Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 140gr | Peregrine VRG-3 bullet and 78 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>> | 96% | 57,348 psi | 90% | 3140 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,766 psi | 86% | 3120 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,230 psi | 87% | 3241 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 94% | 56,275 psi | 88% | 3245 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 82% | 56,231 psi | 88% | 3087 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,159 psi | 88% | 3189 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 53,940 psi | 85% | 3186 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,153 psi | 75% | 3068 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,786 psi | 67% | 3018 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,392 psi | 90% | 3107 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,072 psi | 88% | 3186 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,319 psi | 90% | 3202 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,637 psi | 87% | 3173 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,682 psi | 90% | 3245 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,897 psi | 86% | 3153 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,404 psi | 85% | 3215 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,288 psi | 87% | 3245 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 55,825 psi | 87% | 3140 fps | 95.9% |
| Bofors RP15 | <<locked>> | 98% | 56,521 psi | 89% | 3225 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,227 psi | 79% | 3143 fps | 98.2% |
| Bofors RP5 | <<locked>> | 96% | 57,682 psi | 90% | 3245 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 57,537 psi | 90% | 3130 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,388 psi | 84% | 3169 fps | 99% |
| Hodgdon H414 | <<locked>> | 86% | 56,884 psi | 89% | 3182 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 55,985 psi | 88% | 3140 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 94% | 57,522 psi | 90% | 3182 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,579 psi | 89% | 3169 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,362 psi | 88% | 3104 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,171 psi | 83% | 3284 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 57,725 psi | 90% | 3225 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1988 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,579 psi | 87% | 3110 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,622 psi | 87% | 3097 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 55,492 psi | 87% | 3117 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,998 psi | 86% | 3107 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 55,521 psi | 87% | 3225 fps | 98.6% |
| Lovex S065 | <<locked>> | 86% | 56,057 psi | 88% | 3094 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,143 psi | 85% | 3084 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 3097 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,782 psi | 89% | 3173 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 38,232 psi | 60% | 2930 fps | 97.1% |
| Norma MRP | <<locked>> | 94% | 57,595 psi | 90% | 3268 fps | 100% |
| Norma URP | <<locked>> | 88% | 57,290 psi | 90% | 3166 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,318 psi | 88% | 3248 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 56,202 psi | 88% | 3173 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,534 psi | 85% | 3173 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,652 psi | 59% | 2034 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,014 psi | 89% | 3189 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,114 psi | 86% | 3150 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,493 psi | 90% | 3238 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3281 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,834 psi | 77% | 3150 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 82% | 55,085 psi | 86% | 3071 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,406 psi | 90% | 3156 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 54,911 psi | 86% | 3159 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 57,537 psi | 90% | 3130 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,057 psi | 88% | 3094 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,143 psi | 85% | 3084 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,855 psi | 89% | 3136 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,245 psi | 87% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,332 psi | 87% | 3045 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,476 psi | 85% | 3153 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 54,853 psi | 86% | 3068 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,201 psi | 87% | 3081 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 57,653 psi | 90% | 3166 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,550 psi | 87% | 3130 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 56,043 psi | 88% | 3035 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,274 psi | 87% | 3100 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,027 psi | 86% | 3104 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 54,491 psi | 85% | 3104 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,000 psi | 89% | 3179 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,421 psi | 90% | 3261 fps | 98.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,927 psi | 89% | 3232 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,850 psi | 78% | 3153 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,027 psi | 86% | 3054 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,116 psi | 90% | 3189 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,608 psi | 89% | 3297 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,448 psi | 87% | 3123 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% | 32,808 psi | 51% | 2651 fps | 96.3% |
| Accurate 4350 | <<locked>> | 80% | 44,425 psi | 70% | 2940 fps | 99.9% |
| Accurate High Country | 69.1 gr | 84% | 41,365 psi | 65% | 2959 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 88% | 45,310 psi | 71% | 3035 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 52,866 psi | 83% | 3035 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,275 psi | 58% | 2799 fps | 95% |
| ADI AR 2213 | <<locked>> | 88% | 43,758 psi | 69% | 2982 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 96% | 41,989 psi | 66% | 2933 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 92% | 32,793 psi | 51% | 2746 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,954 psi | 85% | 3054 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,902 psi | 67% | 2953 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,661 psi | 78% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,202 psi | 58% | 2792 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,000 psi | 60% | 2851 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,589 psi | 50% | 2684 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,414 psi | 46% | 2638 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,548 psi | 54% | 2825 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,533 psi | 82% | 3077 fps | 95.1% |
| Bofors RP15 | <<locked>> | 86% | 37,652 psi | 59% | 2841 fps | 95.2% |
| Bofors RP30 | <<locked>> | 94% | 40,683 psi | 64% | 2943 fps | 95.7% |
| Bofors RP5 | <<locked>> | 84% | 38,000 psi | 60% | 2851 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 47,355 psi | 74% | 2949 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 40,219 psi | 63% | 2894 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 46,470 psi | 73% | 2995 fps | 99% |
| Hodgdon H4350 | <<locked>> | 80% | 49,052 psi | 77% | 3015 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 43,584 psi | 68% | 2923 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,948 psi | 72% | 2972 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,364 psi | 63% | 2828 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,724 psi | 59% | 2930 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 46,064 psi | 72% | 3018 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 43% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,047 psi | 67% | 2874 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,023 psi | 77% | 2982 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 42,395 psi | 66% | 2884 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,467 psi | 67% | 2861 fps | 95% |
| IMR 7828 SSC | 69.7 gr | 88% | 41,872 psi | 66% | 2949 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 46,253 psi | 72% | 2920 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 44,585 psi | 70% | 2907 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 30,081 psi | 47% | 2575 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 43,033 psi | 67% | 2913 fps | 96.8% |
| Norma 217 | <<locked>> | 98% | 35,592 psi | 56% | 2858 fps | 96% |
| Norma MRP | <<locked>> | 80% | 34,548 psi | 54% | 2792 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 43,772 psi | 69% | 2927 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 41,655 psi | 65% | 2959 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 42,786 psi | 67% | 2923 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 34,432 psi | 54% | 2753 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,166 psi | 44% | 1821 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,837 psi | 83% | 3130 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,483 psi | 70% | 2959 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,873 psi | 67% | 2979 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,505 psi | 54% | 2835 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 45,179 psi | 71% | 3071 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 51,459 psi | 81% | 3015 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,321 psi | 65% | 2844 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 39,059 psi | 61% | 2838 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 47,355 psi | 74% | 2949 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,253 psi | 72% | 2920 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 44,585 psi | 70% | 2907 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,200 psi | 83% | 3077 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,851 psi | 81% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,252 psi | 71% | 2864 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,725 psi | 61% | 2835 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 51,329 psi | 80% | 3009 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,063 psi | 71% | 2894 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 40,770 psi | 64% | 2881 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,985 psi | 58% | 2759 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 80% | 49,182 psi | 77% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,252 psi | 71% | 2923 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 36,724 psi | 58% | 2743 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 44,657 psi | 70% | 2927 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 35,520 psi | 56% | 2769 fps | 99% |
| Vihtavuori N560 | <<locked>> | 86% | 43,149 psi | 68% | 2989 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 92% | 42,960 psi | 67% | 2966 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 98% | 46,412 psi | 73% | 3084 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,483 psi | 70% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,470 psi | 73% | 2995 fps | 99% |
| Winchester StaBALL HD | 65.2 gr | 80% | 28,050 psi | 44% | 2687 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,972 psi | 61% | 2805 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 83 powders for 7 x 66 SE v. Hofe loaded with the .284 | 140gr | Peregrine VRG-3. Winchester StaBALL HD delivers the highest muzzle velocity at 3,297 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,297 fps. ADI AR 2217 gives the best case fill at 100 %, and 83 of the 83 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. Accurate High Country, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 140gr | Peregrine VRG-3 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, IMR 8133 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.