Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 140gr | Sellier & Bellot FMJ bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and Vihtavuori N560.
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% | 55,042 psi | 86% | 3100 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,217 psi | 88% | 3136 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,579 psi | 89% | 3261 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 94% | 57,595 psi | 90% | 3261 fps | 98% |
| ADI AR 2208 | <<locked>> | 82% | 57,159 psi | 90% | 3097 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,000 psi | 89% | 3196 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 54,810 psi | 86% | 3199 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,284 psi | 77% | 3084 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,005 psi | 69% | 3038 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,232 psi | 90% | 3192 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,145 psi | 90% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,418 psi | 85% | 3153 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,521 psi | 89% | 3182 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,868 psi | 86% | 3192 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,941 psi | 88% | 3166 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,434 psi | 87% | 3228 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,753 psi | 89% | 3264 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,768 psi | 89% | 3153 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 57,537 psi | 90% | 3235 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,358 psi | 80% | 3156 fps | 98.4% |
| Bofors RP5 | <<locked>> | 94% | 54,868 psi | 86% | 3192 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 54,969 psi | 86% | 3081 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,360 psi | 85% | 3179 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 84% | 54,331 psi | 85% | 3136 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 56,971 psi | 89% | 3150 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 54,795 psi | 86% | 3133 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,421 psi | 90% | 3176 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,508 psi | 90% | 3114 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,389 psi | 85% | 3304 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 54,592 psi | 86% | 3169 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 58% | 1985 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,608 psi | 89% | 3120 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,521 psi | 89% | 3107 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 56,478 psi | 89% | 3127 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,724 psi | 87% | 3117 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 96% | 56,463 psi | 88% | 3238 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 56,985 psi | 89% | 3104 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,347 psi | 87% | 3100 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 3117 fps | 100% |
| Norma 204 | <<locked>> | 86% | 53,911 psi | 84% | 3117 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 39,450 psi | 62% | 2953 fps | 97.4% |
| Norma MRP | <<locked>> | 92% | 54,781 psi | 86% | 3219 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 54,737 psi | 86% | 3120 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,348 psi | 90% | 3261 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 57,334 psi | 90% | 3182 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,680 psi | 87% | 3186 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,753 psi | 59% | 2031 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,434 psi | 88% | 3163 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,549 psi | 85% | 3189 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,201 psi | 87% | 3301 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,067 psi | 78% | 3169 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 82% | 56,391 psi | 88% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,737 psi | 86% | 3104 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 56,130 psi | 88% | 3173 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 54,969 psi | 86% | 3081 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,985 psi | 89% | 3104 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,347 psi | 87% | 3100 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,144 psi | 88% | 2949 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,463 psi | 88% | 3054 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,680 psi | 87% | 3169 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 56,014 psi | 88% | 3077 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,333 psi | 88% | 3094 fps | 98% |
| Somchem S365 | <<locked>> | 88% | 55,085 psi | 86% | 3120 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,594 psi | 89% | 3143 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 57,174 psi | 90% | 3045 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,420 psi | 88% | 3110 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,231 psi | 88% | 3120 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 55,709 psi | 87% | 3117 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,679 psi | 86% | 3140 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,563 psi | 86% | 3212 fps | 98% |
| Vihtavuori N565 | <<locked>> | 98% | 54,563 psi | 86% | 3186 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 3176 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,130 psi | 88% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,331 psi | 85% | 3136 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,911 psi | 84% | 3251 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,681 psi | 89% | 3136 fps | 99.4% |
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% | 34,214 psi | 54% | 2680 fps | 96.9% |
| Accurate 4350 | <<locked>> | 80% | 45,847 psi | 72% | 2959 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 42,627 psi | 67% | 2986 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 88% | 46,601 psi | 73% | 3054 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 53,563 psi | 84% | 3038 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,276 psi | 60% | 2818 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 86% | 41,872 psi | 66% | 2933 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 96% | 43,105 psi | 68% | 2953 fps | 96% |
| ADI AR 2225 | <<locked>> | 92% | 33,794 psi | 53% | 2772 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,580 psi | 60% | 2818 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,729 psi | 69% | 2963 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,763 psi | 80% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,232 psi | 60% | 2812 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 39,189 psi | 61% | 2874 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,735 psi | 51% | 2710 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,516 psi | 48% | 2667 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,882 psi | 56% | 2854 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,243 psi | 83% | 3087 fps | 95.3% |
| Bofors RP15 | <<locked>> | 86% | 38,827 psi | 61% | 2864 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 39,001 psi | 61% | 2900 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 39,189 psi | 61% | 2874 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 48,443 psi | 76% | 2963 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 92% | 41,336 psi | 65% | 2913 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 47,384 psi | 74% | 3009 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 49,995 psi | 78% | 3028 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 44,657 psi | 70% | 2940 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,918 psi | 69% | 2923 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,307 psi | 65% | 2841 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,390 psi | 57% | 2887 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 47,007 psi | 74% | 3031 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 43% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,019 psi | 69% | 2887 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,748 psi | 78% | 2989 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 43,627 psi | 68% | 2900 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,439 psi | 68% | 2877 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 43,004 psi | 67% | 2972 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 47,355 psi | 74% | 2936 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 45,716 psi | 72% | 2923 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 31,488 psi | 49% | 2605 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 43,888 psi | 69% | 2923 fps | 97% |
| Norma 217 | <<locked>> | 96% | 34,476 psi | 54% | 2822 fps | 95.4% |
| Norma MRP | 65.7 gr | 80% | 35,592 psi | 56% | 2815 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 44,904 psi | 70% | 2946 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 39,900 psi | 63% | 2910 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 43,714 psi | 69% | 2936 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 35,650 psi | 56% | 2779 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 1818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,759 psi | 72% | 2979 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,976 psi | 69% | 2995 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,257 psi | 52% | 2789 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,398 psi | 73% | 3094 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 52,765 psi | 83% | 3028 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,308 psi | 66% | 2861 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 37,492 psi | 59% | 2795 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 48,443 psi | 76% | 2963 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,355 psi | 74% | 2936 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 45,716 psi | 72% | 2923 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,794 psi | 83% | 2900 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,340 psi | 73% | 2881 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,188 psi | 58% | 2792 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 52,518 psi | 82% | 3022 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 46,151 psi | 72% | 2910 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 42,003 psi | 66% | 2900 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,159 psi | 60% | 2782 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 50,328 psi | 79% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,340 psi | 73% | 2940 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,360 psi | 55% | 2703 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 45,818 psi | 72% | 2943 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 36,840 psi | 58% | 2795 fps | 99.3% |
| Vihtavuori N560 | 70.7 gr | 86% | 44,324 psi | 69% | 3009 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 92% | 44,324 psi | 69% | 2992 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 98% | 47,572 psi | 75% | 3104 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,513 psi | 71% | 2897 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,558 psi | 75% | 3012 fps | 99.2% |
| Winchester StaBALL HD | 65 gr | 80% | 29,109 psi | 46% | 2720 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,231 psi | 58% | 2756 fps | 95.1% |
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 76 powders for 7 x 66 SE v. Hofe loaded with the .284 | 140gr | Sellier & Bellot FMJ. Hodgdon Retumbo delivers the highest muzzle velocity at 3,304 fps; across all powders the maximum-charge window runs from 1,985 fps to 3,304 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 1:12.5 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. Winchester StaBALL HD, Norma MRP, Vihtavuori N560 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 140gr | Sellier & Bellot FMJ 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.