Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 162gr | RWS Kegelspitz 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 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% | 54,085 psi | 85% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,085 psi | 86% | 2920 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,666 psi | 89% | 3058 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 55,796 psi | 87% | 2982 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 57,609 psi | 90% | 3054 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3018 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,024 psi | 78% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,028 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,448 psi | 87% | 2972 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,114 psi | 85% | 2989 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,579 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 55,187 psi | 86% | 3022 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 56,289 psi | 88% | 3048 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 3041 fps | 97% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,839 psi | 86% | 2953 fps | 97.4% |
| Bofors RP15 | <<locked>> | 94% | 57,000 psi | 89% | 3031 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 55,027 psi | 86% | 3031 fps | 99.7% |
| Bofors RP5 | <<locked>> | 90% | 54,114 psi | 85% | 2989 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 56,623 psi | 89% | 2917 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,363 psi | 90% | 3045 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 56,318 psi | 88% | 2972 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 57,188 psi | 90% | 2986 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,014 psi | 88% | 2969 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,246 psi | 88% | 2894 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 54,302 psi | 85% | 3107 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 57,159 psi | 90% | 3012 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,478 psi | 59% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,071 psi | 86% | 2907 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,361 psi | 87% | 2910 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 54,288 psi | 85% | 2907 fps | 99% |
| IMR 7828 SSC | <<locked>> | 92% | 55,608 psi | 87% | 3031 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,629 psi | 72% | 2890 fps | 98.5% |
| Lovex S065 | <<locked>> | 82% | 55,216 psi | 87% | 2881 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,130 psi | 90% | 2936 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 55,738 psi | 87% | 2917 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,086 psi | 88% | 2966 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 46,122 psi | 72% | 2913 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 54,070 psi | 85% | 3009 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,884 psi | 89% | 2949 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,608 psi | 89% | 3054 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 55,883 psi | 88% | 2963 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 55,114 psi | 86% | 2986 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 1903 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,998 psi | 86% | 2940 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,305 psi | 90% | 3025 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,839 psi | 86% | 3097 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 54,186 psi | 85% | 3054 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 88% | 56,681 psi | 89% | 2949 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 54,926 psi | 86% | 2959 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 56,623 psi | 89% | 2917 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,216 psi | 87% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,130 psi | 90% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,317 psi | 85% | 2835 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,520 psi | 85% | 2956 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 54,476 psi | 85% | 2887 fps | 98.9% |
| Somchem S365 | <<locked>> | 84% | 54,360 psi | 85% | 2904 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,376 psi | 87% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,013 psi | 86% | 2890 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,085 psi | 86% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 54,273 psi | 85% | 2897 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 54,157 psi | 85% | 2930 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,464 psi | 90% | 3068 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 54,070 psi | 85% | 2992 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 98% | 54,940 psi | 86% | 3058 fps | 98.6% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,782 psi | 87% | 3114 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,317 psi | 85% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,565 psi | 89% | 2976 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 54,491 psi | 85% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,347 psi | 87% | 2930 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% | 38,769 psi | 61% | 2618 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 51,430 psi | 81% | 2861 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 39,726 psi | 62% | 2730 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 42,641 psi | 67% | 2743 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 38,247 psi | 60% | 2680 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 88% | 37,086 psi | 58% | 2651 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 29,559 psi | 46% | 2493 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,037 psi | 77% | 2864 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,772 psi | 67% | 2743 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,711 psi | 61% | 2690 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,391 psi | 59% | 2641 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,242 psi | 51% | 2562 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,655 psi | 65% | 2799 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,878 psi | 77% | 2972 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 45,629 psi | 72% | 2776 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 35,969 psi | 56% | 2621 fps | 96.4% |
| Bofors RP30 | <<locked>> | 84% | 34,127 psi | 53% | 2608 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 38,711 psi | 61% | 2690 fps | 97.4% |
| Bofors RP7 | <<locked>> | 80% | 53,055 psi | 83% | 2861 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 35,404 psi | 55% | 2612 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 52,765 psi | 83% | 2917 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 40,741 psi | 64% | 2684 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,059 psi | 63% | 2667 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,238 psi | 72% | 2740 fps | 100% |
| Hodgdon Retumbo | 63.2 gr | 80% | 31,517 psi | 49% | 2585 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 53,011 psi | 83% | 2949 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 44% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,370 psi | 76% | 2795 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 48,675 psi | 76% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,090 psi | 66% | 2680 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 80% | 36,956 psi | 58% | 2661 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 92% | 34,780 psi | 55% | 2644 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 51,996 psi | 81% | 2828 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,444 psi | 79% | 2828 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,460 psi | 52% | 2497 fps | 98.1% |
| Norma 204 | <<locked>> | 80% | 48,863 psi | 77% | 2841 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 30,574 psi | 48% | 2549 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 40,683 psi | 64% | 2759 fps | 99% |
| Norma URP | <<locked>> | 80% | 50,038 psi | 78% | 2844 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,593 psi | 57% | 2664 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 48,820 psi | 77% | 2848 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,735 psi | 51% | 2543 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,776 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,445 psi | 81% | 2884 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,719 psi | 78% | 2910 fps | 100% |
| ReloadSwiss RS 76 | 67.7 gr | 80% | 30,632 psi | 48% | 2559 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 39,813 psi | 62% | 2779 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 43,874 psi | 69% | 2723 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 80% | 42,192 psi | 66% | 2730 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 80% | 53,055 psi | 83% | 2861 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,996 psi | 81% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,444 psi | 79% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,879 psi | 80% | 2779 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,843 psi | 66% | 2723 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 44,686 psi | 70% | 2713 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 47,340 psi | 74% | 2799 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,772 psi | 67% | 2710 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 51,488 psi | 81% | 2838 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,173 psi | 58% | 2582 fps | 97.5% |
| Vihtavuori N550 | <<locked>> | 80% | 50,647 psi | 79% | 2838 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,684 psi | 65% | 2717 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,625 psi | 64% | 2749 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 84% | 38,479 psi | 60% | 2687 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 41,249 psi | 65% | 2795 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 96% | 48,269 psi | 76% | 2976 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,720 psi | 79% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,968 psi | 83% | 2917 fps | 100% |
| Winchester StaBALL HD | 64.9 gr | 80% | 34,214 psi | 54% | 2684 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,102 psi | 61% | 2635 fps | 97.5% |
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 75 powders for 7 x 66 SE v. Hofe loaded with the .284 | 162gr | RWS Kegelspitz. Vihtavuori N570 delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,114 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 162.0 gr projectile in 0.284" calls for a 1:13.5 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 | 162gr | RWS Kegelspitz they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.