Load Specifications
Bullet:.375 | 270gr | Atomic 29 HP
Bullet Manufacturer:Atomic 29
Bullet Weight:270 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:9.5 x 66 SE v. Hofe load data
Case Length (l3):2.598"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:106 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:17.0
Load data in caliber 9.5 x 66 SE v. Hofe with .375 | 270gr | Atomic 29 HP bullet and 107 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR 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.
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% | 54,505 psi | 85% | 2585 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,492 psi | 89% | 2657 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,651 psi | 87% | 2648 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,592 psi | 86% | 2671 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,072 psi | 88% | 2654 fps | 97.3% |
| Accurate 4064 | <<locked>> | 94% | 55,579 psi | 87% | 2690 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,576 psi | 81% | 2723 fps | 99.5% |
| Accurate LT-30 | <<locked>> | 82% | 57,000 psi | 89% | 2572 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 57,435 psi | 90% | 2598 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 57,101 psi | 89% | 2733 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 54,665 psi | 86% | 2684 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,289 psi | 88% | 2687 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 56,797 psi | 89% | 2654 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,578 psi | 86% | 2740 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,855 psi | 89% | 2851 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,273 psi | 85% | 2703 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 57,740 psi | 90% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,911 psi | 86% | 2723 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,299 psi | 79% | 2730 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,955 psi | 86% | 2818 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,491 psi | 56% | 2477 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,305 psi | 62% | 2615 fps | 97.1% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,391 psi | 88% | 2572 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 57,072 psi | 89% | 2749 fps | 99.9% |
| Bofors RP3 | <<locked>> | 94% | 54,491 psi | 85% | 2713 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,201 psi | 87% | 2687 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,708 psi | 86% | 2621 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,361 psi | 87% | 2717 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 57,595 psi | 90% | 2812 fps | 100% |
| Hodgdon H322 | <<locked>> | 84% | 57,072 psi | 89% | 2677 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,491 psi | 85% | 2657 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,028 psi | 88% | 2733 fps | 99.6% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,071 psi | 86% | 2776 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 98% | 56,289 psi | 88% | 2740 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 90% | 57,667 psi | 90% | 2743 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,427 psi | 73% | 2612 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,927 psi | 89% | 2772 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 56,521 psi | 89% | 2818 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,070 psi | 55% | 1611 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,637 psi | 87% | 2697 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 57,551 psi | 90% | 2720 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,609 psi | 90% | 2713 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,462 psi | 85% | 2648 fps | 97.9% |
| IMR 4198 | <<locked>> | 82% | 54,694 psi | 86% | 2549 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 51,808 psi | 81% | 2661 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 98% | 57,363 psi | 90% | 2720 fps | 98.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,037 psi | 77% | 2667 fps | 99.3% |
| IMR 4895 | <<locked>> | 92% | 56,376 psi | 88% | 2753 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 56,289 psi | 88% | 2687 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 56,362 psi | 88% | 2671 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 56,608 psi | 89% | 2707 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,855 psi | 89% | 2661 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 57,145 psi | 90% | 2707 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 56,173 psi | 88% | 2710 fps | 99.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,519 psi | 84% | 2694 fps | 98% |
| Norma 201 | <<locked>> | 90% | 55,550 psi | 87% | 2674 fps | 100% |
| Norma 202 | <<locked>> | 90% | 56,217 psi | 88% | 2677 fps | 100% |
| Norma 203B | <<locked>> | 94% | 57,624 psi | 90% | 2759 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 51,271 psi | 80% | 2717 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 92% | 54,621 psi | 86% | 2736 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,256 psi | 79% | 2713 fps | 98.2% |
| Ramshot TAC | <<locked>> | 88% | 56,710 psi | 89% | 2707 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,072 psi | 88% | 2723 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 86% | 57,334 psi | 90% | 2690 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,404 psi | 55% | 1650 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,854 psi | 88% | 2667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,608 psi | 89% | 2717 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,448 psi | 87% | 2789 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,795 psi | 86% | 2818 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 2746 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,851 psi | 81% | 2776 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 88% | 56,507 psi | 89% | 2657 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,130 psi | 88% | 2674 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,360 psi | 85% | 2707 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,201 psi | 87% | 2687 fps | 97.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 56,173 psi | 88% | 2710 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,608 psi | 89% | 2707 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 57,145 psi | 90% | 2707 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,519 psi | 84% | 2694 fps | 98% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,608 psi | 87% | 2641 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 56,405 psi | 88% | 2766 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,347 psi | 87% | 2612 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,766 psi | 86% | 2684 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,608 psi | 87% | 2707 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 57,725 psi | 90% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 57,551 psi | 90% | 2612 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 56,884 psi | 89% | 2664 fps | 98.2% |
| Somchem S321 | <<locked>> | 86% | 57,566 psi | 90% | 2720 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,623 psi | 89% | 2615 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,534 psi | 85% | 2677 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 54,766 psi | 86% | 2703 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,571 psi | 71% | 2667 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 57,319 psi | 90% | 2579 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,520 psi | 85% | 2562 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,666 psi | 87% | 2638 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,826 psi | 89% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,594 psi | 89% | 2684 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,824 psi | 84% | 2710 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 88% | 56,956 psi | 89% | 2687 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,853 psi | 86% | 2657 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2720 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,189 psi | 60% | 2546 fps | 98% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,781 psi | 86% | 2697 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 56,579 psi | 89% | 2730 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 2779 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,575 psi | 49% | 2461 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,303 psi | 87% | 2713 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% | 45,150 psi | 71% | 2457 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,269 psi | 77% | 2562 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,289 psi | 58% | 2382 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,469 psi | 70% | 2526 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 45,992 psi | 72% | 2503 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 35,302 psi | 55% | 2375 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 31,430 psi | 49% | 2352 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 53,679 psi | 84% | 2530 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 54,099 psi | 85% | 2556 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,611 psi | 65% | 2487 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 35,360 psi | 55% | 2346 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,700 psi | 68% | 2497 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 43,497 psi | 68% | 2484 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,053 psi | 80% | 2687 fps | 100% |
| Alliant Power Pro 2000-MR | 68.5 gr | 80% | 37,608 psi | 59% | 2510 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,592 psi | 54% | 2365 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,908 psi | 80% | 2546 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,347 psi | 59% | 2425 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,590 psi | 51% | 2369 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,762 psi | 47% | 2326 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,486 psi | 46% | 2323 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,535 psi | 57% | 2552 fps | 96% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,924 psi | 83% | 2533 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,712 psi | 64% | 2490 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 33,939 psi | 53% | 2365 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 45,542 psi | 71% | 2536 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,600 psi | 71% | 2487 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,148 psi | 66% | 2516 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,557 psi | 73% | 2651 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 50,038 psi | 78% | 2585 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,908 psi | 80% | 2608 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,041 psi | 55% | 2369 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 92% | 42,061 psi | 66% | 2562 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 94% | 49,385 psi | 77% | 2638 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 41,945 psi | 66% | 2500 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 27,818 psi | 44% | 2221 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,768 psi | 59% | 2467 fps | 99% |
| Hodgdon Superformance | <<locked>> | 94% | 45,324 psi | 71% | 2638 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 41% | 1440 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,393 psi | 63% | 2454 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 41,307 psi | 65% | 2493 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,101 psi | 58% | 2379 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,235 psi | 66% | 2448 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 51,416 psi | 81% | 2507 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 45,658 psi | 72% | 2562 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 42,192 psi | 66% | 2474 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 32,793 psi | 51% | 2362 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 38,247 psi | 60% | 2454 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 43,700 psi | 68% | 2497 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 49,153 psi | 77% | 2575 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,161 psi | 63% | 2464 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 41,916 psi | 66% | 2431 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 36,738 psi | 58% | 2382 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 36,347 psi | 57% | 2372 fps | 95% |
| Lovex S070 | <<locked>> | 92% | 41,481 psi | 65% | 2493 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 40,582 psi | 64% | 2441 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 40,828 psi | 64% | 2451 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,738 psi | 58% | 2415 fps | 98% |
| Norma URP | <<locked>> | 86% | 32,242 psi | 51% | 2356 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,201 psi | 57% | 2425 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 38,537 psi | 60% | 2500 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 43,540 psi | 68% | 2500 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,917 psi | 67% | 2520 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,181 psi | 74% | 2543 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,281 psi | 41% | 1473 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,979 psi | 77% | 2572 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,669 psi | 64% | 2457 fps | 95.5% |
| ReloadSwiss RS 52 | 66.4 gr | 80% | 38,943 psi | 61% | 2520 fps | 98.1% |
| ReloadSwiss RS 60 | 67.4 gr | 80% | 31,763 psi | 50% | 2392 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,794 psi | 53% | 2421 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 36,782 psi | 58% | 2487 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 44,382 psi | 70% | 2480 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,609 psi | 61% | 2398 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 31,923 psi | 50% | 2313 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 45,542 psi | 71% | 2536 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 36,347 psi | 57% | 2372 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,161 psi | 63% | 2464 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 36,738 psi | 58% | 2382 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 41,481 psi | 65% | 2493 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,924 psi | 81% | 2592 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,098 psi | 52% | 2362 fps | 96.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,040 psi | 82% | 2569 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,611 psi | 65% | 2474 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,161 psi | 63% | 2461 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,250 psi | 66% | 2402 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,882 psi | 55% | 2277 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 43,555 psi | 68% | 2467 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 47,094 psi | 74% | 2572 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,742 psi | 65% | 2405 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,423 psi | 65% | 2474 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 32,967 psi | 52% | 2323 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 25,193 psi | 39% | 2201 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 47,877 psi | 75% | 2457 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,569 psi | 67% | 2398 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,927 psi | 59% | 2382 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,711 psi | 61% | 2392 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,285 psi | 49% | 2264 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 33,881 psi | 53% | 2362 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 43,685 psi | 68% | 2493 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 37,188 psi | 58% | 2382 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 33,156 psi | 52% | 2362 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 31,241 psi | 49% | 2388 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,934 psi | 44% | 2192 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 43,062 psi | 67% | 2536 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 42,279 psi | 66% | 2566 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,530 psi | 46% | 2395 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,450 psi | 62% | 2464 fps | 99% |
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 107 powders for 9.5 x 66 SE v. Hofe loaded with the .375 | 270gr | Atomic 29 HP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,851 fps; across all powders the maximum-charge window runs from 1,611 fps to 2,851 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 9.5 x 66 SE v. Hofe with the .375 | 270gr | Atomic 29 HP 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.