Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 130gr | NorthFork Bonded Core bullet and 76 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 ADI AR 2213.
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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,274 psi | 87% | 3199 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 56,608 psi | 89% | 3248 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,766 psi | 84% | 3287 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 82% | 54,433 psi | 85% | 3156 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,493 psi | 90% | 3301 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 55,216 psi | 87% | 3297 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,147 psi | 64% | 3051 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,753 psi | 87% | 3182 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,493 psi | 90% | 3310 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,868 psi | 86% | 3264 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,913 psi | 89% | 3284 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,998 psi | 86% | 3294 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,985 psi | 88% | 3271 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,706 psi | 81% | 3264 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,710 psi | 89% | 3366 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,725 psi | 90% | 3337 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 56,739 psi | 89% | 3199 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,659 psi | 75% | 3182 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 54,998 psi | 86% | 3294 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 55,767 psi | 87% | 3189 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,966 psi | 80% | 3205 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 56,826 psi | 89% | 3219 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,723 psi | 86% | 3241 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 57,609 psi | 90% | 3258 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 55,259 psi | 87% | 3232 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,056 psi | 85% | 3209 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,157 psi | 85% | 3169 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,720 psi | 79% | 3323 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 55,245 psi | 87% | 3278 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 58% | 2054 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,305 psi | 90% | 3189 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,232 psi | 90% | 3228 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,188 psi | 90% | 3215 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 56,898 psi | 89% | 3235 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,434 psi | 88% | 3215 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 56,695 psi | 89% | 3337 fps | 98.2% |
| Lovex S065 | <<locked>> | 88% | 57,725 psi | 90% | 3212 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,927 psi | 88% | 3209 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,663 psi | 83% | 3156 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 54,650 psi | 86% | 3225 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 54,723 psi | 86% | 3317 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 55,172 psi | 86% | 3228 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,711 psi | 90% | 3360 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 57,696 psi | 90% | 3291 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,898 psi | 88% | 3284 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,594 psi | 59% | 2100 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,536 psi | 89% | 3199 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,360 psi | 85% | 3255 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,652 psi | 89% | 3268 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,897 psi | 86% | 3297 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,314 psi | 80% | 3320 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 57,043 psi | 89% | 3199 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,129 psi | 86% | 3202 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 56,478 psi | 89% | 3274 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 55,767 psi | 87% | 3189 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,725 psi | 90% | 3212 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,927 psi | 88% | 3209 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,810 psi | 86% | 3202 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,000 psi | 89% | 3061 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,319 psi | 90% | 3163 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,028 psi | 88% | 3271 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 56,521 psi | 89% | 3189 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,072 psi | 89% | 3196 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 55,201 psi | 87% | 3232 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,956 psi | 89% | 3241 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 54,447 psi | 85% | 3107 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,956 psi | 89% | 3219 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,579 psi | 89% | 3219 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 56,144 psi | 88% | 3222 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,708 psi | 86% | 3245 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,650 psi | 86% | 3307 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3281 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,768 psi | 89% | 3173 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,969 psi | 86% | 3245 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,305 psi | 90% | 3415 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,130 psi | 90% | 3238 fps | 99% |
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 3100 | <<locked>> | 82% | 34,200 psi | 54% | 2762 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 42,917 psi | 67% | 2995 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 49,980 psi | 78% | 3215 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 51,213 psi | 80% | 3100 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,133 psi | 64% | 2972 fps | 95.4% |
| ADI AR 2213 | 71.5 gr | 90% | 45,107 psi | 71% | 3091 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 36,056 psi | 56% | 2913 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,228 psi | 82% | 3123 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,220 psi | 65% | 3005 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,514 psi | 74% | 3140 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,133 psi | 64% | 2969 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,930 psi | 66% | 3031 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,647 psi | 48% | 2736 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,663 psi | 51% | 2812 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,330 psi | 52% | 2871 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 41,408 psi | 65% | 3015 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 53,055 psi | 83% | 3140 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,553 psi | 65% | 3048 fps | 95% |
| Bofors RP5 | <<locked>> | 88% | 41,930 psi | 66% | 3031 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 46,151 psi | 72% | 3009 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 94% | 41,539 psi | 65% | 2999 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 53,185 psi | 83% | 3159 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,802 psi | 70% | 3048 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 47,355 psi | 74% | 3068 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 48,182 psi | 76% | 3100 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,340 psi | 74% | 3084 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,856 psi | 61% | 2881 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,870 psi | 61% | 3035 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 44,135 psi | 69% | 3068 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,572 psi | 43% | 1837 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,838 psi | 84% | 3136 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,640 psi | 65% | 2927 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,529 psi | 74% | 3038 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 40,973 psi | 64% | 2936 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,615 psi | 73% | 3031 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 46,238 psi | 72% | 3130 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,107 psi | 71% | 2982 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 43,439 psi | 68% | 2966 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 33,446 psi | 52% | 2746 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 41,481 psi | 65% | 2959 fps | 95.4% |
| Norma MRP | 67.2 gr | 82% | 35,679 psi | 56% | 2904 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 42,409 psi | 66% | 2986 fps | 99.3% |
| Ramshot Grand | <<locked>> | 90% | 43,105 psi | 68% | 3071 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 41,220 psi | 65% | 2972 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 38,377 psi | 60% | 2930 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 44% | 1883 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,011 psi | 83% | 3140 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,401 psi | 79% | 3192 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,830 psi | 67% | 3015 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,191 psi | 65% | 3025 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,781 psi | 56% | 2936 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 50,096 psi | 79% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,513 psi | 71% | 3018 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 40,364 psi | 63% | 2949 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,151 psi | 72% | 3009 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,107 psi | 71% | 2982 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 43,439 psi | 68% | 2966 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,329 psi | 80% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,314 psi | 79% | 2963 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,193 psi | 69% | 2923 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,016 psi | 63% | 2946 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 49,966 psi | 78% | 3077 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,731 psi | 73% | 3005 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 39,102 psi | 61% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,319 psi | 60% | 2871 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 47,863 psi | 75% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,656 psi | 68% | 2982 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 37,956 psi | 59% | 2851 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,192 psi | 68% | 2982 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 34,258 psi | 54% | 2822 fps | 98.2% |
| Vihtavuori N560 | 73.8 gr | 90% | 47,659 psi | 75% | 3169 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 47,500 psi | 74% | 3146 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,815 psi | 67% | 2940 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,802 psi | 70% | 3048 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,209 psi | 43% | 2720 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,277 psi | 63% | 2913 fps | 95.2% |
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 76 powders for 7 x 66 SE v. Hofe loaded with the .284 | 130gr | NorthFork Bonded Core. Winchester StaBALL HD delivers the highest muzzle velocity at 3,415 fps; across all powders the maximum-charge window runs from 2,054 fps to 3,415 fps. ADI AR 2225 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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, ADI AR 2213 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 130gr | NorthFork Bonded Core 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.