Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 139gr | Reichenberg HDB Universal bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, IMR 7828 SSC and Norma MRP.
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% | 54,215 psi | 85% | 3094 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,376 psi | 87% | 3133 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 56,608 psi | 89% | 3255 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 82% | 56,362 psi | 88% | 3094 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,217 psi | 88% | 3189 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 96% | 57,740 psi | 90% | 3255 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 3074 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,236 psi | 68% | 3028 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,434 psi | 88% | 3189 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,246 psi | 88% | 3196 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,638 psi | 90% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,738 psi | 87% | 3179 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,638 psi | 90% | 3248 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,114 psi | 86% | 3163 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,375 psi | 85% | 3222 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,593 psi | 87% | 3255 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,043 psi | 88% | 3146 fps | 95.8% |
| Bofors RP15 | <<locked>> | 98% | 56,782 psi | 89% | 3235 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,575 psi | 79% | 3153 fps | 98.2% |
| Bofors RP5 | <<locked>> | 96% | 57,638 psi | 90% | 3248 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 54,418 psi | 85% | 3081 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,432 psi | 84% | 3173 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 86% | 57,203 psi | 90% | 3192 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 56,188 psi | 88% | 3146 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 94% | 57,653 psi | 90% | 3189 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,710 psi | 89% | 3173 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,652 psi | 89% | 3114 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,447 psi | 84% | 3297 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 53,780 psi | 84% | 3166 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,985 psi | 58% | 1988 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,869 psi | 88% | 3117 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,825 psi | 87% | 3104 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 55,666 psi | 87% | 3123 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,085 psi | 86% | 3110 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 96% | 55,651 psi | 87% | 3232 fps | 98.6% |
| Lovex S065 | <<locked>> | 86% | 56,449 psi | 88% | 3104 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,578 psi | 86% | 3094 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,216 psi | 87% | 3110 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,869 psi | 89% | 3176 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 38,783 psi | 61% | 2946 fps | 97.1% |
| Norma MRP | <<locked>> | 92% | 53,708 psi | 84% | 3209 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 57,392 psi | 90% | 3173 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,260 psi | 88% | 3248 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 56,333 psi | 88% | 3176 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,636 psi | 86% | 3176 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 59% | 2034 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,971 psi | 89% | 3196 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,361 psi | 87% | 3156 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,708 psi | 84% | 3186 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3291 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,139 psi | 77% | 3156 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 55,579 psi | 87% | 3081 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,508 psi | 90% | 3159 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 92% | 55,332 psi | 87% | 3169 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 54,418 psi | 85% | 3081 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,449 psi | 88% | 3104 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,578 psi | 86% | 3094 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,130 psi | 90% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,376 psi | 87% | 2946 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,753 psi | 87% | 3051 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,882 psi | 86% | 3163 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 55,230 psi | 87% | 3074 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,463 psi | 87% | 3087 fps | 97.8% |
| Somchem S365 | <<locked>> | 88% | 54,186 psi | 85% | 3120 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,825 psi | 87% | 3136 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 56,608 psi | 89% | 3048 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,593 psi | 87% | 3107 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,259 psi | 87% | 3114 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 54,940 psi | 86% | 3114 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,334 psi | 90% | 3192 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,609 psi | 90% | 3271 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,348 psi | 90% | 3245 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,285 psi | 79% | 3166 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,187 psi | 86% | 3061 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,450 psi | 90% | 3196 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,826 psi | 89% | 3307 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,695 psi | 87% | 3130 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% | 33,562 psi | 53% | 2674 fps | 96.5% |
| Accurate 4350 | <<locked>> | 80% | 45,034 psi | 71% | 2953 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 88% | 45,614 psi | 71% | 3045 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 53,011 psi | 83% | 3038 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,637 psi | 59% | 2812 fps | 95% |
| ADI AR 2213 | <<locked>> | 88% | 43,961 psi | 69% | 2989 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 96% | 42,293 psi | 66% | 2943 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 92% | 33,257 psi | 52% | 2762 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,913 psi | 59% | 2812 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,134 psi | 68% | 2959 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,937 psi | 78% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,594 psi | 59% | 2805 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,464 psi | 60% | 2867 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,256 psi | 51% | 2707 fps | 99.2% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,095 psi | 47% | 2661 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,157 psi | 55% | 2844 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,765 psi | 83% | 3084 fps | 95% |
| Bofors RP15 | <<locked>> | 86% | 38,116 psi | 60% | 2858 fps | 95.2% |
| Bofors RP30 | <<locked>> | 94% | 41,089 psi | 64% | 2956 fps | 95.7% |
| Bofors RP5 | <<locked>> | 84% | 38,464 psi | 60% | 2867 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 47,906 psi | 75% | 2959 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 40,538 psi | 64% | 2904 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 46,818 psi | 73% | 3005 fps | 99% |
| Hodgdon H4350 | <<locked>> | 80% | 49,284 psi | 77% | 3022 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 43,976 psi | 69% | 2933 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,122 psi | 72% | 2979 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,741 psi | 64% | 2838 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,101 psi | 60% | 2943 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 46,267 psi | 73% | 3025 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 43% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,366 psi | 68% | 2884 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,255 psi | 77% | 2989 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 42,859 psi | 67% | 2894 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,672 psi | 72% | 2933 fps | 95.8% |
| IMR 7828 SSC | 69 gr | 88% | 42,293 psi | 66% | 2963 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 46,833 psi | 73% | 2933 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 45,194 psi | 71% | 2923 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 30,850 psi | 48% | 2598 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 43,366 psi | 68% | 2920 fps | 96.7% |
| Norma 217 | <<locked>> | 98% | 36,143 psi | 57% | 2877 fps | 96% |
| Norma MRP | 65.2 gr | 80% | 35,085 psi | 55% | 2808 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 44,324 psi | 69% | 2943 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 42,148 psi | 66% | 2972 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 43,178 psi | 68% | 2936 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 86% | 34,911 psi | 55% | 2766 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,210 psi | 44% | 1821 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,026 psi | 83% | 3136 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,005 psi | 71% | 2972 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,236 psi | 68% | 2989 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,983 psi | 55% | 2848 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 45,484 psi | 71% | 3084 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 52,170 psi | 82% | 3028 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,655 psi | 65% | 2854 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 36,985 psi | 58% | 2789 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 47,906 psi | 75% | 2959 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,833 psi | 73% | 2933 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 45,194 psi | 71% | 2923 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,476 psi | 84% | 3087 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,025 psi | 82% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,876 psi | 72% | 2877 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,160 psi | 61% | 2848 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 51,924 psi | 81% | 3022 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,353 psi | 71% | 2900 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 41,176 psi | 65% | 2894 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,521 psi | 59% | 2772 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 80% | 49,748 psi | 78% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,614 psi | 71% | 2936 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 37,217 psi | 58% | 2756 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 45,107 psi | 71% | 2940 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 36,100 psi | 57% | 2785 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 86% | 43,410 psi | 68% | 2995 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 92% | 43,642 psi | 68% | 2986 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 98% | 46,673 psi | 73% | 3091 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,831 psi | 70% | 2894 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,818 psi | 73% | 3005 fps | 99% |
| Winchester StaBALL HD | 64.5 gr | 80% | 28,689 psi | 45% | 2713 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,465 psi | 62% | 2818 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 77 powders for 7 x 66 SE v. Hofe loaded with the .284 | 139gr | Reichenberg HDB Universal. Winchester StaBALL HD delivers the highest muzzle velocity at 3,307 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,307 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 139.0 gr projectile in 0.284" calls for a 1:11.0 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. Winchester StaBALL HD, IMR 7828 SSC, Norma MRP rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 139gr | Reichenberg HDB Universal 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.