Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 120gr | Barnes X BT bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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% | 56,362 psi | 88% | 3307 fps | 99.7% |
| Accurate 4350 | <<locked>> | 88% | 57,682 psi | 90% | 3363 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 57,043 psi | 89% | 3458 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 54,882 psi | 86% | 3258 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,450 psi | 90% | 3396 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 55,347 psi | 87% | 3389 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,032 psi | 66% | 3150 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,289 psi | 88% | 3291 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,232 psi | 90% | 3412 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,071 psi | 86% | 3373 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,072 psi | 89% | 3379 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,245 psi | 87% | 3392 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,217 psi | 88% | 3376 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 3366 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,826 psi | 89% | 3474 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,462 psi | 85% | 3373 fps | 98.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 3284 fps | 96.2% |
| Bofors RP5 | <<locked>> | 96% | 55,245 psi | 87% | 3392 fps | 98.3% |
| Bofors RP7 | <<locked>> | 86% | 56,449 psi | 88% | 3294 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,256 psi | 80% | 3291 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 57,609 psi | 90% | 3327 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,201 psi | 87% | 3343 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 84% | 54,360 psi | 85% | 3294 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 94% | 55,376 psi | 87% | 3320 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,273 psi | 85% | 3301 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,578 psi | 86% | 3271 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,097 psi | 80% | 3419 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 86% | 55,376 psi | 87% | 3376 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,072 psi | 58% | 2133 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,479 psi | 90% | 3323 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,450 psi | 90% | 3314 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 57,580 psi | 90% | 3343 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,608 psi | 89% | 3307 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 98% | 56,710 psi | 89% | 3425 fps | 97.4% |
| Lovex S065 | <<locked>> | 86% | 55,216 psi | 87% | 3264 fps | 99.7% |
| Lovex S070 | <<locked>> | 88% | 56,739 psi | 89% | 3314 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,867 psi | 84% | 3264 fps | 99.5% |
| Norma 204 | <<locked>> | 88% | 54,926 psi | 86% | 3323 fps | 97.9% |
| Norma MRP | <<locked>> | 94% | 55,187 psi | 86% | 3422 fps | 99.3% |
| Norma URP | <<locked>> | 88% | 55,709 psi | 87% | 3337 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,667 psi | 90% | 3448 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 88% | 54,462 psi | 85% | 3333 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3376 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,869 psi | 59% | 2182 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,116 psi | 90% | 3304 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,244 psi | 85% | 3363 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,246 psi | 90% | 3376 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,085 psi | 86% | 3399 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,866 psi | 81% | 3415 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 82% | 54,563 psi | 86% | 3255 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,419 psi | 87% | 3297 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 94% | 56,840 psi | 89% | 3373 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 86% | 56,449 psi | 88% | 3294 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,216 psi | 87% | 3264 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 56,739 psi | 89% | 3314 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,288 psi | 87% | 3310 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,493 psi | 90% | 3166 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,549 psi | 85% | 3205 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,376 psi | 88% | 3366 fps | 98.4% |
| Somchem S355 | <<locked>> | 84% | 57,435 psi | 90% | 3301 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,421 psi | 90% | 3284 fps | 96.7% |
| Somchem S365 | <<locked>> | 90% | 55,724 psi | 87% | 3340 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,566 psi | 90% | 3343 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 84% | 55,042 psi | 86% | 3212 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,406 psi | 90% | 3323 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,855 psi | 89% | 3314 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 88% | 56,811 psi | 89% | 3330 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,579 psi | 87% | 3356 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,013 psi | 86% | 3406 fps | 96.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,056 psi | 86% | 3376 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,927 psi | 89% | 3274 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,448 psi | 87% | 3350 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,826 psi | 89% | 3520 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,290 psi | 90% | 3330 fps | 98.4% |
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>> | 82% | 36,114 psi | 57% | 2887 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 44,556 psi | 70% | 3117 fps | 99.3% |
| Accurate High Country | <<locked>> | 88% | 46,514 psi | 73% | 3248 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 51,532 psi | 81% | 3199 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 44,701 psi | 70% | 3140 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 48,762 psi | 76% | 3255 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 39,566 psi | 62% | 3084 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,084 psi | 83% | 3235 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,003 psi | 66% | 3110 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,037 psi | 75% | 3248 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 44,541 psi | 70% | 3133 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 42,815 psi | 67% | 3133 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,995 psi | 50% | 2851 fps | 97.9% |
| Alliant Reloder-25 | <<locked>> | 86% | 33,982 psi | 53% | 2923 fps | 95.5% |
| Alliant Reloder-26 | 67.8 gr | 80% | 34,650 psi | 54% | 2989 fps | 96.8% |
| Bofors RP15 | <<locked>> | 92% | 45,078 psi | 71% | 3182 fps | 95.8% |
| Bofors RP30 | <<locked>> | 98% | 45,324 psi | 71% | 3215 fps | 95.3% |
| Bofors RP5 | <<locked>> | 88% | 42,815 psi | 67% | 3133 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 47,021 psi | 74% | 3107 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 96% | 45,165 psi | 71% | 3159 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 54,128 psi | 85% | 3268 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 45,440 psi | 71% | 3150 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 48,008 psi | 75% | 3169 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 51,895 psi | 81% | 3255 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 51,082 psi | 80% | 3238 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,769 psi | 62% | 2989 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 42,221 psi | 66% | 3202 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 44,759 psi | 70% | 3166 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 44% | 1913 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,496 psi | 67% | 3028 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,950 psi | 75% | 3133 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 42,279 psi | 66% | 3051 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 50,227 psi | 79% | 3189 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 94% | 49,966 psi | 78% | 3294 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 46,108 psi | 72% | 3091 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 44,541 psi | 70% | 3074 fps | 97.5% |
| Lovex S071 | <<locked>> | 86% | 35,288 psi | 55% | 2864 fps | 95.5% |
| Norma 204 | <<locked>> | 82% | 45,165 psi | 71% | 3127 fps | 95.6% |
| Norma MRP | 69.1 gr | 84% | 39,334 psi | 62% | 3081 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 43,265 psi | 68% | 3094 fps | 99% |
| Ramshot Grand | <<locked>> | 92% | 46,862 psi | 73% | 3235 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 42,119 psi | 66% | 3077 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 42,293 psi | 66% | 3100 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 45% | 1959 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,548 psi | 84% | 3241 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,749 psi | 80% | 3304 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,990 psi | 69% | 3127 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,047 psi | 66% | 3130 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 39,508 psi | 62% | 3117 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 51,169 psi | 80% | 3196 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 49,037 psi | 77% | 3176 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 43,961 psi | 69% | 3120 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 47,021 psi | 74% | 3107 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,108 psi | 72% | 3091 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 80% | 44,541 psi | 70% | 3074 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,938 psi | 81% | 3251 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,039 psi | 80% | 3068 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,194 psi | 71% | 3025 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 43,569 psi | 68% | 3110 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 50,894 psi | 80% | 3189 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 50,502 psi | 79% | 3159 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 40,219 psi | 63% | 3054 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 39,639 psi | 62% | 2979 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 48,689 psi | 76% | 3104 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,657 psi | 70% | 3087 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 41,452 psi | 65% | 3012 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 44,280 psi | 69% | 3094 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 35,984 psi | 56% | 2946 fps | 98% |
| Vihtavuori N560 | 75.7 gr | 92% | 51,387 psi | 81% | 3333 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 48,370 psi | 76% | 3248 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,569 psi | 68% | 3041 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,629 psi | 72% | 3153 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,892 psi | 45% | 2851 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 88% | 44,034 psi | 69% | 3077 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 81 powders for 7 x 66 SE v. Hofe loaded with the .284 | 120gr | Barnes X BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,520 fps; across all powders the maximum-charge window runs from 2,133 fps to 3,520 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 120.0 gr projectile in 0.284" calls for a 1:11.5 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 120gr | Barnes X BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, 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.