Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .283 | 140gr | Frontier PH HPBT 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 MAGPRO, Alliant Reloder-26 and Ramshot Grand.
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% | 56,971 psi | 89% | 3127 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,694 psi | 86% | 3110 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,534 psi | 85% | 3222 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 94% | 55,492 psi | 87% | 3222 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 55,637 psi | 87% | 3068 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,463 psi | 87% | 3166 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 56,884 psi | 89% | 3228 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,529 psi | 74% | 3041 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,409 psi | 66% | 3002 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,521 psi | 87% | 3159 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,159 psi | 90% | 3094 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,288 psi | 87% | 3169 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,666 psi | 89% | 3186 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,824 psi | 86% | 3150 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,710 psi | 89% | 3222 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,114 psi | 85% | 3136 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,577 psi | 84% | 3196 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,360 psi | 85% | 3225 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,637 psi | 87% | 3202 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,545 psi | 78% | 3123 fps | 97.9% |
| Bofors RP5 | <<locked>> | 96% | 56,710 psi | 89% | 3222 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 57,072 psi | 89% | 3110 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 3143 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 86% | 56,391 psi | 88% | 3166 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 55,361 psi | 87% | 3117 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 56,797 psi | 89% | 3159 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,840 psi | 88% | 3143 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,825 psi | 87% | 3087 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,402 psi | 82% | 3261 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 56,898 psi | 89% | 3202 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1975 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,114 psi | 86% | 3091 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,187 psi | 86% | 3081 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 54,868 psi | 86% | 3097 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,476 psi | 85% | 3087 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 54,534 psi | 85% | 3199 fps | 98.3% |
| Lovex S065 | <<locked>> | 86% | 55,651 psi | 87% | 3077 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,435 psi | 90% | 3130 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 3084 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,144 psi | 88% | 3150 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 37,884 psi | 59% | 2913 fps | 96.8% |
| Norma MRP | <<locked>> | 94% | 56,652 psi | 89% | 3248 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 56,768 psi | 89% | 3150 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,361 psi | 87% | 3222 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 55,579 psi | 87% | 3153 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,563 psi | 84% | 3150 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 2021 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,173 psi | 88% | 3173 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,578 psi | 86% | 3133 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,768 psi | 89% | 3225 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,098 psi | 83% | 3258 fps | 100% |
| Rottweil R 903 | <<locked>> | 82% | 54,824 psi | 86% | 3058 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,797 psi | 89% | 3133 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 54,302 psi | 85% | 3136 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 57,072 psi | 89% | 3110 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,651 psi | 87% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,435 psi | 90% | 3130 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,231 psi | 88% | 3117 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,882 psi | 86% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,027 psi | 86% | 3028 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,551 psi | 90% | 3196 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 54,491 psi | 85% | 3051 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,694 psi | 86% | 3061 fps | 97.6% |
| Somchem S365 | <<locked>> | 90% | 56,913 psi | 89% | 3150 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,926 psi | 86% | 3110 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 55,724 psi | 87% | 3018 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,998 psi | 86% | 3084 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,433 psi | 85% | 3087 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 86% | 54,157 psi | 85% | 3087 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,536 psi | 89% | 3169 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,449 psi | 88% | 3238 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 3215 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,491 psi | 85% | 3038 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,391 psi | 88% | 3166 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,448 psi | 87% | 3278 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,839 psi | 86% | 3100 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% | 33,112 psi | 52% | 2651 fps | 96.3% |
| Accurate 4350 | <<locked>> | 80% | 44,498 psi | 70% | 2930 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 41,104 psi | 64% | 2949 fps | 95.1% |
| Accurate MAGPRO | 73.3 gr | 90% | 48,225 psi | 76% | 3087 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 52,504 psi | 82% | 3018 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,566 psi | 62% | 2848 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 43,308 psi | 68% | 2963 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 96% | 41,611 psi | 65% | 2913 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 94% | 34,940 psi | 55% | 2802 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,001 psi | 63% | 2851 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,693 psi | 84% | 3041 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,569 psi | 67% | 2940 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,197 psi | 77% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,668 psi | 62% | 2844 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,710 psi | 59% | 2838 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,633 psi | 50% | 2680 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,515 psi | 46% | 2631 fps | 95.2% |
| Alliant Reloder-26 | 65.9 gr | 80% | 34,577 psi | 54% | 2822 fps | 98.3% |
| Bofors RP15 | <<locked>> | 88% | 40,161 psi | 63% | 2897 fps | 96% |
| Bofors RP30 | <<locked>> | 94% | 40,263 psi | 63% | 2930 fps | 95.3% |
| Bofors RP5 | <<locked>> | 84% | 37,710 psi | 59% | 2838 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 47,253 psi | 74% | 2933 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 39,842 psi | 62% | 2874 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 46,166 psi | 72% | 2979 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 48,631 psi | 76% | 2995 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 46,456 psi | 73% | 2972 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,426 psi | 71% | 2949 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,176 psi | 63% | 2815 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,521 psi | 59% | 2917 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 45,498 psi | 71% | 2999 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 43% | 1765 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,728 psi | 67% | 2858 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,573 psi | 76% | 2959 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 42,380 psi | 66% | 2874 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,005 psi | 71% | 2904 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 88% | 41,626 psi | 65% | 2936 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 46,166 psi | 72% | 2910 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 44,556 psi | 70% | 2897 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 30,385 psi | 48% | 2575 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 42,786 psi | 67% | 2897 fps | 96.5% |
| Norma 217 | <<locked>> | 98% | 35,462 psi | 56% | 2848 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 34,374 psi | 54% | 2779 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 43,642 psi | 68% | 2917 fps | 99.8% |
| Ramshot Grand | 69.7 gr | 88% | 41,292 psi | 65% | 2940 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 42,540 psi | 67% | 2910 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 36,898 psi | 58% | 2812 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,181 psi | 44% | 1808 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,243 psi | 82% | 3114 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,309 psi | 69% | 2949 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,656 psi | 67% | 2966 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,360 psi | 54% | 2818 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 51,401 psi | 81% | 3002 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,816 psi | 69% | 2890 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 38,870 psi | 61% | 2825 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 47,253 psi | 74% | 2933 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,166 psi | 72% | 2910 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 44,556 psi | 70% | 2897 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,823 psi | 83% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,474 psi | 81% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,252 psi | 71% | 2851 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,522 psi | 60% | 2822 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 51,184 psi | 80% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,773 psi | 70% | 2874 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 40,437 psi | 63% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,941 psi | 58% | 2749 fps | 96% |
| Vihtavuori N150 | <<locked>> | 80% | 49,037 psi | 77% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,107 psi | 71% | 2913 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 36,506 psi | 57% | 2730 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 44,483 psi | 70% | 2913 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 35,578 psi | 56% | 2766 fps | 99% |
| Vihtavuori N560 | <<locked>> | 88% | 45,818 psi | 72% | 3038 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 92% | 42,815 psi | 67% | 2956 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,077 psi | 69% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,166 psi | 72% | 2979 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,195 psi | 44% | 2684 fps | 99% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,754 psi | 61% | 2789 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 76 powders for 7 x 66 SE v. Hofe loaded with the .283 | 140gr | Frontier PH HPBT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,278 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,278 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 0.283" calls for a 1:10.0 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 MAGPRO, Alliant Reloder-26, Ramshot Grand rank at the top here: for 7 x 66 SE v. Hofe with the .283 | 140gr | Frontier PH HPBT 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.