Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 154gr | Reichenberg HDB Universal bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Alliant Reloder-26 and Hodgdon Retumbo.
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>> | 94% | 57,261 psi | 90% | 3002 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,723 psi | 86% | 2979 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,143 psi | 86% | 3104 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 92% | 55,869 psi | 88% | 3107 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 90% | 55,492 psi | 87% | 3041 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 57,072 psi | 89% | 3107 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,358 psi | 80% | 3005 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,876 psi | 72% | 2963 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,767 psi | 87% | 3038 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,593 psi | 87% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,623 psi | 89% | 3045 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,114 psi | 86% | 3028 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,203 psi | 90% | 3100 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,897 psi | 86% | 3012 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,273 psi | 85% | 3077 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,114 psi | 86% | 3100 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,940 psi | 86% | 3002 fps | 96.7% |
| Bofors RP15 | <<locked>> | 96% | 56,289 psi | 88% | 3087 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 3077 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 57,203 psi | 90% | 3100 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 56,724 psi | 89% | 2976 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3091 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 56,333 psi | 88% | 3035 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,259 psi | 87% | 2992 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 56,811 psi | 89% | 3038 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,869 psi | 88% | 3025 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,999 psi | 88% | 2956 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,768 psi | 89% | 3215 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,971 psi | 89% | 3074 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,246 psi | 58% | 1890 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,056 psi | 86% | 2966 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,636 psi | 86% | 2946 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,056 psi | 86% | 2969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,667 psi | 90% | 3022 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 54,897 psi | 86% | 3081 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,307 psi | 65% | 2861 fps | 96.7% |
| Lovex S065 | <<locked>> | 84% | 55,434 psi | 87% | 2946 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,130 psi | 90% | 2995 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 54,781 psi | 86% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,072 psi | 88% | 3025 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 41,495 psi | 65% | 2887 fps | 98.8% |
| Norma MRP | <<locked>> | 92% | 57,014 psi | 89% | 3120 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,681 psi | 89% | 3015 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,724 psi | 87% | 3104 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 55,651 psi | 87% | 3025 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,114 psi | 85% | 3035 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 60% | 1936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,810 psi | 86% | 3002 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,956 psi | 89% | 3087 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 53,766 psi | 84% | 3146 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,736 psi | 83% | 3097 fps | 98.2% |
| Rottweil R 904 | <<locked>> | 90% | 56,550 psi | 89% | 3005 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 54,679 psi | 86% | 3018 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 56,724 psi | 89% | 2976 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,434 psi | 87% | 2946 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,130 psi | 90% | 2995 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,505 psi | 85% | 2897 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,259 psi | 85% | 3012 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 54,462 psi | 85% | 2940 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 57,435 psi | 90% | 3018 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,027 psi | 86% | 2986 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,477 psi | 87% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,810 psi | 86% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,650 psi | 86% | 2969 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 54,056 psi | 85% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,956 psi | 89% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,753 psi | 89% | 3117 fps | 99% |
| Vihtavuori N565 | <<locked>> | 98% | 56,869 psi | 89% | 3100 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3097 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,288 psi | 85% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,333 psi | 88% | 3035 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,768 psi | 89% | 3153 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,911 psi | 86% | 2982 fps | 99.6% |
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% | 35,839 psi | 56% | 2608 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 47,863 psi | 75% | 2867 fps | 100% |
| Accurate High Country | 63.6 gr | 80% | 38,740 psi | 61% | 2776 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 84% | 42,090 psi | 66% | 2841 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 39,682 psi | 62% | 2740 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 40,625 psi | 64% | 2789 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 92% | 39,146 psi | 61% | 2749 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 88% | 30,995 psi | 49% | 2585 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,219 psi | 63% | 2743 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,701 psi | 72% | 2874 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,765 psi | 83% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,856 psi | 62% | 2736 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,592 psi | 56% | 2674 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,272 psi | 54% | 2635 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,805 psi | 47% | 2543 fps | 96.8% |
| Alliant Reloder-26 | 65.5 gr | 80% | 37,724 psi | 59% | 2782 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 48,559 psi | 76% | 2884 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 35,476 psi | 56% | 2667 fps | 95.4% |
| Bofors RP30 | <<locked>> | 90% | 38,334 psi | 60% | 2769 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 35,592 psi | 56% | 2674 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 50,038 psi | 78% | 2867 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 37,463 psi | 59% | 2713 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 49,182 psi | 77% | 2917 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 51,663 psi | 81% | 2930 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 40,567 psi | 64% | 2733 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,598 psi | 67% | 2779 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,163 psi | 68% | 2749 fps | 100% |
| Hodgdon Retumbo | 64.4 gr | 84% | 33,315 psi | 52% | 2690 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 49,139 psi | 77% | 2946 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,804 psi | 44% | 1686 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,440 psi | 71% | 2795 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,358 psi | 80% | 2890 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 45,411 psi | 71% | 2812 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,494 psi | 62% | 2674 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 39,146 psi | 61% | 2766 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 98% | 38,812 psi | 61% | 2802 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 48,950 psi | 77% | 2838 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,384 psi | 74% | 2831 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 30,748 psi | 48% | 2480 fps | 96.5% |
| Norma 204 | <<locked>> | 80% | 45,585 psi | 71% | 2838 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 31,734 psi | 50% | 2638 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 37,304 psi | 58% | 2746 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 46,702 psi | 73% | 2851 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 38,725 psi | 61% | 2769 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 45,469 psi | 71% | 2848 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 32,169 psi | 50% | 2582 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,456 psi | 45% | 1729 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,761 psi | 75% | 2887 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,803 psi | 72% | 2904 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,372 psi | 51% | 2661 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 41,930 psi | 66% | 2884 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 41,060 psi | 64% | 2717 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 80% | 39,146 psi | 61% | 2720 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 50,038 psi | 78% | 2867 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,950 psi | 77% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,384 psi | 74% | 2831 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,993 psi | 75% | 2785 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,812 psi | 61% | 2713 fps | 96.8% |
| Somchem S361 | <<locked>> | 80% | 41,713 psi | 65% | 2703 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 43,758 psi | 69% | 2802 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,682 psi | 62% | 2700 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 52,040 psi | 82% | 2835 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,196 psi | 76% | 2844 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,476 psi | 54% | 2572 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 47,529 psi | 74% | 2848 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,566 psi | 60% | 2717 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 40,190 psi | 63% | 2799 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 88% | 40,524 psi | 64% | 2792 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 94% | 43,265 psi | 68% | 2897 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,253 psi | 74% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,414 psi | 77% | 2920 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,516 psi | 48% | 2661 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,216 psi | 57% | 2621 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 73 powders for 7 x 66 SE v. Hofe loaded with the .284 | 154gr | Reichenberg HDB Universal. Hodgdon Retumbo delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 1,890 fps to 3,215 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 154.0 gr projectile in 0.284" calls for a 1:10.0 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. Accurate High Country, Alliant Reloder-26, Hodgdon Retumbo rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 154gr | Reichenberg HDB Universal 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.