Load Specifications
Bullet:.375 | 300gr | Woodleigh HS
Bullet Manufacturer:Woodleigh
Bullet Weight:300 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 | 300gr | Woodleigh HS 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, Hodgdon Superformance 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>> | 84% | 56,507 psi | 89% | 2461 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,317 psi | 87% | 2490 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,072 psi | 89% | 2552 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,230 psi | 85% | 2503 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,061 psi | 66% | 2421 fps | 97.7% |
| Accurate 4064 | <<locked>> | 90% | 55,405 psi | 87% | 2536 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,911 psi | 86% | 2625 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 55,506 psi | 87% | 2566 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,565 psi | 89% | 2569 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 49,966 psi | 78% | 2556 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,462 psi | 85% | 2516 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,550 psi | 87% | 2487 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,129 psi | 86% | 2680 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,550 psi | 89% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,130 psi | 90% | 2608 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,985 psi | 88% | 2674 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 57,522 psi | 90% | 2707 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 48,776 psi | 76% | 2549 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,205 psi | 63% | 2451 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 35,520 psi | 56% | 2362 fps | 96.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,831 psi | 70% | 2602 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,376 psi | 87% | 2585 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 57,276 psi | 90% | 2602 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,188 psi | 90% | 2582 fps | 98.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,188 psi | 88% | 2500 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,537 psi | 90% | 2595 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,811 psi | 87% | 2641 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,650 psi | 86% | 2572 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 96% | 54,099 psi | 85% | 2625 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 94% | 54,781 psi | 86% | 2589 fps | 98% |
| Hodgdon H4895 | <<locked>> | 86% | 56,086 psi | 88% | 2575 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,330 psi | 82% | 2559 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,637 psi | 87% | 2608 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,665 psi | 86% | 2661 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,766 psi | 56% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 57,334 psi | 90% | 2575 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,275 psi | 88% | 2549 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,043 psi | 88% | 2552 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,927 psi | 88% | 2539 fps | 99% |
| IMR 4350ᴾ | <<locked>> | 100% | 57,493 psi | 90% | 2608 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,608 psi | 87% | 2562 fps | 98.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,376 psi | 87% | 2615 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 55,056 psi | 86% | 2589 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 54,462 psi | 85% | 2516 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,361 psi | 87% | 2543 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,143 psi | 86% | 2500 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 55,999 psi | 88% | 2546 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,143 psi | 86% | 2559 fps | 99.6% |
| Lovex S070 | <<locked>> | 98% | 56,028 psi | 88% | 2592 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,041 psi | 55% | 2293 fps | 95.8% |
| Norma 201 | <<locked>> | 86% | 54,273 psi | 85% | 2513 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,868 psi | 86% | 2513 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,362 psi | 88% | 2595 fps | 100% |
| Norma 204 | <<locked>> | 98% | 54,520 psi | 85% | 2608 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 44,875 psi | 70% | 2562 fps | 97.3% |
| Norma URPᴾ | <<locked>> | 100% | 57,653 psi | 90% | 2661 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 56,971 psi | 89% | 2621 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,202 psi | 88% | 2661 fps | 99.6% |
| Ramshot TAC | <<locked>> | 84% | 54,694 psi | 86% | 2546 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,302 psi | 85% | 2559 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,158 psi | 86% | 2523 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,245 psi | 57% | 1572 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,392 psi | 90% | 2539 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,824 psi | 86% | 2556 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,273 psi | 85% | 2625 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,246 psi | 90% | 2700 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,607 psi | 86% | 2648 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,940 psi | 85% | 2674 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 84% | 55,463 psi | 87% | 2493 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,868 psi | 86% | 2513 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,145 psi | 90% | 2595 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 51,663 psi | 81% | 2533 fps | 95.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 47,471 psi | 74% | 2530 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 96% | 57,188 psi | 90% | 2582 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,143 psi | 86% | 2559 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,361 psi | 87% | 2543 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,999 psi | 88% | 2546 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,028 psi | 88% | 2592 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,245 psi | 87% | 2608 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,768 psi | 89% | 2572 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,392 psi | 90% | 2585 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,825 psi | 87% | 2454 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,927 psi | 88% | 2451 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,288 psi | 87% | 2516 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 47,036 psi | 74% | 2526 fps | 96.4% |
| Somchem S321 | <<locked>> | 82% | 55,666 psi | 87% | 2549 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,129 psi | 86% | 2451 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,507 psi | 89% | 2562 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 57,406 psi | 90% | 2592 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 2612 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,269 psi | 76% | 2516 fps | 97.5% |
| Vihtavuori N130 | <<locked>> | 82% | 55,637 psi | 87% | 2415 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,101 psi | 88% | 2434 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,694 psi | 86% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,492 psi | 87% | 2493 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,274 psi | 87% | 2526 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,463 psi | 88% | 2605 fps | 100% |
| Vihtavuori N530 | <<locked>> | 84% | 55,085 psi | 86% | 2520 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,927 psi | 89% | 2536 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,390 psi | 87% | 2615 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,309 psi | 69% | 2520 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,666 psi | 89% | 2585 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,100 psi | 86% | 2562 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,302 psi | 85% | 2628 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,911 psi | 56% | 2470 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 57,551 psi | 90% | 2598 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% | 49,966 psi | 78% | 2382 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,728 psi | 67% | 2326 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,835 psi | 78% | 2461 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,800 psi | 66% | 2306 fps | 95.6% |
| Accurate 3100 | <<locked>> | 94% | 34,301 psi | 54% | 2277 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 40,408 psi | 63% | 2326 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 29,689 psi | 47% | 2182 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 46,050 psi | 72% | 2431 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 39,160 psi | 61% | 2300 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 43,976 psi | 69% | 2457 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,124 psi | 75% | 2431 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,762 psi | 76% | 2405 fps | 100% |
| Alliant Power Pro 2000-MR | 68.2 gr | 80% | 41,989 psi | 66% | 2474 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,001 psi | 61% | 2323 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,756 psi | 65% | 2379 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,356 psi | 48% | 2198 fps | 95.9% |
| Alliant Reloder-17 | 67.2 gr | 80% | 33,678 psi | 53% | 2310 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 43,105 psi | 68% | 2451 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,281 psi | 41% | 2119 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 98% | 33,431 psi | 52% | 2310 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 90% | 31,763 psi | 50% | 2323 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,295 psi | 71% | 2441 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 38,667 psi | 61% | 2326 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 39,566 psi | 62% | 2303 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,937 psi | 78% | 2415 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,108 psi | 74% | 2457 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,127 psi | 82% | 2592 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,421 psi | 62% | 2333 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 36,550 psi | 57% | 2326 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 86% | 42,670 psi | 67% | 2395 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 46,528 psi | 73% | 2441 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,760 psi | 44% | 2106 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,627 psi | 67% | 2421 fps | 100% |
| Hodgdon Superformance | 76.3 gr | 86% | 38,421 psi | 60% | 2385 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 42% | 1368 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,614 psi | 70% | 2395 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 46,514 psi | 73% | 2425 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,133 psi | 64% | 2326 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,685 psi | 68% | 2349 fps | 96.9% |
| IMR 4350 | <<locked>> | 88% | 39,566 psi | 62% | 2329 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 82% | 38,595 psi | 60% | 2283 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 28,964 psi | 45% | 2149 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 42,801 psi | 67% | 2405 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 48,124 psi | 75% | 2431 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,469 psi | 71% | 2408 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,006 psi | 72% | 2369 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 41,191 psi | 65% | 2329 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 33,823 psi | 53% | 2195 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 36,332 psi | 57% | 2267 fps | 95.1% |
| Lovex S071 | <<locked>> | 98% | 32,909 psi | 52% | 2247 fps | 95% |
| Norma 201 | <<locked>> | 80% | 45,136 psi | 71% | 2385 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,542 psi | 71% | 2388 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,147 psi | 64% | 2369 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 44,614 psi | 70% | 2454 fps | 95.3% |
| Norma MRP | <<locked>> | 96% | 39,334 psi | 62% | 2457 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 30,182 psi | 47% | 2185 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 40,712 psi | 64% | 2382 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 35,795 psi | 56% | 2320 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 47,950 psi | 75% | 2444 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,587 psi | 75% | 2461 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,779 psi | 81% | 2474 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,006 psi | 42% | 1401 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,954 psi | 85% | 2497 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,784 psi | 62% | 2316 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,164 psi | 69% | 2474 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,839 psi | 56% | 2365 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 29,515 psi | 46% | 2198 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 33,808 psi | 53% | 2303 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 49,197 psi | 77% | 2411 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,989 psi | 67% | 2343 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 36,405 psi | 57% | 2277 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 48,457 psi | 76% | 2484 fps | 95% |
| Rottweil R 905 | <<locked>> | 98% | 44,469 psi | 70% | 2480 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 84% | 39,566 psi | 62% | 2303 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,823 psi | 53% | 2195 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,469 psi | 71% | 2408 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,191 psi | 65% | 2329 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 36,332 psi | 57% | 2267 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,275 psi | 58% | 2326 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,427 psi | 73% | 2425 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,541 psi | 70% | 2405 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,383 psi | 73% | 2329 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,696 psi | 61% | 2218 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 37,579 psi | 59% | 2238 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 44,063 psi | 69% | 2477 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 52,112 psi | 82% | 2503 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,035 psi | 72% | 2333 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,122 psi | 72% | 2418 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 37,159 psi | 58% | 2283 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 27,122 psi | 43% | 2146 fps | 97.9% |
| Somchem S385 | <<locked>> | 94% | 39,610 psi | 62% | 2369 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 52,243 psi | 82% | 2375 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,760 psi | 73% | 2320 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,598 psi | 67% | 2316 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,091 psi | 68% | 2329 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,331 psi | 55% | 2224 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 31,488 psi | 49% | 2185 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 80% | 48,269 psi | 76% | 2428 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,481 psi | 65% | 2326 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 30,980 psi | 49% | 2188 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 86% | 28,123 psi | 44% | 2185 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,256 psi | 49% | 2165 fps | 98.1% |
| Winchester 748 | <<locked>> | 80% | 48,095 psi | 75% | 2470 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 36,709 psi | 58% | 2329 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,237 psi | 41% | 2192 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,063 psi | 69% | 2408 fps | 99.9% |
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 106 powders for 9.5 x 66 SE v. Hofe loaded with the .375 | 300gr | Woodleigh HS. Alliant Reloder-17 delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,707 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 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 300.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, 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. Alliant Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 9.5 x 66 SE v. Hofe with the .375 | 300gr | Woodleigh HS 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.