Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 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.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 54,911 psi | 86% | 3097 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,115 psi | 88% | 3136 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,537 psi | 90% | 3261 fps | 98% |
| ADI AR 2208 | <<locked>> | 82% | 57,014 psi | 89% | 3094 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,116 psi | 90% | 3199 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 54,723 psi | 86% | 3196 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,182 psi | 77% | 3081 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,932 psi | 69% | 3038 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,348 psi | 90% | 3192 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,014 psi | 89% | 3196 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,273 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,637 psi | 89% | 3182 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,737 psi | 86% | 3192 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,057 psi | 88% | 3166 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 3225 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,652 psi | 89% | 3261 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,681 psi | 89% | 3153 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 57,464 psi | 90% | 3235 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,488 psi | 81% | 3163 fps | 98.4% |
| Bofors RP5 | <<locked>> | 94% | 54,737 psi | 86% | 3192 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 54,853 psi | 86% | 3077 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3179 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 84% | 54,244 psi | 85% | 3133 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 56,840 psi | 89% | 3150 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 54,679 psi | 86% | 3130 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,305 psi | 90% | 3176 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,406 psi | 90% | 3110 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,331 psi | 85% | 3301 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 54,462 psi | 85% | 3166 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1985 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,478 psi | 89% | 3120 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,434 psi | 88% | 3104 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 56,652 psi | 89% | 3130 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,898 psi | 88% | 3117 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 96% | 56,333 psi | 88% | 3235 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 57,087 psi | 89% | 3104 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,216 psi | 87% | 3097 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,130 psi | 88% | 3114 fps | 100% |
| Norma 204 | <<locked>> | 86% | 53,838 psi | 84% | 3117 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 39,552 psi | 62% | 2956 fps | 97.5% |
| Norma MRP | <<locked>> | 92% | 54,650 psi | 86% | 3215 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 54,592 psi | 86% | 3117 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,246 psi | 90% | 3258 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 57,232 psi | 90% | 3182 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,840 psi | 88% | 3186 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 2031 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,318 psi | 88% | 3159 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,650 psi | 86% | 3192 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 3297 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,966 psi | 78% | 3166 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 82% | 56,289 psi | 88% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,636 psi | 86% | 3100 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 55,985 psi | 88% | 3169 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 54,853 psi | 86% | 3077 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,087 psi | 89% | 3104 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,216 psi | 87% | 3097 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,043 psi | 88% | 2946 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,405 psi | 88% | 3054 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,550 psi | 87% | 3163 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 55,912 psi | 88% | 3077 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,217 psi | 88% | 3094 fps | 98% |
| Somchem S365 | <<locked>> | 88% | 54,940 psi | 86% | 3120 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,492 psi | 89% | 3140 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 57,276 psi | 90% | 3045 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,304 psi | 88% | 3110 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,144 psi | 88% | 3120 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 55,579 psi | 87% | 3114 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,534 psi | 85% | 3140 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,505 psi | 85% | 3209 fps | 98% |
| Vihtavuori N565 | <<locked>> | 98% | 54,447 psi | 85% | 3186 fps | 98.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,140 psi | 80% | 3173 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,028 psi | 88% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,418 psi | 85% | 3136 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,737 psi | 84% | 3251 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,565 psi | 89% | 3133 fps | 99.3% |
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% | 34,098 psi | 53% | 2677 fps | 96.8% |
| Accurate 4350 | <<locked>> | 80% | 45,745 psi | 72% | 2956 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 88% | 46,470 psi | 73% | 3051 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 53,650 psi | 84% | 3041 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,159 psi | 60% | 2815 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 86% | 41,756 psi | 65% | 2930 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 96% | 43,004 psi | 67% | 2949 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 92% | 33,852 psi | 53% | 2772 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,508 psi | 60% | 2818 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,801 psi | 69% | 2966 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,676 psi | 79% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,145 psi | 60% | 2812 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 39,059 psi | 61% | 2874 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,808 psi | 51% | 2713 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,443 psi | 48% | 2664 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,752 psi | 56% | 2851 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,359 psi | 84% | 3091 fps | 95.3% |
| Bofors RP15 | <<locked>> | 86% | 38,740 psi | 61% | 2861 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 39,088 psi | 61% | 2900 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 39,059 psi | 61% | 2874 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 48,530 psi | 76% | 2966 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 92% | 41,234 psi | 65% | 2913 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 47,471 psi | 74% | 3009 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 49,908 psi | 78% | 3025 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 44,556 psi | 70% | 2936 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,801 psi | 69% | 2920 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,379 psi | 65% | 2841 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,274 psi | 57% | 2884 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 47,094 psi | 74% | 3035 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,731 psi | 43% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,932 psi | 69% | 2887 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,821 psi | 78% | 2992 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 43,511 psi | 68% | 2900 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,323 psi | 68% | 2874 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 88% | 42,888 psi | 67% | 2969 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 47,442 psi | 74% | 2936 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 45,614 psi | 71% | 2923 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 31,372 psi | 49% | 2605 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 43,961 psi | 69% | 2923 fps | 97% |
| Norma 217 | <<locked>> | 96% | 34,548 psi | 54% | 2822 fps | 95.4% |
| Norma MRP | 65.7 gr | 80% | 35,665 psi | 56% | 2815 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 44,788 psi | 70% | 2943 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 39,842 psi | 62% | 2910 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 43,801 psi | 69% | 2940 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 35,563 psi | 56% | 2776 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,326 psi | 44% | 1821 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,672 psi | 72% | 2976 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,874 psi | 69% | 2992 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,185 psi | 52% | 2785 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,296 psi | 73% | 3091 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 52,663 psi | 83% | 3025 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,221 psi | 66% | 2858 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 37,391 psi | 59% | 2792 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 48,530 psi | 76% | 2966 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,442 psi | 74% | 2936 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 45,614 psi | 71% | 2923 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,649 psi | 83% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,427 psi | 73% | 2881 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,086 psi | 58% | 2789 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 52,605 psi | 82% | 3025 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 46,093 psi | 72% | 2907 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 41,901 psi | 66% | 2897 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,072 psi | 60% | 2779 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 50,183 psi | 79% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,253 psi | 72% | 2940 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 35,244 psi | 55% | 2700 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 45,730 psi | 72% | 2943 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 36,753 psi | 58% | 2792 fps | 99.3% |
| Vihtavuori N560 | 70.6 gr | 86% | 44,222 psi | 69% | 3005 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 92% | 44,266 psi | 69% | 2989 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 98% | 47,456 psi | 74% | 3104 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,411 psi | 71% | 2894 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,471 psi | 74% | 3009 fps | 99.1% |
| Winchester StaBALL HD | 65 gr | 80% | 29,138 psi | 46% | 2720 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,318 psi | 58% | 2759 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 75 powders for 7 x 66 SE v. Hofe loaded with the .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,301 fps; across all powders the maximum-charge window runs from 1,985 fps to 3,301 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 140.0 gr projectile in 0.284" calls for a 1:12.5 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC 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.