Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 140gr | Ferrobull Tripple Expand Jagd bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand and Accurate High Country.
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% | 56,231 psi | 88% | 3120 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,725 psi | 90% | 3163 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,085 psi | 85% | 3219 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 94% | 55,245 psi | 87% | 3222 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 55,463 psi | 87% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,042 psi | 86% | 3163 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 56,565 psi | 89% | 3225 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,282 psi | 74% | 3041 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,989 psi | 66% | 2995 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,259 psi | 87% | 3159 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,259 psi | 87% | 3159 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,594 psi | 89% | 3094 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,998 psi | 86% | 3169 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,275 psi | 88% | 3186 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,578 psi | 86% | 3153 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,347 psi | 88% | 3222 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,421 psi | 90% | 3189 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3192 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,070 psi | 85% | 3225 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,463 psi | 87% | 3205 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,950 psi | 77% | 3117 fps | 97.9% |
| Bofors RP5 | <<locked>> | 96% | 56,347 psi | 88% | 3222 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 56,623 psi | 89% | 3110 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,272 psi | 82% | 3143 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 82% | 57,696 psi | 90% | 3133 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,941 psi | 88% | 3163 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 55,027 psi | 86% | 3120 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 56,492 psi | 89% | 3159 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,535 psi | 87% | 3143 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,347 psi | 87% | 3087 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,141 psi | 82% | 3264 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 56,608 psi | 89% | 3205 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,898 psi | 58% | 1982 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,708 psi | 86% | 3091 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,723 psi | 86% | 3081 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 54,520 psi | 85% | 3100 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,667 psi | 90% | 3146 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 54,447 psi | 85% | 3205 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 55,143 psi | 86% | 3074 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,884 psi | 89% | 3127 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,519 psi | 84% | 3081 fps | 100% |
| Norma 204 | <<locked>> | 88% | 55,695 psi | 87% | 3150 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 37,362 psi | 59% | 2904 fps | 96.6% |
| Norma MRP | <<locked>> | 94% | 56,434 psi | 88% | 3245 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 56,304 psi | 88% | 3146 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,940 psi | 86% | 3219 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 55,056 psi | 86% | 3150 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3215 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,637 psi | 59% | 2028 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,493 psi | 90% | 3120 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,840 psi | 88% | 3173 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,157 psi | 85% | 3130 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,550 psi | 89% | 3225 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,678 psi | 83% | 3255 fps | 100% |
| Rottweil R 903 | <<locked>> | 82% | 54,259 psi | 85% | 3054 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,362 psi | 88% | 3133 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 94% | 57,696 psi | 90% | 3199 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 56,623 psi | 89% | 3110 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,143 psi | 86% | 3074 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,884 psi | 89% | 3127 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,840 psi | 88% | 3117 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,433 psi | 85% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,505 psi | 85% | 3025 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,246 psi | 90% | 3196 fps | 99.5% |
| Somchem S355 | <<locked>> | 84% | 57,566 psi | 90% | 3104 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,288 psi | 85% | 3061 fps | 97.6% |
| Somchem S365 | <<locked>> | 90% | 56,623 psi | 89% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,447 psi | 85% | 3107 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 55,303 psi | 87% | 3018 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,534 psi | 85% | 3084 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,027 psi | 85% | 3087 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 57,290 psi | 90% | 3143 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,753 psi | 87% | 3159 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,333 psi | 88% | 3241 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,666 psi | 87% | 3209 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,012 psi | 85% | 3035 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,188 psi | 88% | 3169 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,216 psi | 87% | 3278 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,433 psi | 85% | 3100 fps | 99.1% |
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>> | 80% | 32,155 psi | 50% | 2631 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 43,613 psi | 68% | 2920 fps | 99.8% |
| Accurate High Country | 69.7 gr | 86% | 43,729 psi | 69% | 3015 fps | 96.1% |
| Accurate MAGPRO | 74.3 gr | 90% | 47,747 psi | 75% | 3084 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 52,098 psi | 82% | 3018 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,160 psi | 61% | 2844 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 88% | 43,004 psi | 67% | 2963 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 96% | 41,162 psi | 65% | 2907 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 34,345 psi | 54% | 2792 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 39,610 psi | 62% | 2848 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 39,610 psi | 62% | 2848 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,113 psi | 83% | 3041 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,090 psi | 66% | 2933 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,602 psi | 76% | 3061 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,204 psi | 61% | 2841 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,159 psi | 58% | 2828 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,082 psi | 49% | 2667 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,966 psi | 49% | 2684 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,895 psi | 53% | 2805 fps | 98.1% |
| Bofors RP15 | <<locked>> | 88% | 39,581 psi | 62% | 2887 fps | 95.8% |
| Bofors RP30 | <<locked>> | 94% | 39,697 psi | 62% | 2920 fps | 95.2% |
| Bofors RP5 | <<locked>> | 84% | 37,159 psi | 58% | 2828 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 46,833 psi | 73% | 2933 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 39,378 psi | 62% | 2871 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 54,143 psi | 85% | 3077 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,542 psi | 71% | 2976 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 48,298 psi | 76% | 2999 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 45,948 psi | 72% | 2966 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,136 psi | 71% | 2949 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,595 psi | 62% | 2808 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,028 psi | 58% | 2907 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 45,194 psi | 71% | 2999 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 43% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,380 psi | 66% | 2858 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,356 psi | 76% | 2963 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 41,655 psi | 65% | 2864 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,614 psi | 70% | 2904 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 44,121 psi | 69% | 2999 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 45,730 psi | 72% | 2907 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 43,859 psi | 69% | 2887 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 31,546 psi | 49% | 2615 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 42,163 psi | 66% | 2887 fps | 96.4% |
| Norma 217 | <<locked>> | 98% | 34,766 psi | 54% | 2831 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 33,765 psi | 53% | 2769 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 43,004 psi | 67% | 2910 fps | 99.7% |
| Ramshot Grand | 70.7 gr | 88% | 40,872 psi | 64% | 2936 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 41,916 psi | 66% | 2900 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 36,318 psi | 57% | 2802 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 44% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,824 psi | 84% | 3061 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,663 psi | 81% | 3110 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,743 psi | 69% | 2943 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,177 psi | 66% | 2959 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,736 psi | 53% | 2805 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 50,618 psi | 79% | 2995 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,410 psi | 68% | 2887 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 38,377 psi | 60% | 2822 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 46,833 psi | 73% | 2933 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,730 psi | 72% | 2907 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 43,859 psi | 69% | 2887 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,228 psi | 82% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,068 psi | 80% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,570 psi | 70% | 2844 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,043 psi | 60% | 2815 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 50,720 psi | 79% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,382 psi | 70% | 2874 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 39,943 psi | 63% | 2864 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,318 psi | 57% | 2740 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 48,443 psi | 76% | 2913 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,498 psi | 70% | 2907 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 35,969 psi | 56% | 2723 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 43,961 psi | 69% | 2910 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 34,766 psi | 54% | 2749 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 45,426 psi | 71% | 3035 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 92% | 42,163 psi | 66% | 2946 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,642 psi | 68% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,759 psi | 72% | 2979 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,383 psi | 43% | 2661 fps | 98.7% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,203 psi | 60% | 2782 fps | 95.4% |
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 79 powders for 7 x 66 SE v. Hofe loaded with the .284 | 140gr | Ferrobull Tripple Expand Jagd. Winchester StaBALL HD delivers the highest muzzle velocity at 3,278 fps; across all powders the maximum-charge window runs from 1,982 fps to 3,278 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 140.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Accurate MAGPRO, Ramshot Grand, Accurate High Country rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 140gr | Ferrobull Tripple Expand Jagd 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.