Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 120gr | Sierra Pro-Hunter bullet and 79 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 ADI AR 2213.
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% | 54,737 psi | 86% | 3301 fps | 99.7% |
| Accurate 4350 | <<locked>> | 88% | 56,043 psi | 88% | 3353 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,115 psi | 88% | 3461 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 96% | 57,363 psi | 90% | 3458 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 57,435 psi | 90% | 3323 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,985 psi | 89% | 3406 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 54,926 psi | 86% | 3399 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,712 psi | 64% | 3133 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,172 psi | 86% | 3291 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,695 psi | 89% | 3419 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,273 psi | 85% | 3373 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,608 psi | 89% | 3389 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,650 psi | 86% | 3396 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,506 psi | 87% | 3379 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,242 psi | 80% | 3363 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,217 psi | 88% | 3471 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,246 psi | 90% | 3438 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 56,144 psi | 88% | 3307 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,297 psi | 74% | 3274 fps | 96.1% |
| Bofors RP5 | <<locked>> | 96% | 54,650 psi | 86% | 3396 fps | 98.4% |
| Bofors RP7 | <<locked>> | 86% | 55,347 psi | 87% | 3294 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 3301 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 82% | 56,420 psi | 88% | 3330 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,172 psi | 85% | 3343 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 57,217 psi | 90% | 3366 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 54,839 psi | 86% | 3330 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,638 psi | 90% | 3379 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,101 psi | 89% | 3327 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,183 psi | 79% | 3419 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 86% | 54,824 psi | 86% | 3383 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 2149 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,797 psi | 89% | 3304 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,869 psi | 89% | 3333 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,710 psi | 89% | 3323 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 56,507 psi | 89% | 3343 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,014 psi | 88% | 3320 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 56,275 psi | 88% | 3438 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 57,305 psi | 90% | 3297 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,435 psi | 90% | 3323 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 55,303 psi | 87% | 3310 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,098 psi | 82% | 3251 fps | 99.5% |
| Norma 204 | <<locked>> | 88% | 54,143 psi | 85% | 3323 fps | 98% |
| Norma MRP | <<locked>> | 94% | 54,302 psi | 85% | 3419 fps | 99.3% |
| Norma URP | <<locked>> | 88% | 54,491 psi | 85% | 3333 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,971 psi | 89% | 3455 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 57,261 psi | 90% | 3396 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,376 psi | 87% | 3383 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 59% | 2195 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,043 psi | 88% | 3307 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,696 psi | 90% | 3428 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,202 psi | 88% | 3376 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,418 psi | 85% | 3402 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 3412 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 84% | 56,463 psi | 88% | 3307 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,665 psi | 86% | 3304 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 94% | 55,985 psi | 88% | 3376 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 55,347 psi | 87% | 3294 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,435 psi | 90% | 3323 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 57,305 psi | 90% | 3297 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,303 psi | 87% | 3310 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,360 psi | 85% | 3310 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,550 psi | 89% | 3176 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,913 psi | 89% | 3268 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,521 psi | 87% | 3373 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 56,014 psi | 88% | 3301 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,550 psi | 89% | 3294 fps | 96.9% |
| Somchem S365 | <<locked>> | 90% | 54,737 psi | 86% | 3340 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,594 psi | 89% | 3346 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 57,435 psi | 90% | 3268 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,434 psi | 88% | 3327 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,970 psi | 88% | 3317 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 55,724 psi | 87% | 3330 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,056 psi | 85% | 3346 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,244 psi | 85% | 3409 fps | 96.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,969 psi | 85% | 3376 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,246 psi | 88% | 3278 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,404 psi | 85% | 3346 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3524 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,724 psi | 89% | 3340 fps | 98.5% |
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% | 33,765 psi | 53% | 2848 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 42,598 psi | 67% | 3094 fps | 99.1% |
| Accurate High Country | <<locked>> | 88% | 45,411 psi | 71% | 3241 fps | 95% |
| Accurate MAGPRO | <<locked>> | 94% | 53,229 psi | 83% | 3383 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 50,662 psi | 79% | 3202 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 43,584 psi | 68% | 3133 fps | 95.5% |
| ADI AR 2213 | 76.4 gr | 92% | 47,732 psi | 75% | 3251 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 38,203 psi | 60% | 3064 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,779 psi | 81% | 3235 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,654 psi | 64% | 3100 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,050 psi | 74% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 43,497 psi | 68% | 3127 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,408 psi | 65% | 3117 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,197 psi | 47% | 2815 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 34,403 psi | 54% | 2956 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,851 psi | 51% | 2946 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 43,845 psi | 69% | 3173 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 52,634 psi | 82% | 3248 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,019 psi | 69% | 3199 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 41,408 psi | 65% | 3117 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 45,614 psi | 71% | 3104 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 96% | 44,077 psi | 69% | 3156 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 52,721 psi | 83% | 3264 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 44,324 psi | 69% | 3143 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 46,963 psi | 74% | 3166 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 51,155 psi | 80% | 3261 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 50,082 psi | 78% | 3241 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,363 psi | 60% | 2972 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 41,089 psi | 64% | 3189 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 43,627 psi | 68% | 3156 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 43% | 1926 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,301 psi | 84% | 3241 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,220 psi | 65% | 3018 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,108 psi | 74% | 3140 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 40,524 psi | 64% | 3031 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 49,429 psi | 77% | 3192 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 49,052 psi | 77% | 3294 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 53,838 psi | 84% | 3238 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,570 psi | 70% | 3081 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 42,830 psi | 67% | 3058 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 35,215 psi | 55% | 2884 fps | 95.7% |
| Norma 204 | <<locked>> | 82% | 43,990 psi | 69% | 3120 fps | 95.5% |
| Norma MRP | 72 gr | 84% | 37,797 psi | 59% | 3058 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 41,771 psi | 65% | 3081 fps | 98.9% |
| Ramshot Grand | <<locked>> | 92% | 45,687 psi | 72% | 3228 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,756 psi | 64% | 3064 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 92% | 40,944 psi | 64% | 3087 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 44% | 1972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,504 psi | 82% | 3245 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,922 psi | 78% | 3301 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,424 psi | 66% | 3110 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,741 psi | 64% | 3120 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,087 psi | 60% | 3094 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 49,400 psi | 77% | 3186 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 48,095 psi | 75% | 3176 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 42,612 psi | 67% | 3107 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,614 psi | 71% | 3104 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,570 psi | 70% | 3081 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 53,838 psi | 84% | 3238 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,830 psi | 67% | 3058 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,807 psi | 80% | 3245 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,937 psi | 78% | 3071 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,729 psi | 69% | 3015 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 42,235 psi | 66% | 3100 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 49,400 psi | 77% | 3182 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 49,414 psi | 77% | 3159 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,580 psi | 60% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 40,567 psi | 64% | 3022 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,224 psi | 74% | 3100 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,352 psi | 68% | 3081 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 40,016 psi | 63% | 2995 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 42,801 psi | 67% | 3081 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 33,881 psi | 53% | 2907 fps | 97.4% |
| Vihtavuori N560 | 78.9 gr | 92% | 50,604 psi | 79% | 3333 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 96% | 46,876 psi | 73% | 3232 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,554 psi | 67% | 3038 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,324 psi | 69% | 3143 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,861 psi | 42% | 2785 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,844 psi | 67% | 3071 fps | 95.4% |
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 79 powders for 7 x 66 SE v. Hofe loaded with the .284 | 120gr | Sierra Pro-Hunter. Winchester StaBALL HD delivers the highest muzzle velocity at 3,524 fps; across all powders the maximum-charge window runs from 2,149 fps to 3,524 fps. ADI AR 2225 gives the best case fill at 100 %, and 79 of the 79 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 1:16.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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. Norma MRP, Vihtavuori N560, ADI AR 2213 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 120gr | Sierra Pro-Hunter 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.