Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 120gr | Prvi Partizan HP bullet and 85 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 Norma MRP.
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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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 2700 | <<locked>> | 82% | 56,782 psi | 89% | 3274 fps | 98.9% |
| Accurate 3100 | <<locked>> | 98% | 56,826 psi | 89% | 3330 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 56,478 psi | 89% | 3261 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,491 psi | 85% | 3327 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,346 psi | 85% | 3422 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 96% | 55,259 psi | 87% | 3419 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 84% | 56,173 psi | 88% | 3297 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,448 psi | 87% | 3373 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 56,884 psi | 89% | 3428 fps | 97.4% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,637 psi | 87% | 3369 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,637 psi | 87% | 3369 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,363 psi | 90% | 3323 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,464 psi | 90% | 3350 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,143 psi | 86% | 3389 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,449 psi | 88% | 3409 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,911 psi | 86% | 3356 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,405 psi | 88% | 3425 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3402 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,516 psi | 78% | 3327 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,824 psi | 84% | 3435 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 3402 fps | 98.3% |
| Bofors RP3 | <<locked>> | 82% | 54,781 psi | 86% | 3281 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 56,405 psi | 88% | 3425 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 57,566 psi | 90% | 3327 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,095 psi | 77% | 3261 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 82% | 54,897 psi | 86% | 3301 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 56,376 psi | 88% | 3379 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 55,593 psi | 87% | 3330 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 96% | 56,971 psi | 89% | 3366 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,767 psi | 87% | 3343 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,593 psi | 87% | 3301 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,486 psi | 76% | 3373 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 57,043 psi | 89% | 3415 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,651 psi | 57% | 2136 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,434 psi | 87% | 3274 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,376 psi | 87% | 3304 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,419 psi | 87% | 3294 fps | 99.2% |
| IMR 4831 | <<locked>> | 90% | 54,868 psi | 86% | 3314 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,679 psi | 86% | 3287 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 98% | 54,418 psi | 85% | 3396 fps | 97% |
| Lovex S062 | <<locked>> | 82% | 55,956 psi | 88% | 3271 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,854 psi | 88% | 3291 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 57,508 psi | 90% | 3343 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,357 psi | 79% | 3219 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 56,811 psi | 89% | 3333 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,275 psi | 88% | 3360 fps | 98.2% |
| Norma MRP | <<locked>> | 96% | 56,260 psi | 88% | 3455 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 56,666 psi | 89% | 3369 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,114 psi | 86% | 3419 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 90% | 55,492 psi | 87% | 3363 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,388 psi | 84% | 3343 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 59% | 2185 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,679 psi | 86% | 3278 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,999 psi | 88% | 3402 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,360 psi | 85% | 3340 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,768 psi | 89% | 3442 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,139 psi | 77% | 3373 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 57,725 psi | 90% | 3284 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,839 psi | 86% | 3278 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,826 psi | 89% | 3337 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 94% | 54,172 psi | 85% | 3340 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 57,566 psi | 90% | 3327 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,854 psi | 88% | 3291 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,956 psi | 88% | 3271 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,508 psi | 90% | 3343 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,637 psi | 89% | 3343 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,230 psi | 87% | 3150 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,419 psi | 87% | 3235 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,508 psi | 90% | 3402 fps | 98.7% |
| Somchem S355 | <<locked>> | 84% | 54,737 psi | 86% | 3274 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,114 psi | 86% | 3261 fps | 96.4% |
| Somchem S365 | <<locked>> | 92% | 56,666 psi | 89% | 3369 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,926 psi | 86% | 3314 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 86% | 56,043 psi | 88% | 3245 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,998 psi | 86% | 3297 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,389 psi | 85% | 3284 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 56,739 psi | 89% | 3245 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,201 psi | 85% | 3301 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,043 psi | 88% | 3379 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,260 psi | 88% | 3442 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,141 psi | 82% | 3337 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,592 psi | 86% | 3255 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,623 psi | 89% | 3386 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,143 psi | 85% | 3488 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,911 psi | 86% | 3304 fps | 98.1% |
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 2700 | <<locked>> | 80% | 53,287 psi | 84% | 3212 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 35,056 psi | 55% | 2877 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 53,156 psi | 83% | 3209 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,234 psi | 65% | 3064 fps | 98.8% |
| Accurate High Country | 75.2 gr | 90% | 47,007 psi | 74% | 3274 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 94% | 51,387 psi | 81% | 3343 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 49,617 psi | 78% | 3179 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 45,295 psi | 71% | 3169 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 94% | 49,661 psi | 78% | 3287 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,685 psi | 67% | 3100 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,685 psi | 67% | 3100 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,430 psi | 79% | 3209 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,867 psi | 84% | 3287 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,595 psi | 62% | 3071 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,527 psi | 71% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,235 psi | 66% | 3094 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 43,033 psi | 67% | 3153 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,312 psi | 46% | 2782 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,388 psi | 52% | 2923 fps | 95.3% |
| Alliant Reloder-26 | 68.9 gr | 80% | 31,720 psi | 50% | 2913 fps | 95.4% |
| Bofors RP15 | <<locked>> | 92% | 42,438 psi | 67% | 3136 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 51,271 psi | 80% | 3225 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 43,033 psi | 67% | 3153 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 44,614 psi | 70% | 3077 fps | 96.8% |
| Hodgdon H1000 | <<locked>> | 98% | 45,614 psi | 71% | 3186 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 51,459 psi | 81% | 3238 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 42,946 psi | 67% | 3110 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 45,774 psi | 72% | 3136 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 92% | 49,763 psi | 78% | 3232 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,112 psi | 82% | 3278 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,260 psi | 58% | 2946 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,453 psi | 67% | 3225 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 42,148 psi | 66% | 3120 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 43% | 1913 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,141 psi | 82% | 3219 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,132 psi | 63% | 2989 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,977 psi | 72% | 3110 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 39,291 psi | 62% | 2999 fps | 98.4% |
| IMR 4955 Enduron | <<locked>> | 92% | 51,300 psi | 80% | 3225 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 47,485 psi | 74% | 3255 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 52,460 psi | 82% | 3212 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,569 psi | 68% | 3051 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 41,843 psi | 66% | 3031 fps | 96.9% |
| Lovex S071 | <<locked>> | 88% | 33,997 psi | 53% | 2851 fps | 95% |
| Norma 203B | <<locked>> | 80% | 53,243 psi | 83% | 3271 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,876 psi | 72% | 3156 fps | 95.9% |
| Norma MRP | 71.9 gr | 86% | 39,349 psi | 62% | 3097 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 40,683 psi | 64% | 3054 fps | 98.6% |
| Ramshot Grand | <<locked>> | 94% | 47,601 psi | 75% | 3268 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 39,610 psi | 62% | 3035 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 92% | 39,595 psi | 62% | 3048 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 44% | 1959 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,111 psi | 80% | 3215 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,298 psi | 76% | 3271 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,031 psi | 64% | 3077 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,508 psi | 62% | 3084 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 39,436 psi | 62% | 3130 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 54,317 psi | 85% | 3228 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,225 psi | 76% | 3163 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,833 psi | 73% | 3143 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 88% | 44,193 psi | 69% | 3140 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 44,614 psi | 70% | 3077 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,569 psi | 68% | 3051 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 52,460 psi | 82% | 3212 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,843 psi | 66% | 3031 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,559 psi | 78% | 3222 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,820 psi | 77% | 3048 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,641 psi | 67% | 2986 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,801 psi | 69% | 3133 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 48,240 psi | 76% | 3159 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,517 psi | 81% | 3196 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 37,246 psi | 58% | 2999 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 39,334 psi | 62% | 2989 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 46,180 psi | 72% | 3077 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,105 psi | 66% | 3051 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 41,582 psi | 65% | 3031 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 53,287 psi | 84% | 3189 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,626 psi | 65% | 3051 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 32,634 psi | 51% | 2871 fps | 96.8% |
| Vihtavuori N560 | <<locked>> | 92% | 48,921 psi | 77% | 3297 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 98% | 48,501 psi | 76% | 3264 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,191 psi | 65% | 3009 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 43,091 psi | 68% | 3114 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,049 psi | 41% | 2749 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,425 psi | 70% | 3100 fps | 95.7% |
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 85 powders for 7 x 66 SE v. Hofe loaded with the .284 | 120gr | Prvi Partizan HP. Winchester StaBALL HD delivers the highest muzzle velocity at 3,488 fps; across all powders the maximum-charge window runs from 2,136 fps to 3,488 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 85 of the 85 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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, Norma MRP rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 120gr | Prvi Partizan HP 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.