Load Specifications
Bullet:.375 | 300gr | Atomic 29 HP
Bullet Manufacturer:Atomic 29
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:1:16.0
Load data in caliber 9.5 x 66 SE v. Hofe with .375 | 300gr | 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 Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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% | 56,971 psi | 89% | 2461 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,303 psi | 87% | 2490 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,056 psi | 86% | 2484 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 57,479 psi | 90% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,882 psi | 86% | 2500 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 38,682 psi | 61% | 2359 fps | 96.6% |
| Accurate 4064 | <<locked>> | 92% | 55,027 psi | 86% | 2530 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 2615 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 56,057 psi | 88% | 2566 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 57,072 psi | 89% | 2566 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,259 psi | 87% | 2520 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,985 psi | 88% | 2487 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 57,232 psi | 90% | 2615 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,782 psi | 87% | 2680 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,985 psi | 89% | 2582 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,608 psi | 89% | 2461 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 57,624 psi | 90% | 2605 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,982 psi | 83% | 2621 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,969 psi | 85% | 2654 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,391 psi | 59% | 2388 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,611 psi | 65% | 2533 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,999 psi | 88% | 2585 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 57,667 psi | 90% | 2598 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,085 psi | 85% | 2530 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 57,087 psi | 89% | 2500 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,288 psi | 85% | 2549 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,608 psi | 89% | 2644 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 55,912 psi | 88% | 2503 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,869 psi | 89% | 2533 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,071 psi | 86% | 2569 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 98% | 54,317 psi | 85% | 2618 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 96% | 55,317 psi | 87% | 2582 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 88% | 56,608 psi | 89% | 2572 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,153 psi | 77% | 2507 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,101 psi | 88% | 2608 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,230 psi | 87% | 2657 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,215 psi | 55% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,520 psi | 85% | 2533 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 56,579 psi | 89% | 2549 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,579 psi | 89% | 2549 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,913 psi | 89% | 2539 fps | 98.9% |
| IMR 4198 | <<locked>> | 82% | 56,695 psi | 89% | 2418 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 2556 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,202 psi | 88% | 2559 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,880 psi | 81% | 2562 fps | 99.9% |
| IMR 4895 | <<locked>> | 90% | 55,535 psi | 87% | 2589 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,259 psi | 87% | 2520 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,114 psi | 86% | 2503 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,651 psi | 87% | 2539 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,825 psi | 87% | 2500 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 56,217 psi | 88% | 2543 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,245 psi | 87% | 2549 fps | 99.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,217 psi | 88% | 2585 fps | 99% |
| Norma 201 | <<locked>> | 88% | 54,766 psi | 86% | 2513 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,274 psi | 87% | 2510 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,710 psi | 89% | 2592 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 2602 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 41,901 psi | 66% | 2497 fps | 96.2% |
| Norma URPᴾ | <<locked>> | 100% | 54,157 psi | 85% | 2608 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 92% | 57,682 psi | 90% | 2621 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,837 psi | 83% | 2605 fps | 99.2% |
| Ramshot TAC | <<locked>> | 86% | 55,506 psi | 87% | 2546 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,955 psi | 86% | 2556 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,101 psi | 88% | 2523 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,824 psi | 56% | 1552 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,607 psi | 86% | 2497 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,463 psi | 87% | 2556 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,447 psi | 85% | 2618 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 57,638 psi | 90% | 2697 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 2638 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 2667 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 86% | 55,608 psi | 87% | 2490 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,172 psi | 86% | 2510 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 57,276 psi | 90% | 2589 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,085 psi | 85% | 2530 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,245 psi | 87% | 2549 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,651 psi | 87% | 2539 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,217 psi | 88% | 2543 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,217 psi | 88% | 2585 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,579 psi | 87% | 2605 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 57,696 psi | 90% | 2480 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 57,595 psi | 90% | 2572 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,404 psi | 85% | 2539 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,449 psi | 88% | 2451 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,579 psi | 89% | 2451 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,738 psi | 87% | 2510 fps | 98.7% |
| Somchem S321 | <<locked>> | 84% | 56,463 psi | 88% | 2552 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,767 psi | 87% | 2451 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,145 psi | 90% | 2559 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 57,609 psi | 90% | 2585 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,399 psi | 76% | 2559 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 44,860 psi | 70% | 2454 fps | 96.5% |
| Vihtavuori N130 | <<locked>> | 84% | 56,231 psi | 88% | 2415 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,724 psi | 89% | 2434 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,926 psi | 86% | 2474 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,825 psi | 87% | 2490 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,637 psi | 87% | 2523 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,782 psi | 89% | 2602 fps | 100% |
| Vihtavuori N530 | <<locked>> | 86% | 55,680 psi | 87% | 2520 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 57,580 psi | 90% | 2536 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,666 psi | 87% | 2608 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,785 psi | 64% | 2457 fps | 99.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,363 psi | 90% | 2582 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 55,579 psi | 87% | 2562 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,534 psi | 85% | 2621 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,272 psi | 52% | 2395 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,244 psi | 85% | 2549 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% | 47,340 psi | 74% | 2343 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,532 psi | 81% | 2444 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,436 psi | 62% | 2277 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,731 psi | 73% | 2415 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,076 psi | 66% | 2303 fps | 95.3% |
| Accurate 3100 | <<locked>> | 96% | 33,576 psi | 53% | 2260 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 37,318 psi | 58% | 2274 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 29,080 psi | 46% | 2169 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 43,439 psi | 68% | 2382 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 36,999 psi | 58% | 2251 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,600 psi | 71% | 2385 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,832 psi | 72% | 2365 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 53,476 psi | 84% | 2566 fps | 100% |
| Alliant Power Pro 2000-MR | 65.9 gr | 80% | 39,537 psi | 62% | 2418 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,419 psi | 57% | 2270 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 53,345 psi | 84% | 2421 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,160 psi | 61% | 2326 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,139 psi | 47% | 2185 fps | 95.4% |
| Alliant Reloder-17 | 64.9 gr | 80% | 31,386 psi | 49% | 2247 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 25,875 psi | 41% | 2103 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 92% | 31,459 psi | 49% | 2306 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,801 psi | 67% | 2392 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 35,839 psi | 56% | 2274 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 39,668 psi | 62% | 2297 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,485 psi | 74% | 2375 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,309 psi | 69% | 2408 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,037 psi | 77% | 2539 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 80% | 52,446 psi | 82% | 2464 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 53,272 psi | 83% | 2490 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,854 psi | 58% | 2277 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 88% | 38,943 psi | 61% | 2369 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 88% | 42,888 psi | 67% | 2392 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 43,874 psi | 69% | 2392 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 25,730 psi | 40% | 2047 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,885 psi | 63% | 2369 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 90% | 41,350 psi | 65% | 2434 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,165 psi | 41% | 1352 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,163 psi | 66% | 2349 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 43,671 psi | 68% | 2382 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,841 psi | 61% | 2280 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,466 psi | 65% | 2300 fps | 96.1% |
| IMR 4198 | <<locked>> | 80% | 53,664 psi | 84% | 2382 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 39,697 psi | 62% | 2323 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 38,943 psi | 61% | 2283 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 28,558 psi | 45% | 2139 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 40,132 psi | 63% | 2352 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,600 psi | 71% | 2385 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 51,576 psi | 81% | 2457 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,380 psi | 66% | 2359 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,816 psi | 69% | 2326 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 38,682 psi | 61% | 2283 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 33,634 psi | 53% | 2188 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 38,464 psi | 60% | 2306 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 42,496 psi | 67% | 2336 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 42,815 psi | 67% | 2343 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,508 psi | 60% | 2316 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 44,860 psi | 70% | 2448 fps | 95% |
| Norma MRP | <<locked>> | 98% | 39,175 psi | 61% | 2444 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 29,907 psi | 47% | 2175 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 38,130 psi | 60% | 2333 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 35,592 psi | 56% | 2310 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 45,527 psi | 71% | 2398 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,020 psi | 71% | 2415 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,240 psi | 77% | 2431 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,469 psi | 41% | 1385 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,343 psi | 80% | 2454 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,333 psi | 59% | 2264 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,307 psi | 65% | 2421 fps | 99.2% |
| ReloadSwiss RS 60 | 64.9 gr | 80% | 33,504 psi | 53% | 2306 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,154 psi | 49% | 2234 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 33,765 psi | 53% | 2293 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 46,427 psi | 73% | 2369 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,393 psi | 63% | 2293 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 33,794 psi | 53% | 2224 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 39,668 psi | 62% | 2297 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 33,634 psi | 53% | 2188 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,380 psi | 66% | 2359 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,682 psi | 61% | 2283 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 38,464 psi | 60% | 2306 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,911 psi | 55% | 2274 fps | 98.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 54,346 psi | 85% | 2441 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,714 psi | 69% | 2375 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,134 psi | 66% | 2359 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,106 psi | 69% | 2290 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,608 psi | 57% | 2175 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 37,420 psi | 59% | 2231 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 49,371 psi | 77% | 2457 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,569 psi | 68% | 2293 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,555 psi | 68% | 2372 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 34,708 psi | 54% | 2231 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 24,947 psi | 39% | 2083 fps | 96.6% |
| Somchem S385 | <<locked>> | 98% | 42,105 psi | 66% | 2408 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 49,879 psi | 78% | 2339 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,512 psi | 70% | 2283 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,972 psi | 63% | 2274 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,654 psi | 64% | 2287 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,011 psi | 52% | 2175 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 31,299 psi | 49% | 2178 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 45,687 psi | 72% | 2382 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,059 psi | 61% | 2280 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 30,676 psi | 48% | 2182 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 27,383 psi | 43% | 2169 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,283 psi | 46% | 2113 fps | 97.1% |
| Winchester 748 | <<locked>> | 80% | 45,252 psi | 71% | 2425 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 39,102 psi | 61% | 2372 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 92% | 25,657 psi | 40% | 2162 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,408 psi | 65% | 2359 fps | 99.7% |
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 | 300gr | Atomic 29 HP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,697 fps; across all powders the maximum-charge window runs from 1,512 fps to 2,697 fps. Accurate 3100 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 52–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:16.0 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. Alliant Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for 9.5 x 66 SE v. Hofe with the .375 | 300gr | 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.