Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 144gr | Peregrine VLR-5 bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Accurate MAGPRO and Ramshot Grand.
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% | 55,521 psi | 87% | 3068 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,087 psi | 89% | 3110 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,389 psi | 85% | 3169 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 55,056 psi | 86% | 3022 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,621 psi | 86% | 3114 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 55,898 psi | 88% | 3173 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,572 psi | 73% | 2989 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,423 psi | 65% | 2946 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,188 psi | 88% | 3041 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,534 psi | 85% | 3117 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,651 psi | 87% | 3133 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,580 psi | 90% | 3159 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,608 psi | 87% | 3166 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,623 psi | 89% | 3136 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,533 psi | 82% | 3143 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,595 psi | 90% | 3238 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,766 psi | 86% | 3153 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 57,188 psi | 90% | 3061 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,356 psi | 76% | 3068 fps | 97.9% |
| Bofors RP5 | <<locked>> | 96% | 55,608 psi | 87% | 3166 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 56,188 psi | 88% | 3058 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,576 psi | 81% | 3091 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 82% | 57,203 psi | 90% | 3081 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,390 psi | 87% | 3114 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 54,621 psi | 86% | 3071 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 56,057 psi | 88% | 3114 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,810 psi | 86% | 3091 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,708 psi | 86% | 3035 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,401 psi | 81% | 3209 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 56,072 psi | 88% | 3153 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 58% | 1942 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,404 psi | 85% | 3045 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,230 psi | 85% | 3028 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 57,595 psi | 90% | 3104 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,188 psi | 90% | 3097 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 98% | 57,609 psi | 90% | 3215 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 54,694 psi | 86% | 3025 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,289 psi | 88% | 3074 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,011 psi | 83% | 3031 fps | 100% |
| Norma 204 | <<locked>> | 88% | 55,259 psi | 87% | 3100 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 36,680 psi | 57% | 2854 fps | 96.6% |
| Norma MRP | <<locked>> | 94% | 55,492 psi | 87% | 3192 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 55,651 psi | 87% | 3094 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,360 psi | 85% | 3169 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 54,636 psi | 86% | 3100 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3163 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,565 psi | 59% | 1988 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,087 psi | 89% | 3071 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,085 psi | 86% | 3117 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,348 psi | 90% | 3140 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,666 psi | 87% | 3166 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 3205 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 57,290 psi | 90% | 3058 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,927 psi | 88% | 3084 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 94% | 57,058 psi | 89% | 3146 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 56,188 psi | 88% | 3058 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,694 psi | 86% | 3025 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,289 psi | 88% | 3074 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,390 psi | 87% | 3068 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,624 psi | 90% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,143 psi | 85% | 2976 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,594 psi | 89% | 3143 fps | 99.5% |
| Somchem S355 | <<locked>> | 84% | 56,985 psi | 89% | 3051 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,638 psi | 90% | 3074 fps | 98.3% |
| Somchem S365 | <<locked>> | 90% | 56,028 psi | 88% | 3097 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,522 psi | 90% | 3117 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 54,781 psi | 86% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,580 psi | 90% | 3087 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,305 psi | 90% | 3094 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 56,826 psi | 89% | 3094 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,317 psi | 87% | 3114 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,448 psi | 87% | 3186 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 3156 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,508 psi | 90% | 3045 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,637 psi | 87% | 3117 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,215 psi | 85% | 3222 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,983 psi | 85% | 3054 fps | 99.1% |
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% | 31,792 psi | 50% | 2589 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 43,178 psi | 68% | 2874 fps | 99.8% |
| Accurate MAGPRO | 72.1 gr | 90% | 47,036 psi | 74% | 3031 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 51,634 psi | 81% | 2966 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,885 psi | 61% | 2799 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 42,380 psi | 66% | 2910 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 96% | 40,770 psi | 64% | 2864 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 33,823 psi | 53% | 2743 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,649 psi | 83% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,626 psi | 65% | 2884 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,066 psi | 75% | 3012 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,740 psi | 61% | 2792 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 84% | 36,782 psi | 58% | 2785 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,705 psi | 48% | 2625 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,660 psi | 45% | 2579 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,359 psi | 52% | 2759 fps | 98.1% |
| Bofors RP15 | <<locked>> | 88% | 39,073 psi | 61% | 2838 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 53,272 psi | 83% | 3002 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 39,030 psi | 61% | 2867 fps | 95.1% |
| Bofors RP5 | <<locked>> | 84% | 36,782 psi | 58% | 2785 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 46,441 psi | 73% | 2884 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 38,928 psi | 61% | 2822 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 53,548 psi | 84% | 3025 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,208 psi | 71% | 2927 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 47,761 psi | 75% | 2946 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 45,513 psi | 71% | 2920 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,483 psi | 70% | 2900 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,117 psi | 61% | 2762 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,535 psi | 57% | 2861 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 44,498 psi | 70% | 2946 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1736 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,018 psi | 66% | 2812 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,964 psi | 75% | 2917 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 41,234 psi | 65% | 2818 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,266 psi | 69% | 2858 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 90% | 43,555 psi | 68% | 2949 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 45,295 psi | 71% | 2858 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 43,468 psi | 68% | 2841 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 31,198 psi | 49% | 2572 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 41,887 psi | 66% | 2844 fps | 96.5% |
| Norma 217 | <<locked>> | 98% | 34,229 psi | 54% | 2789 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 33,359 psi | 52% | 2723 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 42,583 psi | 67% | 2861 fps | 99.7% |
| Ramshot Grand | 68.6 gr | 88% | 40,321 psi | 63% | 2887 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 41,626 psi | 65% | 2858 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 35,868 psi | 56% | 2753 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 44% | 1778 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,359 psi | 84% | 3012 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,097 psi | 80% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,279 psi | 68% | 2894 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,597 psi | 65% | 2910 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,373 psi | 52% | 2762 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 50,154 psi | 79% | 2946 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,960 psi | 67% | 2841 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 37,855 psi | 59% | 2772 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 46,441 psi | 73% | 2884 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,295 psi | 71% | 2858 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 43,468 psi | 68% | 2841 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,909 psi | 81% | 3012 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,734 psi | 80% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,251 psi | 69% | 2799 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,521 psi | 59% | 2766 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 50,270 psi | 79% | 2946 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,816 psi | 69% | 2825 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 39,508 psi | 62% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,839 psi | 56% | 2694 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 48,008 psi | 75% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,121 psi | 69% | 2861 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 35,592 psi | 56% | 2677 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 43,468 psi | 68% | 2861 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 34,330 psi | 54% | 2707 fps | 98.9% |
| Vihtavuori N560 | 69.2 gr | 88% | 44,831 psi | 70% | 2986 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 92% | 41,495 psi | 65% | 2897 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,308 psi | 68% | 2822 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,208 psi | 71% | 2927 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,137 psi | 43% | 2621 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,695 psi | 59% | 2733 fps | 95.4% |
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 84 powders for 7 x 66 SE v. Hofe loaded with the .284 | 144gr | Peregrine VLR-5. Alliant Reloder-26 delivers the highest muzzle velocity at 3,238 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,238 fps. ADI AR 2217 gives the best case fill at 100 %, and 84 of the 84 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 144.0 gr projectile in 0.284" calls for a 1:9.5 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. Vihtavuori N560, Accurate MAGPRO, Ramshot Grand rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 144gr | Peregrine VLR-5 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 7977 Enduron, IMR 8133 Enduron, Vihtavuori N170 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.