Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 120gr | Barnes TTSX BT bullet and 90 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 2495 | <<locked>> | 82% | 56,289 psi | 88% | 3205 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,143 psi | 85% | 3225 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3337 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 56,869 psi | 89% | 3268 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,781 psi | 86% | 3330 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,578 psi | 86% | 3428 fps | 97.1% |
| Accurate MAGPRO | <<locked>> | 98% | 55,709 psi | 87% | 3428 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 57,203 psi | 90% | 3314 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,275 psi | 88% | 3386 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 53,766 psi | 84% | 3369 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,101 psi | 89% | 3451 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,621 psi | 86% | 3281 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,723 psi | 86% | 3304 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,796 psi | 87% | 3402 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,377 psi | 90% | 3425 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,622 psi | 87% | 3366 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,869 psi | 89% | 3435 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,780 psi | 84% | 3353 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,398 psi | 73% | 3264 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,215 psi | 85% | 3445 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,967 psi | 81% | 3340 fps | 97.5% |
| Bofors RP3 | <<locked>> | 84% | 55,274 psi | 87% | 3294 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,869 psi | 89% | 3435 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 54,853 psi | 86% | 3278 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 55,637 psi | 87% | 3310 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 57,130 psi | 90% | 3392 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 56,652 psi | 89% | 3350 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 54,085 psi | 85% | 3310 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,536 psi | 89% | 3356 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,057 psi | 88% | 3310 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,232 psi | 90% | 3356 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,484 psi | 71% | 3301 fps | 96.8% |
| Hodgdon Superformance | <<locked>> | 88% | 53,853 psi | 84% | 3363 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 57% | 2119 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,667 psi | 90% | 3320 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,536 psi | 89% | 3294 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,608 psi | 87% | 3271 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 56,275 psi | 88% | 3317 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,507 psi | 89% | 3310 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 55,390 psi | 87% | 3323 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,144 psi | 88% | 3337 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,564 psi | 87% | 3301 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,042 psi | 86% | 3406 fps | 97% |
| Lovex S062 | <<locked>> | 84% | 56,594 psi | 89% | 3281 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,695 psi | 89% | 3307 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 54,491 psi | 85% | 3291 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,876 psi | 73% | 3156 fps | 98.6% |
| Norma 203B | <<locked>> | 84% | 57,566 psi | 90% | 3346 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,319 psi | 90% | 3376 fps | 98.2% |
| Norma MRP | <<locked>> | 98% | 56,681 psi | 89% | 3461 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 57,334 psi | 90% | 3379 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,926 psi | 86% | 3310 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,854 psi | 88% | 3428 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 56,289 psi | 88% | 3376 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,922 psi | 78% | 3278 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,941 psi | 58% | 2169 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,825 psi | 87% | 3297 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,826 psi | 89% | 3419 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,824 psi | 86% | 3353 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,508 psi | 90% | 3455 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,818 psi | 72% | 3294 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 55,042 psi | 86% | 3241 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,608 psi | 87% | 3291 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,725 psi | 90% | 3350 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 96% | 54,737 psi | 86% | 3350 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 54,853 psi | 86% | 3278 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,695 psi | 89% | 3307 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 56,594 psi | 89% | 3281 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,491 psi | 85% | 3291 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,566 psi | 90% | 3360 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,217 psi | 88% | 3163 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,275 psi | 88% | 3251 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,273 psi | 85% | 3343 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 55,332 psi | 87% | 3287 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,999 psi | 88% | 3274 fps | 96.3% |
| Somchem S365 | <<locked>> | 94% | 57,014 psi | 89% | 3376 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,419 psi | 87% | 3323 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 55,477 psi | 87% | 3196 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,912 psi | 88% | 3212 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,927 psi | 89% | 3258 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,666 psi | 87% | 3310 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,955 psi | 86% | 3294 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 84% | 57,653 psi | 90% | 3258 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,766 psi | 86% | 3314 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,956 psi | 88% | 3379 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,797 psi | 89% | 3451 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,550 psi | 87% | 3268 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,377 psi | 90% | 3396 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,690 psi | 78% | 3419 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,840 psi | 88% | 3317 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 2495 | <<locked>> | 80% | 52,678 psi | 83% | 3153 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,647 psi | 79% | 3163 fps | 97.8% |
| Accurate 3100 | <<locked>> | 86% | 34,635 psi | 54% | 2874 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 49,980 psi | 78% | 3159 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,247 psi | 60% | 2995 fps | 98% |
| Accurate High Country | 74.7 gr | 92% | 47,282 psi | 74% | 3284 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 96% | 51,822 psi | 81% | 3353 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 47,326 psi | 74% | 3136 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 45,759 psi | 72% | 3176 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 96% | 50,314 psi | 79% | 3297 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,142 psi | 83% | 3383 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,863 psi | 75% | 3159 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,155 psi | 80% | 3241 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,318 psi | 58% | 3012 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,815 psi | 67% | 3159 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,469 psi | 71% | 3166 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,975 psi | 67% | 3156 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,209 psi | 43% | 2713 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,228 psi | 52% | 2917 fps | 95% |
| Alliant Reloder-26 | 68.6 gr | 82% | 31,546 psi | 49% | 2910 fps | 95.1% |
| Bofors RP15 | <<locked>> | 96% | 45,266 psi | 71% | 3205 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 48,283 psi | 76% | 3173 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,975 psi | 67% | 3156 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 42,322 psi | 66% | 3025 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 48,733 psi | 76% | 3186 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 40,393 psi | 63% | 3051 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 43,366 psi | 68% | 3084 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 94% | 50,357 psi | 79% | 3241 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,895 psi | 83% | 3287 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,824 psi | 55% | 2890 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,447 psi | 84% | 3294 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,438 psi | 67% | 3222 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 39,639 psi | 62% | 3061 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,122 psi | 43% | 1903 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,911 psi | 84% | 3258 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,777 psi | 78% | 3176 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,040 psi | 82% | 3205 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 40,524 psi | 64% | 2999 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,874 psi | 69% | 3061 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 36,796 psi | 58% | 2943 fps | 97.7% |
| IMR 4895 | <<locked>> | 80% | 52,475 psi | 82% | 3271 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 51,982 psi | 81% | 3235 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 96% | 47,935 psi | 75% | 3264 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 49,879 psi | 78% | 3169 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,220 psi | 65% | 2999 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 39,320 psi | 62% | 2972 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 35,911 psi | 56% | 2907 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 50,473 psi | 79% | 3222 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,485 psi | 73% | 3169 fps | 95.9% |
| Norma MRP | 71.4 gr | 88% | 39,320 psi | 62% | 3097 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 38,072 psi | 60% | 2992 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 51,314 psi | 80% | 3248 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 48,109 psi | 75% | 3278 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 37,014 psi | 58% | 2972 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 42,757 psi | 67% | 3127 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,586 psi | 43% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,675 psi | 76% | 3166 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,527 psi | 71% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,290 psi | 60% | 3015 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,188 psi | 58% | 3025 fps | 97.1% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,407 psi | 62% | 3130 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 51,677 psi | 81% | 3186 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,237 psi | 71% | 3107 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,340 psi | 74% | 3153 fps | 95% |
| Rottweil R 905 | <<locked>> | 90% | 44,599 psi | 70% | 3150 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 42,322 psi | 66% | 3025 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,220 psi | 65% | 2999 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 49,879 psi | 78% | 3169 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,320 psi | 62% | 2972 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,731 psi | 73% | 3169 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,499 psi | 73% | 3009 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,205 psi | 63% | 2933 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,193 psi | 69% | 3143 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 45,658 psi | 72% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,199 psi | 82% | 3205 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 34,621 psi | 54% | 2940 fps | 99.5% |
| Somchem S385 | <<locked>> | 86% | 39,334 psi | 62% | 2992 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 51,982 psi | 81% | 3143 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,272 psi | 82% | 3156 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,540 psi | 68% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,537 psi | 62% | 2992 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 41,597 psi | 65% | 3031 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 50,734 psi | 80% | 3150 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,102 psi | 61% | 2995 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 30,023 psi | 47% | 2799 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 94% | 49,313 psi | 77% | 3304 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,812 psi | 61% | 2956 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 40,582 psi | 64% | 3058 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,557 psi | 43% | 2815 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,904 psi | 70% | 3114 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 96 powders for 7 x 66 SE v. Hofe loaded with the .284 | 120gr | Barnes TTSX BT. Norma MRP delivers the highest muzzle velocity at 3,461 fps; across all powders the maximum-charge window runs from 2,119 fps to 3,461 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2217, ADI AR 2225 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 | Barnes TTSX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.