Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 125gr | Lehigh Defense Controlled Chaos bullet and 88 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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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% | 56,289 psi | 88% | 3205 fps | 99% |
| Accurate 3100 | <<locked>> | 98% | 55,927 psi | 88% | 3258 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 56,072 psi | 88% | 3189 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,696 psi | 90% | 3317 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,348 psi | 90% | 3422 fps | 98% |
| Accurate MAGPRO | <<locked>> | 96% | 54,534 psi | 85% | 3350 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 84% | 55,637 psi | 87% | 3225 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,839 psi | 86% | 3301 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 56,347 psi | 88% | 3363 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,914 psi | 61% | 3031 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,071 psi | 86% | 3301 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,071 psi | 86% | 3301 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,898 psi | 89% | 3251 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,956 psi | 89% | 3278 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,621 psi | 86% | 3317 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,825 psi | 87% | 3337 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,360 psi | 85% | 3287 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,840 psi | 88% | 3356 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3333 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,979 psi | 77% | 3261 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,348 psi | 90% | 3435 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3337 fps | 98.3% |
| Bofors RP3 | <<locked>> | 82% | 54,273 psi | 85% | 3212 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,840 psi | 88% | 3356 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 57,087 psi | 89% | 3258 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,254 psi | 76% | 3189 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 82% | 54,505 psi | 85% | 3232 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,840 psi | 88% | 3310 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 55,143 psi | 86% | 3264 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 56,376 psi | 88% | 3297 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,129 psi | 86% | 3274 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,984 psi | 86% | 3235 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,863 psi | 75% | 3307 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 56,362 psi | 88% | 3346 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 57% | 2080 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,027 psi | 86% | 3205 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,522 psi | 90% | 3245 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 54,824 psi | 86% | 3235 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,071 psi | 86% | 3228 fps | 99.2% |
| IMR 4831 | <<locked>> | 90% | 54,244 psi | 85% | 3241 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,609 psi | 90% | 3281 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3396 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 55,550 psi | 87% | 3202 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,521 psi | 87% | 3225 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,942 psi | 89% | 3274 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,777 psi | 78% | 3153 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 56,260 psi | 88% | 3261 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,622 psi | 87% | 3291 fps | 98.2% |
| Norma MRP | <<locked>> | 96% | 55,434 psi | 87% | 3379 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 55,999 psi | 88% | 3297 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,261 psi | 90% | 3287 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,404 psi | 85% | 3346 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 90% | 54,839 psi | 86% | 3291 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,678 psi | 83% | 3278 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,304 psi | 58% | 2129 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,172 psi | 85% | 3209 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,201 psi | 87% | 3330 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,725 psi | 90% | 3340 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,970 psi | 88% | 3366 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 3304 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 57,261 psi | 90% | 3212 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,360 psi | 85% | 3209 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,202 psi | 88% | 3268 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 96% | 57,203 psi | 90% | 3333 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 57,087 psi | 89% | 3258 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,521 psi | 87% | 3225 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,550 psi | 87% | 3202 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,942 psi | 89% | 3274 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,130 psi | 88% | 3278 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,810 psi | 86% | 3081 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,969 psi | 86% | 3173 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,724 psi | 89% | 3330 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 57,667 psi | 90% | 3261 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,404 psi | 85% | 3192 fps | 96.4% |
| Somchem S365 | <<locked>> | 92% | 55,854 psi | 88% | 3297 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,157 psi | 85% | 3245 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 86% | 55,666 psi | 87% | 3176 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,331 psi | 85% | 3228 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3281 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 56,347 psi | 88% | 3176 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,305 psi | 90% | 3294 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,347 psi | 87% | 3307 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,492 psi | 87% | 3369 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,329 psi | 80% | 3268 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,099 psi | 85% | 3186 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,014 psi | 88% | 3314 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,040 psi | 83% | 3415 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,302 psi | 85% | 3238 fps | 98.2% |
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% | 52,692 psi | 83% | 3143 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 34,519 psi | 54% | 2818 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 52,634 psi | 82% | 3136 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,814 psi | 64% | 2999 fps | 98.9% |
| Accurate High Country | <<locked>> | 90% | 46,441 psi | 73% | 3209 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 94% | 50,618 psi | 79% | 3274 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 49,124 psi | 77% | 3110 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,872 psi | 66% | 3035 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 48,965 psi | 77% | 3219 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 98% | 36,521 psi | 57% | 2963 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,221 psi | 66% | 3038 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,221 psi | 66% | 3038 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,951 psi | 78% | 3136 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,490 psi | 84% | 3219 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,160 psi | 61% | 3005 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,063 psi | 71% | 3146 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,800 psi | 66% | 3031 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,351 psi | 66% | 3087 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,008 psi | 45% | 2726 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,083 psi | 52% | 2864 fps | 95.5% |
| Alliant Reloder-26 | 66.4 gr | 80% | 31,314 psi | 49% | 2851 fps | 95.5% |
| Bofors RP15 | <<locked>> | 92% | 41,814 psi | 66% | 3071 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 50,691 psi | 79% | 3153 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,351 psi | 66% | 3087 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 44,208 psi | 69% | 3012 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 98% | 45,165 psi | 71% | 3123 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 50,908 psi | 80% | 3169 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 42,656 psi | 67% | 3048 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 45,310 psi | 71% | 3071 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 92% | 48,994 psi | 77% | 3159 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,430 psi | 81% | 3205 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,811 psi | 58% | 2881 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,916 psi | 66% | 3159 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 41,771 psi | 65% | 3061 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 43% | 1864 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,663 psi | 81% | 3150 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,070 psi | 85% | 3189 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 39,798 psi | 62% | 2927 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,600 psi | 71% | 3045 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 38,914 psi | 61% | 2940 fps | 98.5% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,676 psi | 79% | 3156 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 46,963 psi | 74% | 3189 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 52,170 psi | 82% | 3146 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,178 psi | 68% | 2989 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 41,510 psi | 65% | 2966 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 33,620 psi | 53% | 2795 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 52,852 psi | 83% | 3205 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,395 psi | 66% | 3025 fps | 95.1% |
| Norma MRP | 69.3 gr | 86% | 38,856 psi | 61% | 3035 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,277 psi | 63% | 2989 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,592 psi | 84% | 3228 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 47,021 psi | 74% | 3199 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 39,233 psi | 61% | 2972 fps | 97% |
| Ramshot Magnum | <<locked>> | 92% | 39,088 psi | 61% | 2986 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,876 psi | 44% | 1906 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,705 psi | 79% | 3146 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,834 psi | 75% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,611 psi | 64% | 3015 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,189 psi | 61% | 3025 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,914 psi | 61% | 3068 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 53,780 psi | 84% | 3156 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,776 psi | 75% | 3094 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,427 psi | 73% | 3081 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 86% | 40,973 psi | 64% | 3012 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 44,208 psi | 69% | 3012 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,178 psi | 68% | 2989 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 52,170 psi | 82% | 3146 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,510 psi | 65% | 2966 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,081 psi | 77% | 3153 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,443 psi | 76% | 2982 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,337 psi | 66% | 2927 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,395 psi | 68% | 3071 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 47,776 psi | 75% | 3091 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,937 psi | 80% | 3130 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 36,840 psi | 58% | 2940 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 38,827 psi | 61% | 2927 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 45,774 psi | 72% | 3012 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,771 psi | 65% | 2989 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 41,118 psi | 64% | 2969 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 52,808 psi | 83% | 3120 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,191 psi | 65% | 2986 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,242 psi | 51% | 2812 fps | 97% |
| Vihtavuori N560 | 74.1 gr | 92% | 48,283 psi | 76% | 3228 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 47,819 psi | 75% | 3199 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,944 psi | 64% | 2949 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,656 psi | 67% | 3048 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,744 psi | 40% | 2697 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,063 psi | 69% | 3041 fps | 95.8% |
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 88 powders for 7 x 66 SE v. Hofe loaded with the .284 | 125gr | Lehigh Defense Controlled Chaos. Alliant Reloder-26 delivers the highest muzzle velocity at 3,435 fps; across all powders the maximum-charge window runs from 2,080 fps to 3,435 fps. ADI AR 2225 gives the best case fill at 100 %, and 88 of the 88 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 125.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, 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 | 125gr | Lehigh Defense Controlled Chaos 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.