Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .283 | 140gr | Rhino Penetrator bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country 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% | 57,101 psi | 89% | 3127 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,868 psi | 86% | 3114 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,665 psi | 86% | 3222 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 94% | 55,869 psi | 88% | 3225 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 55,811 psi | 87% | 3071 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,593 psi | 87% | 3169 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 57,000 psi | 89% | 3228 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,848 psi | 75% | 3048 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,511 psi | 67% | 3002 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,348 psi | 90% | 3097 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,463 psi | 87% | 3169 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,884 psi | 89% | 3189 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,187 psi | 86% | 3156 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,869 psi | 89% | 3222 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,244 psi | 85% | 3140 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,664 psi | 84% | 3199 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,752 psi | 86% | 3232 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,014 psi | 88% | 3209 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,661 psi | 78% | 3123 fps | 97.9% |
| Bofors RP5 | <<locked>> | 96% | 56,869 psi | 89% | 3222 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 57,217 psi | 90% | 3110 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,852 psi | 83% | 3146 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 86% | 56,536 psi | 89% | 3169 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 55,521 psi | 87% | 3120 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 57,159 psi | 90% | 3166 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,941 psi | 88% | 3143 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,970 psi | 88% | 3087 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,504 psi | 82% | 3264 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 57,058 psi | 89% | 3205 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,985 psi | 58% | 1975 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,245 psi | 87% | 3094 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,347 psi | 87% | 3081 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 55,216 psi | 87% | 3104 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,578 psi | 86% | 3087 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 54,882 psi | 86% | 3205 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 55,796 psi | 87% | 3077 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,566 psi | 90% | 3130 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,375 psi | 85% | 3084 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,304 psi | 88% | 3153 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 38,000 psi | 60% | 2917 fps | 96.8% |
| Norma MRP | <<locked>> | 94% | 56,782 psi | 89% | 3248 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 56,927 psi | 89% | 3150 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,521 psi | 87% | 3225 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 55,695 psi | 87% | 3153 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,969 psi | 85% | 3156 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 59% | 2021 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,362 psi | 88% | 3176 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,723 psi | 86% | 3133 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,942 psi | 89% | 3225 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,417 psi | 84% | 3264 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,124 psi | 75% | 3127 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 82% | 54,984 psi | 86% | 3061 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,913 psi | 89% | 3136 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 54,491 psi | 85% | 3140 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 57,217 psi | 90% | 3110 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,796 psi | 87% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,566 psi | 90% | 3130 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,391 psi | 88% | 3117 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,071 psi | 86% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,158 psi | 86% | 3028 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,056 psi | 85% | 3136 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 54,665 psi | 86% | 3054 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,795 psi | 86% | 3061 fps | 97.6% |
| Somchem S365 | <<locked>> | 90% | 57,348 psi | 90% | 3153 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,042 psi | 86% | 3110 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 55,898 psi | 88% | 3022 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,143 psi | 86% | 3087 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,578 psi | 86% | 3087 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 86% | 54,302 psi | 85% | 3091 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,666 psi | 89% | 3169 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,608 psi | 89% | 3241 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,463 psi | 88% | 3215 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,607 psi | 86% | 3041 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,782 psi | 89% | 3173 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,593 psi | 87% | 3281 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,187 psi | 86% | 3110 fps | 99.1% |
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% | 33,243 psi | 52% | 2654 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 44,628 psi | 70% | 2933 fps | 99.9% |
| Accurate High Country | 67.3 gr | 84% | 41,249 psi | 65% | 2949 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 90% | 48,385 psi | 76% | 3087 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 52,446 psi | 82% | 3015 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,711 psi | 62% | 2848 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 43,424 psi | 68% | 2963 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 96% | 41,742 psi | 65% | 2917 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 94% | 35,027 psi | 55% | 2805 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,650 psi | 84% | 3041 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,569 psi | 67% | 2936 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,371 psi | 77% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,813 psi | 62% | 2848 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,855 psi | 59% | 2841 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,778 psi | 50% | 2684 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,617 psi | 46% | 2635 fps | 95.3% |
| Alliant Reloder-26 | 66.1 gr | 80% | 34,737 psi | 54% | 2825 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 37,550 psi | 59% | 2831 fps | 95% |
| Bofors RP30 | <<locked>> | 94% | 40,393 psi | 63% | 2930 fps | 95.4% |
| Bofors RP5 | <<locked>> | 84% | 37,855 psi | 59% | 2841 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 47,384 psi | 74% | 2936 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 40,132 psi | 63% | 2881 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 46,340 psi | 73% | 2982 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 48,762 psi | 76% | 2999 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 46,572 psi | 73% | 2972 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,571 psi | 71% | 2953 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,161 psi | 63% | 2815 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,637 psi | 59% | 2917 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 45,643 psi | 72% | 3002 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,644 psi | 43% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,873 psi | 67% | 2861 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,733 psi | 76% | 2966 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 42,540 psi | 67% | 2874 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,136 psi | 71% | 2907 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 88% | 41,785 psi | 65% | 2940 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 46,340 psi | 73% | 2910 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 44,730 psi | 70% | 2897 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 30,530 psi | 48% | 2579 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 42,931 psi | 67% | 2900 fps | 96.6% |
| Norma 217 | <<locked>> | 98% | 35,549 psi | 56% | 2851 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 34,505 psi | 54% | 2785 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 43,816 psi | 69% | 2920 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 41,437 psi | 65% | 2943 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 42,685 psi | 67% | 2910 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 36,985 psi | 58% | 2812 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 44% | 1811 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,431 psi | 82% | 3117 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,498 psi | 70% | 2953 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,801 psi | 67% | 2969 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,476 psi | 54% | 2822 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,759 psi | 70% | 3054 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 51,561 psi | 81% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,205 psi | 65% | 2831 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 39,015 psi | 61% | 2831 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 47,384 psi | 74% | 2936 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,340 psi | 73% | 2910 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 44,730 psi | 70% | 2897 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,982 psi | 83% | 3064 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,663 psi | 81% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,411 psi | 71% | 2854 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,682 psi | 61% | 2822 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 51,343 psi | 80% | 2999 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,875 psi | 70% | 2877 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 40,611 psi | 64% | 2871 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,086 psi | 58% | 2753 fps | 96% |
| Vihtavuori N150 | <<locked>> | 80% | 49,211 psi | 77% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,281 psi | 71% | 2917 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 36,637 psi | 57% | 2733 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 44,643 psi | 70% | 2917 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 35,592 psi | 56% | 2766 fps | 99% |
| Vihtavuori N560 | <<locked>> | 88% | 45,963 psi | 72% | 3041 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 92% | 42,917 psi | 67% | 2956 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,251 psi | 69% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,340 psi | 73% | 2982 fps | 98.9% |
| Winchester StaBALL HD | 63.5 gr | 80% | 28,311 psi | 44% | 2687 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,899 psi | 61% | 2792 fps | 95.6% |
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 .283 | 140gr | Rhino Penetrator. Winchester StaBALL HD delivers the highest muzzle velocity at 3,281 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,281 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 0.283" calls for a 1:10.5 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. Alliant Reloder-26, Accurate High Country, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .283 | 140gr | Rhino Penetrator 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.