Load Specifications
Bullet:.375 | 270gr | Swift A-Frame
Bullet Manufacturer:Swift
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:1:6.0
Load data in caliber 9.5 x 66 SE v. Hofe with .375 | 270gr | Swift A-Frame bullet and 102 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 Hodgdon Superformance.
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>> | 84% | 55,143 psi | 86% | 2605 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 57,072 psi | 89% | 2680 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 57,435 psi | 90% | 2677 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,521 psi | 87% | 2697 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,420 psi | 88% | 2684 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,712 psi | 64% | 2536 fps | 96.5% |
| Accurate 4064 | <<locked>> | 92% | 57,203 psi | 90% | 2723 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,116 psi | 90% | 2812 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 88% | 57,638 psi | 90% | 2756 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,114 psi | 86% | 2707 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,594 psi | 89% | 2707 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 57,566 psi | 90% | 2674 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 57,508 psi | 90% | 2881 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,056 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,709 psi | 87% | 2753 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 2815 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,941 psi | 88% | 2851 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,117 psi | 61% | 2569 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,555 psi | 68% | 2723 fps | 98.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 57,580 psi | 90% | 2776 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 55,883 psi | 88% | 2746 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,825 psi | 87% | 2717 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,868 psi | 86% | 2641 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,130 psi | 88% | 2740 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,331 psi | 85% | 2785 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 57,464 psi | 90% | 2697 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,739 psi | 89% | 2759 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 98% | 56,275 psi | 88% | 2812 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 96% | 56,956 psi | 89% | 2772 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 86% | 54,723 psi | 86% | 2720 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,792 psi | 80% | 2694 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 57,740 psi | 90% | 2799 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 57,246 psi | 90% | 2851 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,520 psi | 56% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,028 psi | 88% | 2720 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,824 psi | 86% | 2700 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,766 psi | 86% | 2694 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,795 psi | 86% | 2674 fps | 98.3% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,130 psi | 88% | 2746 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 96% | 57,725 psi | 90% | 2749 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,940 psi | 85% | 2753 fps | 99.8% |
| IMR 4895 | <<locked>> | 90% | 57,130 psi | 90% | 2779 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,594 psi | 89% | 2707 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 57,014 psi | 89% | 2694 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,595 psi | 90% | 2733 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,159 psi | 90% | 2684 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,476 psi | 85% | 2687 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,043 psi | 89% | 2740 fps | 99.4% |
| Lovex S070 | <<locked>> | 98% | 54,505 psi | 85% | 2726 fps | 98.5% |
| Norma 201 | <<locked>> | 88% | 56,405 psi | 88% | 2703 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,942 psi | 89% | 2700 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,955 psi | 86% | 2740 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 56,884 psi | 89% | 2795 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 43,555 psi | 68% | 2680 fps | 96% |
| Norma URPᴾ | <<locked>> | 100% | 55,941 psi | 88% | 2799 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 55,506 psi | 87% | 2766 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,766 psi | 86% | 2799 fps | 99.1% |
| Ramshot TAC | <<locked>> | 86% | 56,927 psi | 89% | 2730 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,565 psi | 89% | 2746 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,522 psi | 90% | 2710 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 57% | 1680 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,115 psi | 88% | 2687 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,188 psi | 90% | 2743 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,405 psi | 88% | 2818 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,622 psi | 87% | 2848 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,768 psi | 89% | 2835 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,492 psi | 89% | 2864 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 86% | 57,421 psi | 90% | 2680 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,927 psi | 89% | 2700 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,753 psi | 87% | 2740 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,825 psi | 87% | 2717 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,043 psi | 89% | 2740 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,595 psi | 90% | 2733 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,476 psi | 85% | 2687 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,505 psi | 85% | 2726 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 57,334 psi | 90% | 2795 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,347 psi | 87% | 2710 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,130 psi | 88% | 2733 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,650 psi | 86% | 2595 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,723 psi | 86% | 2595 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 57,609 psi | 90% | 2697 fps | 98.6% |
| Somchem S321 | <<locked>> | 82% | 54,288 psi | 85% | 2690 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,217 psi | 90% | 2635 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,042 psi | 86% | 2700 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 55,985 psi | 88% | 2733 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,372 psi | 79% | 2753 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,760 psi | 73% | 2638 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 82% | 54,244 psi | 85% | 2556 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,897 psi | 86% | 2582 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,695 psi | 89% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 57,522 psi | 90% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 57,392 psi | 90% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,969 psi | 86% | 2746 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 86% | 57,217 psi | 90% | 2707 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,593 psi | 87% | 2680 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 2802 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,830 psi | 67% | 2644 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,201 psi | 87% | 2723 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 57,145 psi | 90% | 2753 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,463 psi | 88% | 2815 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,954 psi | 55% | 2579 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,999 psi | 88% | 2740 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% | 48,820 psi | 77% | 2523 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,374 psi | 84% | 2631 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,553 psi | 65% | 2457 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,414 psi | 76% | 2598 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 43,642 psi | 68% | 2480 fps | 95.1% |
| Accurate 3100 | <<locked>> | 98% | 37,985 psi | 60% | 2487 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 39,305 psi | 62% | 2457 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,676 psi | 48% | 2336 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 44,875 psi | 70% | 2562 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 38,189 psi | 60% | 2421 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,934 psi | 74% | 2566 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,398 psi | 74% | 2546 fps | 100% |
| Alliant Power Pro 2000-MR | 72.4 gr | 80% | 40,901 psi | 64% | 2598 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,855 psi | 59% | 2444 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,611 psi | 64% | 2503 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,372 psi | 49% | 2352 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,721 psi | 51% | 2418 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,819 psi | 45% | 2316 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 92% | 33,025 psi | 52% | 2480 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,092 psi | 69% | 2569 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 37,565 psi | 59% | 2448 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 43,555 psi | 68% | 2520 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,733 psi | 76% | 2552 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,919 psi | 72% | 2592 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,749 psi | 80% | 2730 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 53,867 psi | 84% | 2651 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,348 psi | 60% | 2451 fps | 97% |
| Hodgdon H414 | <<locked>> | 88% | 40,466 psi | 63% | 2546 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 90% | 47,210 psi | 74% | 2621 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 45,324 psi | 71% | 2572 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,963 psi | 42% | 2208 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,394 psi | 65% | 2549 fps | 99.7% |
| Hodgdon Superformance | 84.7 gr | 90% | 42,917 psi | 67% | 2615 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,484 psi | 42% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,511 psi | 68% | 2526 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 45,020 psi | 71% | 2562 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,074 psi | 63% | 2451 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,612 psi | 67% | 2474 fps | 95.8% |
| IMR 4350 | <<locked>> | 92% | 43,700 psi | 68% | 2546 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,728 psi | 67% | 2503 fps | 95.7% |
| IMR 4831 | <<locked>> | 84% | 32,039 psi | 50% | 2352 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 41,611 psi | 65% | 2533 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 46,934 psi | 74% | 2566 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 53,287 psi | 84% | 2644 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,150 psi | 69% | 2543 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,962 psi | 70% | 2500 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 40,089 psi | 63% | 2457 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 35,027 psi | 55% | 2356 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 39,987 psi | 63% | 2477 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 44,121 psi | 69% | 2516 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 44,295 psi | 69% | 2520 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,001 psi | 63% | 2490 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 49,719 psi | 78% | 2687 fps | 95.6% |
| Norma MRP | <<locked>> | 98% | 40,741 psi | 64% | 2621 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 31,299 psi | 49% | 2346 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 39,610 psi | 62% | 2507 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 37,144 psi | 58% | 2484 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 46,804 psi | 73% | 2575 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,441 psi | 73% | 2595 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,618 psi | 79% | 2612 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,774 psi | 42% | 1499 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,692 psi | 83% | 2641 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,783 psi | 61% | 2434 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,685 psi | 67% | 2602 fps | 99% |
| ReloadSwiss RS 60 | 71.3 gr | 80% | 34,838 psi | 55% | 2480 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,663 psi | 51% | 2405 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 35,201 psi | 55% | 2467 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 47,979 psi | 75% | 2549 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,945 psi | 66% | 2470 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 35,331 psi | 55% | 2395 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 43,555 psi | 68% | 2520 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,027 psi | 55% | 2356 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,150 psi | 69% | 2543 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,089 psi | 63% | 2457 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 39,987 psi | 63% | 2477 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,172 psi | 57% | 2441 fps | 98.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,237 psi | 71% | 2552 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,352 psi | 68% | 2533 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,310 psi | 71% | 2464 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,724 psi | 59% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,655 psi | 65% | 2451 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 50,821 psi | 80% | 2641 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,063 psi | 71% | 2470 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,904 psi | 70% | 2549 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 36,230 psi | 57% | 2402 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 26,281 psi | 41% | 2247 fps | 96.5% |
| Somchem S385 | <<locked>> | 98% | 43,801 psi | 69% | 2585 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 51,097 psi | 80% | 2516 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,658 psi | 72% | 2457 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,379 psi | 65% | 2448 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,003 psi | 66% | 2461 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,360 psi | 54% | 2339 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 32,590 psi | 51% | 2343 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 47,152 psi | 74% | 2562 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,422 psi | 63% | 2454 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,039 psi | 50% | 2346 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 28,979 psi | 45% | 2336 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,443 psi | 48% | 2274 fps | 96.9% |
| Winchester 748 | <<locked>> | 80% | 46,775 psi | 73% | 2608 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 40,625 psi | 64% | 2549 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,122 psi | 43% | 2333 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,873 psi | 67% | 2536 fps | 99.6% |
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 102 powders for 9.5 x 66 SE v. Hofe loaded with the .375 | 270gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,881 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, Hodgdon Superformance rank at the top here: for 9.5 x 66 SE v. Hofe with the .375 | 270gr | 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.