Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .287 | 160gr | Woodleigh PP SN bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Vihtavuori N560.
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>> | 92% | 56,304 psi | 88% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,217 psi | 90% | 2963 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 53,940 psi | 85% | 3035 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 90% | 54,853 psi | 86% | 3041 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 88% | 54,259 psi | 85% | 2972 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 55,767 psi | 87% | 3038 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,867 psi | 84% | 3002 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,443 psi | 76% | 2966 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,549 psi | 85% | 2969 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,520 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,406 psi | 90% | 3015 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,014 psi | 88% | 3035 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,479 psi | 90% | 2995 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,203 psi | 90% | 3064 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,259 psi | 85% | 3035 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,575 psi | 79% | 3018 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,159 psi | 90% | 2999 fps | 97.6% |
| Bofors RP15 | <<locked>> | 94% | 55,201 psi | 87% | 3018 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 3077 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 56,014 psi | 88% | 3035 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,376 psi | 87% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,361 psi | 87% | 3028 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 54,940 psi | 86% | 2963 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,232 psi | 90% | 2972 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,492 psi | 87% | 2972 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,534 psi | 85% | 2956 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,824 psi | 86% | 2887 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,985 psi | 88% | 3146 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,347 psi | 87% | 2999 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 58% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,188 psi | 90% | 2949 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,652 psi | 89% | 2930 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,435 psi | 90% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,260 psi | 88% | 2953 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 94% | 57,725 psi | 90% | 3077 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,961 psi | 69% | 2867 fps | 97.9% |
| Lovex S065 | <<locked>> | 84% | 57,537 psi | 90% | 2927 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,854 psi | 88% | 2930 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,537 psi | 90% | 2956 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,534 psi | 85% | 2953 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 44,309 psi | 69% | 2897 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 56,217 psi | 88% | 3054 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,477 psi | 87% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,607 psi | 86% | 3038 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 54,302 psi | 85% | 2953 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,377 psi | 90% | 3031 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,174 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,276 psi | 90% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,593 psi | 87% | 3015 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,014 psi | 89% | 3143 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,115 psi | 88% | 3100 fps | 99% |
| Rottweil R 904 | <<locked>> | 88% | 55,201 psi | 87% | 2940 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 57,101 psi | 89% | 3009 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 55,376 psi | 87% | 2907 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,537 psi | 90% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,854 psi | 88% | 2930 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,521 psi | 89% | 2881 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,666 psi | 89% | 3002 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,666 psi | 89% | 2933 fps | 99% |
| Somchem S365 | <<locked>> | 86% | 56,376 psi | 88% | 2946 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,580 psi | 90% | 2976 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,682 psi | 90% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,130 psi | 90% | 2933 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,188 psi | 90% | 2959 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,318 psi | 88% | 2940 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,202 psi | 88% | 2972 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,898 psi | 88% | 3054 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 96% | 55,999 psi | 88% | 3038 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,768 psi | 89% | 3100 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 3091 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,492 psi | 89% | 2887 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,187 psi | 86% | 2969 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,376 psi | 88% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,464 psi | 90% | 2972 fps | 99.9% |
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% | 37,565 psi | 59% | 2605 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 49,951 psi | 78% | 2854 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,857 psi | 64% | 2779 fps | 96.7% |
| Accurate MAGPRO | <<locked>> | 82% | 41,292 psi | 65% | 2779 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 41,582 psi | 65% | 2736 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 37,144 psi | 58% | 2664 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 88% | 35,940 psi | 56% | 2631 fps | 95% |
| ADI AR 2225 | <<locked>> | 86% | 30,545 psi | 48% | 2536 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,945 psi | 66% | 2736 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,805 psi | 75% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,553 psi | 65% | 2730 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,507 psi | 59% | 2674 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,260 psi | 57% | 2631 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,372 psi | 49% | 2549 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,030 psi | 63% | 2782 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,891 psi | 73% | 2946 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,413 psi | 74% | 2822 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 34,838 psi | 55% | 2608 fps | 95.7% |
| Bofors RP30 | <<locked>> | 86% | 35,259 psi | 55% | 2651 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 37,507 psi | 59% | 2674 fps | 96.9% |
| Bofors RP7 | <<locked>> | 80% | 52,040 psi | 82% | 2854 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,287 psi | 54% | 2592 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 51,372 psi | 81% | 2904 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,795 psi | 84% | 2920 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 39,624 psi | 62% | 2671 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,943 psi | 61% | 2654 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,078 psi | 71% | 2736 fps | 100% |
| Hodgdon Retumbo | 63.7 gr | 82% | 32,721 psi | 51% | 2631 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 51,445 psi | 81% | 2936 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 44% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,398 psi | 74% | 2789 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,301 psi | 84% | 2877 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,326 psi | 74% | 2795 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,191 psi | 65% | 2671 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 38,305 psi | 60% | 2703 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,839 psi | 56% | 2684 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 50,923 psi | 80% | 2825 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,168 psi | 77% | 2818 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,343 psi | 51% | 2480 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 47,601 psi | 75% | 2831 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 31,575 psi | 49% | 2592 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 39,421 psi | 62% | 2746 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 48,660 psi | 76% | 2835 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,462 psi | 56% | 2648 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 47,543 psi | 75% | 2838 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,560 psi | 49% | 2523 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,645 psi | 45% | 1706 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,082 psi | 78% | 2877 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,109 psi | 75% | 2897 fps | 100% |
| ReloadSwiss RS 76 | 66.5 gr | 80% | 29,602 psi | 46% | 2533 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,350 psi | 65% | 2825 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 42,699 psi | 67% | 2710 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 40,944 psi | 64% | 2713 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,040 psi | 82% | 2854 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,923 psi | 80% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,168 psi | 77% | 2818 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,690 psi | 78% | 2772 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,611 psi | 64% | 2710 fps | 97.8% |
| Somchem S361 | <<locked>> | 80% | 43,453 psi | 68% | 2700 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 46,093 psi | 72% | 2792 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,582 psi | 65% | 2697 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 80% | 53,954 psi | 85% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,125 psi | 79% | 2828 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,085 psi | 57% | 2569 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 49,356 psi | 77% | 2831 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,509 psi | 63% | 2707 fps | 100% |
| Vihtavuori N560 | 64.5 gr | 80% | 39,436 psi | 62% | 2733 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 84% | 37,318 psi | 58% | 2671 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 92% | 42,627 psi | 67% | 2838 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 98% | 50,024 psi | 78% | 3025 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,298 psi | 77% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,605 psi | 81% | 2910 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,721 psi | 51% | 2667 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,985 psi | 60% | 2618 fps | 96.9% |
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 74 powders for 7 x 66 SE v. Hofe loaded with the .287 | 160gr | Woodleigh PP SN. Hodgdon Retumbo delivers the highest muzzle velocity at 3,146 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,146 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 160.0 gr projectile in 0.287" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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. Hodgdon Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for 7 x 66 SE v. Hofe with the .287 | 160gr | Woodleigh PP SN 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.