Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 128gr | IBEX TRD bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Vihtavuori N560.
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% | 56,739 psi | 89% | 3232 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 54,331 psi | 85% | 3219 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,621 psi | 86% | 3314 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 82% | 55,332 psi | 87% | 3179 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,549 psi | 85% | 3258 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 96% | 56,014 psi | 88% | 3320 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,235 psi | 66% | 3084 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,940 psi | 86% | 3258 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,724 psi | 89% | 3205 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,505 psi | 85% | 3274 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,840 psi | 88% | 3294 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,711 psi | 90% | 3307 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,941 psi | 88% | 3320 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,927 psi | 89% | 3297 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,736 psi | 83% | 3294 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,566 psi | 90% | 3399 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,940 psi | 86% | 3301 fps | 98.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,834 psi | 77% | 3215 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 55,941 psi | 88% | 3320 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 56,768 psi | 89% | 3215 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,750 psi | 81% | 3225 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 55,767 psi | 87% | 3271 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 84% | 54,795 psi | 86% | 3219 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 56,057 psi | 88% | 3255 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,926 psi | 86% | 3235 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,172 psi | 86% | 3196 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,605 psi | 81% | 3353 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 56,086 psi | 88% | 3304 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 58% | 2060 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,563 psi | 86% | 3192 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,563 psi | 86% | 3179 fps | 99.3% |
| IMR 4831 | <<locked>> | 88% | 54,505 psi | 85% | 3209 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,087 psi | 89% | 3235 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 98% | 57,537 psi | 90% | 3360 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 55,492 psi | 87% | 3186 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 56,942 psi | 89% | 3232 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,215 psi | 85% | 3189 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 55,419 psi | 87% | 3245 fps | 98.4% |
| Norma MRP | <<locked>> | 94% | 55,709 psi | 87% | 3346 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 56,014 psi | 88% | 3255 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,404 psi | 85% | 3314 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 88% | 54,882 psi | 86% | 3255 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3310 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 59% | 2110 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,508 psi | 90% | 3225 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,984 psi | 86% | 3281 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,740 psi | 90% | 3297 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,709 psi | 87% | 3323 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,315 psi | 82% | 3350 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 82% | 54,679 psi | 86% | 3169 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,086 psi | 88% | 3228 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 94% | 57,392 psi | 90% | 3297 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 56,768 psi | 89% | 3215 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,492 psi | 87% | 3186 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 56,942 psi | 89% | 3232 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,753 psi | 87% | 3228 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,725 psi | 90% | 3084 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,853 psi | 86% | 3130 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,927 psi | 89% | 3294 fps | 98.9% |
| Somchem S355 | <<locked>> | 82% | 54,317 psi | 85% | 3163 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,273 psi | 85% | 3153 fps | 96.7% |
| Somchem S365 | <<locked>> | 90% | 56,115 psi | 88% | 3258 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,665 psi | 86% | 3212 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 84% | 55,550 psi | 87% | 3133 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,302 psi | 85% | 3186 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,334 psi | 90% | 3241 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 57,334 psi | 90% | 3251 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,014 psi | 88% | 3278 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,579 psi | 87% | 3333 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,593 psi | 87% | 3307 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,508 psi | 90% | 3199 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,767 psi | 87% | 3271 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,824 psi | 84% | 3383 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,244 psi | 85% | 3199 fps | 98.4% |
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>> | 80% | 33,750 psi | 53% | 2756 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 44,701 psi | 70% | 3038 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 51,140 psi | 80% | 3248 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 51,895 psi | 81% | 3120 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 42,134 psi | 66% | 3005 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 90% | 46,006 psi | 72% | 3120 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 37,333 psi | 59% | 2953 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 42,583 psi | 67% | 3009 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,388 psi | 84% | 3153 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,148 psi | 66% | 3035 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,530 psi | 76% | 3173 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 42,163 psi | 66% | 2999 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,234 psi | 63% | 2999 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,966 psi | 50% | 2779 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,865 psi | 50% | 2792 fps | 95.3% |
| Alliant Reloder-26 | 66.7 gr | 80% | 34,693 psi | 54% | 2917 fps | 97.4% |
| Bofors RP15 | <<locked>> | 90% | 42,656 psi | 67% | 3051 fps | 95.7% |
| Bofors RP30 | <<locked>> | 96% | 42,830 psi | 67% | 3084 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 40,234 psi | 63% | 2999 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 47,210 psi | 74% | 3035 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 94% | 42,424 psi | 66% | 3025 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 45,847 psi | 72% | 3081 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 48,225 psi | 76% | 3091 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 48,994 psi | 77% | 3123 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,182 psi | 76% | 3107 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,987 psi | 63% | 2913 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 40,030 psi | 63% | 3074 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 45,063 psi | 71% | 3094 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 44% | 1847 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,583 psi | 67% | 2953 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,298 psi | 76% | 3061 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 42,424 psi | 66% | 2979 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,572 psi | 75% | 3058 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 47,152 psi | 74% | 3156 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 46,267 psi | 73% | 3012 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 44,686 psi | 70% | 2999 fps | 98% |
| Lovex S071 | <<locked>> | 84% | 33,054 psi | 52% | 2736 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 42,540 psi | 67% | 2989 fps | 95.5% |
| Norma MRP | 66.4 gr | 82% | 36,999 psi | 58% | 2946 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 43,511 psi | 68% | 3018 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 44,179 psi | 69% | 3100 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 42,322 psi | 66% | 3005 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 39,653 psi | 62% | 2969 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,369 psi | 44% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,983 psi | 85% | 3166 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,285 psi | 80% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,135 psi | 69% | 3051 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,279 psi | 66% | 3061 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,970 psi | 58% | 2979 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 51,416 psi | 81% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 46,485 psi | 73% | 3045 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 41,524 psi | 65% | 2986 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 47,210 psi | 74% | 3035 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,267 psi | 73% | 3012 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 44,686 psi | 70% | 2999 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,286 psi | 82% | 3169 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,300 psi | 80% | 2986 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,382 psi | 71% | 2953 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 41,162 psi | 65% | 2979 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 51,111 psi | 80% | 3107 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,703 psi | 75% | 3031 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 40,321 psi | 63% | 2972 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,202 psi | 58% | 2844 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 48,965 psi | 77% | 3025 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,918 psi | 70% | 3015 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 39,044 psi | 61% | 2881 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 44,411 psi | 70% | 3015 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 35,969 psi | 56% | 2874 fps | 98.5% |
| Vihtavuori N560 | 72.9 gr | 90% | 48,631 psi | 76% | 3199 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 45,542 psi | 71% | 3110 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,859 psi | 69% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,064 psi | 72% | 3084 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,689 psi | 45% | 2782 fps | 98.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,321 psi | 65% | 2943 fps | 95.3% |
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 74 powders for 7 x 66 SE v. Hofe loaded with the .284 | 128gr | IBEX TRD. Alliant Reloder-26 delivers the highest muzzle velocity at 3,399 fps; across all powders the maximum-charge window runs from 2,060 fps to 3,399 fps. ADI AR 2225 gives the best case fill at 100 %, and 74 of the 74 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 128.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP30 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, Alliant Reloder-26, Vihtavuori N560 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 128gr | IBEX TRD 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.