Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 170gr | Rhino Solid Shank 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>> | 90% | 54,172 psi | 85% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,940 psi | 86% | 2844 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,608 psi | 89% | 2986 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 88% | 55,738 psi | 87% | 2910 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 57,377 psi | 90% | 2979 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,448 psi | 87% | 2946 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,806 psi | 78% | 2910 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,796 psi | 87% | 2907 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,796 psi | 87% | 2907 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,086 psi | 88% | 2900 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,158 psi | 86% | 2897 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,638 psi | 90% | 2972 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,651 psi | 87% | 2884 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 55,129 psi | 86% | 2949 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,883 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 2976 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,868 psi | 86% | 2884 fps | 97.7% |
| Bofors RP15 | <<locked>> | 94% | 56,797 psi | 89% | 2959 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 54,824 psi | 86% | 2959 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 57,638 psi | 90% | 2972 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 56,608 psi | 89% | 2844 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,000 psi | 89% | 2969 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 56,289 psi | 88% | 2897 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,898 psi | 89% | 2913 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,927 psi | 88% | 2897 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,159 psi | 88% | 2818 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 54,041 psi | 85% | 3031 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 57,072 psi | 89% | 2940 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,420 psi | 59% | 1801 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,998 psi | 86% | 2835 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,274 psi | 87% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,667 psi | 90% | 2894 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 92% | 55,622 psi | 87% | 2963 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,469 psi | 71% | 2822 fps | 98.7% |
| Lovex S065 | <<locked>> | 82% | 55,405 psi | 87% | 2812 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,043 psi | 89% | 2861 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 55,593 psi | 87% | 2844 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,970 psi | 88% | 2890 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 45,992 psi | 72% | 2848 fps | 99.9% |
| Norma MRP | <<locked>> | 90% | 57,725 psi | 90% | 2992 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,797 psi | 89% | 2877 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,565 psi | 89% | 2982 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 55,753 psi | 87% | 2887 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,766 psi | 86% | 2910 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,334 psi | 60% | 1847 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,056 psi | 86% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,392 psi | 90% | 2953 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,520 psi | 85% | 3022 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,780 psi | 84% | 2982 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 56,579 psi | 89% | 2877 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 54,853 psi | 86% | 2890 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 56,608 psi | 89% | 2844 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,405 psi | 87% | 2812 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,043 psi | 89% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,172 psi | 85% | 2762 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,433 psi | 85% | 2884 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 54,404 psi | 85% | 2818 fps | 99.1% |
| Somchem S365 | <<locked>> | 84% | 54,273 psi | 85% | 2831 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,405 psi | 87% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,853 psi | 86% | 2818 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,100 psi | 86% | 2844 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 57,392 psi | 90% | 2913 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 84% | 57,667 psi | 90% | 2874 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,595 psi | 90% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,305 psi | 90% | 2995 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 96% | 57,667 psi | 90% | 2979 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 54,824 psi | 86% | 2986 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,550 psi | 87% | 3041 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,085 psi | 85% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,521 psi | 89% | 2904 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 54,114 psi | 85% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,042 psi | 86% | 2858 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% | 38,754 psi | 61% | 2556 fps | 99.5% |
| Accurate 4350 | <<locked>> | 80% | 51,401 psi | 81% | 2792 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 39,755 psi | 62% | 2671 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 42,772 psi | 67% | 2684 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 38,058 psi | 60% | 2615 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 34,650 psi | 54% | 2533 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 84% | 29,559 psi | 46% | 2441 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,120 psi | 68% | 2684 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,120 psi | 68% | 2684 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,124 psi | 77% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,728 psi | 67% | 2677 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,566 psi | 60% | 2625 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,420 psi | 59% | 2579 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,343 psi | 51% | 2507 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,495 psi | 65% | 2733 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 45,165 psi | 71% | 2838 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 45,556 psi | 71% | 2713 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 35,926 psi | 56% | 2562 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 34,098 psi | 53% | 2549 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 38,566 psi | 60% | 2625 fps | 97.8% |
| Bofors RP7 | <<locked>> | 80% | 53,171 psi | 83% | 2792 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 32,996 psi | 52% | 2490 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 52,823 psi | 83% | 2844 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 40,611 psi | 64% | 2618 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,885 psi | 63% | 2605 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,282 psi | 73% | 2674 fps | 100% |
| Hodgdon Retumbo | 60.9 gr | 80% | 31,502 psi | 49% | 2530 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 53,026 psi | 83% | 2881 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 44% | 1611 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,515 psi | 76% | 2730 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 48,602 psi | 76% | 2733 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,206 psi | 66% | 2618 fps | 97% |
| IMR 7828 SSC | <<locked>> | 80% | 36,941 psi | 58% | 2602 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 92% | 34,838 psi | 55% | 2589 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 52,069 psi | 82% | 2762 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,343 psi | 79% | 2756 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,431 psi | 52% | 2434 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 48,979 psi | 77% | 2779 fps | 99.4% |
| Norma 217 | <<locked>> | 88% | 30,501 psi | 48% | 2493 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 40,654 psi | 64% | 2697 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 49,937 psi | 78% | 2772 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,506 psi | 57% | 2602 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 48,907 psi | 77% | 2782 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,576 psi | 51% | 2484 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,776 psi | 45% | 1650 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,401 psi | 81% | 2815 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,545 psi | 78% | 2835 fps | 100% |
| ReloadSwiss RS 76 | 65.2 gr | 80% | 30,545 psi | 48% | 2503 fps | 96.6% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 39,668 psi | 62% | 2717 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 43,772 psi | 69% | 2657 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 42,134 psi | 66% | 2664 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 80% | 53,171 psi | 83% | 2792 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,069 psi | 82% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,343 psi | 79% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,821 psi | 80% | 2710 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,800 psi | 66% | 2657 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 44,512 psi | 70% | 2644 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 47,500 psi | 74% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,598 psi | 67% | 2641 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 51,445 psi | 81% | 2766 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,130 psi | 58% | 2520 fps | 97.8% |
| Vihtavuori N170 | <<locked>> | 96% | 53,838 psi | 84% | 2858 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 50,705 psi | 79% | 2769 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,756 psi | 65% | 2651 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,611 psi | 64% | 2687 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 35,926 psi | 56% | 2566 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 90% | 41,147 psi | 64% | 2733 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 96% | 48,269 psi | 76% | 2917 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,575 psi | 79% | 2720 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,823 psi | 83% | 2844 fps | 100% |
| Winchester StaBALL HD | 62.6 gr | 80% | 34,301 psi | 54% | 2625 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,160 psi | 61% | 2572 fps | 97.8% |
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 72 powders for 7 x 66 SE v. Hofe loaded with the .284 | 170gr | Rhino Solid Shank. Vihtavuori N570 delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,041 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 59–90 %, leaving at least 10 % headroom. The 170.0 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, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 170gr | Rhino Solid Shank 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.