Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 120gr | Hornady V-MAX bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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% | 56,188 psi | 88% | 3261 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 55,970 psi | 88% | 3317 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 55,927 psi | 88% | 3251 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,638 psi | 90% | 3376 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,348 psi | 90% | 3474 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 84% | 55,506 psi | 87% | 3284 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,607 psi | 86% | 3353 fps | 98% |
| ADI AR 2213 | <<locked>> | 98% | 56,086 psi | 88% | 3412 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,839 psi | 86% | 3353 fps | 98.1% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,839 psi | 86% | 3353 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,637 psi | 89% | 3310 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,739 psi | 89% | 3337 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,418 psi | 85% | 3376 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,709 psi | 87% | 3396 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,128 psi | 85% | 3340 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,579 psi | 87% | 3406 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,318 psi | 88% | 3389 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,733 psi | 76% | 3310 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,188 psi | 90% | 3488 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3386 fps | 98.1% |
| Bofors RP3 | <<locked>> | 82% | 54,041 psi | 85% | 3271 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,579 psi | 87% | 3406 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 56,927 psi | 89% | 3317 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,196 psi | 76% | 3241 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 82% | 54,230 psi | 85% | 3287 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 55,695 psi | 87% | 3363 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 86% | 54,940 psi | 86% | 3317 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 56,202 psi | 88% | 3346 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,042 psi | 86% | 3327 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,911 psi | 86% | 3291 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,819 psi | 75% | 3356 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 88% | 56,202 psi | 88% | 3402 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 57% | 2129 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,955 psi | 86% | 3268 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,522 psi | 90% | 3307 fps | 99.4% |
| IMR 4350 | <<locked>> | 90% | 54,795 psi | 86% | 3291 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,998 psi | 86% | 3284 fps | 99.1% |
| IMR 4831 | <<locked>> | 90% | 54,186 psi | 85% | 3301 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,537 psi | 90% | 3337 fps | 97% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,522 psi | 90% | 3451 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 55,434 psi | 87% | 3261 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,434 psi | 87% | 3284 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,884 psi | 89% | 3330 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,734 psi | 78% | 3205 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 56,057 psi | 88% | 3320 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,695 psi | 87% | 3346 fps | 98% |
| Norma MRP | <<locked>> | 96% | 55,419 psi | 87% | 3438 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 55,927 psi | 88% | 3353 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,319 psi | 90% | 3346 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,288 psi | 85% | 3402 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 90% | 54,897 psi | 86% | 3353 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,634 psi | 82% | 3330 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,304 psi | 58% | 2178 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,085 psi | 85% | 3264 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,216 psi | 87% | 3389 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,667 psi | 90% | 3396 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,883 psi | 88% | 3425 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,356 psi | 76% | 3353 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 82% | 57,188 psi | 90% | 3274 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,317 psi | 85% | 3268 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,231 psi | 88% | 3323 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 96% | 57,159 psi | 90% | 3392 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 56,927 psi | 89% | 3317 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,434 psi | 87% | 3284 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,434 psi | 87% | 3261 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,884 psi | 89% | 3330 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,941 psi | 88% | 3333 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,766 psi | 86% | 3140 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,810 psi | 86% | 3225 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,681 psi | 89% | 3386 fps | 98.5% |
| Somchem S355 | <<locked>> | 86% | 57,653 psi | 90% | 3320 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,433 psi | 85% | 3248 fps | 96.1% |
| Somchem S365 | <<locked>> | 92% | 55,709 psi | 87% | 3353 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,099 psi | 85% | 3297 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 57,696 psi | 90% | 3225 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,347 psi | 87% | 3232 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,302 psi | 85% | 3287 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3337 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 56,101 psi | 88% | 3232 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,159 psi | 90% | 3350 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,100 psi | 86% | 3363 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,434 psi | 87% | 3422 fps | 96.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,155 psi | 80% | 3317 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,027 psi | 85% | 3241 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,927 psi | 88% | 3373 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3471 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,143 psi | 85% | 3287 fps | 97.9% |
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% | 52,649 psi | 83% | 3199 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 34,461 psi | 54% | 2864 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 52,576 psi | 82% | 3199 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,538 psi | 64% | 3045 fps | 98.6% |
| Accurate High Country | <<locked>> | 90% | 46,180 psi | 72% | 3255 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 49,081 psi | 77% | 3169 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 44,715 psi | 70% | 3153 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 48,936 psi | 77% | 3271 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 45,034 psi | 71% | 3156 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 45,034 psi | 71% | 3156 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,864 psi | 78% | 3196 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,156 psi | 83% | 3274 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,131 psi | 61% | 3054 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,817 psi | 70% | 3196 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,556 psi | 70% | 3146 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,221 psi | 66% | 3133 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,950 psi | 45% | 2772 fps | 96.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,938 psi | 52% | 2907 fps | 95% |
| Alliant Reloder-26 | 68.1 gr | 80% | 31,198 psi | 49% | 2894 fps | 95% |
| Bofors RP15 | <<locked>> | 94% | 44,628 psi | 70% | 3186 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 50,546 psi | 79% | 3209 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,221 psi | 66% | 3133 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,179 psi | 69% | 3064 fps | 96.6% |
| Hodgdon H1000 | <<locked>> | 98% | 44,991 psi | 71% | 3169 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 50,763 psi | 80% | 3222 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 42,482 psi | 67% | 3097 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,165 psi | 71% | 3123 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 94% | 52,489 psi | 82% | 3281 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,343 psi | 80% | 3258 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,767 psi | 58% | 2933 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,800 psi | 66% | 3202 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 41,582 psi | 65% | 3107 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,253 psi | 43% | 1906 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,648 psi | 81% | 3209 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,940 psi | 85% | 3241 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 39,711 psi | 62% | 2976 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,513 psi | 71% | 3097 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 38,827 psi | 61% | 2986 fps | 98.3% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,560 psi | 79% | 3209 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 50,053 psi | 78% | 3307 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 51,938 psi | 81% | 3202 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,120 psi | 68% | 3041 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 41,263 psi | 65% | 3015 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 35,853 psi | 56% | 2900 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 52,518 psi | 82% | 3258 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,266 psi | 71% | 3140 fps | 95.6% |
| Norma MRP | 71 gr | 86% | 38,624 psi | 61% | 3077 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,030 psi | 63% | 3035 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 53,490 psi | 84% | 3284 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,847 psi | 73% | 3248 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 39,015 psi | 61% | 3018 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 94% | 41,814 psi | 66% | 3104 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 44% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,720 psi | 79% | 3205 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,572 psi | 75% | 3258 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,553 psi | 64% | 3068 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,117 psi | 61% | 3071 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,856 psi | 61% | 3110 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 53,795 psi | 84% | 3219 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,485 psi | 74% | 3146 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,269 psi | 77% | 3192 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 43,569 psi | 68% | 3123 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,179 psi | 69% | 3064 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,120 psi | 68% | 3041 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 51,938 psi | 81% | 3202 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,263 psi | 65% | 3015 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,863 psi | 77% | 3205 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,312 psi | 76% | 3038 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,264 psi | 66% | 2976 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,207 psi | 68% | 3117 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 47,761 psi | 75% | 3150 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,865 psi | 80% | 3182 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 36,738 psi | 58% | 2989 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 41,466 psi | 65% | 3041 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 54,172 psi | 85% | 3176 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,513 psi | 71% | 3061 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,466 psi | 65% | 3035 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 90% | 41,060 psi | 64% | 3015 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 52,620 psi | 82% | 3179 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,017 psi | 64% | 3035 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,169 psi | 50% | 2858 fps | 96.6% |
| Vihtavuori N560 | 77.7 gr | 94% | 51,779 psi | 81% | 3353 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 98% | 47,776 psi | 75% | 3248 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,828 psi | 64% | 2999 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,656 psi | 67% | 3104 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,628 psi | 40% | 2730 fps | 95.1% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,903 psi | 69% | 3087 fps | 95.5% |
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 87 powders for 7 x 66 SE v. Hofe loaded with the .284 | 120gr | Hornady V-MAX. Alliant Reloder-26 delivers the highest muzzle velocity at 3,488 fps; across all powders the maximum-charge window runs from 2,129 fps to 3,488 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 87 of the 87 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 120.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 120gr | Hornady V-MAX 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.