Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 170gr | Norma VULKAN bullet and 69 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 Accurate MAGPRO.
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% | 55,347 psi | 87% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,101 psi | 88% | 2864 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,868 psi | 86% | 2956 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 88% | 56,956 psi | 89% | 2933 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 55,056 psi | 86% | 2949 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,898 psi | 89% | 2976 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 49,443 psi | 77% | 2946 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,198 psi | 80% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,276 psi | 90% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,318 psi | 88% | 2920 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,448 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,927 psi | 89% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,594 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,725 psi | 90% | 2995 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3005 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,811 psi | 87% | 2907 fps | 98% |
| Bofors RP15 | <<locked>> | 92% | 54,650 psi | 86% | 2930 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 56,434 psi | 88% | 2989 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 55,448 psi | 87% | 2943 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,392 psi | 90% | 2861 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,723 psi | 86% | 2940 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 54,824 psi | 86% | 2858 fps | 100% |
| Hodgdon H4831 | <<locked>> | 92% | 54,172 psi | 85% | 2874 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,261 psi | 90% | 2923 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,232 psi | 90% | 2838 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,448 psi | 87% | 3058 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,594 psi | 59% | 1814 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,956 psi | 88% | 2854 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,476 psi | 85% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,245 psi | 87% | 2861 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 90% | 57,116 psi | 90% | 2989 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,746 psi | 73% | 2848 fps | 99% |
| Lovex S065 | <<locked>> | 82% | 56,188 psi | 88% | 2828 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,621 psi | 86% | 2831 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,811 psi | 89% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,116 psi | 90% | 2913 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 47,340 psi | 74% | 2874 fps | 100% |
| Norma MRP | <<locked>> | 88% | 55,259 psi | 87% | 2959 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,375 psi | 85% | 2844 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,014 psi | 89% | 2992 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 56,985 psi | 89% | 2910 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 54,099 psi | 85% | 2904 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,522 psi | 60% | 1857 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,115 psi | 88% | 2887 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,520 psi | 85% | 2913 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,304 psi | 88% | 3051 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 55,521 psi | 87% | 3015 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 88% | 57,696 psi | 90% | 2904 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 56,057 psi | 88% | 2910 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,392 psi | 90% | 2861 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,188 psi | 88% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,621 psi | 86% | 2831 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,100 psi | 86% | 2782 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,651 psi | 87% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 55,376 psi | 87% | 2838 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 55,463 psi | 87% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,579 psi | 89% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,912 psi | 88% | 2835 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,159 psi | 88% | 2864 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 55,143 psi | 86% | 2884 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 82% | 55,187 psi | 86% | 2844 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,332 psi | 87% | 2877 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 54,882 psi | 86% | 2959 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 55,376 psi | 87% | 2949 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 56,347 psi | 88% | 3015 fps | 99.1% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,334 psi | 90% | 3077 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,187 psi | 86% | 2789 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,144 psi | 88% | 2992 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,624 psi | 90% | 2900 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% | 39,711 psi | 62% | 2579 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 52,576 psi | 82% | 2812 fps | 100% |
| Accurate MAGPRO | 67.4 gr | 82% | 41,423 psi | 65% | 2703 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 43,569 psi | 68% | 2703 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 38,943 psi | 61% | 2641 fps | 96.7% |
| ADI AR 2217 | <<locked>> | 86% | 35,520 psi | 56% | 2559 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 98% | 45,905 psi | 72% | 2871 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 82% | 28,384 psi | 44% | 2408 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,111 psi | 79% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,685 psi | 68% | 2700 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,494 psi | 62% | 2648 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,305 psi | 60% | 2598 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,040 psi | 52% | 2530 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,772 psi | 67% | 2759 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 46,456 psi | 73% | 2867 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 43,569 psi | 68% | 2677 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 36,840 psi | 58% | 2585 fps | 97.2% |
| Bofors RP30 | <<locked>> | 84% | 35,172 psi | 55% | 2575 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 39,494 psi | 62% | 2648 fps | 98.1% |
| Bofors RP7 | <<locked>> | 80% | 53,954 psi | 85% | 2808 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 34,040 psi | 53% | 2523 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 51,532 psi | 81% | 2805 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 36,753 psi | 58% | 2536 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,785 psi | 64% | 2628 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,181 psi | 74% | 2690 fps | 100% |
| Hodgdon Retumbo | 62.2 gr | 80% | 32,314 psi | 51% | 2559 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,079 psi | 44% | 1617 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,284 psi | 77% | 2746 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 45,063 psi | 71% | 2677 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,902 psi | 67% | 2638 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 80% | 40,059 psi | 63% | 2677 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 90% | 33,518 psi | 53% | 2556 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 52,881 psi | 83% | 2779 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,387 psi | 81% | 2779 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,214 psi | 54% | 2457 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 49,937 psi | 78% | 2799 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 29,414 psi | 46% | 2461 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 41,814 psi | 66% | 2723 fps | 99.5% |
| Norma URP | <<locked>> | 80% | 51,053 psi | 80% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,105 psi | 66% | 2733 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 80% | 49,937 psi | 78% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,854 psi | 58% | 2589 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,790 psi | 45% | 1657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,446 psi | 82% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,865 psi | 80% | 2858 fps | 100% |
| ReloadSwiss RS 76 | 66.6 gr | 80% | 31,372 psi | 49% | 2533 fps | 97.2% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 38,000 psi | 60% | 2677 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 44,730 psi | 70% | 2680 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 80% | 43,134 psi | 68% | 2687 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 80% | 53,954 psi | 85% | 2808 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,881 psi | 83% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,387 psi | 81% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,764 psi | 81% | 2730 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,786 psi | 67% | 2684 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 45,484 psi | 71% | 2671 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 48,457 psi | 76% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,526 psi | 68% | 2664 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 52,518 psi | 82% | 2785 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,014 psi | 60% | 2543 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 94% | 51,358 psi | 80% | 2822 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 51,706 psi | 81% | 2789 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,844 psi | 67% | 2674 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,698 psi | 65% | 2713 fps | 97% |
| Vihtavuori N565 | <<locked>> | 82% | 36,825 psi | 58% | 2589 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 39,508 psi | 62% | 2697 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 94% | 46,093 psi | 72% | 2874 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,692 psi | 81% | 2740 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,433 psi | 56% | 2648 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,511 psi | 68% | 2664 fps | 98.8% |
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 69 powders for 7 x 66 SE v. Hofe loaded with the .284 | 170gr | Norma VULKAN. Vihtavuori N570 delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,077 fps. ADI AR 2217 gives the best case fill at 100 %, and 69 of the 69 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 170.0 gr projectile in 0.284" calls for a 1:12.0 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, Accurate MAGPRO rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 170gr | Norma VULKAN 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.