Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 160gr | Prvi Partizan PSP BT bullet and 73 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% | 56,927 psi | 89% | 2959 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,621 psi | 86% | 3035 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 90% | 57,609 psi | 90% | 3025 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 55,535 psi | 87% | 3035 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,650 psi | 84% | 2999 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,066 psi | 75% | 2959 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,317 psi | 85% | 2966 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,215 psi | 85% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,203 psi | 90% | 3012 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,811 psi | 87% | 3028 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,261 psi | 90% | 2992 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,927 psi | 89% | 3061 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 53,737 psi | 84% | 3025 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,183 psi | 79% | 3009 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,797 psi | 89% | 2992 fps | 97.5% |
| Bofors RP15 | <<locked>> | 94% | 55,013 psi | 86% | 3015 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3071 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 55,811 psi | 87% | 3028 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,100 psi | 86% | 2904 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,172 psi | 86% | 3022 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 54,679 psi | 86% | 2959 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,985 psi | 89% | 2969 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,245 psi | 87% | 2969 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,317 psi | 85% | 2949 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,549 psi | 85% | 2881 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,796 psi | 87% | 3146 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,114 psi | 86% | 2995 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,318 psi | 58% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,971 psi | 89% | 2946 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,405 psi | 88% | 2923 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,174 psi | 90% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,057 psi | 88% | 2946 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 94% | 57,508 psi | 90% | 3074 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,569 psi | 68% | 2861 fps | 97.8% |
| Lovex S065 | <<locked>> | 84% | 57,290 psi | 90% | 2923 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,608 psi | 87% | 2923 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,305 psi | 90% | 2953 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,317 psi | 85% | 2946 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 43,918 psi | 69% | 2890 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 55,753 psi | 87% | 3048 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,230 psi | 87% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,389 psi | 85% | 3031 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 54,070 psi | 85% | 2946 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,884 psi | 89% | 3022 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,189 psi | 60% | 1903 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,043 psi | 89% | 2986 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,347 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,536 psi | 89% | 3140 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,651 psi | 87% | 3094 fps | 99% |
| Rottweil R 904 | <<locked>> | 88% | 54,984 psi | 86% | 2936 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 56,884 psi | 89% | 3002 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 55,100 psi | 86% | 2904 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,290 psi | 90% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,608 psi | 87% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,289 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,449 psi | 88% | 2999 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,521 psi | 89% | 2927 fps | 99% |
| Somchem S365 | <<locked>> | 86% | 56,101 psi | 88% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,377 psi | 90% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,406 psi | 90% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,869 psi | 89% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,971 psi | 89% | 2956 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,043 psi | 88% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,898 psi | 88% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,419 psi | 87% | 3045 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 96% | 55,593 psi | 87% | 3031 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3097 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,287 psi | 84% | 3084 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,289 psi | 88% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,940 psi | 86% | 2963 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,782 psi | 87% | 3081 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,276 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% | 37,347 psi | 59% | 2598 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 49,705 psi | 78% | 2848 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 41,075 psi | 64% | 2772 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 41,365 psi | 65% | 2730 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 36,927 psi | 58% | 2657 fps | 95% |
| ADI AR 2217 | <<locked>> | 90% | 38,363 psi | 60% | 2694 fps | 96% |
| ADI AR 2225 | <<locked>> | 86% | 30,400 psi | 48% | 2530 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,742 psi | 65% | 2730 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,529 psi | 74% | 2851 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,350 psi | 65% | 2723 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,304 psi | 58% | 2671 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,042 psi | 56% | 2628 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,169 psi | 49% | 2543 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,784 psi | 62% | 2776 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,746 psi | 73% | 2943 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,079 psi | 74% | 2812 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 34,780 psi | 55% | 2605 fps | 95.7% |
| Bofors RP30 | <<locked>> | 86% | 35,056 psi | 55% | 2644 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 37,304 psi | 58% | 2671 fps | 96.8% |
| Bofors RP7 | <<locked>> | 80% | 51,764 psi | 81% | 2851 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 36,564 psi | 57% | 2651 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 51,155 psi | 80% | 2900 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,577 psi | 84% | 2913 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 39,407 psi | 62% | 2664 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,711 psi | 61% | 2651 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,831 psi | 70% | 2730 fps | 100% |
| Hodgdon Retumbo | 63.4 gr | 82% | 32,518 psi | 51% | 2625 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 51,198 psi | 80% | 2933 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,949 psi | 44% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,152 psi | 74% | 2782 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,055 psi | 83% | 2871 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,094 psi | 74% | 2792 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,988 psi | 64% | 2667 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 38,087 psi | 60% | 2697 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,665 psi | 56% | 2680 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 50,676 psi | 79% | 2818 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,139 psi | 77% | 2818 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,256 psi | 51% | 2477 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 47,355 psi | 74% | 2828 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 31,357 psi | 49% | 2585 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 39,175 psi | 61% | 2740 fps | 98.5% |
| Norma URP | <<locked>> | 80% | 48,617 psi | 76% | 2835 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,913 psi | 59% | 2707 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 47,297 psi | 74% | 2831 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 31,372 psi | 49% | 2516 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,616 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,821 psi | 78% | 2874 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,863 psi | 75% | 2890 fps | 100% |
| ReloadSwiss RS 76 | 66.2 gr | 80% | 29,428 psi | 46% | 2526 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,944 psi | 64% | 2815 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 42,496 psi | 67% | 2703 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 40,901 psi | 64% | 2713 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 80% | 51,764 psi | 81% | 2851 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,676 psi | 79% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,139 psi | 77% | 2818 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,647 psi | 78% | 2772 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,567 psi | 64% | 2707 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 43,265 psi | 68% | 2694 fps | 96.5% |
| Somchem S365 | <<locked>> | 80% | 45,832 psi | 72% | 2789 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,365 psi | 65% | 2690 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 80% | 53,925 psi | 85% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,893 psi | 78% | 2825 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,868 psi | 56% | 2562 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 80% | 49,342 psi | 77% | 2831 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,248 psi | 63% | 2703 fps | 100% |
| Vihtavuori N560 | 64.2 gr | 80% | 39,204 psi | 61% | 2730 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 84% | 37,115 psi | 58% | 2664 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 42,438 psi | 67% | 2835 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 98% | 49,617 psi | 78% | 3015 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,081 psi | 77% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,343 psi | 80% | 2904 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,445 psi | 51% | 2661 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,797 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 73 powders for 7 x 66 SE v. Hofe loaded with the .284 | 160gr | Prvi Partizan PSP BT. 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 73 of the 73 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 0.284" calls for a 1:11.5 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 .284 | 160gr | Prvi Partizan PSP BT 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.