Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 130gr | Barnes X BT bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Winchester StaBALL HD and IMR 7828 SSC.
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>> | 94% | 55,303 psi | 87% | 3182 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 56,492 psi | 89% | 3228 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,941 psi | 88% | 3333 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 94% | 56,724 psi | 89% | 3330 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 56,623 psi | 89% | 3176 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,275 psi | 88% | 3264 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 94% | 54,056 psi | 85% | 3261 fps | 97.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,791 psi | 76% | 3140 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,947 psi | 69% | 3107 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,681 psi | 89% | 3264 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,681 psi | 89% | 3264 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,246 psi | 88% | 3278 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,740 psi | 90% | 3297 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,999 psi | 88% | 3258 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,244 psi | 85% | 3268 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,506 psi | 87% | 3251 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,679 psi | 86% | 3304 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,738 psi | 87% | 3340 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,869 psi | 89% | 3307 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 3232 fps | 97.6% |
| Bofors RP5 | <<locked>> | 94% | 54,244 psi | 85% | 3268 fps | 98.7% |
| Bofors RP7 | <<locked>> | 84% | 55,129 psi | 86% | 3163 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 3245 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 86% | 57,566 psi | 90% | 3274 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 56,434 psi | 88% | 3222 fps | 99% |
| Hodgdon H4831 | <<locked>> | 92% | 54,128 psi | 85% | 3196 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,623 psi | 89% | 3241 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,782 psi | 89% | 3192 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,490 psi | 84% | 3366 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 84% | 54,027 psi | 85% | 3245 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,246 psi | 58% | 2051 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,130 psi | 88% | 3196 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,057 psi | 88% | 3182 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 56,405 psi | 88% | 3212 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,376 psi | 87% | 3182 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 96% | 55,564 psi | 87% | 3301 fps | 97.9% |
| Lovex S065 | <<locked>> | 86% | 57,159 psi | 90% | 3189 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,405 psi | 87% | 3182 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 3199 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 57,145 psi | 90% | 3251 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 39,885 psi | 63% | 3035 fps | 96.6% |
| Norma MRP | <<locked>> | 92% | 54,099 psi | 85% | 3294 fps | 99.5% |
| Norma URP | <<locked>> | 86% | 54,491 psi | 85% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,405 psi | 88% | 3323 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 56,666 psi | 89% | 3261 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 54,940 psi | 86% | 3255 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 60% | 2100 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,898 psi | 89% | 3284 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,014 psi | 88% | 3245 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,638 psi | 90% | 3327 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3366 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 56,565 psi | 89% | 3173 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,711 psi | 90% | 3235 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 92% | 55,550 psi | 87% | 3241 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 84% | 55,129 psi | 86% | 3163 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,159 psi | 90% | 3189 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,405 psi | 87% | 3182 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,464 psi | 90% | 3228 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,811 psi | 87% | 3028 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,550 psi | 89% | 3133 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,100 psi | 86% | 3238 fps | 98.8% |
| Somchem S355 | <<locked>> | 82% | 56,057 psi | 88% | 3163 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,956 psi | 88% | 3163 fps | 97.2% |
| Somchem S365 | <<locked>> | 88% | 54,679 psi | 86% | 3209 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,536 psi | 89% | 3222 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 57,261 psi | 90% | 3130 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,086 psi | 88% | 3189 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,738 psi | 87% | 3189 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 86% | 55,579 psi | 87% | 3199 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,766 psi | 86% | 3232 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,551 psi | 90% | 3343 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 98% | 54,172 psi | 85% | 3258 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,405 psi | 87% | 3143 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,566 psi | 90% | 3274 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,391 psi | 88% | 3392 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,028 psi | 88% | 3205 fps | 98.8% |
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% | 35,621 psi | 56% | 2779 fps | 96.5% |
| Accurate 4350 | <<locked>> | 80% | 46,659 psi | 73% | 3051 fps | 99.8% |
| Accurate High Country | 69.7 gr | 86% | 45,745 psi | 72% | 3130 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 90% | 49,530 psi | 78% | 3192 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 53,374 psi | 84% | 3120 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 41,104 psi | 64% | 2956 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 88% | 44,628 psi | 70% | 3064 fps | 95% |
| ADI AR 2217 | <<locked>> | 98% | 45,890 psi | 72% | 3077 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 94% | 36,593 psi | 57% | 2910 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,423 psi | 65% | 2959 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,423 psi | 65% | 2959 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,700 psi | 68% | 3045 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,357 psi | 79% | 3176 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 41,046 psi | 64% | 2953 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 39,465 psi | 62% | 2953 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,518 psi | 53% | 2802 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 31,488 psi | 49% | 2756 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,477 psi | 57% | 2943 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 41,582 psi | 65% | 3002 fps | 95.6% |
| Bofors RP30 | <<locked>> | 94% | 41,901 psi | 66% | 3041 fps | 95.1% |
| Bofors RP5 | <<locked>> | 84% | 39,465 psi | 62% | 2953 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 48,805 psi | 76% | 3045 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 44,063 psi | 69% | 3041 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 47,500 psi | 74% | 3091 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 49,748 psi | 78% | 3100 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 47,688 psi | 75% | 3074 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,688 psi | 73% | 3051 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,626 psi | 65% | 2927 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 39,175 psi | 61% | 3028 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 46,833 psi | 73% | 3107 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 44% | 1834 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,048 psi | 69% | 2963 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,690 psi | 78% | 3064 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 44,019 psi | 69% | 2986 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 46,311 psi | 73% | 3009 fps | 95.1% |
| IMR 7828 SSC | 70.2 gr | 90% | 45,774 psi | 72% | 3104 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 47,877 psi | 75% | 3018 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 46,296 psi | 73% | 3009 fps | 98.5% |
| Lovex S071 | <<locked>> | 82% | 32,808 psi | 51% | 2703 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 44,063 psi | 69% | 2999 fps | 96.1% |
| Norma 217 | <<locked>> | 98% | 37,536 psi | 59% | 2972 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 36,260 psi | 57% | 2904 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 45,194 psi | 71% | 3028 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 45,963 psi | 72% | 3120 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 43,961 psi | 69% | 3018 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 38,783 psi | 61% | 2923 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 45% | 1877 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,200 psi | 83% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,006 psi | 72% | 3061 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,961 psi | 69% | 3071 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 36,318 psi | 57% | 2936 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 53,301 psi | 84% | 3120 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 45,049 psi | 71% | 2989 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 40,509 psi | 63% | 2936 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 48,805 psi | 76% | 3045 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,877 psi | 75% | 3018 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 46,296 psi | 73% | 3009 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,954 psi | 85% | 3173 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,750 psi | 83% | 2982 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,920 psi | 74% | 2959 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 40,147 psi | 63% | 2933 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 52,866 psi | 83% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 49,327 psi | 77% | 3041 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 42,163 psi | 66% | 2989 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,856 psi | 61% | 2864 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 50,575 psi | 79% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,572 psi | 73% | 3022 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 38,290 psi | 60% | 2841 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 46,108 psi | 72% | 3025 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 37,652 psi | 59% | 2887 fps | 99% |
| Vihtavuori N560 | <<locked>> | 88% | 47,094 psi | 74% | 3143 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 92% | 44,614 psi | 70% | 3071 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,411 psi | 71% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,500 psi | 74% | 3091 fps | 98.6% |
| Winchester StaBALL HD | 64.2 gr | 80% | 30,240 psi | 47% | 2818 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 40,408 psi | 63% | 2897 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 76 powders for 7 x 66 SE v. Hofe loaded with the .284 | 130gr | Barnes X BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,392 fps; across all powders the maximum-charge window runs from 2,051 fps to 3,392 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Accurate High Country, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 130gr | Barnes X BT 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.