Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 158gr | Sellier & Bellot XRG bullet and 72 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>> | 92% | 54,375 psi | 85% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,622 psi | 87% | 2956 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,811 psi | 89% | 3084 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 90% | 56,188 psi | 88% | 3015 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 54,143 psi | 85% | 3022 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2986 fps | 99.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,630 psi | 73% | 2943 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,463 psi | 88% | 3012 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,536 psi | 89% | 3012 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,638 psi | 90% | 3022 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,782 psi | 87% | 3005 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,375 psi | 85% | 3022 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,709 psi | 87% | 2989 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,216 psi | 87% | 3054 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,101 psi | 88% | 3077 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,593 psi | 87% | 2982 fps | 97% |
| Bofors RP15 | <<locked>> | 96% | 57,145 psi | 90% | 3061 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,882 psi | 86% | 3058 fps | 99.5% |
| Bofors RP5 | <<locked>> | 92% | 54,375 psi | 85% | 3022 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 57,493 psi | 90% | 2953 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3071 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 57,014 psi | 89% | 3009 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,825 psi | 87% | 2966 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 57,638 psi | 90% | 3018 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,608 psi | 89% | 2999 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,666 psi | 89% | 2927 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,085 psi | 85% | 3133 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 53,693 psi | 84% | 2986 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 58% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,666 psi | 87% | 2940 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,317 psi | 87% | 2920 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,695 psi | 87% | 2943 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,839 psi | 86% | 2940 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 94% | 55,753 psi | 87% | 3058 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,090 psi | 66% | 2844 fps | 97.2% |
| Lovex S065 | <<locked>> | 84% | 56,188 psi | 88% | 2920 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,462 psi | 85% | 2917 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,622 psi | 87% | 2943 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,724 psi | 89% | 2999 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 42,351 psi | 66% | 2874 fps | 99.1% |
| Norma MRP | <<locked>> | 90% | 54,215 psi | 85% | 3041 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,566 psi | 90% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,710 psi | 89% | 3084 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 86% | 56,376 psi | 88% | 2999 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,158 psi | 86% | 3015 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,058 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,535 psi | 87% | 2976 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 53,824 psi | 84% | 3005 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,607 psi | 86% | 3123 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 3077 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 90% | 57,232 psi | 90% | 2982 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 55,434 psi | 87% | 2995 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 57,493 psi | 90% | 2953 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,188 psi | 88% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,462 psi | 85% | 2917 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,230 psi | 87% | 2871 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,013 psi | 86% | 2989 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 55,129 psi | 86% | 2917 fps | 98.7% |
| Somchem S365 | <<locked>> | 86% | 54,520 psi | 85% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,782 psi | 87% | 2963 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,246 psi | 88% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,680 psi | 87% | 2927 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,405 psi | 87% | 2943 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 54,679 psi | 86% | 2930 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,404 psi | 85% | 2963 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,638 psi | 90% | 3097 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 96% | 53,940 psi | 85% | 3018 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,679 psi | 86% | 3081 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,998 psi | 86% | 2881 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,276 psi | 90% | 3012 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 53,940 psi | 85% | 3074 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,724 psi | 87% | 2959 fps | 99.7% |
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% | 36,303 psi | 57% | 2589 fps | 98.5% |
| Accurate 4350 | <<locked>> | 80% | 48,428 psi | 76% | 2841 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 42,946 psi | 67% | 2828 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 40,321 psi | 63% | 2720 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 38,479 psi | 60% | 2707 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 90% | 37,333 psi | 59% | 2677 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 88% | 31,430 psi | 49% | 2575 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,698 psi | 64% | 2720 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,238 psi | 72% | 2844 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,708 psi | 84% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,321 psi | 63% | 2713 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,230 psi | 57% | 2657 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,911 psi | 55% | 2618 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,327 psi | 48% | 2530 fps | 97.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,566 psi | 60% | 2769 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,124 psi | 77% | 2864 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 33,765 psi | 53% | 2592 fps | 95% |
| Bofors RP30 | <<locked>> | 88% | 36,419 psi | 57% | 2690 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 36,230 psi | 57% | 2657 fps | 96.2% |
| Bofors RP7 | <<locked>> | 80% | 50,676 psi | 79% | 2841 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 35,563 psi | 56% | 2635 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 49,951 psi | 78% | 2894 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 52,431 psi | 82% | 2907 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 41,075 psi | 64% | 2713 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,364 psi | 63% | 2697 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,627 psi | 68% | 2723 fps | 100% |
| Hodgdon Retumbo | 64 gr | 84% | 33,779 psi | 53% | 2674 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 49,835 psi | 78% | 2923 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 44% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,093 psi | 72% | 2776 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,011 psi | 82% | 2867 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 45,919 psi | 72% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,059 psi | 63% | 2654 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 39,639 psi | 62% | 2749 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 96% | 36,956 psi | 58% | 2726 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 49,603 psi | 78% | 2815 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,037 psi | 75% | 2808 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 31,270 psi | 49% | 2464 fps | 96.9% |
| Norma 204 | <<locked>> | 80% | 46,296 psi | 73% | 2818 fps | 98.5% |
| Norma 217 | <<locked>> | 92% | 32,416 psi | 51% | 2628 fps | 96% |
| Norma MRP | <<locked>> | 80% | 38,072 psi | 60% | 2730 fps | 98.1% |
| Norma URP | <<locked>> | 80% | 47,413 psi | 74% | 2828 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 36,709 psi | 58% | 2690 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 46,180 psi | 72% | 2828 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 32,793 psi | 51% | 2569 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 45% | 1706 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,356 psi | 76% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,630 psi | 73% | 2884 fps | 100% |
| ReloadSwiss RS 76 | 66.9 gr | 82% | 30,705 psi | 48% | 2579 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,786 psi | 67% | 2871 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 41,655 psi | 65% | 2697 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 80% | 39,813 psi | 62% | 2703 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 80% | 50,676 psi | 79% | 2841 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,603 psi | 78% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,037 psi | 75% | 2808 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,617 psi | 76% | 2766 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,479 psi | 62% | 2697 fps | 97.2% |
| Somchem S361 | <<locked>> | 80% | 42,366 psi | 66% | 2687 fps | 96% |
| Somchem S365 | <<locked>> | 80% | 44,556 psi | 70% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,321 psi | 63% | 2684 fps | 98.2% |
| Vihtavuori N150 | <<locked>> | 80% | 52,750 psi | 83% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,718 psi | 76% | 2818 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,911 psi | 55% | 2552 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,008 psi | 75% | 2822 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,102 psi | 61% | 2694 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 40,770 psi | 64% | 2779 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 86% | 38,377 psi | 60% | 2710 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 94% | 44,048 psi | 69% | 2881 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,834 psi | 75% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,169 psi | 79% | 2897 fps | 99.9% |
| Winchester StaBALL HD | 62.6 gr | 80% | 31,154 psi | 49% | 2648 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,825 psi | 58% | 2605 fps | 96.3% |
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 72 powders for 7 x 66 SE v. Hofe loaded with the .284 | 158gr | Sellier & Bellot XRG. Hodgdon Retumbo delivers the highest muzzle velocity at 3,133 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,133 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 158.0 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 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, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 158gr | Sellier & Bellot XRG 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.