Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 130gr | CutEdge ESP Raptor bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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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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% | 56,942 psi | 89% | 3169 fps | 99.3% |
| Accurate 3100 | <<locked>> | 98% | 56,565 psi | 89% | 3222 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 56,159 psi | 88% | 3143 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,404 psi | 85% | 3215 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,521 psi | 87% | 3323 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 56,463 psi | 88% | 3189 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,535 psi | 87% | 3271 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 57,319 psi | 90% | 3333 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,247 psi | 62% | 3005 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,724 psi | 87% | 3264 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,377 psi | 90% | 3212 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,435 psi | 90% | 3235 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,448 psi | 87% | 3281 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,869 psi | 89% | 3301 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,013 psi | 86% | 3255 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,797 psi | 89% | 3327 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 3297 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,734 psi | 78% | 3232 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,085 psi | 85% | 3330 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,405 psi | 87% | 3301 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 54,607 psi | 86% | 3169 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,513 psi | 71% | 3140 fps | 96.2% |
| Bofors RP5 | <<locked>> | 98% | 56,797 psi | 89% | 3327 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 57,537 psi | 90% | 3222 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,182 psi | 77% | 3173 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 54,897 psi | 86% | 3189 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,666 psi | 89% | 3278 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 55,985 psi | 88% | 3232 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 57,319 psi | 90% | 3268 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,057 psi | 88% | 3245 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,869 psi | 88% | 3196 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,617 psi | 76% | 3281 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 88% | 57,392 psi | 90% | 3317 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,492 psi | 57% | 2044 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,782 psi | 87% | 3169 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,622 psi | 87% | 3202 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,637 psi | 87% | 3192 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 54,955 psi | 86% | 3205 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,665 psi | 86% | 3186 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 98% | 54,781 psi | 86% | 3301 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 55,941 psi | 88% | 3156 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,941 psi | 88% | 3186 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 57,609 psi | 90% | 3235 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,285 psi | 79% | 3117 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 56,739 psi | 89% | 3219 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,521 psi | 89% | 3261 fps | 98.7% |
| Norma MRP | <<locked>> | 96% | 56,521 psi | 89% | 3350 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 56,840 psi | 89% | 3258 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,434 psi | 87% | 3320 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 55,709 psi | 87% | 3261 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3248 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 59% | 2093 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,824 psi | 86% | 3173 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,347 psi | 88% | 3291 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,433 psi | 85% | 3238 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,043 psi | 89% | 3337 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,110 psi | 77% | 3278 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 82% | 57,609 psi | 90% | 3169 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,955 psi | 86% | 3169 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,043 psi | 89% | 3238 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 54,404 psi | 85% | 3241 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 57,537 psi | 90% | 3222 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,941 psi | 88% | 3186 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,941 psi | 88% | 3156 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,609 psi | 90% | 3235 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,724 psi | 89% | 3235 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,317 psi | 87% | 3038 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,376 psi | 87% | 3133 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,653 psi | 90% | 3297 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 54,810 psi | 86% | 3163 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,056 psi | 86% | 3163 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 56,840 psi | 89% | 3258 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,853 psi | 86% | 3212 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 56,115 psi | 88% | 3133 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,114 psi | 86% | 3192 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,375 psi | 85% | 3182 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 56,782 psi | 89% | 3133 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,346 psi | 85% | 3199 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,898 psi | 88% | 3268 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,492 psi | 89% | 3340 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 3238 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,926 psi | 86% | 3150 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,666 psi | 89% | 3278 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3379 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,172 psi | 86% | 3205 fps | 98.6% |
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% | 53,301 psi | 84% | 3110 fps | 98.9% |
| Accurate 3100 | <<locked>> | 82% | 32,155 psi | 50% | 2713 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 52,692 psi | 83% | 3091 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,988 psi | 64% | 2959 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 94% | 51,459 psi | 81% | 3248 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 49,777 psi | 78% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,438 psi | 67% | 3009 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 92% | 46,528 psi | 73% | 3123 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 98% | 36,796 psi | 58% | 2936 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,627 psi | 67% | 3005 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,560 psi | 79% | 3100 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,940 psi | 85% | 3179 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,682 psi | 62% | 2972 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,629 psi | 72% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,177 psi | 66% | 2999 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,001 psi | 63% | 2986 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,993 psi | 45% | 2690 fps | 97.4% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,082 psi | 49% | 2766 fps | 95% |
| Alliant Reloder-26 | 66.7 gr | 80% | 31,372 psi | 49% | 2818 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 42,337 psi | 66% | 3041 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 50,937 psi | 80% | 3110 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,322 psi | 66% | 3068 fps | 95.2% |
| Bofors RP5 | <<locked>> | 88% | 40,001 psi | 63% | 2986 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 44,440 psi | 70% | 2976 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 96% | 42,583 psi | 67% | 3025 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 51,285 psi | 80% | 3127 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,004 psi | 67% | 3012 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,716 psi | 72% | 3035 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 49,734 psi | 78% | 3130 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,863 psi | 77% | 3114 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,086 psi | 58% | 2848 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,595 psi | 62% | 3058 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 42,221 psi | 66% | 3025 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 43% | 1831 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,373 psi | 82% | 3114 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,059 psi | 63% | 2894 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,948 psi | 72% | 3009 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 39,276 psi | 62% | 2904 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,254 psi | 76% | 3064 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 44,411 psi | 70% | 3091 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 52,518 psi | 82% | 3104 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,323 psi | 68% | 2949 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 41,626 psi | 65% | 2930 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 33,678 psi | 53% | 2756 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 53,301 psi | 84% | 3163 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,772 psi | 67% | 2992 fps | 95.7% |
| Norma MRP | 68 gr | 84% | 36,448 psi | 57% | 2927 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,582 psi | 64% | 2953 fps | 99% |
| Ramshot Grand | <<locked>> | 92% | 44,338 psi | 69% | 3100 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 39,494 psi | 62% | 2936 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 39,320 psi | 62% | 2956 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 44% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,329 psi | 80% | 3114 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,501 psi | 76% | 3166 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,886 psi | 64% | 2976 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,523 psi | 62% | 2989 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,477 psi | 57% | 2963 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 54,070 psi | 85% | 3114 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,993 psi | 75% | 3051 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,888 psi | 69% | 2982 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 41,292 psi | 65% | 2976 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,440 psi | 70% | 2976 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,323 psi | 68% | 2949 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 52,518 psi | 82% | 3104 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,626 psi | 65% | 2930 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,545 psi | 78% | 3114 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,849 psi | 77% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,453 psi | 67% | 2890 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,930 psi | 64% | 2972 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,051 psi | 75% | 3048 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,037 psi | 75% | 3035 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 37,144 psi | 58% | 2900 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 39,175 psi | 61% | 2894 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 46,064 psi | 72% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,076 psi | 66% | 2949 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 38,754 psi | 61% | 2874 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 53,171 psi | 83% | 3077 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,394 psi | 65% | 2949 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 32,416 psi | 51% | 2776 fps | 97.5% |
| Vihtavuori N560 | 74.5 gr | 92% | 49,052 psi | 77% | 3202 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 96% | 45,136 psi | 71% | 3097 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,234 psi | 65% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,207 psi | 68% | 3018 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,599 psi | 40% | 2657 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,321 psi | 65% | 2940 fps | 95.5% |
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 85 powders for 7 x 66 SE v. Hofe loaded with the .284 | 130gr | CutEdge ESP Raptor. Winchester StaBALL HD delivers the highest muzzle velocity at 3,379 fps; across all powders the maximum-charge window runs from 2,044 fps to 3,379 fps. ADI AR 2225 gives the best case fill at 100 %, and 85 of the 85 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 130.0 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-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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 130gr | CutEdge ESP Raptor 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.