Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 105gr | IBEX Viper bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Alliant Reloder-16.
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% | 54,737 psi | 86% | 3389 fps | 97.4% |
| Accurate 3100 | <<locked>> | 98% | 54,433 psi | 85% | 3445 fps | 98.9% |
| Accurate 4064 | <<locked>> | 82% | 55,463 psi | 87% | 3419 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,970 psi | 88% | 3514 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 86% | 57,319 psi | 90% | 3484 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,057 psi | 88% | 3540 fps | 97% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3593 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,855 psi | 89% | 3625 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,246 psi | 88% | 3533 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,114 psi | 86% | 3458 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,259 psi | 87% | 3481 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,492 psi | 87% | 3570 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,116 psi | 90% | 3599 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,550 psi | 87% | 3527 fps | 97% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3593 fps | 97.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 3520 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,050 psi | 74% | 3425 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,157 psi | 85% | 3615 fps | 99.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,228 psi | 82% | 3501 fps | 96.3% |
| Bofors RP3 | <<locked>> | 84% | 56,434 psi | 88% | 3481 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3593 fps | 97.4% |
| Bofors RP7 | <<locked>> | 88% | 55,463 psi | 87% | 3445 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 84% | 56,623 psi | 89% | 3494 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 57,290 psi | 90% | 3560 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 88% | 56,565 psi | 89% | 3507 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,246 psi | 88% | 3484 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,377 psi | 90% | 3533 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 53,708 psi | 84% | 3517 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 57% | 2257 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,609 psi | 90% | 3494 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,913 psi | 89% | 3471 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,956 psi | 88% | 3438 fps | 98.3% |
| IMR 4350 | <<locked>> | 92% | 56,202 psi | 88% | 3471 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,565 psi | 89% | 3474 fps | 98.4% |
| IMR 4831 | <<locked>> | 92% | 56,028 psi | 88% | 3497 fps | 99.8% |
| IMR 4895 | <<locked>> | 82% | 56,608 psi | 89% | 3517 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,522 psi | 90% | 3468 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,319 psi | 90% | 3478 fps | 99.4% |
| Lovex S070 | <<locked>> | 90% | 55,492 psi | 87% | 3465 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,675 psi | 76% | 3337 fps | 97.9% |
| Norma 203B | <<locked>> | 82% | 54,578 psi | 86% | 3465 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,159 psi | 90% | 3533 fps | 97% |
| Norma MRP | <<locked>> | 98% | 56,521 psi | 89% | 3622 fps | 98.6% |
| Norma URP | <<locked>> | 92% | 57,392 psi | 90% | 3550 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 55,303 psi | 87% | 3488 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,593 psi | 87% | 3570 fps | 96% |
| Ramshot Hunter | <<locked>> | 92% | 56,333 psi | 88% | 3543 fps | 99.1% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,241 psi | 79% | 3425 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 59% | 2313 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,217 psi | 88% | 3465 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,376 psi | 88% | 3593 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,550 psi | 87% | 3530 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,319 psi | 90% | 3622 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,644 psi | 73% | 3445 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 82% | 56,202 psi | 88% | 3432 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,724 psi | 89% | 3478 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,609 psi | 90% | 3504 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 96% | 54,897 psi | 86% | 3510 fps | 97% |
| Rottweil R 907 | <<locked>> | 88% | 55,463 psi | 87% | 3445 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,319 psi | 90% | 3478 fps | 99.4% |
| Shooters World Precision | <<locked>> | 84% | 57,522 psi | 90% | 3468 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,492 psi | 87% | 3465 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,551 psi | 90% | 3533 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,637 psi | 89% | 3343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,116 psi | 90% | 3419 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,418 psi | 85% | 3501 fps | 96.8% |
| Somchem S355 | <<locked>> | 86% | 56,260 psi | 88% | 3468 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 57,101 psi | 89% | 3556 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,883 psi | 88% | 3484 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 82% | 56,260 psi | 88% | 3383 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,275 psi | 88% | 3392 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,435 psi | 90% | 3435 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,057 psi | 88% | 3484 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 3448 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 82% | 54,737 psi | 86% | 3383 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,405 psi | 87% | 3484 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 98% | 56,826 psi | 89% | 3563 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,651 psi | 87% | 3435 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,493 psi | 90% | 3563 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,182 psi | 77% | 3589 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,724 psi | 87% | 3468 fps | 96.9% |
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% | 51,445 psi | 81% | 3323 fps | 96.8% |
| Accurate 3100 | <<locked>> | 88% | 39,305 psi | 62% | 3127 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 52,330 psi | 82% | 3363 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,118 psi | 63% | 3186 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 80% | 47,892 psi | 75% | 3304 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 49,240 psi | 77% | 3402 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 53,911 psi | 84% | 3517 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,069 psi | 83% | 3556 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 49,414 psi | 77% | 3399 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,776 psi | 76% | 3340 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,837 psi | 81% | 3419 fps | 99.7% |
| Alliant Reloder-16 | 61.6 gr | 80% | 38,305 psi | 60% | 3182 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,366 psi | 68% | 3330 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 48,878 psi | 77% | 3392 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 49,864 psi | 78% | 3455 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 30,806 psi | 48% | 2963 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 94% | 39,175 psi | 61% | 3222 fps | 96% |
| Alliant Reloder-26 | 71.4 gr | 84% | 35,621 psi | 56% | 3169 fps | 95.4% |
| Bofors RP15 | <<locked>> | 98% | 48,965 psi | 77% | 3432 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 49,719 psi | 78% | 3360 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 49,864 psi | 78% | 3455 fps | 95.8% |
| Bofors RP7 | <<locked>> | 82% | 46,195 psi | 72% | 3255 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 49,763 psi | 78% | 3363 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 44,222 psi | 69% | 3287 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 46,905 psi | 74% | 3307 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,056 psi | 56% | 3061 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,824 psi | 84% | 3471 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 43,569 psi | 68% | 3297 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 2028 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,143 psi | 85% | 3432 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,372 psi | 79% | 3346 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,576 psi | 82% | 3373 fps | 97.7% |
| IMR 4350 | <<locked>> | 84% | 44,164 psi | 69% | 3225 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,556 psi | 70% | 3222 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 38,290 psi | 60% | 3123 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 53,185 psi | 83% | 3455 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,010 psi | 80% | 3353 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,685 psi | 67% | 3176 fps | 96.7% |
| Lovex S070 | <<locked>> | 80% | 41,031 psi | 64% | 3150 fps | 95% |
| Lovex S071 | <<locked>> | 94% | 40,466 psi | 63% | 3156 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 51,314 psi | 80% | 3406 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 50,038 psi | 78% | 3392 fps | 95.4% |
| Norma MRP | 74.2 gr | 90% | 43,105 psi | 68% | 3337 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 39,436 psi | 62% | 3169 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 51,735 psi | 81% | 3422 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 51,982 psi | 81% | 3497 fps | 95% |
| Ramshot Hunter | <<locked>> | 82% | 40,683 psi | 64% | 3209 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 46,905 psi | 74% | 3356 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 44% | 2077 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,545 psi | 78% | 3333 fps | 97.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,861 psi | 72% | 3399 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,682 psi | 62% | 3196 fps | 96.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,334 psi | 60% | 3189 fps | 96% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 43,584 psi | 68% | 3363 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 52,997 psi | 83% | 3373 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,036 psi | 74% | 3301 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 54,273 psi | 85% | 3438 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 92% | 48,327 psi | 76% | 3376 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 82% | 46,195 psi | 72% | 3255 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,685 psi | 67% | 3176 fps | 96.7% |
| Shooters World Precision | <<locked>> | 80% | 51,010 psi | 80% | 3353 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,031 psi | 64% | 3150 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,500 psi | 74% | 3346 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,326 psi | 74% | 3186 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,843 psi | 66% | 3107 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 47,877 psi | 75% | 3373 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 46,992 psi | 74% | 3294 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 35,984 psi | 56% | 3123 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 46,253 psi | 72% | 3291 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 53,011 psi | 83% | 3330 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,069 psi | 83% | 3340 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,904 psi | 70% | 3209 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,596 psi | 64% | 3163 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 94% | 45,339 psi | 71% | 3255 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 51,488 psi | 81% | 3327 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,364 psi | 63% | 3169 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 80% | 32,053 psi | 50% | 2995 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,929 psi | 63% | 3127 fps | 99.2% |
| Winchester 760 | <<locked>> | 82% | 44,396 psi | 70% | 3294 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 29,573 psi | 46% | 3002 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 94% | 48,704 psi | 76% | 3337 fps | 95.3% |
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 81 powders for 7 x 66 SE v. Hofe loaded with the .284 | 105gr | IBEX Viper. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,625 fps; across all powders the maximum-charge window runs from 2,257 fps to 3,625 fps. ADI AR 2213 gives the best case fill at 100 %, and 81 of the 81 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 105.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2213, Alliant Reloder-22, Alliant Reloder-23 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, Norma MRP, Alliant Reloder-16 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 105gr | IBEX Viper 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.