Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 150gr | Norma Soft Point bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Hodgdon Retumbo and Winchester StaBALL HD.
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>> | 92% | 54,230 psi | 85% | 2995 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,230 psi | 87% | 3028 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,753 psi | 87% | 3153 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 92% | 56,797 psi | 89% | 3156 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 90% | 56,202 psi | 88% | 3091 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 53,969 psi | 85% | 3094 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,098 psi | 82% | 3054 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,499 psi | 73% | 3012 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,362 psi | 88% | 3087 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,348 psi | 90% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,782 psi | 87% | 3081 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,201 psi | 85% | 3091 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,550 psi | 87% | 3061 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,940 psi | 86% | 3123 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,159 psi | 88% | 3153 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,535 psi | 87% | 3051 fps | 96.7% |
| Bofors RP15 | <<locked>> | 96% | 56,869 psi | 89% | 3133 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 3127 fps | 99.3% |
| Bofors RP5 | <<locked>> | 92% | 54,201 psi | 85% | 3091 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 57,232 psi | 90% | 3025 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 3146 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 56,985 psi | 89% | 3084 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,738 psi | 87% | 3038 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 57,638 psi | 90% | 3091 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,434 psi | 88% | 3074 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,434 psi | 88% | 3002 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,609 psi | 90% | 3264 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,609 psi | 90% | 3123 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,304 psi | 58% | 1926 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,434 psi | 87% | 3012 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,143 psi | 86% | 2995 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,709 psi | 87% | 3022 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,853 psi | 86% | 3012 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 94% | 55,695 psi | 87% | 3133 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,090 psi | 66% | 2907 fps | 96.8% |
| Lovex S065 | <<locked>> | 84% | 55,956 psi | 88% | 2992 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,172 psi | 85% | 2992 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,637 psi | 87% | 3018 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,550 psi | 89% | 3074 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 42,264 psi | 66% | 2936 fps | 98.8% |
| Norma MRP | <<locked>> | 90% | 53,983 psi | 85% | 3110 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,392 psi | 90% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,710 psi | 89% | 3159 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 56,188 psi | 88% | 3071 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,882 psi | 86% | 3084 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,145 psi | 60% | 1972 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,390 psi | 87% | 3051 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,667 psi | 90% | 3140 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,621 psi | 86% | 3196 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 3150 fps | 98.3% |
| Rottweil R 904 | <<locked>> | 90% | 57,290 psi | 90% | 3058 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 55,201 psi | 87% | 3064 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 57,232 psi | 90% | 3025 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,956 psi | 88% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,172 psi | 85% | 2992 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,114 psi | 86% | 2946 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,781 psi | 86% | 3061 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 55,114 psi | 86% | 2989 fps | 98.4% |
| Somchem S365 | <<locked>> | 86% | 54,273 psi | 85% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,666 psi | 87% | 3038 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 56,057 psi | 88% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,303 psi | 87% | 2999 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,376 psi | 87% | 3018 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 54,679 psi | 86% | 3005 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,711 psi | 90% | 3091 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,740 psi | 90% | 3173 fps | 99% |
| Vihtavuori N565 | <<locked>> | 98% | 57,667 psi | 90% | 3150 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3150 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,940 psi | 86% | 2953 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,985 psi | 89% | 3084 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 53,722 psi | 84% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,695 psi | 87% | 3035 fps | 99.6% |
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% | 36,187 psi | 57% | 2651 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 48,269 psi | 76% | 2913 fps | 100% |
| Accurate High Country | 65.5 gr | 80% | 39,204 psi | 61% | 2818 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 84% | 42,743 psi | 67% | 2887 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 40,219 psi | 63% | 2782 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 41,162 psi | 65% | 2838 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 92% | 39,639 psi | 62% | 2795 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 88% | 31,473 psi | 49% | 2631 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,209 psi | 72% | 2920 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,534 psi | 84% | 3041 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,190 psi | 63% | 2779 fps | 96.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,114 psi | 57% | 2720 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,708 psi | 54% | 2677 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,240 psi | 47% | 2585 fps | 96.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,334 psi | 60% | 2828 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,081 psi | 77% | 2930 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 35,969 psi | 56% | 2713 fps | 95.4% |
| Bofors RP30 | <<locked>> | 90% | 38,928 psi | 61% | 2815 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 36,114 psi | 57% | 2720 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 50,444 psi | 79% | 2913 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 38,014 psi | 60% | 2759 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 49,734 psi | 78% | 2963 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 52,257 psi | 82% | 2982 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 40,973 psi | 64% | 2779 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,163 psi | 68% | 2825 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,642 psi | 68% | 2795 fps | 100% |
| Hodgdon Retumbo | 66.3 gr | 84% | 33,649 psi | 53% | 2730 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,647 psi | 78% | 2992 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 44% | 1722 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,992 psi | 72% | 2844 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,953 psi | 81% | 2940 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 45,818 psi | 72% | 2854 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,987 psi | 63% | 2720 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 39,508 psi | 62% | 2812 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,407 psi | 62% | 2848 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 49,385 psi | 77% | 2887 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,776 psi | 75% | 2877 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 31,212 psi | 49% | 2523 fps | 96.5% |
| Norma 204 | <<locked>> | 80% | 46,253 psi | 72% | 2887 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 32,242 psi | 51% | 2680 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 37,782 psi | 59% | 2789 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 47,137 psi | 74% | 2897 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,233 psi | 61% | 2818 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 46,122 psi | 72% | 2897 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 32,619 psi | 51% | 2625 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,601 psi | 45% | 1765 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,254 psi | 76% | 2933 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,456 psi | 73% | 2956 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,851 psi | 51% | 2707 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,728 psi | 67% | 2933 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 41,437 psi | 65% | 2762 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 80% | 39,552 psi | 62% | 2762 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 50,444 psi | 79% | 2913 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,385 psi | 77% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,776 psi | 75% | 2877 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,341 psi | 76% | 2831 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,218 psi | 61% | 2759 fps | 96.8% |
| Somchem S361 | <<locked>> | 80% | 42,192 psi | 66% | 2746 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 44,425 psi | 70% | 2854 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,176 psi | 63% | 2746 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 52,489 psi | 82% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,602 psi | 76% | 2890 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,824 psi | 55% | 2612 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 48,008 psi | 75% | 2897 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,044 psi | 61% | 2759 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 40,756 psi | 64% | 2844 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 88% | 41,118 psi | 64% | 2838 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 94% | 44,005 psi | 69% | 2946 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,790 psi | 75% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,951 psi | 78% | 2969 fps | 99.7% |
| Winchester StaBALL HD | 64.9 gr | 80% | 31,067 psi | 49% | 2707 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,637 psi | 57% | 2664 fps | 95.8% |
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 72 powders for 7 x 66 SE v. Hofe loaded with the .284 | 150gr | Norma Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 3,264 fps; across all powders the maximum-charge window runs from 1,926 fps to 3,264 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 150.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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 High Country, Hodgdon Retumbo, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 150gr | Norma Soft Point 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.