Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 157gr | CutEdge MTAC bullet and 76 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% | 55,013 psi | 86% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,507 psi | 89% | 2979 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,869 psi | 89% | 3107 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 92% | 53,795 psi | 84% | 3045 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 57,450 psi | 90% | 2936 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,421 psi | 90% | 3045 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 55,332 psi | 87% | 3051 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,559 psi | 78% | 2946 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,063 psi | 69% | 2904 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,508 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,969 psi | 86% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,884 psi | 89% | 3031 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,288 psi | 87% | 3045 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,318 psi | 88% | 3009 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,927 psi | 88% | 3077 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,913 psi | 89% | 3104 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,087 psi | 89% | 3012 fps | 97.1% |
| Bofors RP15 | <<locked>> | 96% | 54,215 psi | 85% | 3028 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,735 psi | 81% | 3015 fps | 99.1% |
| Bofors RP5 | <<locked>> | 94% | 55,288 psi | 87% | 3045 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 55,129 psi | 86% | 2927 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3035 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 54,549 psi | 85% | 2979 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 57,130 psi | 90% | 2992 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 55,129 psi | 86% | 2986 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,114 psi | 85% | 2969 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,653 psi | 90% | 2953 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,766 psi | 86% | 3153 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,085 psi | 86% | 3022 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 58% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,000 psi | 89% | 2969 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,710 psi | 89% | 2949 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,768 psi | 89% | 2969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,043 psi | 88% | 2966 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 96% | 56,913 psi | 89% | 3087 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 39,334 psi | 62% | 2795 fps | 96.1% |
| Lovex S065 | <<locked>> | 86% | 57,319 psi | 90% | 2946 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,506 psi | 87% | 2943 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 2959 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,186 psi | 85% | 2966 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 39,378 psi | 62% | 2822 fps | 98.4% |
| Norma MRP | <<locked>> | 92% | 55,071 psi | 86% | 3064 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,042 psi | 86% | 2963 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,606 psi | 84% | 3045 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 57,624 psi | 90% | 3028 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,057 psi | 88% | 3038 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1903 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,550 psi | 89% | 3002 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,955 psi | 86% | 3035 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 3150 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,299 psi | 79% | 3031 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 56,376 psi | 88% | 2920 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,998 psi | 86% | 2953 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 56,434 psi | 88% | 3018 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 55,129 psi | 86% | 2927 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,319 psi | 90% | 2946 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,506 psi | 87% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,434 psi | 88% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,550 psi | 89% | 2900 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,999 psi | 88% | 3015 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 56,202 psi | 88% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,507 psi | 89% | 2949 fps | 98.7% |
| Somchem S365 | <<locked>> | 88% | 55,434 psi | 87% | 2963 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,898 psi | 89% | 2992 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 57,435 psi | 90% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,855 psi | 89% | 2956 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,521 psi | 89% | 2969 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 55,753 psi | 87% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,897 psi | 86% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,926 psi | 86% | 3061 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 98% | 54,723 psi | 86% | 3041 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,416 psi | 81% | 3035 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,333 psi | 88% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,795 psi | 86% | 2986 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,259 psi | 85% | 3094 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,956 psi | 89% | 2989 fps | 99.8% |
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% | 33,895 psi | 53% | 2546 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 45,788 psi | 72% | 2808 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 39,740 psi | 62% | 2779 fps | 96% |
| Accurate MAGPRO | <<locked>> | 86% | 43,395 psi | 68% | 2848 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 53,838 psi | 84% | 2884 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,319 psi | 60% | 2684 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 39,015 psi | 61% | 2730 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 92% | 37,666 psi | 59% | 2694 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 90% | 31,531 psi | 49% | 2585 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,019 psi | 69% | 2815 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,082 psi | 80% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,319 psi | 60% | 2677 fps | 96.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,939 psi | 53% | 2612 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,721 psi | 51% | 2575 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,427 psi | 45% | 2480 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,955 psi | 56% | 2720 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,212 psi | 79% | 2890 fps | 95.5% |
| Bofors RP15 | <<locked>> | 84% | 36,289 psi | 57% | 2671 fps | 95.9% |
| Bofors RP30 | <<locked>> | 90% | 36,376 psi | 57% | 2703 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 33,939 psi | 53% | 2612 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 48,573 psi | 76% | 2815 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 35,969 psi | 56% | 2654 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 47,529 psi | 74% | 2861 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 50,154 psi | 79% | 2877 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 41,887 psi | 66% | 2743 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 40,959 psi | 64% | 2720 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,568 psi | 65% | 2697 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,910 psi | 53% | 2687 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 47,413 psi | 74% | 2890 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 43% | 1660 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,135 psi | 69% | 2749 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,096 psi | 79% | 2841 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 43,598 psi | 68% | 2753 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,669 psi | 64% | 2677 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 86% | 40,190 psi | 63% | 2769 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 36,825 psi | 58% | 2733 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,442 psi | 74% | 2785 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,643 psi | 72% | 2776 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 29,095 psi | 46% | 2418 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 44,048 psi | 69% | 2785 fps | 97.9% |
| Norma 217 | <<locked>> | 94% | 32,039 psi | 50% | 2631 fps | 95.6% |
| Norma MRP | 62.1 gr | 80% | 35,650 psi | 56% | 2684 fps | 97.2% |
| Norma URP | <<locked>> | 80% | 44,933 psi | 70% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 37,043 psi | 58% | 2710 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 43,859 psi | 69% | 2795 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 32,924 psi | 52% | 2582 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,224 psi | 44% | 1703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,788 psi | 72% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,222 psi | 69% | 2851 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 30,705 psi | 48% | 2592 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,888 psi | 67% | 2884 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 52,736 psi | 83% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,726 psi | 62% | 2664 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 37,463 psi | 59% | 2661 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 48,573 psi | 76% | 2815 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,442 psi | 74% | 2785 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,643 psi | 72% | 2776 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,040 psi | 83% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,340 psi | 73% | 2733 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,144 psi | 58% | 2654 fps | 96.3% |
| Somchem S355 | <<locked>> | 80% | 52,634 psi | 82% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 40,321 psi | 63% | 2651 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 42,090 psi | 66% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,971 psi | 60% | 2641 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 80% | 50,328 psi | 79% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,514 psi | 73% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,909 psi | 52% | 2513 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 45,818 psi | 72% | 2795 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,593 psi | 57% | 2654 fps | 99.7% |
| Vihtavuori N560 | 65.2 gr | 84% | 41,408 psi | 65% | 2805 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 88% | 38,493 psi | 60% | 2723 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 96% | 44,469 psi | 70% | 2904 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,614 psi | 71% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,761 psi | 75% | 2864 fps | 99.6% |
| Winchester StaBALL HD | 61.4 gr | 80% | 28,906 psi | 45% | 2592 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,664 psi | 54% | 2562 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 76 powders for 7 x 66 SE v. Hofe loaded with the .284 | 157gr | CutEdge MTAC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,153 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 157.0 gr projectile in 0.284" calls for a 1:9.0 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 157gr | CutEdge MTAC 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.