Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 145gr | Brenneke Teilmantel 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, Hodgdon Retumbo 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% | 54,114 psi | 85% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,158 psi | 86% | 3077 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,767 psi | 87% | 3205 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 92% | 56,695 psi | 89% | 3205 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 90% | 55,956 psi | 88% | 3140 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 57,580 psi | 90% | 3205 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,967 psi | 81% | 3100 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,528 psi | 73% | 3058 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,217 psi | 88% | 3133 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,101 psi | 88% | 3136 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,188 psi | 90% | 3146 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,550 psi | 87% | 3123 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,725 psi | 90% | 3199 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,434 psi | 87% | 3110 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,853 psi | 86% | 3173 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,840 psi | 88% | 3202 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,434 psi | 87% | 3097 fps | 96.4% |
| Bofors RP15 | <<locked>> | 96% | 56,840 psi | 89% | 3186 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3173 fps | 99.2% |
| Bofors RP5 | <<locked>> | 94% | 57,725 psi | 90% | 3199 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 57,276 psi | 90% | 3077 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3192 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 56,855 psi | 89% | 3136 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,535 psi | 87% | 3087 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 57,435 psi | 90% | 3136 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,275 psi | 88% | 3120 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,362 psi | 88% | 3051 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,667 psi | 90% | 3317 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,435 psi | 90% | 3173 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 58% | 1965 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,347 psi | 87% | 3061 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,998 psi | 86% | 3045 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 55,622 psi | 87% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,636 psi | 86% | 3061 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 94% | 55,724 psi | 87% | 3182 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,003 psi | 66% | 2953 fps | 96.5% |
| Lovex S065 | <<locked>> | 84% | 55,738 psi | 87% | 3041 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,682 psi | 90% | 3097 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,535 psi | 87% | 3068 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,579 psi | 89% | 3123 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 42,192 psi | 66% | 2979 fps | 98.6% |
| Norma MRP | <<locked>> | 90% | 54,012 psi | 85% | 3159 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 57,276 psi | 90% | 3117 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,623 psi | 89% | 3205 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 56,188 psi | 88% | 3123 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,911 psi | 86% | 3133 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,130 psi | 60% | 2014 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,216 psi | 87% | 3100 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,566 psi | 90% | 3189 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,476 psi | 85% | 3245 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,534 psi | 84% | 3189 fps | 98% |
| Rottweil R 904 | <<locked>> | 90% | 57,058 psi | 89% | 3104 fps | 99% |
| Rottweil R 905 | <<locked>> | 90% | 55,216 psi | 87% | 3117 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 57,276 psi | 90% | 3077 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,738 psi | 87% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,682 psi | 90% | 3097 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,882 psi | 86% | 2992 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,795 psi | 86% | 3114 fps | 99.5% |
| Somchem S361 | <<locked>> | 88% | 54,940 psi | 86% | 3035 fps | 98.2% |
| Somchem S365 | <<locked>> | 86% | 54,143 psi | 85% | 3061 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,622 psi | 87% | 3084 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,898 psi | 88% | 2982 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,245 psi | 87% | 3048 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,216 psi | 87% | 3064 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 84% | 54,592 psi | 86% | 3058 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,638 psi | 90% | 3140 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,450 psi | 90% | 3219 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 57,653 psi | 90% | 3199 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3199 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,665 psi | 86% | 3002 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,855 psi | 89% | 3136 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,638 psi | 90% | 3255 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,506 psi | 87% | 3081 fps | 99.5% |
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% | 36,100 psi | 57% | 2690 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 48,153 psi | 75% | 2959 fps | 100% |
| Accurate High Country | 67 gr | 80% | 39,175 psi | 61% | 2864 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 86% | 45,876 psi | 72% | 3002 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 39,943 psi | 63% | 2825 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 40,915 psi | 64% | 2874 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 39,595 psi | 62% | 2838 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 88% | 31,328 psi | 49% | 2667 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,466 psi | 63% | 2828 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,963 psi | 72% | 2966 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,272 psi | 83% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,089 psi | 63% | 2822 fps | 96.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,969 psi | 56% | 2756 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,635 psi | 54% | 2720 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,052 psi | 47% | 2621 fps | 96.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,218 psi | 60% | 2871 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,083 psi | 82% | 3035 fps | 95.6% |
| Bofors RP15 | <<locked>> | 82% | 35,824 psi | 56% | 2753 fps | 95.1% |
| Bofors RP30 | <<locked>> | 90% | 38,711 psi | 61% | 2854 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 35,969 psi | 56% | 2756 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 50,386 psi | 79% | 2959 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 37,840 psi | 59% | 2799 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 49,734 psi | 78% | 3012 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 52,112 psi | 82% | 3028 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 43,787 psi | 69% | 2884 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,902 psi | 67% | 2867 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,381 psi | 68% | 2838 fps | 100% |
| Hodgdon Retumbo | 69.4 gr | 86% | 35,882 psi | 56% | 2841 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 49,647 psi | 78% | 3041 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 44% | 1759 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,759 psi | 72% | 2887 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,663 psi | 81% | 2986 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 45,716 psi | 72% | 2900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,395 psi | 66% | 2822 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 39,465 psi | 62% | 2854 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,218 psi | 61% | 2884 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 49,342 psi | 77% | 2933 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,703 psi | 75% | 2923 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 31,053 psi | 49% | 2559 fps | 96.1% |
| Norma 204 | <<locked>> | 80% | 46,050 psi | 72% | 2930 fps | 98% |
| Norma 217 | <<locked>> | 94% | 34,418 psi | 54% | 2782 fps | 96% |
| Norma MRP | <<locked>> | 80% | 37,724 psi | 59% | 2831 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 47,050 psi | 74% | 2946 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,102 psi | 61% | 2858 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 45,934 psi | 72% | 2943 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 34,969 psi | 55% | 2730 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,442 psi | 45% | 1798 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,225 psi | 76% | 2982 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,325 psi | 73% | 2999 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,663 psi | 51% | 2736 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,525 psi | 67% | 2969 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 41,365 psi | 65% | 2805 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 39,436 psi | 62% | 2805 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 80% | 50,386 psi | 79% | 2959 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,342 psi | 77% | 2933 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,703 psi | 75% | 2923 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,211 psi | 76% | 2877 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,102 psi | 61% | 2799 fps | 96.5% |
| Somchem S361 | <<locked>> | 80% | 42,148 psi | 66% | 2792 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 44,135 psi | 69% | 2894 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,045 psi | 63% | 2789 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 52,388 psi | 82% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,472 psi | 76% | 2936 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,693 psi | 54% | 2651 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 47,877 psi | 75% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,798 psi | 61% | 2799 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 84% | 43,497 psi | 68% | 2949 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 40,901 psi | 64% | 2877 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 96% | 47,166 psi | 74% | 3058 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,688 psi | 75% | 2894 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,734 psi | 78% | 3012 fps | 99.6% |
| Winchester StaBALL HD | 66.3 gr | 80% | 30,893 psi | 48% | 2743 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,666 psi | 57% | 2707 fps | 95.5% |
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 | 145gr | Brenneke Teilmantel. Hodgdon Retumbo delivers the highest muzzle velocity at 3,317 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,317 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 145.0 gr projectile in 0.284" calls for a 1:13.0 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, Hodgdon Retumbo, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 145gr | Brenneke Teilmantel 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.