Load Specifications
Bullet:.366 | 250gr | Barnes X S
Bullet Manufacturer:Barnes
Bullet Weight:250 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:1:16.5
Load data in caliber 9.3 x 64 Brenneke with .366 | 250gr | Barnes X S bullet and 104 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 LEVERevolution.
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>> | 90% | 54,462 psi | 85% | 2569 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,795 psi | 86% | 2661 fps | 99.3% |
| Accurate 2230 | <<locked>> | 82% | 55,724 psi | 87% | 2674 fps | 99.5% |
| Accurate 2460 | <<locked>> | 88% | 56,333 psi | 88% | 2638 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 54,462 psi | 85% | 2625 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 54,143 psi | 85% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 96% | 56,318 psi | 88% | 2618 fps | 95.9% |
| Accurate 4064ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2703 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 43,004 psi | 67% | 2566 fps | 97.3% |
| Accurate LT-30 | <<locked>> | 84% | 54,737 psi | 86% | 2520 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 55,143 psi | 86% | 2543 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 56,826 psi | 89% | 2703 fps | 99.8% |
| ADI AR 2207 | <<locked>> | 82% | 56,333 psi | 88% | 2536 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 54,433 psi | 85% | 2651 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 84% | 55,129 psi | 86% | 2635 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 56,376 psi | 88% | 2664 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 55,811 psi | 87% | 2638 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 54,317 psi | 85% | 2713 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 56,492 psi | 89% | 2812 fps | 99.6% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 56,811 psi | 89% | 2717 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,433 psi | 85% | 2575 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 54,360 psi | 85% | 2690 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,714 psi | 69% | 2579 fps | 97.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 50,401 psi | 79% | 2723 fps | 99.7% |
| Alliant Reloder-7 | <<locked>> | 82% | 57,159 psi | 90% | 2552 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 57,203 psi | 90% | 2562 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 56,913 psi | 89% | 2723 fps | 99.4% |
| Bofors RP3ᴾ | <<locked>> | 100% | 57,174 psi | 90% | 2730 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 90% | 55,288 psi | 87% | 2605 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,853 psi | 86% | 2690 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 57,029 psi | 89% | 2785 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 88% | 57,305 psi | 90% | 2664 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 54,752 psi | 86% | 2644 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 55,419 psi | 87% | 2694 fps | 98.8% |
| Hodgdon H4198 | <<locked>> | 82% | 56,739 psi | 89% | 2562 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 57,334 psi | 90% | 2713 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,885 psi | 63% | 2474 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 56,014 psi | 88% | 2743 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,229 psi | 54% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 55,477 psi | 87% | 2671 fps | 99.9% |
| IMR 3031 | <<locked>> | 94% | 56,550 psi | 89% | 2697 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 57,406 psi | 90% | 2680 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,027 psi | 86% | 2618 fps | 96.7% |
| IMR 4198 | <<locked>> | 86% | 55,216 psi | 87% | 2539 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 53,722 psi | 84% | 2631 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,481 psi | 65% | 2523 fps | 97% |
| IMR 4895 | <<locked>> | 96% | 55,753 psi | 87% | 2723 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 92% | 56,376 psi | 88% | 2664 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 56,434 psi | 88% | 2651 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 56,405 psi | 88% | 2651 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 55,840 psi | 88% | 2680 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 57,334 psi | 90% | 2638 fps | 99.8% |
| Lovex S062 | <<locked>> | 98% | 56,376 psi | 88% | 2674 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 2569 fps | 96.9% |
| Norma 200 | <<locked>> | 84% | 57,580 psi | 90% | 2589 fps | 100% |
| Norma 201 | <<locked>> | 94% | 55,259 psi | 87% | 2648 fps | 100% |
| Norma 202 | <<locked>> | 94% | 55,912 psi | 88% | 2657 fps | 100% |
| Norma 203B | <<locked>> | 98% | 56,811 psi | 89% | 2726 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 43,642 psi | 68% | 2569 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 98% | 57,740 psi | 90% | 2756 fps | 99.8% |
| Ramshot TAC | <<locked>> | 92% | 57,246 psi | 90% | 2680 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,941 psi | 88% | 2697 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 88% | 54,375 psi | 85% | 2621 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,577 psi | 54% | 1604 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 56,130 psi | 88% | 2648 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 56,188 psi | 88% | 2674 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 54,143 psi | 85% | 2753 fps | 99.5% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,940 psi | 85% | 2785 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 43,047 psi | 67% | 2585 fps | 96.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 44,628 psi | 70% | 2605 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 92% | 56,362 psi | 88% | 2635 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 55,796 psi | 87% | 2648 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 53,200 psi | 83% | 2671 fps | 99.8% |
| Shooters World AR Plus | <<locked>> | 82% | 56,434 psi | 88% | 2651 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,820 psi | 77% | 2569 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 94% | 55,840 psi | 88% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 56,376 psi | 88% | 2674 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 56,347 psi | 88% | 2625 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,332 psi | 87% | 2287 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 55,288 psi | 87% | 2644 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 55,376 psi | 87% | 2733 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 55,506 psi | 87% | 2595 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,824 psi | 86% | 2654 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 55,317 psi | 87% | 2677 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,621 psi | 86% | 2556 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 2592 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,998 psi | 85% | 2651 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 56,594 psi | 89% | 2595 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 54,331 psi | 85% | 2648 fps | 99.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,824 psi | 84% | 2667 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,609 psi | 61% | 2516 fps | 99% |
| Vihtavuori N120 | <<locked>> | 82% | 56,173 psi | 88% | 2487 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 54,404 psi | 85% | 2526 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,520 psi | 85% | 2546 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 54,621 psi | 86% | 2615 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 56,492 psi | 89% | 2635 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 52,286 psi | 82% | 2608 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 46,064 psi | 72% | 2569 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 92% | 57,232 psi | 90% | 2667 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 54,520 psi | 85% | 2635 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 45,034 psi | 71% | 2575 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,485 psi | 74% | 2562 fps | 99.3% |
| Winchester 748 | <<locked>> | 92% | 56,130 psi | 88% | 2707 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 54,940 psi | 86% | 2687 fps | 99.9% |
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% | 39,711 psi | 62% | 2359 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,445 psi | 81% | 2612 fps | 98.9% |
| Accurate 2230 | <<locked>> | 80% | 51,808 psi | 81% | 2618 fps | 99.2% |
| Accurate 2460 | <<locked>> | 80% | 42,888 psi | 67% | 2451 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 31,763 psi | 50% | 2270 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 38,276 psi | 60% | 2405 fps | 99.5% |
| Accurate 2700 | <<locked>> | 94% | 52,707 psi | 83% | 2569 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 30,124 psi | 47% | 2254 fps | 98.8% |
| Accurate 4350 | <<locked>> | 96% | 37,289 psi | 58% | 2464 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 48,414 psi | 76% | 2438 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,791 psi | 76% | 2457 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,376 psi | 57% | 2362 fps | 96.7% |
| ADI AR 2207 | <<locked>> | 80% | 52,881 psi | 83% | 2493 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 35,331 psi | 55% | 2320 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 48,138 psi | 75% | 2543 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,450 psi | 60% | 2379 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 80% | 37,318 psi | 58% | 2382 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,411 psi | 70% | 2559 fps | 99% |
| Alliant Power Pro 2000-MR | 60.7 gr | 84% | 37,637 psi | 59% | 2477 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 29,907 psi | 47% | 2241 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,266 psi | 71% | 2451 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 34,621 psi | 54% | 2346 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 94% | 36,492 psi | 57% | 2428 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 86% | 31,647 psi | 50% | 2346 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 53,780 psi | 84% | 2513 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 47,355 psi | 74% | 2438 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 35,404 psi | 55% | 2359 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 28,877 psi | 45% | 2231 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,654 psi | 64% | 2379 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,376 psi | 57% | 2392 fps | 98.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 40,001 psi | 63% | 2510 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 80% | 44,048 psi | 69% | 2480 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,715 psi | 70% | 2500 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 39,682 psi | 62% | 2441 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 53,374 psi | 84% | 2520 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 36,637 psi | 57% | 2372 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 30,937 psi | 48% | 2277 fps | 95% |
| Hodgdon LEVERevolution | 56.7 gr | 80% | 32,793 psi | 51% | 2339 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,454 psi | 40% | 1398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,520 psi | 56% | 2333 fps | 97% |
| IMR 3031 | <<locked>> | 80% | 35,491 psi | 56% | 2379 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 34,751 psi | 54% | 2303 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 48,399 psi | 76% | 2520 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 46,137 psi | 72% | 2418 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 50,401 psi | 79% | 2582 fps | 95.6% |
| IMR 4831 | <<locked>> | 96% | 36,376 psi | 57% | 2421 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 33,083 psi | 52% | 2323 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 38,450 psi | 60% | 2379 fps | 98.4% |
| Lovex D073.4 | <<locked>> | 80% | 52,431 psi | 82% | 2598 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 42,772 psi | 67% | 2454 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 34,505 psi | 54% | 2343 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 37,521 psi | 59% | 2316 fps | 97% |
| Lovex S062 | <<locked>> | 80% | 32,097 psi | 50% | 2260 fps | 96.8% |
| Lovex S065 | <<locked>> | 96% | 43,207 psi | 68% | 2477 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 50,923 psi | 80% | 2507 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,665 psi | 56% | 2326 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 35,766 psi | 56% | 2339 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 31,705 psi | 50% | 2283 fps | 95.1% |
| Norma URP | <<locked>> | 96% | 38,377 psi | 60% | 2467 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 82% | 33,504 psi | 53% | 2343 fps | 95.4% |
| Ramshot TAC | <<locked>> | 82% | 40,959 psi | 64% | 2421 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,449 psi | 59% | 2395 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,800 psi | 66% | 2425 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,483 psi | 40% | 1430 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,323 psi | 68% | 2461 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 46,209 psi | 72% | 2526 fps | 95.5% |
| ReloadSwiss RS 52 | 56 gr | 80% | 33,315 psi | 52% | 2375 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 27,688 psi | 43% | 2244 fps | 95.8% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 37,623 psi | 59% | 2480 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 41,785 psi | 65% | 2549 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 39,088 psi | 61% | 2369 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 33,837 psi | 53% | 2277 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 29,080 psi | 46% | 2228 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 52,431 psi | 82% | 2598 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 96% | 43,207 psi | 68% | 2477 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,505 psi | 54% | 2343 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 32,097 psi | 50% | 2260 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,890 psi | 72% | 2477 fps | 99.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,518 psi | 82% | 2254 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,602 psi | 76% | 2552 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 32,750 psi | 51% | 2329 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,093 psi | 72% | 2467 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 38,638 psi | 61% | 2392 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,027 psi | 55% | 2333 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,521 psi | 59% | 2297 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,632 psi | 48% | 2172 fps | 99.2% |
| Somchem S321 | <<locked>> | 80% | 41,191 psi | 65% | 2451 fps | 99.1% |
| Somchem S335 | <<locked>> | 80% | 36,927 psi | 58% | 2300 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 35,984 psi | 56% | 2346 fps | 96.4% |
| Somchem S355 | <<locked>> | 82% | 30,385 psi | 48% | 2244 fps | 95.2% |
| Somchem S365 | <<locked>> | 90% | 28,065 psi | 44% | 2264 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 52,808 psi | 83% | 2448 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,670 psi | 67% | 2365 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,652 psi | 59% | 2300 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,692 psi | 51% | 2277 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,634 psi | 53% | 2280 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 26,861 psi | 42% | 2139 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 94% | 37,826 psi | 59% | 2418 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 38,261 psi | 60% | 2372 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 32,314 psi | 51% | 2267 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 36,854 psi | 58% | 2421 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 31,792 psi | 50% | 2257 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 37,188 psi | 58% | 2411 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,098 psi | 53% | 2333 fps | 96.7% |
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 104 powders for 9.3 x 64 Brenneke loaded with the .366 | 250gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,812 fps; across all powders the maximum-charge window runs from 1,565 fps to 2,812 fps. Accurate 4064 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.366" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, Accurate 4350, 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 LEVERevolution rank at the top here: for 9.3 x 64 Brenneke with the .366 | 250gr | Barnes X S 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.