Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 166gr | Peregrine VRG-2 bullet and 75 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>> | 92% | 55,883 psi | 88% | 2890 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,043 psi | 89% | 2917 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,041 psi | 85% | 2992 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 90% | 54,795 psi | 86% | 2995 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 88% | 54,418 psi | 85% | 2930 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 56,072 psi | 88% | 2999 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,911 psi | 84% | 2959 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,428 psi | 76% | 2923 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,462 psi | 85% | 2923 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,621 psi | 86% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,609 psi | 90% | 2976 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,202 psi | 88% | 2989 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,682 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,334 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,157 psi | 85% | 2986 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,720 psi | 79% | 2979 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,246 psi | 90% | 2959 fps | 98% |
| Bofors RP15 | <<locked>> | 94% | 55,376 psi | 87% | 2976 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3035 fps | 99.9% |
| Bofors RP5 | <<locked>> | 92% | 56,202 psi | 88% | 2989 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 55,259 psi | 87% | 2864 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,753 psi | 87% | 2989 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 54,984 psi | 86% | 2920 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,305 psi | 90% | 2930 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,695 psi | 87% | 2930 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,462 psi | 85% | 2913 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,824 psi | 86% | 2841 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,159 psi | 88% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,535 psi | 87% | 2959 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,362 psi | 59% | 1831 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,072 psi | 89% | 2907 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,710 psi | 89% | 2887 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,406 psi | 90% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,434 psi | 88% | 2910 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 92% | 54,027 psi | 85% | 2976 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,816 psi | 69% | 2828 fps | 98.2% |
| Lovex S065 | <<locked>> | 84% | 57,450 psi | 90% | 2884 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,738 psi | 87% | 2881 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,174 psi | 90% | 2907 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,665 psi | 86% | 2910 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 44,179 psi | 69% | 2854 fps | 99.7% |
| Norma MRP | <<locked>> | 90% | 56,173 psi | 88% | 3009 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,448 psi | 87% | 2897 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,984 psi | 86% | 2999 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 54,389 psi | 85% | 2910 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,522 psi | 90% | 2989 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,218 psi | 60% | 1873 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,319 psi | 90% | 2940 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,825 psi | 87% | 2972 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,985 psi | 89% | 3097 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,318 psi | 88% | 3061 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 88% | 55,317 psi | 87% | 2897 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 90% | 57,232 psi | 90% | 2966 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 55,259 psi | 87% | 2864 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,450 psi | 90% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,738 psi | 87% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,420 psi | 88% | 2835 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,811 psi | 89% | 2959 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 56,608 psi | 89% | 2890 fps | 99.2% |
| Somchem S365 | <<locked>> | 86% | 56,159 psi | 88% | 2897 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,377 psi | 90% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,595 psi | 90% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,159 psi | 90% | 2890 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,101 psi | 89% | 2913 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 55,956 psi | 88% | 2927 fps | 96% |
| Vihtavuori N550 | <<locked>> | 84% | 56,289 psi | 88% | 2894 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,840 psi | 88% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,869 psi | 88% | 3009 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 96% | 55,912 psi | 88% | 2992 fps | 99.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,971 psi | 89% | 3061 fps | 99% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 3054 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,681 psi | 89% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,984 psi | 86% | 2920 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,492 psi | 89% | 3038 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,450 psi | 90% | 2930 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% | 37,014 psi | 58% | 2556 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 49,603 psi | 78% | 2802 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,640 psi | 64% | 2736 fps | 97.1% |
| Accurate MAGPRO | 66.9 gr | 82% | 41,133 psi | 64% | 2736 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 41,466 psi | 65% | 2694 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 36,927 psi | 58% | 2625 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 88% | 35,752 psi | 56% | 2595 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 84% | 28,195 psi | 44% | 2431 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,785 psi | 65% | 2694 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,776 psi | 75% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,408 psi | 65% | 2687 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,246 psi | 58% | 2631 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,969 psi | 56% | 2585 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,995 psi | 49% | 2507 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,842 psi | 62% | 2736 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,905 psi | 74% | 2907 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,311 psi | 74% | 2782 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 34,534 psi | 54% | 2562 fps | 96% |
| Bofors RP30 | <<locked>> | 86% | 34,983 psi | 55% | 2605 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 37,246 psi | 58% | 2631 fps | 97.2% |
| Bofors RP7 | <<locked>> | 80% | 51,851 psi | 81% | 2808 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,011 psi | 53% | 2552 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 51,329 psi | 80% | 2861 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,824 psi | 84% | 2877 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 39,436 psi | 62% | 2628 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,754 psi | 61% | 2615 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,889 psi | 70% | 2690 fps | 100% |
| Hodgdon Retumbo | 63.3 gr | 82% | 32,387 psi | 51% | 2592 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 51,547 psi | 81% | 2894 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 44% | 1634 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,282 psi | 74% | 2746 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,316 psi | 84% | 2831 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,094 psi | 74% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,017 psi | 64% | 2631 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 35,592 psi | 56% | 2602 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,621 psi | 56% | 2644 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 50,705 psi | 79% | 2779 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,936 psi | 77% | 2772 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 31,821 psi | 50% | 2434 fps | 97.7% |
| Norma 204 | <<locked>> | 80% | 47,572 psi | 75% | 2792 fps | 99.1% |
| Norma 217 | <<locked>> | 90% | 31,024 psi | 49% | 2543 fps | 96% |
| Norma MRP | <<locked>> | 80% | 39,218 psi | 61% | 2700 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 48,501 psi | 76% | 2789 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,070 psi | 55% | 2602 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 47,442 psi | 74% | 2795 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,198 psi | 49% | 2480 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1673 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,719 psi | 78% | 2828 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,182 psi | 76% | 2851 fps | 100% |
| ReloadSwiss RS 76 | 66.1 gr | 80% | 29,182 psi | 46% | 2490 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 38,043 psi | 60% | 2713 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 42,554 psi | 67% | 2667 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 40,712 psi | 64% | 2671 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,851 psi | 81% | 2808 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,705 psi | 79% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,936 psi | 77% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,472 psi | 78% | 2730 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,379 psi | 63% | 2667 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 43,294 psi | 68% | 2657 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 45,905 psi | 72% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,263 psi | 65% | 2651 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 80% | 53,795 psi | 84% | 2766 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,024 psi | 78% | 2782 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,781 psi | 56% | 2526 fps | 97.2% |
| Vihtavuori N170 | <<locked>> | 96% | 52,214 psi | 82% | 2867 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 49,211 psi | 77% | 2785 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,103 psi | 63% | 2661 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,247 psi | 62% | 2690 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 84% | 36,796 psi | 58% | 2621 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 92% | 42,641 psi | 67% | 2799 fps | 96% |
| Vihtavuori N570 | <<locked>> | 96% | 46,543 psi | 73% | 2917 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,327 psi | 77% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,561 psi | 81% | 2864 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,532 psi | 51% | 2618 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,739 psi | 59% | 2579 fps | 97.2% |
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 | 166gr | Peregrine VRG-2. Hodgdon Retumbo delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,104 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 166.0 gr projectile in 0.284" calls for a 1:11.0 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, Accurate MAGPRO rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 166gr | Peregrine VRG-2 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.