Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 140gr | Prvi Partizan PSP BT bullet and 78 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% | 54,607 psi | 86% | 3091 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,028 psi | 88% | 3133 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,159 psi | 88% | 3251 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 94% | 57,217 psi | 90% | 3255 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 56,927 psi | 89% | 3094 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,811 psi | 89% | 3192 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 54,447 psi | 85% | 3189 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,965 psi | 77% | 3077 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,714 psi | 69% | 3031 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,058 psi | 89% | 3186 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,710 psi | 89% | 3189 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,215 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,347 psi | 88% | 3179 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,462 psi | 85% | 3186 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,811 psi | 87% | 3163 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,042 psi | 86% | 3222 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,318 psi | 88% | 3258 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,507 psi | 89% | 3146 fps | 96% |
| Bofors RP15 | <<locked>> | 98% | 57,188 psi | 90% | 3232 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,024 psi | 80% | 3153 fps | 98.3% |
| Bofors RP5 | <<locked>> | 94% | 54,462 psi | 85% | 3186 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 54,752 psi | 86% | 3074 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3173 fps | 99% |
| Hodgdon H414 | <<locked>> | 86% | 57,624 psi | 90% | 3189 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 56,565 psi | 89% | 3143 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 54,462 psi | 85% | 3127 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,029 psi | 89% | 3169 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,101 psi | 89% | 3107 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3294 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 54,404 psi | 85% | 3166 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1985 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,434 psi | 88% | 3117 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,144 psi | 88% | 3100 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 56,318 psi | 88% | 3123 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,622 psi | 87% | 3110 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 96% | 56,057 psi | 88% | 3228 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 56,782 psi | 89% | 3097 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,911 psi | 86% | 3091 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 3110 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,508 psi | 90% | 3176 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 39,291 psi | 62% | 2949 fps | 97.4% |
| Norma MRP | <<locked>> | 92% | 54,360 psi | 85% | 3209 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 54,273 psi | 85% | 3114 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,942 psi | 89% | 3251 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 56,927 psi | 89% | 3176 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,317 psi | 87% | 3179 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 2031 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,696 psi | 90% | 3196 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,057 psi | 88% | 3156 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,331 psi | 85% | 3186 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 3294 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,748 psi | 78% | 3159 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 82% | 55,985 psi | 88% | 3077 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,346 psi | 85% | 3097 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 92% | 55,738 psi | 87% | 3163 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 54,752 psi | 86% | 3074 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,782 psi | 89% | 3097 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,911 psi | 86% | 3091 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,508 psi | 90% | 3140 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,753 psi | 87% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,115 psi | 88% | 3048 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,303 psi | 87% | 3159 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 55,564 psi | 87% | 3071 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,985 psi | 88% | 3087 fps | 98% |
| Somchem S365 | <<locked>> | 88% | 54,839 psi | 86% | 3117 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,434 psi | 88% | 3136 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 56,985 psi | 89% | 3041 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,217 psi | 88% | 3107 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,883 psi | 88% | 3114 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 55,288 psi | 87% | 3110 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,462 psi | 85% | 3136 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,230 psi | 85% | 3202 fps | 98% |
| Vihtavuori N565 | <<locked>> | 98% | 54,201 psi | 85% | 3179 fps | 98.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 3169 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,753 psi | 87% | 3058 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,157 psi | 85% | 3133 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,595 psi | 90% | 3304 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,289 psi | 88% | 3130 fps | 99.3% |
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% | 34,011 psi | 53% | 2677 fps | 96.8% |
| Accurate 4350 | <<locked>> | 80% | 45,614 psi | 71% | 2956 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 42,467 psi | 67% | 2979 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 88% | 46,209 psi | 72% | 3048 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 53,359 psi | 84% | 3035 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,927 psi | 59% | 2812 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 86% | 41,524 psi | 65% | 2923 fps | 95% |
| ADI AR 2217 | <<locked>> | 96% | 42,801 psi | 67% | 2946 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 92% | 33,663 psi | 53% | 2769 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,392 psi | 60% | 2815 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,482 psi | 68% | 2956 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,343 psi | 79% | 3084 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,072 psi | 60% | 2808 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,798 psi | 61% | 2864 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,561 psi | 51% | 2703 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,371 psi | 48% | 2664 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,665 psi | 56% | 2851 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,982 psi | 83% | 3081 fps | 95.1% |
| Bofors RP15 | <<locked>> | 86% | 38,479 psi | 60% | 2854 fps | 95.5% |
| Bofors RP30 | <<locked>> | 94% | 41,466 psi | 65% | 2956 fps | 95.9% |
| Bofors RP5 | <<locked>> | 84% | 38,798 psi | 61% | 2864 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 48,211 psi | 76% | 2956 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 92% | 41,002 psi | 64% | 2907 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 47,166 psi | 74% | 3005 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 49,821 psi | 78% | 3022 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 44,324 psi | 69% | 2930 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,569 psi | 68% | 2913 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,075 psi | 64% | 2835 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,085 psi | 57% | 2877 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 46,847 psi | 73% | 3028 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 43% | 1775 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,656 psi | 68% | 2881 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,545 psi | 78% | 2986 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 43,410 psi | 68% | 2897 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,265 psi | 68% | 2871 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 88% | 42,641 psi | 67% | 2963 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 47,181 psi | 74% | 2930 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 45,542 psi | 71% | 2920 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 31,169 psi | 49% | 2598 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 43,685 psi | 68% | 2917 fps | 96.9% |
| Norma 217 | <<locked>> | 96% | 34,360 psi | 54% | 2818 fps | 95.3% |
| Norma MRP | 65.4 gr | 80% | 35,404 psi | 55% | 2808 fps | 96% |
| Norma URP | <<locked>> | 80% | 44,701 psi | 70% | 2940 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 42,511 psi | 67% | 2972 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 43,511 psi | 68% | 2933 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 35,331 psi | 55% | 2769 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 1818 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,505 psi | 84% | 3133 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,571 psi | 71% | 2976 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,787 psi | 69% | 2992 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,982 psi | 52% | 2779 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,108 psi | 72% | 3087 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 52,562 psi | 82% | 3025 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,959 psi | 66% | 2851 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 37,304 psi | 58% | 2789 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 48,211 psi | 76% | 2956 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,181 psi | 74% | 2930 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 45,542 psi | 71% | 2920 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,853 psi | 84% | 3081 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,591 psi | 82% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,166 psi | 72% | 2874 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,970 psi | 58% | 2785 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 52,257 psi | 82% | 3018 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,847 psi | 72% | 2900 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 41,568 psi | 65% | 2890 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,014 psi | 60% | 2776 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 50,096 psi | 79% | 2936 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,166 psi | 72% | 2936 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 35,027 psi | 55% | 2694 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 45,440 psi | 71% | 2936 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 36,477 psi | 57% | 2785 fps | 99.2% |
| Vihtavuori N560 | 70.3 gr | 86% | 43,947 psi | 69% | 2999 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 92% | 44,005 psi | 69% | 2982 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 98% | 47,253 psi | 74% | 3097 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,165 psi | 71% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,384 psi | 74% | 3009 fps | 99.1% |
| Winchester StaBALL HD | 64.7 gr | 80% | 28,950 psi | 45% | 2713 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,086 psi | 58% | 2753 fps | 95% |
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 78 powders for 7 x 66 SE v. Hofe loaded with the .284 | 140gr | Prvi Partizan PSP BT. Winchester StaBALL HD 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 78 of the 78 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 1:12.0 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, Norma MRP, Vihtavuori N560 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 140gr | Prvi Partizan PSP BT 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.