Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 135gr | Reichenberg Spezial Jagd bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Winchester StaBALL HD and IMR 7828 SSC.
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>> | 94% | 54,331 psi | 85% | 3140 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,477 psi | 87% | 3179 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,767 psi | 87% | 3294 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 94% | 56,695 psi | 89% | 3294 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 56,463 psi | 88% | 3140 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,391 psi | 88% | 3235 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 54,128 psi | 85% | 3235 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,573 psi | 76% | 3114 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,323 psi | 68% | 3068 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,594 psi | 89% | 3232 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,594 psi | 89% | 3232 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,391 psi | 88% | 3241 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,667 psi | 90% | 3258 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,883 psi | 88% | 3222 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,143 psi | 85% | 3232 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,216 psi | 87% | 3209 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 3264 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,753 psi | 87% | 3301 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,768 psi | 89% | 3274 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,720 psi | 79% | 3196 fps | 98% |
| Bofors RP5 | <<locked>> | 94% | 54,143 psi | 85% | 3232 fps | 99% |
| Bofors RP7 | <<locked>> | 84% | 54,433 psi | 85% | 3123 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 3215 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 86% | 57,246 psi | 90% | 3238 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 56,101 psi | 88% | 3189 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 92% | 54,143 psi | 85% | 3169 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,724 psi | 89% | 3215 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,724 psi | 89% | 3156 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,490 psi | 84% | 3337 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 84% | 53,867 psi | 84% | 3209 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,014 psi | 58% | 2028 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,927 psi | 88% | 3159 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,782 psi | 87% | 3150 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 55,782 psi | 87% | 3166 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,216 psi | 87% | 3156 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 55,666 psi | 87% | 3274 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 56,434 psi | 88% | 3146 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,694 psi | 86% | 3140 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,230 psi | 87% | 3153 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,072 psi | 89% | 3222 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 38,914 psi | 61% | 2986 fps | 96.9% |
| Norma MRP | <<locked>> | 92% | 53,969 psi | 85% | 3255 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 57,479 psi | 90% | 3215 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,652 psi | 89% | 3297 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 56,492 psi | 89% | 3222 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,824 psi | 86% | 3222 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 59% | 2073 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,072 psi | 89% | 3241 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,564 psi | 87% | 3202 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,824 psi | 84% | 3232 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,288 psi | 85% | 3330 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 3196 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 82% | 55,637 psi | 87% | 3127 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,667 psi | 90% | 3202 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 55,274 psi | 87% | 3209 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 54,433 psi | 85% | 3123 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,434 psi | 88% | 3146 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,694 psi | 86% | 3140 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,276 psi | 90% | 3189 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,593 psi | 87% | 2992 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,869 psi | 88% | 3097 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,824 psi | 86% | 3202 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 55,303 psi | 87% | 3120 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,695 psi | 87% | 3130 fps | 97.7% |
| Somchem S365 | <<locked>> | 88% | 54,259 psi | 85% | 3166 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,912 psi | 88% | 3179 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 56,623 psi | 89% | 3091 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,724 psi | 87% | 3153 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,506 psi | 87% | 3156 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 86% | 54,984 psi | 86% | 3156 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,508 psi | 90% | 3238 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 53,795 psi | 84% | 3245 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,377 psi | 90% | 3284 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,259 psi | 87% | 3104 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,493 psi | 90% | 3241 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,898 psi | 89% | 3350 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,941 psi | 88% | 3176 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% | 33,605 psi | 53% | 2707 fps | 96.3% |
| Accurate 4350 | <<locked>> | 80% | 45,121 psi | 71% | 2995 fps | 99.9% |
| Accurate High Country | 69.9 gr | 84% | 41,930 psi | 66% | 3015 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 90% | 49,139 psi | 77% | 3156 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 52,968 psi | 83% | 3084 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,364 psi | 63% | 2917 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 88% | 44,150 psi | 69% | 3031 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 96% | 42,540 psi | 67% | 2982 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 35,592 psi | 56% | 2864 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,640 psi | 64% | 2913 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,640 psi | 64% | 2913 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,250 psi | 68% | 3005 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,879 psi | 78% | 3133 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,248 psi | 63% | 2907 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,435 psi | 60% | 2904 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,184 psi | 50% | 2740 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,124 psi | 47% | 2694 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,244 psi | 55% | 2884 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 38,261 psi | 60% | 2897 fps | 95.1% |
| Bofors RP30 | <<locked>> | 94% | 41,162 psi | 65% | 2995 fps | 95.5% |
| Bofors RP5 | <<locked>> | 84% | 38,435 psi | 60% | 2904 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 47,834 psi | 75% | 3002 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 40,611 psi | 64% | 2940 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 46,847 psi | 73% | 3048 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 49,313 psi | 77% | 3064 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 47,137 psi | 74% | 3038 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,325 psi | 73% | 3022 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,698 psi | 64% | 2877 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,247 psi | 60% | 2982 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 46,470 psi | 73% | 3068 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,659 psi | 43% | 1814 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,453 psi | 68% | 2923 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,342 psi | 77% | 3031 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 42,946 psi | 67% | 2936 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,600 psi | 71% | 2972 fps | 95.6% |
| IMR 7828 SSC | 70.5 gr | 88% | 42,337 psi | 66% | 3002 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 46,789 psi | 73% | 2976 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 45,121 psi | 71% | 2959 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 30,966 psi | 49% | 2635 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 43,366 psi | 68% | 2963 fps | 96.6% |
| Norma 217 | <<locked>> | 98% | 36,318 psi | 57% | 2917 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 35,056 psi | 55% | 2844 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 44,251 psi | 69% | 2982 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 42,105 psi | 66% | 3009 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 43,178 psi | 68% | 2972 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 37,724 psi | 59% | 2874 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 44% | 1857 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,997 psi | 83% | 3182 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,150 psi | 71% | 3018 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,352 psi | 68% | 3031 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,041 psi | 55% | 2881 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 45,614 psi | 71% | 3120 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 52,083 psi | 82% | 3071 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,698 psi | 65% | 2894 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 39,537 psi | 62% | 2890 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 47,834 psi | 75% | 3002 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,789 psi | 73% | 2976 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 45,121 psi | 71% | 2959 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,490 psi | 84% | 3130 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,257 psi | 82% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,919 psi | 72% | 2917 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,204 psi | 61% | 2884 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 51,851 psi | 81% | 3064 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,556 psi | 71% | 2943 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 41,307 psi | 65% | 2936 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,579 psi | 59% | 2812 fps | 96% |
| Vihtavuori N150 | <<locked>> | 80% | 49,661 psi | 78% | 2982 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,687 psi | 72% | 2976 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 37,173 psi | 58% | 2792 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 45,121 psi | 71% | 2979 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 36,245 psi | 57% | 2828 fps | 99% |
| Vihtavuori N560 | <<locked>> | 86% | 43,584 psi | 68% | 3038 fps | 95% |
| Vihtavuori N565 | <<locked>> | 92% | 43,671 psi | 68% | 3022 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,918 psi | 70% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,036 psi | 74% | 3051 fps | 98.9% |
| Winchester StaBALL HD | 65.9 gr | 80% | 28,674 psi | 45% | 2743 fps | 99% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,378 psi | 62% | 2851 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 77 powders for 7 x 66 SE v. Hofe loaded with the .284 | 135gr | Reichenberg Spezial Jagd. Winchester StaBALL HD delivers the highest muzzle velocity at 3,350 fps; across all powders the maximum-charge window runs from 2,028 fps to 3,350 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 135.0 gr projectile in 0.284" calls for a 1:13.0 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. Accurate High Country, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 135gr | Reichenberg Spezial 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.