Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 145gr | Fox Classic Hunter bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Ramshot Grand, Accurate MAGPRO 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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 56,014 psi | 88% | 3068 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,638 psi | 90% | 3110 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,940 psi | 86% | 3169 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 82% | 55,288 psi | 87% | 3015 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,897 psi | 86% | 3110 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 96% | 56,420 psi | 88% | 3173 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,021 psi | 74% | 2992 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,829 psi | 66% | 2946 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,143 psi | 86% | 3107 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,434 psi | 88% | 3035 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,114 psi | 86% | 3117 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,202 psi | 88% | 3130 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,418 psi | 85% | 3097 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,159 psi | 88% | 3166 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,188 psi | 90% | 3133 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 3136 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 53,722 psi | 84% | 3169 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,056 psi | 86% | 3146 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 57,479 psi | 90% | 3054 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,907 psi | 77% | 3068 fps | 98% |
| Bofors RP5 | <<locked>> | 96% | 56,159 psi | 88% | 3166 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 56,652 psi | 89% | 3054 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 3091 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 82% | 57,682 psi | 90% | 3081 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,869 psi | 88% | 3110 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 55,085 psi | 86% | 3068 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 94% | 56,579 psi | 89% | 3114 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,288 psi | 87% | 3091 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,259 psi | 87% | 3031 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,924 psi | 81% | 3209 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 86% | 56,362 psi | 88% | 3150 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1936 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,650 psi | 86% | 3038 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,708 psi | 86% | 3025 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 54,404 psi | 85% | 3045 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,392 psi | 90% | 3091 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 96% | 54,273 psi | 85% | 3150 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 55,158 psi | 86% | 3022 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,797 psi | 89% | 3071 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 3028 fps | 100% |
| Norma 204 | <<locked>> | 88% | 55,767 psi | 87% | 3097 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 37,115 psi | 58% | 2854 fps | 96.8% |
| Norma MRP | <<locked>> | 94% | 56,072 psi | 88% | 3192 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 56,202 psi | 88% | 3094 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,926 psi | 86% | 3169 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 55,158 psi | 86% | 3097 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3159 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,681 psi | 59% | 1982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,348 psi | 90% | 3064 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,666 psi | 87% | 3114 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 53,954 psi | 85% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,246 psi | 88% | 3166 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,489 psi | 82% | 3205 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,340 psi | 74% | 3071 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 82% | 54,128 psi | 85% | 2999 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,173 psi | 88% | 3077 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 94% | 57,609 psi | 90% | 3146 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 86% | 56,652 psi | 89% | 3054 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,158 psi | 86% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,797 psi | 89% | 3071 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,898 psi | 88% | 3064 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,418 psi | 85% | 2871 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,360 psi | 85% | 2972 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,159 psi | 90% | 3140 fps | 99.5% |
| Somchem S355 | <<locked>> | 84% | 57,493 psi | 90% | 3048 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,114 psi | 85% | 3009 fps | 97.8% |
| Somchem S365 | <<locked>> | 90% | 56,333 psi | 88% | 3091 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,404 psi | 85% | 3058 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 55,259 psi | 87% | 2966 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,433 psi | 85% | 3028 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,566 psi | 90% | 3091 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 57,058 psi | 89% | 3087 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,637 psi | 87% | 3107 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,985 psi | 88% | 3186 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,535 psi | 87% | 3156 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,740 psi | 90% | 3038 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,869 psi | 88% | 3110 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,897 psi | 86% | 3222 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,244 psi | 85% | 3048 fps | 99.2% |
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% | 32,010 psi | 50% | 2585 fps | 96.2% |
| Accurate 4350 | <<locked>> | 80% | 43,468 psi | 68% | 2871 fps | 99.9% |
| Accurate MAGPRO | 70.7 gr | 88% | 44,222 psi | 69% | 2963 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 52,069 psi | 82% | 2963 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,073 psi | 61% | 2795 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 88% | 42,772 psi | 67% | 2910 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 96% | 40,988 psi | 64% | 2861 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 94% | 34,171 psi | 54% | 2746 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,782 psi | 58% | 2733 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,142 psi | 83% | 2986 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,090 psi | 66% | 2884 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,602 psi | 76% | 3009 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,146 psi | 61% | 2792 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,188 psi | 58% | 2785 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,922 psi | 48% | 2625 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,848 psi | 45% | 2579 fps | 95.2% |
| Alliant Reloder-26 | 65 gr | 80% | 33,779 psi | 53% | 2762 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 36,869 psi | 58% | 2776 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 53,809 psi | 84% | 2999 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 39,479 psi | 62% | 2871 fps | 95.4% |
| Bofors RP5 | <<locked>> | 84% | 37,188 psi | 58% | 2785 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 46,644 psi | 73% | 2881 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 39,320 psi | 62% | 2825 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 54,056 psi | 85% | 3022 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,469 psi | 71% | 2923 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 48,211 psi | 76% | 2943 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 42,743 psi | 67% | 2854 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,947 psi | 70% | 2900 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,537 psi | 62% | 2759 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,912 psi | 58% | 2861 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 44,962 psi | 70% | 2946 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,572 psi | 43% | 1732 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,250 psi | 66% | 2808 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,167 psi | 75% | 2910 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 41,669 psi | 65% | 2818 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,469 psi | 70% | 2854 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 88% | 41,075 psi | 64% | 2884 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 45,527 psi | 71% | 2854 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 43,888 psi | 69% | 2841 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 29,399 psi | 46% | 2513 fps | 95% |
| Norma 204 | <<locked>> | 80% | 42,134 psi | 66% | 2841 fps | 96.7% |
| Norma 217 | <<locked>> | 98% | 34,635 psi | 54% | 2789 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 33,736 psi | 53% | 2726 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 43,033 psi | 67% | 2864 fps | 99.8% |
| Ramshot Grand | 68.8 gr | 88% | 40,727 psi | 64% | 2890 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 41,872 psi | 66% | 2854 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 88% | 36,245 psi | 57% | 2756 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,152 psi | 44% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,824 psi | 84% | 3009 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,663 psi | 81% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,555 psi | 68% | 2890 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,047 psi | 66% | 2910 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,562 psi | 53% | 2759 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 43,656 psi | 68% | 2992 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,662 psi | 79% | 2946 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,582 psi | 64% | 2779 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 82% | 38,290 psi | 60% | 2772 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 46,644 psi | 73% | 2881 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,527 psi | 71% | 2854 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 43,888 psi | 69% | 2841 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,185 psi | 82% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,169 psi | 80% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,643 psi | 70% | 2799 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,956 psi | 59% | 2769 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 50,502 psi | 79% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,208 psi | 69% | 2825 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 39,798 psi | 62% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,245 psi | 57% | 2694 fps | 96% |
| Vihtavuori N150 | <<locked>> | 80% | 48,472 psi | 76% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,367 psi | 70% | 2854 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 35,969 psi | 56% | 2680 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 43,888 psi | 69% | 2861 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 34,751 psi | 54% | 2707 fps | 99% |
| Vihtavuori N560 | <<locked>> | 86% | 42,134 psi | 66% | 2917 fps | 95% |
| Vihtavuori N565 | <<locked>> | 92% | 41,930 psi | 66% | 2897 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,555 psi | 68% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,658 psi | 72% | 2930 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,325 psi | 43% | 2621 fps | 99% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,072 psi | 60% | 2736 fps | 95.6% |
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 | 145gr | Fox Classic Hunter. Winchester StaBALL HD delivers the highest muzzle velocity at 3,222 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,222 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 145.0 gr projectile in 0.284" calls for a 1:10.0 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. Ramshot Grand, Accurate MAGPRO, Alliant Reloder-26 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 145gr | Fox Classic Hunter 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.