Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 160gr | Brenneke TAG bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 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>> | 92% | 54,621 psi | 86% | 2920 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,622 psi | 87% | 2946 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,304 psi | 88% | 3081 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 57,290 psi | 90% | 3087 fps | 99% |
| ADI AR 2209 | <<locked>> | 90% | 56,681 psi | 89% | 3015 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 54,549 psi | 85% | 3022 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,591 psi | 82% | 2986 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,905 psi | 74% | 2943 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,884 psi | 89% | 3012 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,927 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,188 psi | 88% | 3002 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,679 psi | 86% | 3015 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,086 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,811 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,637 psi | 89% | 3074 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,970 psi | 88% | 2986 fps | 97.4% |
| Bofors RP15 | <<locked>> | 96% | 57,450 psi | 90% | 3061 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,259 psi | 87% | 3054 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 54,679 psi | 86% | 3015 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 57,682 psi | 90% | 2949 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,114 psi | 85% | 3012 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 57,479 psi | 90% | 3009 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,144 psi | 88% | 2963 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 54,288 psi | 85% | 2956 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,971 psi | 89% | 2999 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,145 psi | 90% | 2927 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,607 psi | 86% | 3130 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,070 psi | 85% | 2986 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 58% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,101 psi | 88% | 2940 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,637 psi | 87% | 2920 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,057 psi | 88% | 2940 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,187 psi | 86% | 2940 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 56,449 psi | 88% | 3061 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,482 psi | 67% | 2848 fps | 97.6% |
| Lovex S065 | <<locked>> | 84% | 56,289 psi | 88% | 2913 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,549 psi | 85% | 2913 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,854 psi | 88% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,174 psi | 90% | 2999 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 42,728 psi | 67% | 2871 fps | 99.3% |
| Norma MRP | <<locked>> | 90% | 54,549 psi | 85% | 3038 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,215 psi | 85% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,406 psi | 90% | 3087 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 86% | 56,739 psi | 89% | 2995 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,854 psi | 88% | 3015 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,058 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,854 psi | 88% | 2972 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,317 psi | 85% | 3002 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,216 psi | 87% | 3123 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,476 psi | 85% | 3081 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 90% | 57,638 psi | 90% | 2982 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 90% | 55,782 psi | 87% | 2992 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 57,682 psi | 90% | 2949 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,289 psi | 88% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,549 psi | 85% | 2913 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,317 psi | 87% | 2867 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,361 psi | 87% | 2989 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 55,521 psi | 87% | 2920 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 54,940 psi | 86% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,217 psi | 88% | 2963 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,434 psi | 88% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,898 psi | 88% | 2923 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,854 psi | 88% | 2946 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 54,998 psi | 86% | 2927 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,607 psi | 86% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,331 psi | 85% | 3035 fps | 99% |
| Vihtavuori N565 | <<locked>> | 96% | 54,476 psi | 85% | 3018 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 3084 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,228 psi | 82% | 3071 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,332 psi | 87% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,696 psi | 90% | 3012 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,694 psi | 86% | 3071 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,217 psi | 88% | 2963 fps | 99.8% |
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% | 36,013 psi | 56% | 2579 fps | 98.6% |
| Accurate 4350 | <<locked>> | 80% | 48,399 psi | 76% | 2835 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 39,479 psi | 62% | 2756 fps | 96.3% |
| Accurate MAGPRO | <<locked>> | 82% | 39,929 psi | 63% | 2753 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 40,451 psi | 63% | 2717 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 82% | 38,508 psi | 60% | 2703 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 90% | 37,347 psi | 59% | 2674 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 86% | 29,356 psi | 46% | 2503 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,799 psi | 64% | 2717 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,615 psi | 73% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,408 psi | 63% | 2710 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,230 psi | 57% | 2651 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,954 psi | 55% | 2608 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,182 psi | 47% | 2523 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,551 psi | 60% | 2756 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 46,456 psi | 73% | 2808 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 33,591 psi | 53% | 2582 fps | 95.2% |
| Bofors RP30 | <<locked>> | 88% | 36,448 psi | 57% | 2684 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 36,230 psi | 57% | 2651 fps | 96.4% |
| Bofors RP7 | <<locked>> | 80% | 50,836 psi | 80% | 2838 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 35,578 psi | 56% | 2631 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 50,169 psi | 79% | 2890 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 52,692 psi | 83% | 2907 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 38,493 psi | 60% | 2651 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,422 psi | 63% | 2694 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,830 psi | 69% | 2720 fps | 100% |
| Hodgdon Retumbo | 65.1 gr | 84% | 33,634 psi | 53% | 2667 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 50,183 psi | 79% | 2923 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,847 psi | 44% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,282 psi | 73% | 2776 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,315 psi | 82% | 2867 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 45,992 psi | 72% | 2779 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,147 psi | 63% | 2654 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 82% | 37,086 psi | 58% | 2680 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 36,898 psi | 58% | 2717 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 49,705 psi | 78% | 2812 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,906 psi | 75% | 2802 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 30,980 psi | 49% | 2451 fps | 97.1% |
| Norma 204 | <<locked>> | 80% | 46,456 psi | 73% | 2815 fps | 98.7% |
| Norma 217 | <<locked>> | 90% | 30,139 psi | 47% | 2556 fps | 95% |
| Norma MRP | <<locked>> | 80% | 38,058 psi | 60% | 2720 fps | 98.3% |
| Norma URP | <<locked>> | 80% | 47,384 psi | 74% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 36,680 psi | 57% | 2684 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 46,340 psi | 73% | 2822 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 82% | 32,735 psi | 51% | 2562 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 45% | 1706 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,646 psi | 76% | 2861 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,847 psi | 73% | 2881 fps | 100% |
| ReloadSwiss RS 76 | 68.1 gr | 82% | 30,530 psi | 48% | 2572 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 39,842 psi | 62% | 2799 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 41,611 psi | 65% | 2694 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 39,682 psi | 62% | 2694 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 80% | 50,836 psi | 80% | 2838 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,705 psi | 78% | 2812 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,906 psi | 75% | 2802 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,472 psi | 76% | 2756 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,349 psi | 62% | 2690 fps | 97.5% |
| Somchem S361 | <<locked>> | 80% | 42,308 psi | 66% | 2680 fps | 96.3% |
| Somchem S365 | <<locked>> | 80% | 44,701 psi | 70% | 2776 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,248 psi | 63% | 2674 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 80% | 52,721 psi | 83% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,907 psi | 77% | 2815 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,867 psi | 55% | 2546 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 80% | 48,095 psi | 75% | 2818 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,015 psi | 61% | 2684 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,159 psi | 60% | 2710 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 86% | 38,334 psi | 60% | 2703 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 92% | 41,234 psi | 65% | 2812 fps | 95% |
| Vihtavuori N570 | <<locked>> | 98% | 48,559 psi | 76% | 2999 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,153 psi | 75% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,357 psi | 79% | 2894 fps | 99.9% |
| Winchester StaBALL HD | 63.7 gr | 80% | 31,227 psi | 49% | 2635 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,782 psi | 58% | 2598 fps | 96.5% |
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 73 powders for 7 x 66 SE v. Hofe loaded with the .284 | 160gr | Brenneke TAG. Hodgdon Retumbo delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,130 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 160.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 160gr | Brenneke TAG 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.