Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 110gr | Speer TNT bullet and 86 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.
A valid access license is required to use the Personalized Load Calculator.
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% | 57,348 psi | 90% | 3346 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,650 psi | 86% | 3350 fps | 98% |
| Accurate 3100 | <<locked>> | 98% | 54,085 psi | 85% | 3396 fps | 99.2% |
| Accurate 4064 | <<locked>> | 82% | 54,244 psi | 85% | 3350 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,637 psi | 87% | 3465 fps | 99.9% |
| Accurate High Country | <<locked>> | 96% | 55,158 psi | 86% | 3553 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 86% | 57,464 psi | 90% | 3442 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,594 psi | 89% | 3507 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 98% | 54,302 psi | 85% | 3491 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,508 psi | 90% | 3583 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,114 psi | 86% | 3412 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,042 psi | 86% | 3432 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,101 psi | 88% | 3530 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,740 psi | 90% | 3556 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,927 psi | 88% | 3491 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,624 psi | 90% | 3560 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,273 psi | 85% | 3481 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,268 psi | 74% | 3389 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,868 psi | 86% | 3573 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3461 fps | 97% |
| Bofors RP3 | <<locked>> | 84% | 56,028 psi | 88% | 3428 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,624 psi | 90% | 3560 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 55,332 psi | 87% | 3406 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 84% | 56,434 psi | 88% | 3448 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 57,725 psi | 90% | 3520 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 56,942 psi | 89% | 3471 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,087 psi | 89% | 3474 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,565 psi | 89% | 3442 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,624 psi | 90% | 3484 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 54,331 psi | 85% | 3484 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 57% | 2224 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,014 psi | 89% | 3425 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,970 psi | 88% | 3399 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 56,666 psi | 89% | 3438 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,985 psi | 89% | 3438 fps | 98.9% |
| IMR 4831 | <<locked>> | 92% | 55,985 psi | 88% | 3451 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,492 psi | 89% | 3465 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,869 psi | 88% | 3419 fps | 95.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3527 fps | 96.4% |
| Lovex S062 | <<locked>> | 84% | 57,217 psi | 90% | 3415 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,290 psi | 90% | 3435 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 55,288 psi | 87% | 3419 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,921 psi | 75% | 3281 fps | 98.3% |
| Norma 203B | <<locked>> | 82% | 54,346 psi | 85% | 3415 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,696 psi | 90% | 3497 fps | 97.8% |
| Norma MRP | <<locked>> | 98% | 57,334 psi | 90% | 3589 fps | 99.1% |
| Norma URP | <<locked>> | 90% | 54,186 psi | 85% | 3445 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 55,463 psi | 87% | 3442 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,304 psi | 88% | 3547 fps | 97% |
| Ramshot Hunter | <<locked>> | 92% | 56,753 psi | 89% | 3501 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,575 psi | 79% | 3396 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,159 psi | 58% | 2277 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,144 psi | 88% | 3422 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,043 psi | 89% | 3547 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,695 psi | 87% | 3484 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,940 psi | 85% | 3510 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,659 psi | 73% | 3415 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 82% | 55,521 psi | 87% | 3373 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,072 psi | 88% | 3422 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,433 psi | 85% | 3406 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 96% | 55,187 psi | 86% | 3474 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 88% | 55,332 psi | 87% | 3406 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,290 psi | 90% | 3435 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 57,217 psi | 90% | 3415 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,288 psi | 87% | 3419 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,172 psi | 85% | 3425 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,695 psi | 89% | 3294 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,956 psi | 89% | 3376 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,723 psi | 86% | 3468 fps | 97.6% |
| Somchem S355 | <<locked>> | 86% | 56,043 psi | 88% | 3419 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,536 psi | 89% | 3392 fps | 95.8% |
| Somchem S365 | <<locked>> | 94% | 57,609 psi | 90% | 3507 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,043 psi | 88% | 3448 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 82% | 55,970 psi | 88% | 3330 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,246 psi | 88% | 3343 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,334 psi | 90% | 3386 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,246 psi | 88% | 3442 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,506 psi | 87% | 3415 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 82% | 54,621 psi | 86% | 3333 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,332 psi | 87% | 3442 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 56,768 psi | 89% | 3510 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,348 psi | 90% | 3573 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,057 psi | 88% | 3396 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,725 psi | 90% | 3520 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,227 psi | 79% | 3547 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,362 psi | 88% | 3438 fps | 97.7% |
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% | 53,664 psi | 84% | 3291 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,082 psi | 80% | 3281 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 38,029 psi | 60% | 3058 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 50,850 psi | 80% | 3294 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,059 psi | 61% | 3120 fps | 97.6% |
| Accurate High Country | 79.8 gr | 94% | 51,329 psi | 80% | 3474 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 47,674 psi | 75% | 3258 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 46,354 psi | 73% | 3297 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 50,778 psi | 80% | 3415 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,519 psi | 84% | 3514 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,472 psi | 76% | 3287 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,619 psi | 81% | 3369 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,739 psi | 59% | 3130 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,236 psi | 68% | 3281 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 46,035 psi | 72% | 3287 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 46,673 psi | 73% | 3343 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 29,718 psi | 47% | 2890 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 92% | 36,260 psi | 57% | 3104 fps | 95.6% |
| Alliant Reloder-26 | 73.5 gr | 84% | 34,737 psi | 54% | 3104 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 46,021 psi | 72% | 3327 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,936 psi | 77% | 3301 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 46,673 psi | 73% | 3343 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,786 psi | 67% | 3140 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 49,182 psi | 77% | 3310 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 40,944 psi | 64% | 3169 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 46,847 psi | 73% | 3271 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,345 psi | 84% | 3406 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,331 psi | 55% | 3002 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,795 psi | 84% | 3422 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 43,308 psi | 68% | 3255 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1995 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,154 psi | 79% | 3301 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,533 psi | 82% | 3337 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 43,787 psi | 69% | 3179 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,150 psi | 69% | 3179 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 37,463 psi | 59% | 3061 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 52,953 psi | 83% | 3402 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,460 psi | 82% | 3353 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 51,866 psi | 81% | 3451 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 50,372 psi | 79% | 3297 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,771 psi | 65% | 3120 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 40,001 psi | 63% | 3091 fps | 95.4% |
| Lovex S071 | <<locked>> | 92% | 36,753 psi | 58% | 3025 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,024 psi | 80% | 3353 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,949 psi | 74% | 3287 fps | 95.3% |
| Norma MRP | 76.4 gr | 90% | 42,888 psi | 67% | 3291 fps | 96% |
| Norma URP | <<locked>> | 80% | 38,696 psi | 61% | 3114 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 51,822 psi | 81% | 3379 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,228 psi | 82% | 3468 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 37,565 psi | 59% | 3087 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 96% | 43,526 psi | 68% | 3245 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 43% | 2044 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,139 psi | 77% | 3287 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,905 psi | 72% | 3350 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,914 psi | 61% | 3133 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,768 psi | 59% | 3140 fps | 96.6% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 40,277 psi | 63% | 3245 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,301 psi | 82% | 3317 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,006 psi | 72% | 3235 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 51,010 psi | 80% | 3340 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 45,078 psi | 71% | 3264 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,786 psi | 67% | 3140 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,771 psi | 65% | 3120 fps | 97.1% |
| Shooters World Precision | <<locked>> | 80% | 50,372 psi | 79% | 3297 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,001 psi | 63% | 3091 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,239 psi | 74% | 3294 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,021 psi | 74% | 3136 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,002 psi | 64% | 3054 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,672 psi | 70% | 3261 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 46,195 psi | 72% | 3235 fps | 99.8% |
| Somchem S361 | <<locked>> | 92% | 52,910 psi | 83% | 3327 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 35,244 psi | 55% | 3061 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 42,844 psi | 67% | 3179 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 52,605 psi | 82% | 3278 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,765 psi | 83% | 3287 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,193 psi | 69% | 3150 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,103 psi | 63% | 3114 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 45,223 psi | 71% | 3215 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 51,126 psi | 80% | 3274 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,610 psi | 62% | 3110 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,748 psi | 48% | 2917 fps | 95% |
| Vihtavuori N560 | <<locked>> | 96% | 53,432 psi | 84% | 3497 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,465 psi | 62% | 3074 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 41,133 psi | 64% | 3176 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,268 psi | 44% | 2927 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,469 psi | 71% | 3225 fps | 95.1% |
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 95 powders for 7 x 66 SE v. Hofe loaded with the .284 | 110gr | Speer TNT. Norma MRP delivers the highest muzzle velocity at 3,589 fps; across all powders the maximum-charge window runs from 2,224 fps to 3,589 fps. ADI AR 2217 gives the best case fill at 100 %, and 95 of the 95 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 110.0 gr projectile in 0.284" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-22 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 | 110gr | Speer TNT 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.