Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 130gr | Speer Soft Point bullet and 75 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 Accurate High Country.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 56,942 psi | 89% | 3228 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,534 psi | 85% | 3215 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,491 psi | 85% | 3323 fps | 98% |
| Accurate MAGPRO | <<locked>> | 94% | 55,622 psi | 87% | 3327 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 55,608 psi | 87% | 3179 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,332 psi | 87% | 3268 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 56,971 psi | 89% | 3333 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,688 psi | 75% | 3140 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,453 psi | 67% | 3091 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,029 psi | 89% | 3205 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,448 psi | 87% | 3281 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,608 psi | 89% | 3294 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,853 psi | 86% | 3255 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,855 psi | 89% | 3327 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,230 psi | 85% | 3245 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 3297 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,549 psi | 85% | 3333 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,767 psi | 87% | 3307 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,661 psi | 78% | 3222 fps | 97.5% |
| Bofors RP5 | <<locked>> | 96% | 56,855 psi | 89% | 3327 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 57,043 psi | 89% | 3219 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 3245 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 86% | 56,289 psi | 88% | 3271 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 55,317 psi | 87% | 3225 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 57,029 psi | 89% | 3268 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,883 psi | 88% | 3248 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,535 psi | 87% | 3189 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,431 psi | 82% | 3363 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 56,898 psi | 89% | 3310 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 58% | 2064 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,085 psi | 86% | 3199 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,114 psi | 86% | 3186 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 54,795 psi | 86% | 3205 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,331 psi | 85% | 3186 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 96% | 54,708 psi | 86% | 3304 fps | 98% |
| Lovex S065 | <<locked>> | 86% | 55,651 psi | 87% | 3186 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,217 psi | 90% | 3232 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,317 psi | 85% | 3186 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 56,072 psi | 88% | 3255 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 37,898 psi | 59% | 2999 fps | 96.1% |
| Norma MRP | <<locked>> | 94% | 56,666 psi | 89% | 3350 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 56,550 psi | 89% | 3255 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,288 psi | 87% | 3323 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 55,521 psi | 87% | 3255 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 53,664 psi | 84% | 3251 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 2113 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,999 psi | 88% | 3281 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,563 psi | 86% | 3238 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,681 psi | 89% | 3327 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,301 psi | 84% | 3363 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 54,650 psi | 86% | 3163 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,695 psi | 89% | 3238 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 92% | 54,447 psi | 85% | 3245 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 57,043 psi | 89% | 3219 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,651 psi | 87% | 3186 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,217 psi | 90% | 3232 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,202 psi | 88% | 3225 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,781 psi | 86% | 3035 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,868 psi | 86% | 3130 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,725 psi | 90% | 3304 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 54,375 psi | 85% | 3156 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,665 psi | 86% | 3159 fps | 97.2% |
| Somchem S365 | <<locked>> | 90% | 56,927 psi | 89% | 3258 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,897 psi | 86% | 3212 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 55,608 psi | 87% | 3127 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,839 psi | 86% | 3189 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,418 psi | 85% | 3189 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 88% | 57,595 psi | 90% | 3251 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,565 psi | 89% | 3274 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,536 psi | 89% | 3343 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,463 psi | 88% | 3317 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,520 psi | 85% | 3143 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,521 psi | 89% | 3278 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,419 psi | 87% | 3383 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,027 psi | 86% | 3205 fps | 98.8% |
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% | 33,025 psi | 52% | 2733 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 44,396 psi | 70% | 3028 fps | 99.7% |
| Accurate High Country | 72.3 gr | 86% | 44,135 psi | 69% | 3110 fps | 95.5% |
| Accurate MAGPRO | 77.1 gr | 90% | 48,254 psi | 76% | 3182 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 52,373 psi | 82% | 3123 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,552 psi | 62% | 2940 fps | 95% |
| ADI AR 2213 | <<locked>> | 90% | 46,354 psi | 73% | 3127 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 44,556 psi | 70% | 3071 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 94% | 34,838 psi | 55% | 2881 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,461 psi | 84% | 3150 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,453 psi | 67% | 3038 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,008 psi | 77% | 3169 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,610 psi | 62% | 2936 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,335 psi | 63% | 2995 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,647 psi | 50% | 2769 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,473 psi | 49% | 2779 fps | 95.5% |
| Alliant Reloder-26 | 69.3 gr | 80% | 34,505 psi | 54% | 2904 fps | 97.7% |
| Bofors RP15 | <<locked>> | 88% | 39,972 psi | 63% | 2982 fps | 95.2% |
| Bofors RP30 | <<locked>> | 96% | 43,033 psi | 67% | 3084 fps | 95.7% |
| Bofors RP5 | <<locked>> | 86% | 40,335 psi | 63% | 2995 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 47,268 psi | 74% | 3035 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 42,786 psi | 67% | 3035 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 45,934 psi | 72% | 3077 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 48,646 psi | 76% | 3100 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 46,282 psi | 73% | 3064 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,660 psi | 76% | 3114 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,074 psi | 63% | 2910 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 40,030 psi | 63% | 3074 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 45,556 psi | 71% | 3097 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,572 psi | 43% | 1847 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,685 psi | 67% | 2953 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,573 psi | 76% | 3064 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 42,134 psi | 66% | 2966 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,877 psi | 75% | 3061 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 90% | 44,440 psi | 70% | 3094 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 46,209 psi | 72% | 3012 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 44,527 psi | 70% | 2995 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 32,314 psi | 51% | 2717 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 42,714 psi | 67% | 2992 fps | 96% |
| Norma 217 | <<locked>> | 98% | 35,563 psi | 56% | 2933 fps | 95% |
| Norma MRP | <<locked>> | 82% | 36,796 psi | 58% | 2936 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 43,598 psi | 68% | 3015 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 44,367 psi | 70% | 3104 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 42,453 psi | 67% | 3002 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 88% | 36,883 psi | 58% | 2894 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 44% | 1890 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,996 psi | 81% | 3219 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,164 psi | 69% | 3045 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,583 psi | 67% | 3061 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,927 psi | 58% | 2979 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 51,358 psi | 80% | 3110 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,714 psi | 69% | 2982 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 38,856 psi | 61% | 2920 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 47,268 psi | 74% | 3035 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,209 psi | 72% | 3012 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 44,527 psi | 70% | 2995 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,736 psi | 83% | 3169 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,532 psi | 81% | 2986 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,179 psi | 71% | 2949 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 41,249 psi | 65% | 2979 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 51,227 psi | 80% | 3104 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,892 psi | 75% | 3035 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 40,364 psi | 63% | 2966 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,970 psi | 58% | 2841 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 49,037 psi | 77% | 3022 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,020 psi | 71% | 3012 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 39,059 psi | 61% | 2881 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 44,454 psi | 70% | 3015 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 35,418 psi | 56% | 2851 fps | 98.6% |
| Vihtavuori N560 | <<locked>> | 88% | 45,847 psi | 72% | 3133 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 94% | 45,818 psi | 72% | 3110 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,179 psi | 69% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,093 psi | 72% | 3081 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,137 psi | 44% | 2759 fps | 98.4% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,568 psi | 65% | 2946 fps | 95.9% |
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 81 powders for 7 x 66 SE v. Hofe loaded with the .284 | 130gr | Speer Soft Point. Winchester StaBALL HD delivers the highest muzzle velocity at 3,383 fps; across all powders the maximum-charge window runs from 2,064 fps to 3,383 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 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 130.0 gr projectile in 0.284" calls for a 1:14.0 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, Accurate High Country rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 130gr | Speer Soft Point they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, Vihtavuori N170, Vihtavuori N570 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.