Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 160gr | Nosler Partition Gold 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% | 55,811 psi | 87% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,913 psi | 89% | 2959 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 57,493 psi | 90% | 3091 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 90% | 54,375 psi | 85% | 3031 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 90% | 57,580 psi | 90% | 3022 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 55,521 psi | 87% | 3031 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,403 psi | 84% | 2995 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,051 psi | 75% | 2959 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,085 psi | 85% | 2959 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,085 psi | 85% | 2959 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,157 psi | 85% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,145 psi | 90% | 3012 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,767 psi | 87% | 3028 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,203 psi | 90% | 2989 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,681 psi | 89% | 3058 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,711 psi | 90% | 3084 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,797 psi | 89% | 2989 fps | 97.5% |
| Bofors RP15 | <<locked>> | 94% | 54,737 psi | 86% | 3012 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,289 psi | 88% | 3064 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 55,767 psi | 87% | 3028 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,056 psi | 86% | 2900 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,955 psi | 86% | 3022 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 54,694 psi | 86% | 2959 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,956 psi | 89% | 2969 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,259 psi | 87% | 2966 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,085 psi | 85% | 2946 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,273 psi | 85% | 2877 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,521 psi | 87% | 3140 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,071 psi | 86% | 2995 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,405 psi | 59% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,710 psi | 89% | 2943 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,405 psi | 88% | 2923 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,130 psi | 90% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,028 psi | 88% | 2946 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 94% | 57,217 psi | 90% | 3068 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,540 psi | 68% | 2861 fps | 97.8% |
| Lovex S065 | <<locked>> | 84% | 57,261 psi | 90% | 2923 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,564 psi | 87% | 2923 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,014 psi | 89% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,273 psi | 85% | 2946 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 43,874 psi | 69% | 2887 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 55,695 psi | 87% | 3048 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,201 psi | 87% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,346 psi | 85% | 3031 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 57,508 psi | 90% | 2999 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,884 psi | 89% | 3022 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,290 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,768 psi | 89% | 2979 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,347 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,275 psi | 88% | 3133 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,448 psi | 87% | 3091 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 88% | 54,955 psi | 86% | 2933 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 56,579 psi | 89% | 2999 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 55,056 psi | 86% | 2900 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,261 psi | 90% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,564 psi | 87% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,275 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,159 psi | 88% | 2995 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,304 psi | 88% | 2923 fps | 99% |
| Somchem S365 | <<locked>> | 86% | 55,811 psi | 87% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,101 psi | 89% | 2969 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,145 psi | 90% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,855 psi | 89% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,724 psi | 89% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,028 psi | 88% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,637 psi | 87% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,405 psi | 87% | 3048 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 96% | 55,564 psi | 87% | 3028 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,347 psi | 88% | 3094 fps | 98.6% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,287 psi | 84% | 3084 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,275 psi | 88% | 2881 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,694 psi | 86% | 2959 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,782 psi | 87% | 3081 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,058 psi | 89% | 2966 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% | 37,318 psi | 58% | 2598 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 49,647 psi | 78% | 2844 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,567 psi | 64% | 2772 fps | 96.6% |
| Accurate MAGPRO | <<locked>> | 82% | 41,060 psi | 64% | 2772 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 41,321 psi | 65% | 2726 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 36,898 psi | 58% | 2657 fps | 95% |
| ADI AR 2217 | <<locked>> | 90% | 38,159 psi | 60% | 2687 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 86% | 30,356 psi | 48% | 2530 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,684 psi | 65% | 2726 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,684 psi | 65% | 2726 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,471 psi | 74% | 2851 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,307 psi | 65% | 2720 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,246 psi | 58% | 2667 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,969 psi | 56% | 2625 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,140 psi | 49% | 2543 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,755 psi | 62% | 2779 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,079 psi | 74% | 2812 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 34,563 psi | 54% | 2602 fps | 95.6% |
| Bofors RP30 | <<locked>> | 86% | 35,027 psi | 55% | 2644 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 37,246 psi | 58% | 2667 fps | 96.8% |
| Bofors RP7 | <<locked>> | 80% | 51,764 psi | 81% | 2848 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 36,390 psi | 57% | 2648 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 51,111 psi | 80% | 2900 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,519 psi | 84% | 2913 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 39,378 psi | 62% | 2664 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,696 psi | 61% | 2648 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,759 psi | 70% | 2730 fps | 100% |
| Hodgdon Retumbo | 63.3 gr | 82% | 32,489 psi | 51% | 2625 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 51,169 psi | 80% | 2930 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,007 psi | 44% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,094 psi | 74% | 2782 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,040 psi | 83% | 2871 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,036 psi | 74% | 2789 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,959 psi | 64% | 2664 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 38,043 psi | 60% | 2697 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,650 psi | 56% | 2677 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 50,647 psi | 79% | 2818 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,907 psi | 77% | 2812 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,227 psi | 51% | 2477 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 47,355 psi | 74% | 2825 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 31,183 psi | 49% | 2582 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 39,160 psi | 61% | 2740 fps | 98.5% |
| Norma URP | <<locked>> | 80% | 48,356 psi | 76% | 2831 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,710 psi | 59% | 2703 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 47,268 psi | 74% | 2831 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 31,357 psi | 49% | 2516 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,689 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,574 psi | 78% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,834 psi | 75% | 2890 fps | 100% |
| ReloadSwiss RS 76 | 67.7 gr | 82% | 31,488 psi | 49% | 2595 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,988 psi | 64% | 2818 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 42,453 psi | 67% | 2703 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 40,669 psi | 64% | 2707 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 51,764 psi | 81% | 2848 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,647 psi | 79% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,907 psi | 77% | 2812 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,414 psi | 77% | 2766 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,335 psi | 63% | 2703 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 43,236 psi | 68% | 2694 fps | 96.5% |
| Somchem S365 | <<locked>> | 80% | 45,774 psi | 72% | 2785 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,336 psi | 65% | 2690 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 80% | 53,664 psi | 84% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,835 psi | 78% | 2825 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,824 psi | 56% | 2562 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 49,110 psi | 77% | 2828 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,205 psi | 63% | 2703 fps | 100% |
| Vihtavuori N560 | 64.1 gr | 80% | 39,175 psi | 61% | 2730 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 86% | 39,552 psi | 62% | 2723 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 92% | 42,409 psi | 66% | 2831 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 98% | 49,603 psi | 78% | 3015 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,066 psi | 77% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,314 psi | 80% | 2904 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,416 psi | 51% | 2661 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,768 psi | 59% | 2615 fps | 96.8% |
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 74 powders for 7 x 66 SE v. Hofe loaded with the .284 | 160gr | Nosler Partition Gold. Hodgdon Retumbo delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,140 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 160.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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 .284 | 160gr | Nosler Partition Gold 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.