Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 140gr | Nosler Ballistic Tip Hunting bullet and 76 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 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% | 57,595 psi | 90% | 3136 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,897 psi | 86% | 3114 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,172 psi | 86% | 3232 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 94% | 56,072 psi | 88% | 3232 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 82% | 56,101 psi | 88% | 3077 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,840 psi | 88% | 3173 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 57,479 psi | 90% | 3238 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,037 psi | 75% | 3051 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,859 psi | 67% | 3009 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,406 psi | 90% | 3100 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,782 psi | 87% | 3176 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,174 psi | 90% | 3192 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,419 psi | 87% | 3159 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,348 psi | 90% | 3232 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,766 psi | 86% | 3146 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3202 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,027 psi | 86% | 3235 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,246 psi | 88% | 3212 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,922 psi | 78% | 3130 fps | 98% |
| Bofors RP5 | <<locked>> | 96% | 57,348 psi | 90% | 3232 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 57,450 psi | 90% | 3117 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,011 psi | 83% | 3153 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 86% | 56,811 psi | 89% | 3173 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 55,796 psi | 87% | 3127 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 57,435 psi | 90% | 3169 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,188 psi | 88% | 3153 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,275 psi | 88% | 3094 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,939 psi | 83% | 3274 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 86% | 57,551 psi | 90% | 3215 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 58% | 1978 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,506 psi | 87% | 3100 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,390 psi | 87% | 3084 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 55,303 psi | 87% | 3104 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,795 psi | 86% | 3094 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 55,172 psi | 86% | 3209 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 56,028 psi | 88% | 3084 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,172 psi | 85% | 3077 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,882 psi | 86% | 3094 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,550 psi | 89% | 3159 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 38,377 psi | 60% | 2927 fps | 97% |
| Norma MRP | <<locked>> | 94% | 57,290 psi | 90% | 3258 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 57,217 psi | 90% | 3156 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,753 psi | 87% | 3232 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 55,956 psi | 88% | 3159 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,172 psi | 85% | 3159 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 59% | 2024 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,710 psi | 89% | 3179 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,998 psi | 86% | 3140 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,203 psi | 90% | 3228 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 3268 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 3136 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 82% | 55,317 psi | 87% | 3064 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,159 psi | 90% | 3140 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 54,752 psi | 86% | 3146 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 57,450 psi | 90% | 3117 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,028 psi | 88% | 3084 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,172 psi | 85% | 3077 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,666 psi | 89% | 3123 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,100 psi | 86% | 2930 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,434 psi | 87% | 3035 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,317 psi | 85% | 3143 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 54,969 psi | 86% | 3058 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,216 psi | 87% | 3071 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 57,653 psi | 90% | 3159 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,303 psi | 87% | 3117 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 56,173 psi | 88% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,187 psi | 86% | 3087 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,042 psi | 86% | 3097 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 86% | 54,563 psi | 86% | 3094 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,942 psi | 89% | 3173 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,087 psi | 89% | 3251 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 3219 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,868 psi | 86% | 3045 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,811 psi | 89% | 3173 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,173 psi | 88% | 3287 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,419 psi | 87% | 3114 fps | 99.2% |
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% | 33,315 psi | 52% | 2657 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 44,759 psi | 70% | 2936 fps | 99.9% |
| Accurate High Country | 67.6 gr | 84% | 41,510 psi | 65% | 2956 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 88% | 45,339 psi | 71% | 3025 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 52,750 psi | 83% | 3022 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,929 psi | 63% | 2854 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 88% | 43,656 psi | 68% | 2969 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 96% | 42,119 psi | 66% | 2923 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 92% | 33,054 psi | 52% | 2746 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,983 psi | 85% | 3045 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,844 psi | 67% | 2943 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,458 psi | 78% | 3071 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,376 psi | 59% | 2789 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,101 psi | 60% | 2848 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,995 psi | 50% | 2690 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,805 psi | 47% | 2641 fps | 95.4% |
| Alliant Reloder-26 | 66.3 gr | 80% | 34,809 psi | 55% | 2825 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 37,782 psi | 59% | 2838 fps | 95.1% |
| Bofors RP30 | <<locked>> | 94% | 40,596 psi | 64% | 2936 fps | 95.5% |
| Bofors RP5 | <<locked>> | 84% | 38,101 psi | 60% | 2848 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 47,659 psi | 75% | 2943 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 40,306 psi | 63% | 2887 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 46,398 psi | 73% | 2986 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 49,052 psi | 77% | 3005 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 46,804 psi | 73% | 2979 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,803 psi | 72% | 2959 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,451 psi | 63% | 2822 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,840 psi | 59% | 2927 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 45,890 psi | 72% | 3009 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,673 psi | 43% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,134 psi | 68% | 2867 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,979 psi | 77% | 2969 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 42,627 psi | 67% | 2877 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,368 psi | 71% | 2913 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 88% | 41,974 psi | 66% | 2946 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 46,586 psi | 73% | 2917 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 44,802 psi | 70% | 2900 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 30,618 psi | 48% | 2582 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 43,004 psi | 67% | 2904 fps | 96.7% |
| Norma 217 | <<locked>> | 98% | 35,926 psi | 56% | 2861 fps | 96% |
| Norma MRP | <<locked>> | 80% | 34,708 psi | 54% | 2789 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 43,859 psi | 69% | 2923 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 41,669 psi | 65% | 2949 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 42,757 psi | 67% | 2913 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 88% | 37,362 psi | 59% | 2822 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,268 psi | 44% | 1811 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,518 psi | 82% | 3117 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,759 psi | 70% | 2959 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,844 psi | 67% | 2969 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,766 psi | 54% | 2831 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,947 psi | 70% | 3058 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 51,648 psi | 81% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,423 psi | 65% | 2838 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 82% | 39,247 psi | 62% | 2835 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 47,659 psi | 75% | 2943 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,586 psi | 73% | 2917 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 44,802 psi | 70% | 2900 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,055 psi | 83% | 3068 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,924 psi | 81% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,643 psi | 72% | 2861 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,914 psi | 61% | 2828 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 51,619 psi | 81% | 3005 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,078 psi | 71% | 2884 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 40,915 psi | 64% | 2877 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,304 psi | 58% | 2759 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 80% | 49,284 psi | 77% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,353 psi | 71% | 2920 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 36,883 psi | 58% | 2740 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 44,875 psi | 70% | 2923 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 35,853 psi | 56% | 2769 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 86% | 43,091 psi | 68% | 2979 fps | 95% |
| Vihtavuori N565 | <<locked>> | 92% | 43,149 psi | 68% | 2963 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,454 psi | 70% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,572 psi | 73% | 2989 fps | 98.9% |
| Winchester StaBALL HD | 63.7 gr | 80% | 28,355 psi | 44% | 2690 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,117 psi | 61% | 2799 fps | 95.7% |
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 83 powders for 7 x 66 SE v. Hofe loaded with the .284 | 140gr | Nosler Ballistic Tip Hunting. Winchester StaBALL HD delivers the highest muzzle velocity at 3,287 fps; across all powders the maximum-charge window runs from 1,978 fps to 3,287 fps. ADI AR 2217 gives the best case fill at 100 %, and 83 of the 83 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 140.0 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, 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 High Country, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 140gr | Nosler Ballistic Tip Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, IMR 8133 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.