Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 150gr | Peregrine VLR-4 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 MAGPRO, Alliant Reloder-26 and Winchester StaBALL HD.
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% | 56,536 psi | 89% | 3028 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,259 psi | 85% | 3009 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,303 psi | 87% | 3127 fps | 98% |
| ADI AR 2208 | <<locked>> | 82% | 55,680 psi | 87% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,477 psi | 87% | 3071 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 96% | 56,927 psi | 89% | 3136 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,500 psi | 74% | 2959 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,134 psi | 66% | 2913 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,709 psi | 87% | 3068 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,913 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,535 psi | 87% | 3071 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,739 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,013 psi | 86% | 3061 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,710 psi | 89% | 3127 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,711 psi | 90% | 3091 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,447 psi | 84% | 3100 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,375 psi | 85% | 3133 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 55,259 psi | 87% | 3031 fps | 96.2% |
| Bofors RP15 | <<locked>> | 98% | 55,564 psi | 87% | 3110 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,298 psi | 77% | 3031 fps | 98.4% |
| Bofors RP5 | <<locked>> | 96% | 56,710 psi | 89% | 3127 fps | 99.7% |
| Bofors RP7 | <<locked>> | 86% | 56,971 psi | 89% | 3012 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,402 psi | 82% | 3051 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 86% | 56,362 psi | 88% | 3071 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 55,448 psi | 87% | 3025 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 94% | 57,043 psi | 89% | 3071 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,724 psi | 87% | 3051 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,709 psi | 87% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,286 psi | 82% | 3169 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 56,826 psi | 89% | 3107 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 58% | 1900 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,056 psi | 86% | 2999 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,172 psi | 86% | 2986 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 54,853 psi | 86% | 3002 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,389 psi | 85% | 2995 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 54,534 psi | 85% | 3107 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 55,463 psi | 87% | 2979 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,203 psi | 90% | 3031 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2989 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,072 psi | 88% | 3058 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 37,594 psi | 59% | 2828 fps | 97.3% |
| Norma MRP | <<locked>> | 94% | 56,681 psi | 89% | 3153 fps | 100% |
| Norma URP | <<locked>> | 88% | 56,652 psi | 89% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,288 psi | 87% | 3130 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 55,448 psi | 87% | 3054 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,664 psi | 84% | 3061 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,608 psi | 59% | 1942 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,188 psi | 88% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,520 psi | 85% | 3035 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,681 psi | 89% | 3123 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,069 psi | 83% | 3169 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,718 psi | 75% | 3038 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 82% | 54,636 psi | 86% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,681 psi | 89% | 3038 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 54,201 psi | 85% | 3045 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 56,971 psi | 89% | 3012 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,463 psi | 87% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,203 psi | 90% | 3031 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,246 psi | 88% | 3018 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,723 psi | 86% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,694 psi | 86% | 2930 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,595 psi | 90% | 3100 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 54,317 psi | 85% | 2953 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,520 psi | 85% | 2969 fps | 98% |
| Somchem S365 | <<locked>> | 90% | 56,927 psi | 89% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,737 psi | 86% | 3018 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 55,535 psi | 87% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,810 psi | 86% | 2986 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,302 psi | 85% | 2995 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 57,595 psi | 90% | 3045 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,260 psi | 88% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,565 psi | 89% | 3150 fps | 98.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3120 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 48,921 psi | 77% | 3045 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,476 psi | 85% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,362 psi | 88% | 3071 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,506 psi | 87% | 3179 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,708 psi | 86% | 3012 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% | 32,358 psi | 51% | 2559 fps | 96.7% |
| Accurate 4350 | <<locked>> | 80% | 43,903 psi | 69% | 2831 fps | 99.9% |
| Accurate MAGPRO | 69.5 gr | 88% | 44,614 psi | 70% | 2927 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 52,388 psi | 82% | 2920 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 36,840 psi | 58% | 2700 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 86% | 40,335 psi | 63% | 2812 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 96% | 41,510 psi | 65% | 2835 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 92% | 32,242 psi | 51% | 2651 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,144 psi | 58% | 2703 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,548 psi | 84% | 2943 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,424 psi | 66% | 2844 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,950 psi | 77% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,767 psi | 58% | 2694 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,507 psi | 59% | 2756 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,256 psi | 49% | 2592 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,167 psi | 46% | 2552 fps | 95.9% |
| Alliant Reloder-26 | 63.9 gr | 80% | 34,127 psi | 53% | 2733 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 51,837 psi | 81% | 2972 fps | 95.3% |
| Bofors RP15 | <<locked>> | 86% | 37,188 psi | 58% | 2743 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 37,333 psi | 59% | 2779 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 37,507 psi | 59% | 2756 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 46,963 psi | 74% | 2841 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 92% | 39,610 psi | 62% | 2792 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 45,934 psi | 72% | 2887 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 48,617 psi | 76% | 2907 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 43,120 psi | 68% | 2818 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,337 psi | 66% | 2802 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,885 psi | 63% | 2723 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 34,722 psi | 54% | 2762 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 45,426 psi | 71% | 2910 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 43% | 1696 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,598 psi | 67% | 2772 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,501 psi | 76% | 2871 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 42,061 psi | 66% | 2782 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,090 psi | 66% | 2762 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 41,481 psi | 65% | 2851 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,832 psi | 72% | 2815 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 44,237 psi | 69% | 2805 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 29,689 psi | 47% | 2484 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 42,569 psi | 67% | 2808 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 32,663 psi | 51% | 2697 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 33,997 psi | 53% | 2694 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 43,410 psi | 68% | 2825 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 41,234 psi | 65% | 2858 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 42,322 psi | 66% | 2822 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 33,910 psi | 53% | 2657 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,108 psi | 44% | 1739 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,069 psi | 82% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,063 psi | 69% | 2858 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,366 psi | 66% | 2871 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 31,662 psi | 50% | 2667 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,179 psi | 69% | 2963 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 51,068 psi | 80% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,959 psi | 64% | 2746 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 36,056 psi | 56% | 2677 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,963 psi | 74% | 2841 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,832 psi | 72% | 2815 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 44,237 psi | 69% | 2805 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,692 psi | 83% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,430 psi | 81% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,991 psi | 71% | 2762 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,723 psi | 56% | 2674 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 50,879 psi | 80% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 41,640 psi | 65% | 2730 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 40,219 psi | 63% | 2776 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,593 psi | 57% | 2664 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 48,849 psi | 77% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,773 psi | 70% | 2818 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 33,794 psi | 53% | 2585 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 44,121 psi | 69% | 2822 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 35,128 psi | 55% | 2674 fps | 99.3% |
| Vihtavuori N560 | <<locked>> | 86% | 42,612 psi | 67% | 2884 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 92% | 42,351 psi | 66% | 2864 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 98% | 45,614 psi | 71% | 2979 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,092 psi | 69% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,151 psi | 72% | 2894 fps | 99.2% |
| Winchester StaBALL HD | 61.4 gr | 80% | 27,688 psi | 43% | 2598 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 35,795 psi | 56% | 2641 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 78 powders for 7 x 66 SE v. Hofe loaded with the .284 | 150gr | Peregrine VLR-4. Winchester StaBALL HD delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,179 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 150.0 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. Accurate MAGPRO, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 150gr | Peregrine VLR-4 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.