Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 175gr | Barnes Solid RN 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 Winchester StaBALL HD.
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% | 54,650 psi | 86% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,477 psi | 87% | 2808 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 56,333 psi | 88% | 2949 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 57,246 psi | 90% | 2956 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 88% | 56,405 psi | 88% | 2881 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 54,404 psi | 85% | 2894 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,159 psi | 88% | 2920 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 48,689 psi | 76% | 2890 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,502 psi | 79% | 2884 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,463 psi | 88% | 2874 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,463 psi | 88% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,666 psi | 89% | 2864 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,811 psi | 87% | 2867 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,795 psi | 86% | 2890 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,188 psi | 88% | 2848 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 55,825 psi | 87% | 2917 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 56,884 psi | 89% | 2943 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2949 fps | 97.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,332 psi | 87% | 2854 fps | 98% |
| Bofors RP15 | <<locked>> | 94% | 57,624 psi | 90% | 2930 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 55,608 psi | 87% | 2933 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 54,795 psi | 86% | 2890 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,043 psi | 89% | 2812 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,740 psi | 90% | 2940 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 56,840 psi | 89% | 2864 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 57,624 psi | 90% | 2884 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,637 psi | 89% | 2867 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,695 psi | 89% | 2785 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 54,766 psi | 86% | 3002 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 57,580 psi | 90% | 2907 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,420 psi | 59% | 1772 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,492 psi | 87% | 2802 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,796 psi | 87% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 54,766 psi | 86% | 2808 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 56,217 psi | 88% | 2930 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,195 psi | 72% | 2802 fps | 99% |
| Lovex S065 | <<locked>> | 82% | 55,840 psi | 88% | 2776 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,259 psi | 85% | 2779 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,144 psi | 88% | 2812 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,579 psi | 89% | 2861 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 46,731 psi | 73% | 2825 fps | 100% |
| Norma MRP | <<locked>> | 88% | 54,621 psi | 86% | 2904 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,624 psi | 90% | 2844 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 57,261 psi | 90% | 2953 fps | 100% |
| Ramshot Hunter | <<locked>> | 84% | 56,391 psi | 88% | 2858 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 55,550 psi | 87% | 2881 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,348 psi | 60% | 1818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,695 psi | 87% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 53,896 psi | 84% | 2861 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 55,405 psi | 87% | 2995 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 54,766 psi | 86% | 2959 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 88% | 57,188 psi | 90% | 2848 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 55,492 psi | 87% | 2861 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,043 psi | 89% | 2812 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,840 psi | 88% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,259 psi | 85% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,853 psi | 86% | 2733 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,071 psi | 86% | 2854 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 54,853 psi | 86% | 2785 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 54,868 psi | 86% | 2795 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,825 psi | 87% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,347 psi | 87% | 2782 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,593 psi | 87% | 2815 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 54,520 psi | 85% | 2831 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 82% | 54,737 psi | 86% | 2792 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 54,694 psi | 86% | 2825 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 54,273 psi | 85% | 2907 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 54,520 psi | 85% | 2894 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 55,419 psi | 87% | 2959 fps | 99.1% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 56,463 psi | 88% | 3018 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,723 psi | 86% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,101 psi | 89% | 2867 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,187 psi | 86% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,811 psi | 87% | 2828 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% | 39,175 psi | 61% | 2530 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 51,866 psi | 81% | 2756 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 42,641 psi | 67% | 2707 fps | 98% |
| Accurate MAGPRO | <<locked>> | 80% | 40,263 psi | 63% | 2644 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 80% | 43,178 psi | 68% | 2654 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 38,653 psi | 61% | 2595 fps | 96.7% |
| ADI AR 2217 | <<locked>> | 86% | 35,056 psi | 55% | 2510 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 98% | 45,310 psi | 71% | 2818 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 82% | 28,065 psi | 44% | 2365 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,526 psi | 68% | 2654 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,526 psi | 68% | 2654 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,792 psi | 78% | 2762 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,120 psi | 68% | 2648 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,175 psi | 61% | 2605 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,826 psi | 59% | 2549 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,721 psi | 51% | 2484 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,134 psi | 66% | 2707 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 45,730 psi | 72% | 2815 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 43,250 psi | 68% | 2631 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 36,463 psi | 57% | 2539 fps | 97.3% |
| Bofors RP30 | <<locked>> | 82% | 32,271 psi | 51% | 2467 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 39,175 psi | 61% | 2605 fps | 98.2% |
| Bofors RP7 | <<locked>> | 80% | 53,548 psi | 84% | 2756 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 33,359 psi | 52% | 2470 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 53,330 psi | 84% | 2812 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,205 psi | 65% | 2595 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,466 psi | 63% | 2582 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,862 psi | 73% | 2641 fps | 100% |
| Hodgdon Retumbo | 60.3 gr | 80% | 32,010 psi | 50% | 2513 fps | 96.5% |
| Hodgdon Superformance | <<locked>> | 80% | 53,693 psi | 84% | 2848 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,152 psi | 44% | 1585 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,921 psi | 77% | 2697 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 49,052 psi | 77% | 2700 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,569 psi | 67% | 2592 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 37,347 psi | 59% | 2575 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 90% | 33,083 psi | 52% | 2510 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 52,431 psi | 82% | 2726 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,966 psi | 80% | 2726 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,881 psi | 53% | 2415 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 49,458 psi | 78% | 2746 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 29,080 psi | 46% | 2421 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 41,162 psi | 65% | 2667 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 50,604 psi | 79% | 2743 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,985 psi | 58% | 2579 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 80% | 49,414 psi | 77% | 2749 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,170 psi | 52% | 2467 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,863 psi | 45% | 1624 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,967 psi | 81% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,154 psi | 79% | 2805 fps | 100% |
| ReloadSwiss RS 76 | 64.5 gr | 80% | 30,966 psi | 49% | 2484 fps | 97.2% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 37,449 psi | 59% | 2631 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 44,338 psi | 69% | 2631 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 80% | 42,743 psi | 67% | 2638 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 80% | 53,548 psi | 84% | 2756 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,431 psi | 82% | 2726 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,966 psi | 80% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,459 psi | 81% | 2684 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,395 psi | 66% | 2635 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 44,991 psi | 71% | 2618 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 47,993 psi | 75% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,192 psi | 68% | 2618 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 51,880 psi | 81% | 2733 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,521 psi | 59% | 2497 fps | 98.2% |
| Vihtavuori N170 | <<locked>> | 94% | 50,894 psi | 80% | 2772 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 51,155 psi | 80% | 2740 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,351 psi | 66% | 2625 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,089 psi | 64% | 2661 fps | 97% |
| Vihtavuori N565 | <<locked>> | 82% | 36,405 psi | 57% | 2546 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 88% | 38,986 psi | 61% | 2651 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 94% | 45,571 psi | 71% | 2825 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,126 psi | 80% | 2687 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,548 psi | 84% | 2818 fps | 100% |
| Winchester StaBALL HD | 61.9 gr | 80% | 34,911 psi | 55% | 2602 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,581 psi | 62% | 2549 fps | 98.2% |
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 .284 | 175gr | Barnes Solid RN. Vihtavuori N570 delivers the highest muzzle velocity at 3,018 fps; across all powders the maximum-charge window runs from 1,772 fps to 3,018 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 59–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 175gr | Barnes Solid RN 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.