Load Specifications
Bullet:.366 | 250gr | Atomic 29 HP
Bullet Manufacturer:Atomic 29
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:1:16.0
Load data in caliber 9.3 x 64 Brenneke with .366 | 250gr | Atomic 29 HP 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, 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.
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>> | 92% | 57,290 psi | 90% | 2598 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,375 psi | 85% | 2648 fps | 99.2% |
| Accurate 2230 | <<locked>> | 82% | 55,114 psi | 86% | 2661 fps | 99.5% |
| Accurate 2460 | <<locked>> | 88% | 55,738 psi | 87% | 2628 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 57,261 psi | 90% | 2651 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 55,361 psi | 87% | 2671 fps | 100% |
| Accurate 2700ᴾ | <<locked>> | 100% | 56,608 psi | 89% | 2605 fps | 95.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 2690 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,308 psi | 66% | 2549 fps | 97% |
| Accurate LT-30 | <<locked>> | 84% | 54,346 psi | 85% | 2510 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,752 psi | 86% | 2533 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 56,289 psi | 88% | 2690 fps | 99.8% |
| ADI AR 2207 | <<locked>> | 82% | 55,506 psi | 87% | 2523 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 57,130 psi | 90% | 2680 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 84% | 54,491 psi | 85% | 2621 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,622 psi | 87% | 2648 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 55,114 psi | 86% | 2625 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 57,406 psi | 90% | 2749 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 55,869 psi | 88% | 2795 fps | 99.5% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 2700 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 57,203 psi | 90% | 2605 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 57,058 psi | 89% | 2723 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,134 psi | 68% | 2562 fps | 97.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,821 psi | 78% | 2710 fps | 99.6% |
| Alliant Reloder-7 | <<locked>> | 82% | 56,420 psi | 88% | 2539 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 56,753 psi | 89% | 2552 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 56,246 psi | 88% | 2707 fps | 99.3% |
| Bofors RP3ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 2713 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 90% | 54,781 psi | 86% | 2592 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,099 psi | 85% | 2677 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 56,217 psi | 88% | 2766 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 90% | 55,593 psi | 87% | 2635 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 57,624 psi | 90% | 2674 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 54,723 psi | 86% | 2680 fps | 98.6% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,387 psi | 81% | 2684 fps | 96.1% |
| Hodgdon H4198 | <<locked>> | 84% | 56,043 psi | 88% | 2549 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 56,826 psi | 89% | 2700 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,305 psi | 62% | 2454 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 55,042 psi | 86% | 2726 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,316 psi | 54% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 56,826 psi | 89% | 2684 fps | 99.9% |
| IMR 3031 | <<locked>> | 98% | 57,305 psi | 90% | 2700 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 2651 fps | 99.5% |
| IMR 4166 Enduronᴾ | <<locked>> | 100% | 55,637 psi | 87% | 2621 fps | 96.7% |
| IMR 4198 | <<locked>> | 86% | 54,752 psi | 86% | 2530 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 53,098 psi | 83% | 2615 fps | 96.1% |
| IMR 4895 | <<locked>> | 96% | 54,955 psi | 86% | 2703 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 92% | 55,622 psi | 87% | 2648 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 55,796 psi | 87% | 2638 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 55,637 psi | 87% | 2635 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 55,085 psi | 86% | 2667 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 56,869 psi | 89% | 2625 fps | 99.8% |
| Lovex S062 | <<locked>> | 98% | 55,840 psi | 88% | 2664 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,167 psi | 75% | 2556 fps | 96.7% |
| Norma 200 | <<locked>> | 84% | 56,884 psi | 89% | 2575 fps | 100% |
| Norma 201 | <<locked>> | 94% | 54,737 psi | 86% | 2638 fps | 100% |
| Norma 202 | <<locked>> | 94% | 55,085 psi | 86% | 2641 fps | 100% |
| Norma 203B | <<locked>> | 98% | 56,057 psi | 88% | 2710 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 43,033 psi | 67% | 2552 fps | 97% |
| Ramshot Big Game | <<locked>> | 98% | 56,811 psi | 89% | 2736 fps | 99.7% |
| Ramshot TAC | <<locked>> | 92% | 56,608 psi | 89% | 2667 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,463 psi | 87% | 2687 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 90% | 57,450 psi | 90% | 2657 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,461 psi | 54% | 1598 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,593 psi | 87% | 2638 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 55,579 psi | 87% | 2661 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 57,217 psi | 90% | 2789 fps | 99.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 2769 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,525 psi | 67% | 2572 fps | 96.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 44,179 psi | 69% | 2592 fps | 96% |
| Rottweil R 901 | <<locked>> | 92% | 55,477 psi | 87% | 2618 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,984 psi | 86% | 2631 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,446 psi | 82% | 2654 fps | 99.8% |
| Shooters World AR Plus | <<locked>> | 82% | 55,796 psi | 87% | 2638 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,167 psi | 75% | 2556 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 94% | 55,085 psi | 86% | 2667 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 55,840 psi | 88% | 2664 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 55,825 psi | 87% | 2612 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,042 psi | 86% | 2277 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,737 psi | 86% | 2631 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 2717 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 55,071 psi | 86% | 2585 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,128 psi | 85% | 2638 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 54,607 psi | 86% | 2664 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 57,276 psi | 90% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 2579 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 57,174 psi | 90% | 2687 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 56,057 psi | 88% | 2582 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 57,595 psi | 90% | 2687 fps | 99.8% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,156 psi | 83% | 2654 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,014 psi | 60% | 2500 fps | 98.8% |
| Unknown powderᴾ | <<locked>> | 100% | 47,456 psi | 74% | 2612 fps | 97.3% |
| Vihtavuori N120 | <<locked>> | 82% | 55,419 psi | 87% | 2474 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 57,188 psi | 90% | 2556 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 57,145 psi | 90% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 57,609 psi | 90% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 55,753 psi | 87% | 2621 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,590 psi | 81% | 2595 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,455 psi | 71% | 2552 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 92% | 56,391 psi | 88% | 2651 fps | 100% |
| Vihtavuori N540 | <<locked>> | 98% | 57,464 psi | 90% | 2667 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,179 psi | 69% | 2556 fps | 97% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,833 psi | 73% | 2546 fps | 99.2% |
| Winchester 748 | <<locked>> | 90% | 56,420 psi | 88% | 2707 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,387 psi | 81% | 2684 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,594 psi | 89% | 2703 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% | 39,276 psi | 62% | 2346 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,778 psi | 80% | 2595 fps | 98.8% |
| Accurate 2230 | <<locked>> | 80% | 51,184 psi | 80% | 2605 fps | 99.1% |
| Accurate 2460 | <<locked>> | 80% | 42,511 psi | 67% | 2438 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 31,183 psi | 49% | 2254 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 36,245 psi | 57% | 2375 fps | 99.2% |
| Accurate 2700 | <<locked>> | 98% | 52,895 psi | 83% | 2556 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 29,559 psi | 46% | 2234 fps | 98.6% |
| Accurate 4350 | <<locked>> | 96% | 36,622 psi | 57% | 2444 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 48,037 psi | 75% | 2425 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,414 psi | 76% | 2444 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,042 psi | 56% | 2349 fps | 96.5% |
| ADI AR 2207 | <<locked>> | 80% | 52,359 psi | 82% | 2484 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 34,838 psi | 55% | 2306 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 47,500 psi | 74% | 2530 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,116 psi | 60% | 2365 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 80% | 36,637 psi | 57% | 2369 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,976 psi | 69% | 2546 fps | 98.9% |
| Alliant Power Pro 2000-MR | 59.9 gr | 84% | 37,043 psi | 58% | 2457 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 29,414 psi | 46% | 2224 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,802 psi | 70% | 2441 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 34,113 psi | 53% | 2329 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 96% | 38,203 psi | 60% | 2461 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,286 psi | 52% | 2382 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 53,055 psi | 83% | 2500 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,876 psi | 73% | 2425 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 37,362 psi | 59% | 2395 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 28,514 psi | 45% | 2218 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,292 psi | 63% | 2365 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,868 psi | 56% | 2375 fps | 98.3% |
| Hodgdon CFE223 | 58.4 gr | 80% | 39,494 psi | 62% | 2493 fps | 97% |
| Hodgdon H322 | <<locked>> | 80% | 40,248 psi | 63% | 2411 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,760 psi | 73% | 2526 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 39,030 psi | 61% | 2425 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 98% | 48,008 psi | 75% | 2628 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 80% | 49,719 psi | 78% | 2464 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 36,245 psi | 57% | 2362 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 32,532 psi | 51% | 2310 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 30,530 psi | 48% | 2277 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,440 psi | 40% | 1394 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 32,387 psi | 51% | 2257 fps | 95.8% |
| IMR 3031 | <<locked>> | 80% | 32,024 psi | 50% | 2303 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 34,084 psi | 53% | 2283 fps | 95.3% |
| IMR 4166 Enduron | <<locked>> | 96% | 49,530 psi | 78% | 2530 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 45,847 psi | 72% | 2411 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 49,980 psi | 78% | 2569 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 32,706 psi | 51% | 2310 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 38,116 psi | 60% | 2365 fps | 98.2% |
| Lovex D073.4 | <<locked>> | 80% | 51,808 psi | 81% | 2585 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 42,206 psi | 66% | 2441 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 33,953 psi | 53% | 2326 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 36,999 psi | 58% | 2303 fps | 96.8% |
| Lovex S062 | <<locked>> | 80% | 31,589 psi | 50% | 2244 fps | 96.6% |
| Lovex S065 | <<locked>> | 96% | 42,569 psi | 67% | 2461 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 50,212 psi | 79% | 2493 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,128 psi | 55% | 2306 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 35,215 psi | 55% | 2326 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 33,475 psi | 52% | 2320 fps | 95.7% |
| Norma URP | <<locked>> | 96% | 37,768 psi | 59% | 2451 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 82% | 33,098 psi | 52% | 2326 fps | 95.1% |
| Ramshot TAC | <<locked>> | 84% | 43,424 psi | 68% | 2464 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,956 psi | 58% | 2379 fps | 96.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,307 psi | 65% | 2408 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,469 psi | 40% | 1427 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,757 psi | 67% | 2448 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 45,585 psi | 71% | 2510 fps | 95.3% |
| ReloadSwiss RS 52 | 56.7 gr | 82% | 35,172 psi | 55% | 2415 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 27,340 psi | 43% | 2228 fps | 95.5% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 39,682 psi | 62% | 2516 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 41,147 psi | 64% | 2530 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 38,696 psi | 61% | 2359 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 33,475 psi | 52% | 2264 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 84% | 30,748 psi | 48% | 2267 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 51,808 psi | 81% | 2585 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 96% | 42,569 psi | 67% | 2461 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,953 psi | 53% | 2326 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 31,589 psi | 50% | 2244 fps | 96.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,339 psi | 71% | 2461 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,228 psi | 82% | 2244 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,022 psi | 75% | 2539 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 34,548 psi | 54% | 2365 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,614 psi | 71% | 2457 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 41,046 psi | 64% | 2431 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,548 psi | 54% | 2316 fps | 96% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,130 psi | 58% | 2287 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,255 psi | 47% | 2159 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 40,669 psi | 64% | 2438 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 36,405 psi | 57% | 2287 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 35,520 psi | 56% | 2329 fps | 96.2% |
| Somchem S355 | <<locked>> | 84% | 31,879 psi | 50% | 2274 fps | 95.7% |
| Somchem S365 | <<locked>> | 92% | 29,501 psi | 46% | 2297 fps | 95.9% |
| Unknown powder | <<locked>> | 94% | 39,160 psi | 61% | 2461 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 52,301 psi | 82% | 2434 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,250 psi | 66% | 2356 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,246 psi | 58% | 2290 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,285 psi | 51% | 2264 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,286 psi | 52% | 2267 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 26,571 psi | 42% | 2126 fps | 95% |
| Vihtavuori N160 | <<locked>> | 94% | 37,420 psi | 59% | 2405 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 37,913 psi | 59% | 2359 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 80% | 31,995 psi | 50% | 2254 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 96% | 38,783 psi | 61% | 2457 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 31,372 psi | 49% | 2244 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 39,711 psi | 62% | 2454 fps | 99.3% |
| Winchester 760 | <<locked>> | 98% | 48,008 psi | 75% | 2628 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,250 psi | 66% | 2490 fps | 98.6% |
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 119 powders for 9.3 x 64 Brenneke loaded with the .366 | 250gr | Atomic 29 HP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,795 fps; across all powders the maximum-charge window runs from 1,562 fps to 2,795 fps. Accurate 2700 gives the best case fill at 100 %, and 119 of the 119 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.366" calls for a 1:16.0 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, ReloadSwiss RS 52, Hodgdon CFE223 rank at the top here: for 9.3 x 64 Brenneke with the .366 | 250gr | Atomic 29 HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-23, Hodgdon H4350, Hodgdon Superformance 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.