Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 140gr | Nosler AccuBond 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% | 57,174 psi | 90% | 3127 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,969 psi | 86% | 3114 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,752 psi | 86% | 3225 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 94% | 55,941 psi | 88% | 3228 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 55,927 psi | 88% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,680 psi | 87% | 3169 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 57,072 psi | 89% | 3232 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,906 psi | 75% | 3051 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,569 psi | 67% | 3002 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,203 psi | 90% | 3097 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,579 psi | 87% | 3173 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,000 psi | 89% | 3189 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,259 psi | 87% | 3156 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,942 psi | 89% | 3225 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,331 psi | 85% | 3140 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,766 psi | 84% | 3202 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,839 psi | 86% | 3235 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,101 psi | 88% | 3212 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,734 psi | 78% | 3127 fps | 98% |
| Bofors RP5 | <<locked>> | 96% | 56,942 psi | 89% | 3225 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 57,261 psi | 90% | 3114 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 3150 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 86% | 56,623 psi | 89% | 3169 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 55,608 psi | 87% | 3123 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 57,290 psi | 90% | 3169 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,014 psi | 88% | 3146 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,072 psi | 88% | 3091 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,576 psi | 82% | 3264 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 86% | 57,130 psi | 90% | 3205 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1975 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,332 psi | 87% | 3097 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,201 psi | 87% | 3081 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 55,317 psi | 87% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,650 psi | 86% | 3091 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 55,027 psi | 86% | 3209 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 55,898 psi | 88% | 3081 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,667 psi | 90% | 3133 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,476 psi | 85% | 3087 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,391 psi | 88% | 3156 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 38,247 psi | 60% | 2920 fps | 96.9% |
| Norma MRP | <<locked>> | 94% | 57,101 psi | 89% | 3255 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 57,029 psi | 89% | 3153 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,593 psi | 87% | 3225 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 55,782 psi | 87% | 3156 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,027 psi | 85% | 3156 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 59% | 2021 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,478 psi | 89% | 3176 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,824 psi | 86% | 3133 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,029 psi | 89% | 3225 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 3264 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,225 psi | 76% | 3127 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 82% | 55,100 psi | 86% | 3061 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,000 psi | 89% | 3136 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 54,578 psi | 86% | 3143 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 57,261 psi | 90% | 3114 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,898 psi | 88% | 3081 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,667 psi | 90% | 3133 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,492 psi | 89% | 3120 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,940 psi | 86% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,230 psi | 87% | 3028 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,143 psi | 85% | 3136 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 54,752 psi | 86% | 3054 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,853 psi | 86% | 3064 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 57,450 psi | 90% | 3153 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,129 psi | 86% | 3114 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 55,970 psi | 88% | 3025 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,245 psi | 87% | 3087 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,650 psi | 86% | 3091 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 86% | 54,389 psi | 85% | 3091 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,768 psi | 89% | 3173 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,942 psi | 89% | 3245 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 3215 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,723 psi | 86% | 3041 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,884 psi | 89% | 3176 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,695 psi | 87% | 3281 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,288 psi | 87% | 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% | 33,185 psi | 52% | 2651 fps | 96.3% |
| Accurate 4350 | <<locked>> | 80% | 44,541 psi | 70% | 2933 fps | 99.9% |
| Accurate High Country | 67.4 gr | 84% | 41,336 psi | 65% | 2953 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 88% | 45,194 psi | 71% | 3025 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 52,562 psi | 82% | 3018 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,798 psi | 62% | 2854 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 88% | 43,497 psi | 68% | 2966 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 96% | 41,800 psi | 66% | 2917 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 92% | 32,953 psi | 52% | 2743 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,751 psi | 84% | 3045 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,641 psi | 67% | 2940 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,240 psi | 77% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,856 psi | 62% | 2848 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,942 psi | 59% | 2841 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,850 psi | 50% | 2687 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,660 psi | 46% | 2638 fps | 95.3% |
| Alliant Reloder-26 | 66.2 gr | 80% | 34,795 psi | 55% | 2828 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 37,637 psi | 59% | 2831 fps | 95% |
| Bofors RP30 | <<locked>> | 94% | 40,466 psi | 63% | 2933 fps | 95.4% |
| Bofors RP5 | <<locked>> | 84% | 37,942 psi | 59% | 2841 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 47,485 psi | 74% | 2940 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 40,190 psi | 63% | 2884 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 46,209 psi | 72% | 2982 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 48,863 psi | 77% | 3002 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 46,644 psi | 73% | 2976 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,643 psi | 72% | 2953 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,248 psi | 63% | 2818 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,710 psi | 59% | 2920 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 45,730 psi | 72% | 3005 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 43% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,975 psi | 67% | 2861 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,834 psi | 77% | 2966 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 42,424 psi | 66% | 2874 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,208 psi | 71% | 2910 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 88% | 41,829 psi | 66% | 2940 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 46,427 psi | 73% | 2913 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 44,773 psi | 70% | 2900 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 30,472 psi | 48% | 2575 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 42,815 psi | 67% | 2897 fps | 96.6% |
| Norma 217 | <<locked>> | 98% | 35,665 psi | 56% | 2854 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 34,548 psi | 54% | 2785 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 43,874 psi | 69% | 2923 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 41,524 psi | 65% | 2946 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 42,612 psi | 67% | 2910 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 37,043 psi | 58% | 2815 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 44% | 1808 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,301 psi | 82% | 3114 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,570 psi | 70% | 2953 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,888 psi | 67% | 2969 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,519 psi | 54% | 2822 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,802 psi | 70% | 3054 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 51,677 psi | 81% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,292 psi | 65% | 2835 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 39,117 psi | 61% | 2831 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 47,485 psi | 74% | 2940 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,427 psi | 73% | 2913 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 44,773 psi | 70% | 2900 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,852 psi | 83% | 3064 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,735 psi | 81% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,527 psi | 71% | 2858 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,769 psi | 61% | 2828 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 51,430 psi | 81% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,947 psi | 70% | 2881 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 40,698 psi | 64% | 2874 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,130 psi | 58% | 2753 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 80% | 49,313 psi | 77% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,165 psi | 71% | 2913 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 36,724 psi | 58% | 2733 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 44,715 psi | 70% | 2920 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 35,694 psi | 56% | 2766 fps | 99% |
| Vihtavuori N560 | <<locked>> | 86% | 42,931 psi | 67% | 2976 fps | 95% |
| Vihtavuori N565 | <<locked>> | 92% | 43,004 psi | 67% | 2959 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,295 psi | 69% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,427 psi | 73% | 2989 fps | 98.9% |
| Winchester StaBALL HD | 63.5 gr | 80% | 28,253 psi | 44% | 2687 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,957 psi | 61% | 2795 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 76 powders for 7 x 66 SE v. Hofe loaded with the .284 | 140gr | Nosler AccuBond. 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 76 of the 76 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 AccuBond 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.