86% | 2306 fps | 100% |
| Norma 203B | <<locked>> | 98% | 52,692 psi | 88% | 2362 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 98% | 52,982 psi | 88% | 2382 fps | 99.2% |
| Ramshot TAC | <<locked>> | 92% | 53,171 psi | 88% | 2320 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 92% | 52,069 psi | 87% | 2339 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 90% | 54,215 psi | 90% | 2313 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,330 psi | 57% | 1391 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 52,562 psi | 87% | 2300 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 52,272 psi | 87% | 2316 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 53,011 psi | 88% | 2425 fps | 99.1% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 49,792 psi | 83% | 2411 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 52,997 psi | 88% | 2290 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 52,185 psi | 87% | 2297 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 48,849 psi | 81% | 2310 fps | 99.3% |
| Shooters World AR Plus | <<locked>> | 82% | 52,750 psi | 88% | 2300 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 94% | 51,561 psi | 86% | 2329 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 52,475 psi | 87% | 2320 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 52,881 psi | 88% | 2277 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 53,388 psi | 89% | 1991 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 51,750 psi | 86% | 2300 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 50,981 psi | 85% | 2365 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 52,243 psi | 87% | 2257 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 50,995 psi | 85% | 2297 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 51,488 psi | 86% | 2323 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 51,314 psi | 85% | 2221 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 53,548 psi | 89% | 2254 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 53,867 psi | 89% | 2346 fps | 99.9% |
| Somchem S335 | <<locked>> | 94% | 53,403 psi | 89% | 2260 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 53,693 psi | 89% | 2336 fps | 99.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 49,937 psi | 83% | 2313 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,795 psi | 59% | 2172 fps | 97.9% |
| Unknown powderᴾ | <<locked>> | 100% | 44,498 psi | 74% | 2270 fps | 96% |
| Vihtavuori N120 | <<locked>> | 82% | 53,098 psi | 88% | 2162 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 51,300 psi | 85% | 2198 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 54,331 psi | 90% | 2247 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 54,128 psi | 90% | 2310 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 52,388 psi | 87% | 2290 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 48,211 psi | 80% | 2260 fps | 99.7% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 42,627 psi | 71% | 2218 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 92% | 53,113 psi | 88% | 2310 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 98% | 53,998 psi | 90% | 2329 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 41,365 psi | 69% | 2221 fps | 95.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 44,063 psi | 73% | 2215 fps | 98.3% |
| Winchester 748 | <<locked>> | 90% | 52,808 psi | 88% | 2362 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,779 psi | 88% | 2356 fps | 99.6% |
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% | 37,681 psi | 63% | 2051 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 48,225 psi | 80% | 2257 fps | 98.1% |
| Accurate 2230 | <<locked>> | 80% | 48,472 psi | 81% | 2267 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 40,509 psi | 67% | 2129 fps | 99.7% |
| Accurate 2495 | <<locked>> | 80% | 29,979 psi | 50% | 1972 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 34,374 psi | 57% | 2070 fps | 98.6% |
| Accurate 4064 | <<locked>> | 80% | 28,369 psi | 47% | 1955 fps | 98.1% |
| Accurate LT-30 | <<locked>> | 80% | 45,977 psi | 76% | 2116 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 46,354 psi | 77% | 2129 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 34,476 psi | 57% | 2047 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 50,111 psi | 83% | 2172 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 35,418 psi | 59% | 2051 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 45,063 psi | 75% | 2208 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,419 psi | 61% | 2064 fps | 97.5% |
| Alliant AR-Comp | <<locked>> | 80% | 34,664 psi | 58% | 2067 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 41,713 psi | 69% | 2218 fps | 98.3% |
| Alliant Power Pro 2000-MR | 50.5 gr | 86% | 37,710 psi | 63% | 2185 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 29,849 psi | 50% | 1978 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 42,801 psi | 71% | 2133 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 34,679 psi | 58% | 2073 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 98% | 38,508 psi | 64% | 2182 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 90% | 33,721 psi | 56% | 2116 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 50,966 psi | 85% | 2185 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 44,614 psi | 74% | 2116 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 37,869 psi | 63% | 2129 fps | 95.3% |
| Bofors RP3 | <<locked>> | 84% | 31,038 psi | 52% | 2021 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,638 psi | 64% | 2064 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,852 psi | 56% | 2067 fps | 97.5% |
| Hodgdon CFE223 | 48 gr | 80% | 37,318 psi | 62% | 2165 fps | 95.9% |
| Hodgdon H322 | <<locked>> | 80% | 38,377 psi | 64% | 2106 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 44,208 psi | 73% | 2205 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 39,552 psi | 66% | 2156 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 80% | 47,790 psi | 79% | 2152 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 34,664 psi | 58% | 2057 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 32,895 psi | 55% | 2051 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 31,096 psi | 52% | 2028 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,237 psi | 42% | 1207 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 33,025 psi | 55% | 2011 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 30,516 psi | 51% | 2008 fps | 99.5% |
| IMR 4064 | <<locked>> | 86% | 34,447 psi | 57% | 2028 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 43,758 psi | 73% | 2103 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 33,272 psi | 55% | 2057 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 36,419 psi | 61% | 2064 fps | 97.5% |
| Lovex D073.4 | <<locked>> | 80% | 49,139 psi | 82% | 2254 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 40,205 psi | 67% | 2129 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 80% | 32,227 psi | 54% | 2031 fps | 98.1% |
| Lovex S060 | <<locked>> | 80% | 35,694 psi | 59% | 2008 fps | 96% |
| Lovex S062 | <<locked>> | 80% | 30,385 psi | 50% | 1959 fps | 95.8% |
| Norma 200 | <<locked>> | 80% | 48,211 psi | 80% | 2182 fps | 100% |
| Norma 201 | <<locked>> | 80% | 33,794 psi | 56% | 2014 fps | 96.9% |
| Norma 202 | <<locked>> | 80% | 33,736 psi | 56% | 2031 fps | 99% |
| Norma 203B | <<locked>> | 84% | 34,011 psi | 57% | 2064 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 86% | 35,882 psi | 60% | 2116 fps | 95.7% |
| Ramshot TAC | <<locked>> | 86% | 43,961 psi | 73% | 2188 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,027 psi | 58% | 2070 fps | 95.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,363 psi | 65% | 2096 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,411 psi | 42% | 1240 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,741 psi | 68% | 2133 fps | 99.4% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 48,892 psi | 81% | 2270 fps | 95.5% |
| ReloadSwiss RS 52 | 47.8 gr | 84% | 35,665 psi | 59% | 2146 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 27,992 psi | 47% | 1985 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 37,478 psi | 62% | 2060 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 32,198 psi | 53% | 1975 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 86% | 31,154 psi | 52% | 2018 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 49,139 psi | 82% | 2254 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,227 psi | 54% | 2031 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 30,385 psi | 50% | 1959 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,004 psi | 71% | 2142 fps | 98.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 50,734 psi | 84% | 1965 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 45,498 psi | 76% | 2215 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 35,012 psi | 58% | 2103 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 43,453 psi | 72% | 2142 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 41,495 psi | 69% | 2159 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 32,982 psi | 55% | 2021 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,679 psi | 59% | 1995 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,022 psi | 48% | 1883 fps | 98.6% |
| Somchem S321 | <<locked>> | 80% | 38,551 psi | 64% | 2123 fps | 98.3% |
| Somchem S335 | <<locked>> | 80% | 34,998 psi | 58% | 1998 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 33,620 psi | 56% | 2028 fps | 95.1% |
| Somchem S355 | <<locked>> | 86% | 32,343 psi | 54% | 2024 fps | 95.5% |
| Somchem S365 | <<locked>> | 94% | 29,820 psi | 50% | 2041 fps | 95.5% |
| Unknown powder | <<locked>> | 98% | 41,785 psi | 69% | 2224 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 50,082 psi | 83% | 2129 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 40,567 psi | 67% | 2057 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,650 psi | 59% | 1998 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 30,763 psi | 51% | 1975 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 31,778 psi | 53% | 1978 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 27,195 psi | 45% | 1896 fps | 95% |
| Vihtavuori N160 | <<locked>> | 98% | 40,001 psi | 66% | 2175 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 35,984 psi | 60% | 2054 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 80% | 30,400 psi | 51% | 1965 fps | 98% |
| Vihtavuori N550 | <<locked>> | 98% | 38,870 psi | 65% | 2178 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 33,968 psi | 56% | 2034 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 37,391 psi | 62% | 2136 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,711 psi | 66% | 2165 fps | 97.8% |
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 118 powders for 9.3 x 66 Sako loaded with the .366 | 286gr | North Fork Cup Point Solid. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,428 fps; across all powders the maximum-charge window runs from 1,358 fps to 2,428 fps. Accurate 2700 gives the best case fill at 100 %, and 118 of the 118 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 48–90 %, 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. Accurate 2700, Accurate 4064, Accurate 4350 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, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for 9.3 x 66 Sako 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, Accurate 2700, Alliant Reloder-23, Bofors RP7 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.