Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 100gr | Barnes X S bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 and Norma MRP.
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.
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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 2700 | <<locked>> | 82% | 54,868 psi | 86% | 3458 fps | 97.2% |
| Accurate 3100 | <<locked>> | 98% | 54,433 psi | 85% | 3510 fps | 98.7% |
| Accurate 4064 | <<locked>> | 82% | 55,448 psi | 87% | 3488 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,927 psi | 88% | 3583 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 86% | 57,392 psi | 90% | 3556 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 96% | 56,144 psi | 88% | 3606 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,724 psi | 89% | 3694 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,333 psi | 88% | 3602 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,187 psi | 86% | 3530 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,317 psi | 87% | 3553 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,637 psi | 87% | 3642 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,188 psi | 90% | 3671 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,593 psi | 87% | 3593 fps | 96.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,927 psi | 89% | 3658 fps | 97.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,954 psi | 85% | 3593 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,239 psi | 74% | 3488 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,418 psi | 85% | 3681 fps | 99.7% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,431 psi | 82% | 3566 fps | 96% |
| Bofors RP3 | <<locked>> | 84% | 56,405 psi | 88% | 3553 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,927 psi | 89% | 3658 fps | 97.2% |
| Bofors RP7 | <<locked>> | 88% | 55,419 psi | 87% | 3514 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 84% | 56,579 psi | 89% | 3563 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 90% | 57,363 psi | 90% | 3629 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 88% | 56,550 psi | 89% | 3576 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,391 psi | 88% | 3553 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,493 psi | 90% | 3606 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 53,925 psi | 85% | 3586 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 57% | 2323 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,855 psi | 89% | 3540 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,782 psi | 87% | 3507 fps | 98.1% |
| IMR 4350 | <<locked>> | 92% | 56,231 psi | 88% | 3540 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,652 psi | 89% | 3543 fps | 98.2% |
| IMR 4831 | <<locked>> | 92% | 55,941 psi | 88% | 3566 fps | 99.8% |
| IMR 4895 | <<locked>> | 82% | 56,724 psi | 89% | 3589 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,464 psi | 90% | 3540 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,392 psi | 90% | 3547 fps | 99.2% |
| Lovex S070 | <<locked>> | 90% | 55,463 psi | 87% | 3530 fps | 98.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,573 psi | 76% | 3399 fps | 97.7% |
| Norma 203B | <<locked>> | 82% | 54,723 psi | 86% | 3537 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,377 psi | 90% | 3602 fps | 96.8% |
| Norma MRP | <<locked>> | 98% | 56,811 psi | 89% | 3691 fps | 98.4% |
| Norma URP | <<locked>> | 92% | 57,493 psi | 90% | 3619 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 82% | 55,172 psi | 86% | 3556 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 56,492 psi | 89% | 3612 fps | 99% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,560 psi | 79% | 3494 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 58% | 2375 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,333 psi | 88% | 3533 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,536 psi | 89% | 3671 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,492 psi | 87% | 3596 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,392 psi | 90% | 3688 fps | 99.7% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,891 psi | 73% | 3507 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 82% | 56,246 psi | 88% | 3501 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,695 psi | 89% | 3550 fps | 100% |
| Rottweil R 905 | <<locked>> | 96% | 54,998 psi | 86% | 3579 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 88% | 55,419 psi | 87% | 3514 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,392 psi | 90% | 3547 fps | 99.2% |
| Shooters World Precision | <<locked>> | 84% | 57,464 psi | 90% | 3540 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,463 psi | 87% | 3530 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,551 psi | 90% | 3602 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,623 psi | 89% | 3415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,232 psi | 90% | 3484 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,520 psi | 85% | 3570 fps | 96.6% |
| Somchem S355 | <<locked>> | 86% | 56,289 psi | 88% | 3540 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 57,072 psi | 89% | 3625 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,927 psi | 88% | 3550 fps | 97.7% |
| Vihtavuori N135 | <<locked>> | 82% | 56,188 psi | 88% | 3455 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,275 psi | 88% | 3465 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,508 psi | 90% | 3507 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,985 psi | 88% | 3550 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3510 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 82% | 54,766 psi | 86% | 3455 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,463 psi | 87% | 3556 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 98% | 56,956 psi | 89% | 3632 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,709 psi | 87% | 3504 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,493 psi | 90% | 3629 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,458 psi | 78% | 3661 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,796 psi | 87% | 3533 fps | 96.7% |
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 2700 | <<locked>> | 80% | 51,459 psi | 81% | 3392 fps | 96.5% |
| Accurate 3100 | <<locked>> | 88% | 39,349 psi | 62% | 3186 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 52,170 psi | 82% | 3432 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,118 psi | 63% | 3245 fps | 97% |
| ADI AR 2208 | <<locked>> | 80% | 47,790 psi | 75% | 3373 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 92% | 49,327 psi | 77% | 3468 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,982 psi | 83% | 3622 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 49,501 psi | 78% | 3465 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,834 psi | 77% | 3409 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,837 psi | 81% | 3488 fps | 99.6% |
| Alliant Reloder-16 | 63.5 gr | 80% | 38,189 psi | 60% | 3241 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,395 psi | 68% | 3392 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 92% | 48,965 psi | 77% | 3455 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 49,908 psi | 78% | 3517 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 30,806 psi | 48% | 3015 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 39,189 psi | 61% | 3278 fps | 95.6% |
| Alliant Reloder-26 | 75.4 gr | 86% | 38,130 psi | 60% | 3297 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 49,008 psi | 77% | 3494 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 49,661 psi | 78% | 3425 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 49,908 psi | 78% | 3517 fps | 95.5% |
| Bofors RP7 | <<locked>> | 82% | 46,166 psi | 72% | 3320 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 49,864 psi | 78% | 3432 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 44,193 psi | 69% | 3350 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 84% | 49,850 psi | 78% | 3438 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,984 psi | 56% | 3120 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,664 psi | 84% | 3540 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 46,644 psi | 73% | 3435 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 43% | 2087 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,256 psi | 79% | 3415 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,518 psi | 82% | 3442 fps | 97.5% |
| IMR 4350 | <<locked>> | 86% | 46,949 psi | 74% | 3353 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,541 psi | 70% | 3287 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 38,319 psi | 60% | 3182 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 53,200 psi | 83% | 3524 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 51,068 psi | 80% | 3425 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,540 psi | 67% | 3238 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 43,468 psi | 68% | 3274 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 40,451 psi | 63% | 3212 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 51,242 psi | 80% | 3471 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 50,183 psi | 79% | 3461 fps | 95.1% |
| Norma MRP | 76.6 gr | 90% | 43,337 psi | 68% | 3402 fps | 95% |
| Norma URP | <<locked>> | 80% | 39,291 psi | 62% | 3228 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 51,706 psi | 81% | 3488 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 40,857 psi | 64% | 3271 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 46,905 psi | 74% | 3412 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 44% | 2136 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,588 psi | 78% | 3402 fps | 97.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,890 psi | 72% | 3465 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,711 psi | 62% | 3255 fps | 96.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,261 psi | 60% | 3245 fps | 95.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 43,729 psi | 69% | 3422 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,881 psi | 83% | 3442 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,862 psi | 73% | 3363 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 92% | 48,414 psi | 76% | 3442 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 46,166 psi | 72% | 3320 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,540 psi | 67% | 3238 fps | 96.4% |
| Shooters World Precision | <<locked>> | 80% | 51,068 psi | 80% | 3425 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 43,468 psi | 68% | 3274 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,543 psi | 75% | 3412 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,253 psi | 74% | 3251 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 44,469 psi | 70% | 3228 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 51,169 psi | 80% | 3504 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 46,862 psi | 73% | 3356 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 35,969 psi | 56% | 3186 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 46,340 psi | 73% | 3356 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 52,939 psi | 83% | 3402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,910 psi | 83% | 3409 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,744 psi | 70% | 3271 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 40,596 psi | 64% | 3228 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 96% | 48,501 psi | 76% | 3386 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 51,590 psi | 81% | 3399 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,451 psi | 63% | 3232 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 34,243 psi | 54% | 3120 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,856 psi | 62% | 3186 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 44,396 psi | 70% | 3356 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 29,515 psi | 46% | 3051 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 94% | 48,820 psi | 77% | 3399 fps | 95% |
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 77 powders for 7 x 66 SE v. Hofe loaded with the .284 | 100gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,694 fps; across all powders the maximum-charge window runs from 2,323 fps to 3,694 fps. Alliant Reloder-22 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.284" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-22, Alliant Reloder-23, Alliant Reloder-25 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-26, Alliant Reloder-16, Norma MRP rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 100gr | Barnes X S 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.