Load Specifications
Bullet Manufacturer:North Fork
Bullet Weight:250 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:1:6.0
Load data in caliber 9.5 x 66 SE v. Hofe with .375 | 250gr | NorthFork Bonded Core bullet and 105 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 60 and Alliant Reloder-17.
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% | 55,724 psi | 87% | 2720 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,157 psi | 85% | 2746 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,493 psi | 90% | 2785 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,086 psi | 88% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 57,203 psi | 90% | 2789 fps | 97.1% |
| Accurate 4064 | <<locked>> | 94% | 57,334 psi | 90% | 2835 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 2864 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 88% | 54,752 psi | 86% | 2818 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 55,738 psi | 87% | 2818 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,334 psi | 90% | 2822 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,346 psi | 85% | 2749 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,666 psi | 87% | 2877 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,157 psi | 85% | 2933 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,405 psi | 87% | 2838 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,259 psi | 87% | 2723 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,115 psi | 88% | 2861 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,474 psi | 81% | 2864 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,115 psi | 88% | 2959 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,666 psi | 57% | 2602 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,683 psi | 64% | 2749 fps | 96.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,188 psi | 90% | 2703 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,433 psi | 85% | 2831 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 56,043 psi | 88% | 2854 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,376 psi | 88% | 2822 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,811 psi | 87% | 2756 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,623 psi | 89% | 2854 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,897 psi | 86% | 2897 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 54,462 psi | 85% | 2766 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,579 psi | 87% | 2792 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,348 psi | 90% | 2867 fps | 99.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2913 fps | 98% |
| Hodgdon H4350 | <<locked>> | 98% | 57,464 psi | 90% | 2877 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 88% | 55,259 psi | 87% | 2831 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,718 psi | 75% | 2746 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,331 psi | 85% | 2861 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 57,711 psi | 90% | 2953 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,302 psi | 55% | 1703 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,637 psi | 89% | 2835 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,056 psi | 86% | 2812 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,201 psi | 87% | 2802 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,564 psi | 87% | 2782 fps | 97.7% |
| IMR 4198 | <<locked>> | 82% | 55,506 psi | 87% | 2684 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,939 psi | 83% | 2792 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,998 psi | 86% | 2805 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,401 psi | 79% | 2802 fps | 99.2% |
| IMR 4895 | <<locked>> | 92% | 57,537 psi | 90% | 2890 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 57,334 psi | 90% | 2822 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,969 psi | 85% | 2759 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,288 psi | 85% | 2795 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,607 psi | 86% | 2749 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 54,940 psi | 86% | 2799 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 2844 fps | 99% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 2825 fps | 97.8% |
| Norma 201 | <<locked>> | 90% | 56,826 psi | 89% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,551 psi | 90% | 2815 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,274 psi | 87% | 2848 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 52,402 psi | 82% | 2851 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 92% | 55,796 psi | 87% | 2871 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,314 psi | 80% | 2841 fps | 97.9% |
| Ramshot TAC | <<locked>> | 86% | 54,128 psi | 85% | 2789 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,406 psi | 90% | 2861 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,810 psi | 86% | 2772 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,621 psi | 56% | 1742 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,913 psi | 89% | 2802 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,128 psi | 85% | 2799 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,579 psi | 89% | 2927 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,898 psi | 88% | 2959 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,736 psi | 83% | 2881 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,055 psi | 83% | 2910 fps | 99% |
| Rottweil R 901 | <<locked>> | 86% | 54,520 psi | 85% | 2749 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,319 psi | 90% | 2808 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,695 psi | 87% | 2841 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,376 psi | 88% | 2822 fps | 97.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,464 psi | 90% | 2844 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,288 psi | 85% | 2795 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,940 psi | 86% | 2799 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 2825 fps | 97.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,681 psi | 89% | 2776 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,696 psi | 90% | 2907 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,318 psi | 88% | 2746 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,217 psi | 88% | 2822 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,623 psi | 89% | 2841 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,201 psi | 87% | 2707 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,332 psi | 87% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,491 psi | 85% | 2746 fps | 97.5% |
| Somchem S321 | <<locked>> | 84% | 54,969 psi | 86% | 2805 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,578 psi | 86% | 2707 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,564 psi | 87% | 2808 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 56,333 psi | 88% | 2844 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,905 psi | 74% | 2802 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,071 psi | 86% | 2671 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,332 psi | 87% | 2690 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,985 psi | 89% | 2772 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,505 psi | 85% | 2749 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,143 psi | 85% | 2772 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,216 psi | 87% | 2848 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 86% | 54,389 psi | 85% | 2772 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,043 psi | 88% | 2792 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 2854 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,566 psi | 62% | 2677 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,796 psi | 87% | 2828 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 57,725 psi | 90% | 2867 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2917 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,721 psi | 51% | 2582 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,536 psi | 89% | 2851 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% | 46,311 psi | 73% | 2589 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,647 psi | 79% | 2697 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,943 psi | 61% | 2513 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,716 psi | 72% | 2661 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,108 psi | 74% | 2628 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 36,840 psi | 58% | 2507 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,085 psi | 55% | 2533 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 42,641 psi | 67% | 2615 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,274 psi | 57% | 2467 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,657 psi | 70% | 2625 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 44,628 psi | 70% | 2615 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,156 psi | 82% | 2825 fps | 100% |
| Alliant Power Pro 2000-MR | 72.7 gr | 80% | 38,464 psi | 60% | 2635 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,752 psi | 56% | 2490 fps | 98.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,054 psi | 82% | 2680 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,435 psi | 60% | 2552 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,533 psi | 53% | 2493 fps | 95% |
| Alliant Reloder-17 | 71.6 gr | 80% | 30,748 psi | 48% | 2448 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,574 psi | 48% | 2444 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,869 psi | 59% | 2684 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,795 psi | 84% | 2657 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,698 psi | 65% | 2615 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 35,172 psi | 55% | 2490 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 46,833 psi | 73% | 2667 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,398 psi | 73% | 2615 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,207 psi | 68% | 2644 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,529 psi | 74% | 2782 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 51,024 psi | 80% | 2717 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,040 psi | 82% | 2743 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,187 psi | 57% | 2493 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 43,337 psi | 68% | 2694 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 94% | 50,502 psi | 79% | 2769 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 43,004 psi | 67% | 2628 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,647 psi | 48% | 2392 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,827 psi | 61% | 2595 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 46,688 psi | 73% | 2769 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 41% | 1519 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,336 psi | 65% | 2582 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 42,438 psi | 67% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,058 psi | 60% | 2500 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,021 psi | 72% | 2625 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 52,214 psi | 82% | 2638 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,760 psi | 73% | 2690 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,774 psi | 72% | 2651 fps | 95.6% |
| IMR 4831 | <<locked>> | 88% | 34,026 psi | 53% | 2490 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,334 psi | 62% | 2582 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 44,657 psi | 70% | 2625 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 50,517 psi | 79% | 2707 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,568 psi | 65% | 2598 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,815 psi | 67% | 2556 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 37,855 psi | 59% | 2507 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 39,856 psi | 62% | 2546 fps | 95.6% |
| Lovex S070 | <<locked>> | 92% | 42,772 psi | 67% | 2625 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,756 psi | 65% | 2569 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 42,018 psi | 66% | 2582 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,797 psi | 59% | 2539 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 35,578 psi | 56% | 2536 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 37,130 psi | 58% | 2549 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 39,711 psi | 62% | 2625 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 44,498 psi | 70% | 2625 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,976 psi | 69% | 2648 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,254 psi | 76% | 2671 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 42% | 1558 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,980 psi | 78% | 2703 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,814 psi | 66% | 2585 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,972 psi | 63% | 2648 fps | 97.9% |
| ReloadSwiss RS 60 | 71.6 gr | 80% | 32,764 psi | 51% | 2516 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,983 psi | 55% | 2549 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,840 psi | 59% | 2612 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 45,730 psi | 72% | 2615 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,697 psi | 62% | 2523 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 33,083 psi | 52% | 2434 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 46,833 psi | 73% | 2667 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,856 psi | 62% | 2546 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,568 psi | 65% | 2598 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,855 psi | 59% | 2507 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 42,772 psi | 67% | 2625 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,823 psi | 83% | 2723 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,069 psi | 53% | 2484 fps | 96.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,953 psi | 83% | 2700 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,830 psi | 67% | 2602 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,104 psi | 64% | 2582 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,265 psi | 68% | 2530 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,853 psi | 56% | 2398 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,730 psi | 70% | 2595 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 48,225 psi | 76% | 2703 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,815 psi | 67% | 2530 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,482 psi | 67% | 2602 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 34,069 psi | 53% | 2444 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 26,266 psi | 41% | 2323 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 48,878 psi | 77% | 2589 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,526 psi | 68% | 2523 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,088 psi | 61% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,668 psi | 62% | 2516 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,285 psi | 51% | 2382 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 34,925 psi | 55% | 2484 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 44,628 psi | 70% | 2618 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,276 psi | 60% | 2507 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 36,521 psi | 57% | 2536 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 32,619 psi | 51% | 2520 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,863 psi | 45% | 2303 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 44,164 psi | 69% | 2664 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 43,482 psi | 68% | 2697 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,748 psi | 48% | 2520 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,466 psi | 63% | 2589 fps | 98.9% |
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 105 powders for 9.5 x 66 SE v. Hofe loaded with the .375 | 250gr | NorthFork Bonded Core. Alliant Reloder-17 delivers the highest muzzle velocity at 2,959 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,959 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:6.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 9.5 x 66 SE v. Hofe with the .375 | 250gr | NorthFork Bonded Core 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.