Load Specifications
Bullet Manufacturer:Sierra
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 | Sierra GameKing bullet and 108 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and ReloadSwiss RS 70.
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% | 57,464 psi | 90% | 2477 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,478 psi | 89% | 2510 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,389 psi | 85% | 2530 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,056 psi | 86% | 2523 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,134 psi | 68% | 2448 fps | 98% |
| Accurate 4064 | <<locked>> | 90% | 56,507 psi | 89% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,304 psi | 88% | 2648 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 56,507 psi | 89% | 2589 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 57,464 psi | 90% | 2589 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 50,995 psi | 80% | 2585 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,492 psi | 87% | 2539 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,565 psi | 89% | 2503 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,275 psi | 88% | 2707 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 50,575 psi | 79% | 2582 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,288 psi | 85% | 2566 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,665 psi | 86% | 2585 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2697 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,998 psi | 86% | 2684 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 49,835 psi | 78% | 2572 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,017 psi | 64% | 2474 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,318 psi | 57% | 2388 fps | 96.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,977 psi | 72% | 2631 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,260 psi | 88% | 2605 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 54,679 psi | 86% | 2579 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,766 psi | 86% | 2559 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,956 psi | 89% | 2516 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,766 psi | 86% | 2569 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,058 psi | 89% | 2664 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,564 psi | 87% | 2595 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 96% | 55,317 psi | 87% | 2651 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 94% | 55,796 psi | 87% | 2612 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 86% | 57,101 psi | 89% | 2595 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,476 psi | 84% | 2579 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,623 psi | 89% | 2628 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,637 psi | 87% | 2687 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 56% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,839 psi | 86% | 2552 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,305 psi | 90% | 2569 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,985 psi | 89% | 2572 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,768 psi | 89% | 2559 fps | 99.1% |
| IMR 4350 | <<locked>> | 98% | 54,926 psi | 86% | 2585 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,594 psi | 89% | 2585 fps | 99.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2638 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 56,072 psi | 88% | 2612 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,492 psi | 87% | 2539 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,405 psi | 88% | 2562 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,854 psi | 88% | 2516 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 57,000 psi | 89% | 2566 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,941 psi | 88% | 2579 fps | 99.7% |
| Lovex S070 | <<locked>> | 98% | 57,000 psi | 89% | 2615 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,911 psi | 56% | 2316 fps | 96.2% |
| Norma 201 | <<locked>> | 86% | 55,303 psi | 87% | 2536 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,695 psi | 87% | 2530 fps | 100% |
| Norma 203B | <<locked>> | 90% | 57,305 psi | 90% | 2615 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,651 psi | 87% | 2635 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 45,788 psi | 72% | 2589 fps | 97.7% |
| Norma URP | <<locked>> | 98% | 55,085 psi | 86% | 2635 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 54,360 psi | 85% | 2598 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 57,551 psi | 90% | 2687 fps | 99.8% |
| Ramshot TAC | <<locked>> | 84% | 55,477 psi | 87% | 2566 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,187 psi | 86% | 2575 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,072 psi | 88% | 2539 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,347 psi | 57% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,854 psi | 88% | 2582 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,332 psi | 87% | 2648 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,549 psi | 85% | 2674 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,854 psi | 88% | 2671 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,230 psi | 87% | 2700 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 56,173 psi | 88% | 2510 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,666 psi | 87% | 2530 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,795 psi | 86% | 2572 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 52,547 psi | 82% | 2556 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 48,588 psi | 76% | 2559 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 94% | 54,766 psi | 86% | 2559 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,941 psi | 88% | 2579 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,405 psi | 88% | 2562 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 57,000 psi | 89% | 2566 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 57,000 psi | 89% | 2615 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,260 psi | 88% | 2628 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,983 psi | 85% | 2546 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,897 psi | 86% | 2566 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,666 psi | 89% | 2470 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,913 psi | 89% | 2470 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,260 psi | 88% | 2539 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,138 psi | 75% | 2552 fps | 96.8% |
| Somchem S321 | <<locked>> | 82% | 56,608 psi | 89% | 2569 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,072 psi | 88% | 2470 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,363 psi | 90% | 2579 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,853 psi | 86% | 2569 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,243 psi | 83% | 2635 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,298 psi | 77% | 2539 fps | 97.8% |
| Vihtavuori N130 | <<locked>> | 82% | 56,333 psi | 88% | 2428 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,971 psi | 89% | 2454 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,637 psi | 87% | 2493 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 56,217 psi | 88% | 2510 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,405 psi | 88% | 2546 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,740 psi | 90% | 2631 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 42,540 psi | 67% | 2415 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 84% | 55,912 psi | 88% | 2539 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,418 psi | 85% | 2513 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,565 psi | 89% | 2638 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,339 psi | 71% | 2543 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,696 psi | 90% | 2605 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,057 psi | 88% | 2582 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,521 psi | 87% | 2654 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,825 psi | 58% | 2500 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,752 psi | 86% | 2572 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 46,325 psi | 73% | 2480 fps | 96% |
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% | 50,908 psi | 80% | 2398 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,642 psi | 68% | 2346 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,691 psi | 79% | 2480 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,482 psi | 67% | 2329 fps | 95.9% |
| Accurate 3100 | <<locked>> | 92% | 32,938 psi | 52% | 2254 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 41,278 psi | 65% | 2346 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,385 psi | 48% | 2205 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 80% | 46,862 psi | 73% | 2451 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 39,885 psi | 63% | 2320 fps | 99% |
| ADI AR 2209 | <<locked>> | 96% | 44,802 psi | 70% | 2484 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,965 psi | 77% | 2451 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,806 psi | 78% | 2425 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,699 psi | 67% | 2493 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 44,512 psi | 70% | 2480 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,639 psi | 62% | 2339 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,540 psi | 67% | 2398 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,850 psi | 48% | 2218 fps | 96.3% |
| Alliant Reloder-17 | 68.4 gr | 80% | 34,301 psi | 54% | 2329 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 96% | 43,918 psi | 69% | 2474 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,266 psi | 40% | 2096 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,040 psi | 53% | 2336 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 88% | 30,371 psi | 48% | 2293 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,180 psi | 72% | 2461 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 39,407 psi | 62% | 2349 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 40,205 psi | 63% | 2323 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,546 psi | 79% | 2434 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,892 psi | 75% | 2474 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 53,185 psi | 83% | 2615 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,147 psi | 63% | 2352 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 37,202 psi | 58% | 2349 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 86% | 43,352 psi | 68% | 2415 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 47,326 psi | 74% | 2461 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,355 psi | 44% | 2129 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,381 psi | 68% | 2441 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 39,175 psi | 61% | 2411 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 42% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,368 psi | 71% | 2415 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,311 psi | 74% | 2444 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,887 psi | 66% | 2349 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,208 psi | 69% | 2369 fps | 97.2% |
| IMR 4350 | <<locked>> | 88% | 40,335 psi | 63% | 2352 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 36,898 psi | 58% | 2257 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 29,631 psi | 46% | 2172 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 43,584 psi | 68% | 2425 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 48,965 psi | 77% | 2451 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,296 psi | 73% | 2428 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,601 psi | 73% | 2385 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 41,843 psi | 66% | 2349 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 34,461 psi | 54% | 2215 fps | 95.9% |
| Lovex S070 | <<locked>> | 84% | 36,985 psi | 58% | 2290 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 33,591 psi | 53% | 2267 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 45,963 psi | 72% | 2405 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,238 psi | 72% | 2405 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,901 psi | 66% | 2388 fps | 99.7% |
| Norma 204 | <<locked>> | 92% | 45,484 psi | 71% | 2480 fps | 95.7% |
| Norma MRP | <<locked>> | 94% | 37,507 psi | 59% | 2425 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 30,850 psi | 48% | 2208 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 80% | 41,466 psi | 65% | 2402 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 34,229 psi | 54% | 2290 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 48,791 psi | 76% | 2467 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,544 psi | 76% | 2484 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,649 psi | 83% | 2497 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 42% | 1411 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,451 psi | 63% | 2336 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,034 psi | 71% | 2497 fps | 99.7% |
| ReloadSwiss RS 60 | 68.4 gr | 80% | 36,477 psi | 57% | 2385 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,110 psi | 47% | 2218 fps | 95.5% |
| ReloadSwiss RS 70 | 71.2 gr | 82% | 32,271 psi | 51% | 2274 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 49,908 psi | 78% | 2428 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,801 psi | 69% | 2362 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,144 psi | 58% | 2300 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 98% | 49,327 psi | 77% | 2507 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 96% | 42,554 psi | 67% | 2457 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 84% | 40,205 psi | 63% | 2323 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,461 psi | 54% | 2215 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,296 psi | 73% | 2428 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,843 psi | 66% | 2349 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 36,985 psi | 58% | 2290 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,971 psi | 60% | 2346 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,181 psi | 74% | 2444 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,266 psi | 71% | 2425 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,239 psi | 74% | 2349 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,479 psi | 62% | 2234 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,261 psi | 60% | 2257 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 42,177 psi | 66% | 2451 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 53,069 psi | 83% | 2523 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,804 psi | 73% | 2349 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,050 psi | 74% | 2441 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 37,927 psi | 59% | 2303 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 27,601 psi | 43% | 2165 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 38,000 psi | 60% | 2346 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 53,171 psi | 83% | 2392 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,630 psi | 75% | 2339 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,482 psi | 68% | 2336 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,874 psi | 69% | 2346 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,042 psi | 56% | 2244 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 32,111 psi | 50% | 2208 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 39,943 psi | 63% | 2369 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 49,095 psi | 77% | 2448 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,206 psi | 66% | 2343 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,604 psi | 50% | 2211 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 26,948 psi | 42% | 2162 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,865 psi | 50% | 2188 fps | 98.4% |
| Winchester 748 | <<locked>> | 80% | 48,907 psi | 77% | 2490 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 37,333 psi | 59% | 2349 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,179 psi | 39% | 2162 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,817 psi | 70% | 2428 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 43,236 psi | 68% | 2428 fps | 95.1% |
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 108 powders for 9.5 x 66 SE v. Hofe loaded with the .375 | 300gr | Sierra GameKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,542 fps to 2,707 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, 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 Power Pro Varmint 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 Reloder-17, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for 9.5 x 66 SE v. Hofe with the .375 | 300gr | Sierra GameKing 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.