Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 145gr | CutEdge LZR MAX bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP 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% | 55,085 psi | 86% | 3051 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,797 psi | 89% | 3094 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,041 psi | 85% | 3150 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 54,708 psi | 86% | 3002 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,186 psi | 85% | 3097 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 55,535 psi | 87% | 3156 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,296 psi | 73% | 2972 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,988 psi | 64% | 2927 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,825 psi | 87% | 3025 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,259 psi | 85% | 3104 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,114 psi | 86% | 3114 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,174 psi | 90% | 3140 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,245 psi | 87% | 3150 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,188 psi | 88% | 3120 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,967 psi | 81% | 3123 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,898 psi | 89% | 3219 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,143 psi | 85% | 3130 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 56,869 psi | 89% | 3045 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,819 psi | 75% | 3048 fps | 97.8% |
| Bofors RP5 | <<locked>> | 96% | 55,245 psi | 87% | 3150 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 55,898 psi | 88% | 3041 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,068 psi | 80% | 3071 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 82% | 56,913 psi | 89% | 3064 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,882 psi | 86% | 3094 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 54,317 psi | 85% | 3054 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 55,680 psi | 87% | 3094 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,418 psi | 85% | 3074 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,447 psi | 85% | 3018 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,865 psi | 80% | 3189 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 55,405 psi | 87% | 3133 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,767 psi | 58% | 1929 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,595 psi | 90% | 3038 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,537 psi | 90% | 3081 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,493 psi | 90% | 3068 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 57,087 psi | 89% | 3084 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,826 psi | 89% | 3077 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 98% | 56,956 psi | 89% | 3192 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 54,447 psi | 85% | 3009 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,057 psi | 88% | 3061 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 88% | 54,853 psi | 86% | 3081 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 36,419 psi | 57% | 2838 fps | 96.5% |
| Norma MRP | <<locked>> | 94% | 55,114 psi | 86% | 3176 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 55,405 psi | 87% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,722 psi | 84% | 3150 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 54,201 psi | 85% | 3081 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,072 psi | 88% | 3143 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,550 psi | 59% | 1975 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,855 psi | 89% | 3054 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,723 psi | 86% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,869 psi | 89% | 3120 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,230 psi | 87% | 3150 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,488 psi | 81% | 3186 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 56,971 psi | 89% | 3041 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,506 psi | 87% | 3064 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 94% | 56,623 psi | 89% | 3130 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 55,898 psi | 88% | 3041 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,447 psi | 85% | 3009 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,057 psi | 88% | 3061 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,085 psi | 86% | 3051 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,261 psi | 90% | 2910 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,348 psi | 90% | 3015 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,217 psi | 88% | 3123 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 56,666 psi | 89% | 3035 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,130 psi | 90% | 3054 fps | 98.2% |
| Somchem S365 | <<locked>> | 90% | 55,521 psi | 87% | 3081 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,145 psi | 90% | 3097 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 54,491 psi | 85% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,319 psi | 90% | 3071 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,681 psi | 89% | 3074 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 56,347 psi | 88% | 3074 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,839 psi | 86% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,071 psi | 86% | 3169 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,404 psi | 85% | 3136 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,101 psi | 89% | 3028 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,129 psi | 86% | 3097 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,476 psi | 84% | 3202 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,508 psi | 90% | 3100 fps | 99.4% |
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% | 31,502 psi | 49% | 2572 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 42,844 psi | 67% | 2854 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 46,673 psi | 73% | 3012 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 51,488 psi | 81% | 2953 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,609 psi | 61% | 2782 fps | 95.6% |
| ADI AR 2213 | 66.3 gr | 88% | 42,177 psi | 66% | 2894 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 98% | 43,192 psi | 68% | 2907 fps | 96% |
| ADI AR 2225 | <<locked>> | 94% | 33,562 psi | 53% | 2726 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,286 psi | 82% | 2969 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,452 psi | 65% | 2871 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,732 psi | 75% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,479 psi | 60% | 2776 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 84% | 36,521 psi | 57% | 2769 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,429 psi | 48% | 2608 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,298 psi | 47% | 2625 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,127 psi | 52% | 2743 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 38,812 psi | 61% | 2825 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 53,185 psi | 83% | 2989 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 38,682 psi | 61% | 2851 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 36,521 psi | 57% | 2769 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 46,093 psi | 72% | 2867 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 38,638 psi | 61% | 2805 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 53,229 psi | 83% | 3009 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,904 psi | 70% | 2913 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 47,674 psi | 75% | 2933 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 45,107 psi | 71% | 2904 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,295 psi | 69% | 2884 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,943 psi | 61% | 2746 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,187 psi | 57% | 2841 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 44,280 psi | 69% | 2933 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,499 psi | 43% | 1726 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,186 psi | 85% | 2986 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,742 psi | 65% | 2792 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,645 psi | 75% | 2897 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 40,915 psi | 64% | 2802 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,845 psi | 69% | 2838 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 90% | 43,149 psi | 68% | 2930 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 44,976 psi | 70% | 2841 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 43,352 psi | 68% | 2828 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 30,922 psi | 48% | 2556 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 41,437 psi | 65% | 2825 fps | 96.4% |
| Norma 217 | <<locked>> | 98% | 33,953 psi | 53% | 2769 fps | 95.3% |
| Norma MRP | 62.2 gr | 80% | 33,083 psi | 52% | 2710 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 42,438 psi | 67% | 2848 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 39,929 psi | 63% | 2867 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 41,162 psi | 65% | 2838 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 35,534 psi | 56% | 2736 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,069 psi | 83% | 2992 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,749 psi | 80% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,975 psi | 67% | 2877 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,350 psi | 65% | 2894 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,098 psi | 52% | 2746 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 50,009 psi | 78% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,699 psi | 67% | 2822 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 82% | 37,565 psi | 59% | 2756 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 46,093 psi | 72% | 2867 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,976 psi | 70% | 2841 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 43,352 psi | 68% | 2828 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,358 psi | 80% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,560 psi | 79% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,961 psi | 69% | 2782 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,260 psi | 58% | 2749 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 49,908 psi | 78% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,642 psi | 68% | 2812 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 39,146 psi | 61% | 2799 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,737 psi | 56% | 2680 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,892 psi | 75% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,787 psi | 69% | 2841 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 35,331 psi | 55% | 2664 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,178 psi | 68% | 2844 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 34,011 psi | 53% | 2687 fps | 98.8% |
| Vihtavuori N560 | 68.4 gr | 88% | 44,454 psi | 70% | 2966 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 92% | 41,147 psi | 64% | 2881 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,888 psi | 67% | 2805 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,904 psi | 70% | 2913 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,803 psi | 42% | 2598 fps | 98.7% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,449 psi | 59% | 2720 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 85 powders for 7 x 66 SE v. Hofe loaded with the .284 | 145gr | CutEdge LZR MAX. Alliant Reloder-26 delivers the highest muzzle velocity at 3,219 fps; across all powders the maximum-charge window runs from 1,929 fps to 3,219 fps. ADI AR 2217 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 145.0 gr projectile in 0.284" calls for a 1:8.5 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. Vihtavuori N560, Norma MRP, ADI AR 2213 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 145gr | CutEdge LZR MAX they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 7977 Enduron, IMR 8133 Enduron, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.