Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 162gr | Hornady BTHP bullet and 72 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% | 54,766 psi | 86% | 2897 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,825 psi | 87% | 2923 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,363 psi | 90% | 3061 fps | 99% |
| ADI AR 2209 | <<locked>> | 90% | 56,739 psi | 89% | 2989 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 54,563 psi | 86% | 2995 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,446 psi | 82% | 2956 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,949 psi | 74% | 2920 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,782 psi | 89% | 2982 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,000 psi | 89% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,101 psi | 88% | 2976 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,766 psi | 86% | 2992 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,144 psi | 88% | 2956 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,506 psi | 87% | 3025 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,681 psi | 89% | 3051 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,028 psi | 88% | 2956 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 57,653 psi | 90% | 3038 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,172 psi | 86% | 3028 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 54,766 psi | 86% | 2992 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 54,302 psi | 85% | 2867 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 54,157 psi | 85% | 2986 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 57,493 psi | 90% | 2979 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,202 psi | 88% | 2936 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 54,302 psi | 85% | 2930 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,971 psi | 89% | 2972 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,116 psi | 90% | 2897 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,346 psi | 85% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,012 psi | 85% | 2959 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,391 psi | 59% | 1841 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,043 psi | 88% | 2913 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,651 psi | 87% | 2890 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,173 psi | 88% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,317 psi | 87% | 2913 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 56,202 psi | 88% | 3031 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,554 psi | 67% | 2825 fps | 97.6% |
| Lovex S065 | <<locked>> | 84% | 56,521 psi | 89% | 2890 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,824 psi | 86% | 2890 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,985 psi | 88% | 2913 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,029 psi | 89% | 2969 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 42,830 psi | 67% | 2851 fps | 99.3% |
| Norma MRP | <<locked>> | 90% | 54,708 psi | 86% | 3012 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,404 psi | 85% | 2907 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,305 psi | 90% | 3058 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 86% | 56,652 psi | 89% | 2966 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,506 psi | 87% | 2986 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,087 psi | 60% | 1880 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,086 psi | 88% | 2949 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,389 psi | 85% | 2979 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,056 psi | 86% | 3097 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3054 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 90% | 57,725 psi | 90% | 2956 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 90% | 55,724 psi | 87% | 2966 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 54,302 psi | 85% | 2867 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,521 psi | 89% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,824 psi | 86% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,608 psi | 87% | 2844 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,303 psi | 87% | 2959 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 55,463 psi | 87% | 2890 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 54,984 psi | 86% | 2907 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,333 psi | 88% | 2936 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,565 psi | 89% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,840 psi | 88% | 2894 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,796 psi | 87% | 2917 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 55,129 psi | 86% | 2904 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,679 psi | 86% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,404 psi | 85% | 3012 fps | 99% |
| Vihtavuori N565 | <<locked>> | 96% | 54,505 psi | 85% | 2992 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,143 psi | 86% | 3054 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 3045 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,288 psi | 87% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,740 psi | 90% | 2982 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,302 psi | 85% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,115 psi | 88% | 2933 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% | 36,753 psi | 58% | 2569 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 48,950 psi | 77% | 2815 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 40,263 psi | 63% | 2736 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 40,582 psi | 64% | 2694 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 82% | 38,783 psi | 61% | 2687 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 90% | 37,536 psi | 59% | 2654 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 86% | 29,805 psi | 47% | 2497 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,162 psi | 65% | 2700 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,775 psi | 73% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,770 psi | 64% | 2694 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,550 psi | 57% | 2635 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,186 psi | 55% | 2592 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,545 psi | 48% | 2510 fps | 97.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,856 psi | 61% | 2743 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,414 psi | 77% | 2838 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 34,040 psi | 53% | 2569 fps | 95.4% |
| Bofors RP30 | <<locked>> | 88% | 36,680 psi | 57% | 2671 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 36,550 psi | 57% | 2635 fps | 96.5% |
| Bofors RP7 | <<locked>> | 80% | 50,923 psi | 80% | 2812 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 35,897 psi | 56% | 2615 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 50,299 psi | 79% | 2867 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 52,736 psi | 83% | 2881 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 38,711 psi | 61% | 2631 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,683 psi | 64% | 2674 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,077 psi | 69% | 2697 fps | 100% |
| Hodgdon Retumbo | 61.8 gr | 82% | 31,908 psi | 50% | 2592 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 50,314 psi | 79% | 2897 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 44% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,354 psi | 73% | 2746 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,257 psi | 82% | 2838 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 46,427 psi | 73% | 2759 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,306 psi | 63% | 2631 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 82% | 37,376 psi | 59% | 2664 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,289 psi | 58% | 2703 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 49,835 psi | 78% | 2785 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,312 psi | 76% | 2782 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 31,647 psi | 50% | 2444 fps | 97.3% |
| Norma 204 | <<locked>> | 80% | 46,644 psi | 73% | 2792 fps | 98.7% |
| Norma 217 | <<locked>> | 90% | 30,589 psi | 48% | 2549 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 38,450 psi | 60% | 2707 fps | 98.4% |
| Norma URP | <<locked>> | 80% | 47,718 psi | 75% | 2799 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,072 psi | 58% | 2671 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 46,543 psi | 73% | 2799 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 30,806 psi | 48% | 2487 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,631 psi | 45% | 1683 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,776 psi | 76% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,079 psi | 74% | 2861 fps | 100% |
| ReloadSwiss RS 76 | 66.1 gr | 82% | 30,908 psi | 48% | 2562 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,074 psi | 63% | 2779 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 41,901 psi | 66% | 2674 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 80% | 40,089 psi | 63% | 2677 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 80% | 50,923 psi | 80% | 2812 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,835 psi | 78% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,312 psi | 76% | 2782 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,892 psi | 77% | 2736 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,755 psi | 62% | 2674 fps | 97.6% |
| Somchem S361 | <<locked>> | 80% | 42,699 psi | 67% | 2664 fps | 96.3% |
| Somchem S365 | <<locked>> | 80% | 44,875 psi | 70% | 2753 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,611 psi | 64% | 2657 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 80% | 53,026 psi | 83% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,255 psi | 77% | 2795 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,331 psi | 55% | 2536 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 80% | 48,559 psi | 76% | 2799 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,581 psi | 62% | 2671 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,508 psi | 60% | 2697 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 86% | 38,798 psi | 61% | 2690 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 92% | 41,437 psi | 65% | 2795 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 98% | 48,443 psi | 76% | 2976 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,225 psi | 76% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,546 psi | 79% | 2871 fps | 99.9% |
| Winchester StaBALL HD | 61.9 gr | 80% | 31,589 psi | 50% | 2628 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,115 psi | 58% | 2582 fps | 96.7% |
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 72 powders for 7 x 66 SE v. Hofe loaded with the .284 | 162gr | Hornady BTHP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,104 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 162.0 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, 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 | 162gr | Hornady BTHP 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.