Load Specifications
Bullet:.366 | 300gr | Swift A-Frame
Bullet Manufacturer:Swift
Bullet Weight:300 gr
Bullet Diameter:0.366"
Bullet Length:<<locked>>
Caliber:9.3 x 64 Brenneke load data
Case Length (l3):2.519"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:88 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:6.0
Load data in caliber 9.3 x 64 Brenneke with .366 | 300gr | Swift A-Frame bullet and 106 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, Alliant Reloder-17 and ReloadSwiss RS 60.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 57,508 psi | 90% | 2362 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,753 psi | 87% | 2392 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,680 psi | 87% | 2385 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,085 psi | 85% | 2408 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,216 psi | 87% | 2402 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,233 psi | 61% | 2274 fps | 96.8% |
| Accurate 4064 | <<locked>> | 92% | 55,666 psi | 87% | 2431 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,201 psi | 87% | 2516 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 56,333 psi | 88% | 2464 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 57,130 psi | 90% | 2461 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,376 psi | 87% | 2418 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,246 psi | 88% | 2388 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 57,522 psi | 90% | 2510 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,825 psi | 87% | 2575 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 57,203 psi | 90% | 2480 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,985 psi | 89% | 2359 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,389 psi | 85% | 2461 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 2520 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,012 psi | 85% | 2549 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,898 psi | 59% | 2303 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,814 psi | 66% | 2441 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,028 psi | 88% | 2484 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 57,740 psi | 90% | 2497 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,462 psi | 85% | 2431 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 57,130 psi | 90% | 2398 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,621 psi | 86% | 2448 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,797 psi | 89% | 2539 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 56,072 psi | 88% | 2402 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 57,261 psi | 90% | 2434 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,187 psi | 86% | 2467 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 98% | 54,375 psi | 85% | 2516 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 96% | 55,332 psi | 87% | 2480 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 88% | 56,869 psi | 89% | 2470 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,182 psi | 77% | 2408 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,028 psi | 88% | 2503 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,158 psi | 86% | 2552 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 56% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,650 psi | 86% | 2431 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 56,971 psi | 89% | 2448 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,826 psi | 89% | 2448 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,971 psi | 89% | 2438 fps | 98.9% |
| IMR 4198 | <<locked>> | 82% | 57,072 psi | 89% | 2320 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 2454 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,289 psi | 88% | 2457 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,011 psi | 82% | 2461 fps | 99.9% |
| IMR 4895 | <<locked>> | 90% | 55,767 psi | 87% | 2487 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,376 psi | 87% | 2418 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,666 psi | 87% | 2405 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 56,173 psi | 88% | 2441 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,057 psi | 88% | 2398 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 56,420 psi | 88% | 2441 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,506 psi | 87% | 2451 fps | 99.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 2484 fps | 99.1% |
| Norma 201 | <<locked>> | 88% | 55,129 psi | 86% | 2415 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,564 psi | 87% | 2411 fps | 100% |
| Norma 203B | <<locked>> | 92% | 57,072 psi | 89% | 2493 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 55,071 psi | 86% | 2500 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 41,989 psi | 66% | 2402 fps | 96.3% |
| Norma URPᴾ | <<locked>> | 100% | 54,114 psi | 85% | 2503 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 92% | 57,624 psi | 90% | 2520 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,924 psi | 83% | 2507 fps | 99.2% |
| Ramshot TAC | <<locked>> | 86% | 55,724 psi | 87% | 2444 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,201 psi | 87% | 2457 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,463 psi | 88% | 2425 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,013 psi | 56% | 1480 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,940 psi | 86% | 2398 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,622 psi | 87% | 2454 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,766 psi | 86% | 2520 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 57,595 psi | 90% | 2592 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 2536 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,404 psi | 85% | 2562 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 86% | 56,217 psi | 88% | 2392 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,651 psi | 87% | 2411 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 57,609 psi | 90% | 2487 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,462 psi | 85% | 2431 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,506 psi | 87% | 2451 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 56,173 psi | 88% | 2441 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,420 psi | 88% | 2441 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 2484 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,637 psi | 87% | 2500 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 57,711 psi | 90% | 2470 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,766 psi | 86% | 2441 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,724 psi | 89% | 2352 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,724 psi | 89% | 2352 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,912 psi | 88% | 2411 fps | 98.8% |
| Somchem S321 | <<locked>> | 84% | 56,768 psi | 89% | 2451 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,043 psi | 88% | 2352 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,203 psi | 90% | 2457 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 54,360 psi | 85% | 2444 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 2461 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 45,252 psi | 71% | 2362 fps | 96.6% |
| Vihtavuori N130 | <<locked>> | 84% | 56,507 psi | 89% | 2316 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,898 psi | 89% | 2336 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,187 psi | 86% | 2372 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,072 psi | 88% | 2392 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,854 psi | 88% | 2425 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,942 psi | 89% | 2500 fps | 100% |
| Vihtavuori N530 | <<locked>> | 86% | 55,970 psi | 88% | 2418 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 57,537 psi | 90% | 2434 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,550 psi | 87% | 2507 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,060 psi | 64% | 2365 fps | 99.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,334 psi | 90% | 2480 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 55,738 psi | 87% | 2461 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,621 psi | 86% | 2520 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,750 psi | 53% | 2310 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,462 psi | 85% | 2448 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 47,790 psi | 75% | 2247 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,301 psi | 82% | 2352 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,437 psi | 63% | 2192 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,268 psi | 74% | 2323 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,525 psi | 67% | 2215 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 34,185 psi | 54% | 2182 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 38,247 psi | 60% | 2192 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 29,820 psi | 47% | 2096 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 43,947 psi | 69% | 2290 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 37,449 psi | 59% | 2165 fps | 98.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,006 psi | 72% | 2290 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 46,238 psi | 72% | 2270 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 53,838 psi | 84% | 2464 fps | 100% |
| Alliant Power Pro 2000-MR | 58.5 gr | 80% | 39,827 psi | 62% | 2326 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,970 psi | 58% | 2185 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 53,679 psi | 84% | 2323 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,711 psi | 62% | 2238 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,661 psi | 48% | 2106 fps | 95.8% |
| Alliant Reloder-17 | 57.6 gr | 80% | 31,850 psi | 50% | 2169 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 26,426 psi | 41% | 2031 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 92% | 31,908 psi | 50% | 2224 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,018 psi | 67% | 2297 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 36,550 psi | 57% | 2188 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 40,147 psi | 63% | 2211 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,863 psi | 75% | 2280 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,686 psi | 70% | 2316 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,385 psi | 77% | 2441 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 80% | 52,779 psi | 83% | 2365 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 53,548 psi | 84% | 2388 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,405 psi | 59% | 2192 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 36,869 psi | 58% | 2234 fps | 95% |
| Hodgdon H4350 | <<locked>> | 88% | 43,163 psi | 68% | 2300 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 44,367 psi | 70% | 2300 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,353 psi | 41% | 1978 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,321 psi | 63% | 2280 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 90% | 41,669 psi | 65% | 2343 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 41% | 1289 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,511 psi | 67% | 2257 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 44,135 psi | 69% | 2287 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,320 psi | 62% | 2192 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,843 psi | 66% | 2211 fps | 96.2% |
| IMR 4198 | <<locked>> | 80% | 53,940 psi | 85% | 2283 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 40,103 psi | 63% | 2234 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 39,291 psi | 62% | 2195 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 29,109 psi | 46% | 2060 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 40,683 psi | 64% | 2264 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 46,006 psi | 72% | 2290 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 51,967 psi | 81% | 2359 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,004 psi | 67% | 2270 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,063 psi | 69% | 2231 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 39,189 psi | 61% | 2195 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 34,316 psi | 54% | 2110 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 36,651 psi | 57% | 2175 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,091 psi | 68% | 2247 fps | 100% |
| Norma 202 | <<locked>> | 80% | 43,366 psi | 68% | 2251 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,102 psi | 61% | 2228 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 45,020 psi | 71% | 2352 fps | 95.1% |
| Norma MRP | <<locked>> | 98% | 39,363 psi | 62% | 2352 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 30,501 psi | 48% | 2100 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 38,508 psi | 60% | 2241 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 36,085 psi | 57% | 2224 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 45,788 psi | 72% | 2303 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,353 psi | 71% | 2323 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,501 psi | 78% | 2333 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,861 psi | 42% | 1322 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,561 psi | 81% | 2356 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,811 psi | 59% | 2178 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,626 psi | 65% | 2326 fps | 99.3% |
| ReloadSwiss RS 60 | 57.6 gr | 80% | 33,881 psi | 53% | 2221 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 29,733 psi | 47% | 2110 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,258 psi | 54% | 2211 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 47,181 psi | 74% | 2274 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,191 psi | 65% | 2208 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 34,418 psi | 54% | 2142 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 40,147 psi | 63% | 2211 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 34,316 psi | 54% | 2110 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,004 psi | 67% | 2270 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,189 psi | 61% | 2195 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 36,651 psi | 57% | 2175 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,288 psi | 55% | 2188 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,063 psi | 69% | 2280 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,424 psi | 66% | 2267 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,469 psi | 70% | 2198 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,956 psi | 58% | 2090 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,000 psi | 60% | 2146 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 49,632 psi | 78% | 2362 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,063 psi | 69% | 2201 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,845 psi | 69% | 2280 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 35,302 psi | 55% | 2146 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 25,585 psi | 40% | 2011 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 39,682 psi | 62% | 2270 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 50,198 psi | 79% | 2241 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,788 psi | 70% | 2188 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,480 psi | 63% | 2185 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,060 psi | 64% | 2195 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,518 psi | 53% | 2093 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 29,820 psi | 47% | 2054 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 46,064 psi | 72% | 2290 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,465 psi | 62% | 2192 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 31,169 psi | 49% | 2100 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 28,007 psi | 44% | 2093 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,718 psi | 47% | 2037 fps | 97.4% |
| Winchester 748 | <<locked>> | 80% | 45,687 psi | 72% | 2329 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 36,869 psi | 58% | 2234 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,281 psi | 41% | 2093 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,800 psi | 66% | 2270 fps | 99.8% |
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 106 powders for 9.3 x 64 Brenneke loaded with the .366 | 300gr | Swift A-Frame. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,592 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,592 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.366" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 9.3 x 64 Brenneke with the .366 | 300gr | Swift A-Frame 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.