Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 140gr | Peregrine VLR-4 bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and ADI AR 2213.
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% | 54,172 psi | 85% | 3084 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,782 psi | 87% | 3133 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 55,883 psi | 88% | 3248 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 96% | 57,000 psi | 89% | 3251 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 84% | 57,406 psi | 90% | 3097 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,159 psi | 90% | 3192 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 96% | 54,621 psi | 86% | 3189 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,484 psi | 71% | 2999 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,393 psi | 63% | 2949 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,114 psi | 86% | 3068 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,058 psi | 89% | 3196 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,331 psi | 85% | 3153 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,347 psi | 88% | 3176 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,259 psi | 85% | 3182 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,201 psi | 87% | 3156 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,198 psi | 80% | 3159 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,956 psi | 88% | 3255 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 57,130 psi | 90% | 3146 fps | 95.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,913 psi | 89% | 3225 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 56,043 psi | 88% | 3084 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,992 psi | 74% | 3077 fps | 97.3% |
| Bofors RP5 | <<locked>> | 96% | 54,259 psi | 85% | 3182 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 55,158 psi | 86% | 3077 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,357 psi | 79% | 3100 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 82% | 56,101 psi | 88% | 3104 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,201 psi | 85% | 3130 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 57,101 psi | 89% | 3146 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 94% | 54,824 psi | 86% | 3127 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,348 psi | 90% | 3169 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,246 psi | 90% | 3110 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,082 psi | 78% | 3219 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 54,737 psi | 86% | 3169 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1965 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,956 psi | 89% | 3077 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,869 psi | 89% | 3120 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,768 psi | 89% | 3104 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 56,362 psi | 88% | 3123 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,086 psi | 88% | 3114 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 98% | 56,231 psi | 88% | 3228 fps | 98.5% |
| Lovex S062 | <<locked>> | 82% | 57,116 psi | 90% | 3068 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,188 psi | 90% | 3104 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,187 psi | 86% | 3094 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,721 psi | 81% | 3045 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,085 psi | 85% | 3117 fps | 98.8% |
| Norma MRP | <<locked>> | 94% | 54,070 psi | 85% | 3205 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 54,476 psi | 85% | 3117 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,898 psi | 89% | 3248 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 90% | 57,043 psi | 89% | 3176 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,056 psi | 86% | 3173 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,463 psi | 59% | 2011 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,043 psi | 88% | 3091 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 53,722 psi | 84% | 3140 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,028 psi | 88% | 3156 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,317 psi | 85% | 3186 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,517 psi | 79% | 3212 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 56,144 psi | 88% | 3081 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,795 psi | 86% | 3100 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 94% | 55,767 psi | 87% | 3163 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 55,158 psi | 86% | 3077 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,188 psi | 90% | 3104 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,116 psi | 90% | 3068 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,187 psi | 86% | 3094 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,273 psi | 85% | 3087 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,652 psi | 89% | 2953 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,739 psi | 89% | 3054 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,317 psi | 87% | 3156 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 55,912 psi | 88% | 3074 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,478 psi | 89% | 3091 fps | 97.8% |
| Somchem S365 | <<locked>> | 90% | 54,665 psi | 86% | 3117 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,260 psi | 88% | 3133 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 86% | 57,363 psi | 90% | 3045 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,391 psi | 88% | 3107 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,014 psi | 88% | 3114 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 55,666 psi | 87% | 3114 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,450 psi | 90% | 3186 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,085 psi | 85% | 3199 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,563 psi | 84% | 3169 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,289 psi | 88% | 3068 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,447 psi | 85% | 3136 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3301 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,521 psi | 89% | 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% | 30,951 psi | 49% | 2598 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 42,148 psi | 66% | 2887 fps | 99.6% |
| Accurate High Country | <<locked>> | 86% | 41,901 psi | 66% | 2969 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 90% | 45,803 psi | 72% | 3038 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 50,720 psi | 79% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,029 psi | 60% | 2812 fps | 95% |
| ADI AR 2213 | 68.6 gr | 90% | 44,527 psi | 70% | 2992 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 42,656 psi | 67% | 2936 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 35,244 psi | 55% | 2815 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,634 psi | 81% | 3012 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,683 psi | 64% | 2900 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,905 psi | 74% | 3028 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 37,869 psi | 59% | 2805 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,392 psi | 60% | 2861 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,936 psi | 47% | 2635 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,892 psi | 47% | 2648 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,416 psi | 51% | 2766 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,621 psi | 84% | 3084 fps | 95% |
| Bofors RP15 | <<locked>> | 88% | 38,072 psi | 60% | 2848 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 52,199 psi | 82% | 3022 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,683 psi | 64% | 2940 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 38,392 psi | 60% | 2861 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 45,571 psi | 71% | 2900 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 40,727 psi | 64% | 2897 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 52,518 psi | 82% | 3045 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,222 psi | 69% | 2946 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 46,818 psi | 73% | 2963 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 44,483 psi | 70% | 2933 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,775 psi | 73% | 2979 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,189 psi | 60% | 2776 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,087 psi | 60% | 2933 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 43,395 psi | 68% | 2959 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 43% | 1759 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,330 psi | 84% | 3022 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,176 psi | 65% | 2825 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,108 psi | 74% | 2933 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 40,306 psi | 63% | 2831 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,282 psi | 73% | 2933 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 90% | 42,525 psi | 67% | 2956 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 53,780 psi | 84% | 3015 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,425 psi | 70% | 2877 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 42,598 psi | 67% | 2858 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 30,371 psi | 48% | 2582 fps | 95% |
| Norma 204 | <<locked>> | 80% | 40,973 psi | 64% | 2858 fps | 95.9% |
| Norma MRP | 64.5 gr | 82% | 34,969 psi | 55% | 2802 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 41,626 psi | 65% | 2877 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 42,351 psi | 66% | 2966 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 40,683 psi | 64% | 2871 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 90% | 37,666 psi | 59% | 2831 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 44% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,373 psi | 82% | 3031 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,835 psi | 78% | 3077 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,221 psi | 66% | 2910 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,625 psi | 64% | 2923 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,925 psi | 55% | 2838 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 49,110 psi | 77% | 2969 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,061 psi | 66% | 2854 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 39,624 psi | 62% | 2848 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 45,571 psi | 71% | 2900 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,425 psi | 70% | 2877 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 53,780 psi | 84% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,598 psi | 67% | 2858 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,850 psi | 80% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,864 psi | 78% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,395 psi | 68% | 2818 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,276 psi | 62% | 2841 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 49,298 psi | 77% | 2966 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,934 psi | 72% | 2900 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 38,479 psi | 60% | 2835 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,998 psi | 55% | 2703 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 47,079 psi | 74% | 2887 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,163 psi | 68% | 2877 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 37,173 psi | 58% | 2749 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 42,525 psi | 67% | 2877 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 33,417 psi | 52% | 2713 fps | 98.4% |
| Vihtavuori N560 | 69.2 gr | 88% | 43,714 psi | 69% | 2995 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 43,424 psi | 68% | 2969 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,351 psi | 66% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,222 psi | 69% | 2946 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,440 psi | 41% | 2621 fps | 98.1% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,624 psi | 62% | 2812 fps | 95.7% |
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 86 powders for 7 x 66 SE v. Hofe loaded with the .284 | 140gr | Peregrine VLR-4. Winchester StaBALL HD delivers the highest muzzle velocity at 3,301 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,301 fps. ADI AR 2217 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:9.0 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. Norma MRP, Vihtavuori N560, ADI AR 2213 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 140gr | Peregrine VLR-4 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, Vihtavuori N170, Vihtavuori N568 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.