Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 130gr | Sierra HPBT MatchKing bullet and 78 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 ADI AR 2213.
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% | 55,434 psi | 87% | 3202 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 56,840 psi | 89% | 3251 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,753 psi | 89% | 3363 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 94% | 53,708 psi | 84% | 3287 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 82% | 54,578 psi | 86% | 3159 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,638 psi | 90% | 3304 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 55,376 psi | 87% | 3301 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,118 psi | 64% | 3051 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,099 psi | 85% | 3235 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,724 psi | 87% | 3182 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,450 psi | 90% | 3310 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,795 psi | 86% | 3268 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,058 psi | 89% | 3287 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,158 psi | 86% | 3297 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,941 psi | 88% | 3271 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,895 psi | 81% | 3271 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,652 psi | 89% | 3369 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3337 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 56,681 psi | 89% | 3199 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,776 psi | 75% | 3186 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 55,158 psi | 86% | 3297 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 55,724 psi | 87% | 3189 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,126 psi | 80% | 3209 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 82% | 56,753 psi | 89% | 3219 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,926 psi | 86% | 3245 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 57,551 psi | 90% | 3258 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 55,434 psi | 87% | 3235 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,259 psi | 85% | 3215 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,682 psi | 90% | 3222 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,705 psi | 79% | 3323 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 55,201 psi | 87% | 3278 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,840 psi | 58% | 2054 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,493 psi | 90% | 3196 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,392 psi | 90% | 3232 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,334 psi | 90% | 3219 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 57,116 psi | 90% | 3238 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,565 psi | 89% | 3222 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 56,869 psi | 89% | 3340 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 54,331 psi | 85% | 3156 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 55,883 psi | 88% | 3209 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3156 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 54,578 psi | 86% | 3225 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 54,868 psi | 86% | 3320 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 55,071 psi | 86% | 3232 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,624 psi | 90% | 3360 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 57,624 psi | 90% | 3291 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,101 psi | 88% | 3287 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,579 psi | 59% | 2100 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,492 psi | 89% | 3202 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,302 psi | 85% | 3258 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,826 psi | 89% | 3274 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,100 psi | 86% | 3301 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,445 psi | 81% | 3323 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 57,000 psi | 89% | 3199 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,259 psi | 87% | 3209 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 56,434 psi | 88% | 3274 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 55,724 psi | 87% | 3189 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,331 psi | 85% | 3156 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 55,883 psi | 88% | 3209 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,752 psi | 86% | 3202 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,956 psi | 89% | 3061 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,276 psi | 90% | 3163 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,985 psi | 88% | 3271 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 56,681 psi | 89% | 3192 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,000 psi | 89% | 3196 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 55,361 psi | 87% | 3235 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,101 psi | 89% | 3248 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 54,418 psi | 85% | 3107 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,101 psi | 89% | 3222 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,536 psi | 89% | 3219 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 56,347 psi | 88% | 3228 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,665 psi | 86% | 3245 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,824 psi | 86% | 3310 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3281 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,724 psi | 89% | 3176 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,926 psi | 86% | 3245 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,508 psi | 90% | 3419 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,305 psi | 90% | 3241 fps | 99% |
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% | 31,952 psi | 50% | 2703 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 43,076 psi | 68% | 3002 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 45,948 psi | 72% | 3153 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 92% | 50,169 psi | 79% | 3222 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 51,155 psi | 80% | 3100 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,278 psi | 65% | 2979 fps | 95.5% |
| ADI AR 2213 | 71.5 gr | 90% | 45,049 psi | 71% | 3094 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 36,172 psi | 57% | 2920 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 41,495 psi | 65% | 2976 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,388 psi | 82% | 3127 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,176 psi | 65% | 3005 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,688 psi | 75% | 3146 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,089 psi | 64% | 2969 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,102 psi | 61% | 2963 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,618 psi | 48% | 2736 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,619 psi | 51% | 2815 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,315 psi | 52% | 2871 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 41,524 psi | 65% | 3018 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 53,229 psi | 83% | 3143 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,727 psi | 65% | 3051 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 39,102 psi | 61% | 2963 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 46,108 psi | 72% | 3009 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 94% | 41,466 psi | 65% | 2999 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 53,127 psi | 83% | 3159 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,715 psi | 70% | 3048 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 47,485 psi | 74% | 3071 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 48,312 psi | 76% | 3104 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,297 psi | 74% | 3084 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,827 psi | 61% | 2881 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,812 psi | 61% | 3035 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 44,106 psi | 69% | 3068 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 43% | 1837 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,809 psi | 84% | 3136 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,597 psi | 65% | 2927 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,456 psi | 74% | 3038 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 41,104 psi | 64% | 2943 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,789 psi | 73% | 3035 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 46,180 psi | 72% | 3130 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,078 psi | 71% | 2982 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 43,395 psi | 68% | 2969 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 33,417 psi | 52% | 2743 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 41,423 psi | 65% | 2959 fps | 95.4% |
| Norma MRP | 67.2 gr | 82% | 35,650 psi | 56% | 2904 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 42,380 psi | 66% | 2989 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 43,033 psi | 67% | 3071 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 41,176 psi | 65% | 2976 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 38,537 psi | 60% | 2936 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,108 psi | 44% | 1883 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,968 psi | 83% | 3140 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,604 psi | 79% | 3199 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,960 psi | 67% | 3018 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,307 psi | 65% | 3031 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,708 psi | 56% | 2940 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 50,038 psi | 78% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,455 psi | 71% | 3018 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 40,335 psi | 63% | 2953 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 46,108 psi | 72% | 3009 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,078 psi | 71% | 2982 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 43,395 psi | 68% | 2969 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,256 psi | 80% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,459 psi | 79% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,106 psi | 69% | 2923 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,972 psi | 63% | 2946 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 49,908 psi | 78% | 3081 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,688 psi | 73% | 3005 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 39,044 psi | 61% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,276 psi | 60% | 2871 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 47,805 psi | 75% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,816 psi | 69% | 2986 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 37,927 psi | 59% | 2851 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,134 psi | 68% | 2982 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 34,229 psi | 54% | 2822 fps | 98.2% |
| Vihtavuori N560 | 73.8 gr | 90% | 47,616 psi | 75% | 3169 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 44,295 psi | 69% | 3081 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,989 psi | 67% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,933 psi | 70% | 3054 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,166 psi | 43% | 2723 fps | 97.8% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,248 psi | 63% | 2913 fps | 95.2% |
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 78 powders for 7 x 66 SE v. Hofe loaded with the .284 | 130gr | Sierra HPBT MatchKing. Winchester StaBALL HD delivers the highest muzzle velocity at 3,419 fps; across all powders the maximum-charge window runs from 2,054 fps to 3,419 fps. ADI AR 2225 gives the best case fill at 100 %, and 78 of the 78 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 130.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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, ADI AR 2213 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 130gr | Sierra HPBT MatchKing 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.