Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .287 | 175gr | Woodleigh PP SN bullet and 70 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 ReloadSwiss RS 80.
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>> | 90% | 55,434 psi | 87% | 2805 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,405 psi | 88% | 2825 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 57,145 psi | 90% | 2963 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 88% | 54,157 psi | 85% | 2910 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 57,203 psi | 90% | 2897 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 55,172 psi | 86% | 2907 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 2936 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 49,530 psi | 78% | 2910 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,590 psi | 81% | 2904 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,348 psi | 90% | 2877 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,579 psi | 89% | 2881 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,550 psi | 87% | 2904 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,985 psi | 89% | 2858 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,869 psi | 89% | 2933 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,711 psi | 90% | 2953 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 2969 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,043 psi | 88% | 2871 fps | 98.2% |
| Bofors RP15 | <<locked>> | 92% | 54,752 psi | 86% | 2890 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 56,579 psi | 89% | 2946 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 55,550 psi | 87% | 2904 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,638 psi | 90% | 2822 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 54,810 psi | 86% | 2900 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 57,696 psi | 90% | 2881 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 54,694 psi | 86% | 2841 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,377 psi | 90% | 2884 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,609 psi | 90% | 2799 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,782 psi | 87% | 3018 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 59% | 1781 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,057 psi | 88% | 2812 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,652 psi | 89% | 2815 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,463 psi | 87% | 2822 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 92% | 57,276 psi | 90% | 2946 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,079 psi | 74% | 2815 fps | 99.2% |
| Lovex S065 | <<locked>> | 82% | 56,405 psi | 88% | 2789 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,868 psi | 86% | 2792 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,884 psi | 89% | 2825 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,319 psi | 90% | 2874 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 47,718 psi | 75% | 2841 fps | 100% |
| Norma MRP | <<locked>> | 88% | 55,405 psi | 87% | 2917 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,607 psi | 86% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 54,172 psi | 85% | 2910 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 57,188 psi | 90% | 2871 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,507 psi | 89% | 2897 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,493 psi | 60% | 1824 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,565 psi | 89% | 2851 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,766 psi | 86% | 2877 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,637 psi | 89% | 3015 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 55,651 psi | 87% | 2976 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 54,375 psi | 85% | 2808 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 56,304 psi | 88% | 2874 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,638 psi | 90% | 2822 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,405 psi | 88% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,868 psi | 86% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,347 psi | 87% | 2746 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,898 psi | 88% | 2871 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 55,695 psi | 87% | 2802 fps | 99.4% |
| Somchem S365 | <<locked>> | 84% | 55,564 psi | 87% | 2808 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,840 psi | 89% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,246 psi | 88% | 2799 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,521 psi | 89% | 2828 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 55,274 psi | 87% | 2848 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 82% | 55,317 psi | 87% | 2802 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,579 psi | 87% | 2838 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,027 psi | 86% | 2920 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 55,448 psi | 87% | 2910 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 56,594 psi | 89% | 2979 fps | 99.3% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3038 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,434 psi | 87% | 2749 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,217 psi | 88% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,507 psi | 89% | 2841 fps | 100% |
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% | 39,900 psi | 63% | 2546 fps | 99.7% |
| Accurate 4350 | <<locked>> | 80% | 52,823 psi | 83% | 2772 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,410 psi | 68% | 2723 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 80% | 40,973 psi | 64% | 2664 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 80% | 43,758 psi | 69% | 2667 fps | 99% |
| ADI AR 2213 | <<locked>> | 80% | 39,146 psi | 61% | 2608 fps | 97% |
| ADI AR 2217 | <<locked>> | 84% | 33,388 psi | 52% | 2470 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 98% | 46,137 psi | 72% | 2841 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 82% | 28,442 psi | 45% | 2379 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,502 psi | 79% | 2776 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,874 psi | 69% | 2664 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,711 psi | 62% | 2615 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,450 psi | 60% | 2562 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,214 psi | 52% | 2497 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,960 psi | 67% | 2723 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 43,308 psi | 68% | 2766 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 43,758 psi | 69% | 2644 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 37,014 psi | 58% | 2556 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 32,953 psi | 52% | 2487 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 39,711 psi | 62% | 2615 fps | 98.3% |
| Bofors RP7 | <<locked>> | 80% | 54,143 psi | 85% | 2769 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 31,633 psi | 50% | 2425 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 53,954 psi | 85% | 2825 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,742 psi | 65% | 2612 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,002 psi | 64% | 2595 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,529 psi | 74% | 2654 fps | 100% |
| Hodgdon Retumbo | 61.1 gr | 80% | 32,503 psi | 51% | 2530 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,224 psi | 44% | 1591 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,472 psi | 78% | 2710 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 49,893 psi | 78% | 2717 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,062 psi | 67% | 2605 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 80% | 37,869 psi | 59% | 2589 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 90% | 33,692 psi | 53% | 2526 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 53,040 psi | 83% | 2736 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,561 psi | 81% | 2740 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,461 psi | 54% | 2428 fps | 98.9% |
| Norma 204 | <<locked>> | 80% | 50,024 psi | 78% | 2759 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 29,515 psi | 46% | 2434 fps | 96% |
| Norma MRP | <<locked>> | 80% | 41,945 psi | 66% | 2687 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 51,242 psi | 80% | 2756 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,681 psi | 59% | 2598 fps | 97% |
| Ramshot Hunter | <<locked>> | 80% | 49,980 psi | 78% | 2759 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,634 psi | 53% | 2480 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,950 psi | 45% | 1631 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,837 psi | 83% | 2799 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,010 psi | 80% | 2822 fps | 100% |
| ReloadSwiss RS 76 | 65.4 gr | 80% | 31,502 psi | 49% | 2500 fps | 97.5% |
| ReloadSwiss RS 80 | 72.5 gr | 88% | 38,247 psi | 60% | 2651 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 44,889 psi | 70% | 2644 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 80% | 43,323 psi | 68% | 2651 fps | 99% |
| Rottweil R 907 | <<locked>> | 80% | 54,143 psi | 85% | 2769 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,040 psi | 83% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,561 psi | 81% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,996 psi | 81% | 2694 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,975 psi | 67% | 2648 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 45,629 psi | 72% | 2635 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 48,675 psi | 76% | 2710 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,772 psi | 69% | 2631 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 52,750 psi | 83% | 2746 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,203 psi | 60% | 2513 fps | 98.4% |
| Vihtavuori N170 | <<locked>> | 94% | 51,663 psi | 81% | 2789 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 51,953 psi | 81% | 2753 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,004 psi | 67% | 2638 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,829 psi | 66% | 2677 fps | 97.3% |
| Vihtavuori N565 | <<locked>> | 80% | 34,577 psi | 54% | 2500 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 88% | 39,624 psi | 62% | 2667 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 94% | 46,441 psi | 73% | 2844 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,851 psi | 81% | 2700 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,636 psi | 56% | 2612 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,074 psi | 63% | 2559 fps | 98.3% |
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 .287 | 175gr | Woodleigh PP SN. Vihtavuori N570 delivers the highest muzzle velocity at 3,038 fps; across all powders the maximum-charge window runs from 1,781 fps to 3,038 fps. Accurate 8700 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 59–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.287" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2217, ADI AR 2218 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, ReloadSwiss RS 80 rank at the top here: for 7 x 66 SE v. Hofe with the .287 | 175gr | Woodleigh PP SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, Lovex D100, Shooters World 50 BMG 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.