Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 150gr | 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 Accurate High Country, Hodgdon Retumbo 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>> | 94% | 57,609 psi | 90% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,969 psi | 86% | 3022 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,506 psi | 87% | 3150 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 92% | 56,347 psi | 88% | 3150 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 90% | 55,767 psi | 87% | 3084 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 57,377 psi | 90% | 3150 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,706 psi | 81% | 3048 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,354 psi | 73% | 3005 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,883 psi | 88% | 3081 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,072 psi | 89% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,376 psi | 87% | 3071 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,522 psi | 90% | 3143 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,347 psi | 87% | 3058 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,766 psi | 86% | 3120 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,695 psi | 87% | 3150 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,230 psi | 87% | 3045 fps | 96.6% |
| Bofors RP15 | <<locked>> | 96% | 56,637 psi | 89% | 3130 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,273 psi | 85% | 3120 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 57,522 psi | 90% | 3143 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 57,014 psi | 89% | 3022 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 3140 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 56,521 psi | 89% | 3077 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,521 psi | 87% | 3035 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 57,217 psi | 90% | 3084 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,231 psi | 88% | 3068 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,202 psi | 88% | 2999 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3261 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,377 psi | 90% | 3120 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,159 psi | 58% | 1923 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,230 psi | 87% | 3009 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,926 psi | 86% | 2989 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 55,492 psi | 87% | 3015 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,447 psi | 85% | 3005 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 94% | 55,477 psi | 87% | 3130 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,713 psi | 65% | 2900 fps | 96.6% |
| Lovex S065 | <<locked>> | 84% | 55,724 psi | 87% | 2989 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,537 psi | 90% | 3041 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,201 psi | 87% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,347 psi | 88% | 3068 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 41,901 psi | 66% | 2927 fps | 98.7% |
| Norma MRP | <<locked>> | 92% | 57,595 psi | 90% | 3166 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,116 psi | 90% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,260 psi | 88% | 3150 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 55,999 psi | 88% | 3068 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,708 psi | 86% | 3081 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,985 psi | 60% | 1965 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,172 psi | 86% | 3048 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,406 psi | 90% | 3133 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,244 psi | 85% | 3192 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,403 psi | 84% | 3140 fps | 98.2% |
| Rottweil R 904 | <<locked>> | 90% | 56,869 psi | 89% | 3051 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 54,998 psi | 86% | 3064 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 57,014 psi | 89% | 3022 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,724 psi | 87% | 2989 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,537 psi | 90% | 3041 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,911 psi | 86% | 2940 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,578 psi | 86% | 3058 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 54,752 psi | 86% | 2982 fps | 98.3% |
| Somchem S365 | <<locked>> | 86% | 53,998 psi | 85% | 3009 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,477 psi | 87% | 3031 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,825 psi | 87% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,071 psi | 86% | 2992 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,969 psi | 86% | 3009 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 54,476 psi | 85% | 3002 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,464 psi | 90% | 3084 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,305 psi | 90% | 3166 fps | 99% |
| Vihtavuori N565 | <<locked>> | 98% | 57,479 psi | 90% | 3146 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,346 psi | 85% | 3143 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,520 psi | 85% | 2949 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,739 psi | 89% | 3081 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,551 psi | 90% | 3199 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,274 psi | 87% | 3025 fps | 99.6% |
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% | 35,998 psi | 56% | 2644 fps | 98.1% |
| Accurate 4350 | <<locked>> | 80% | 48,008 psi | 75% | 2907 fps | 100% |
| Accurate High Country | 65.2 gr | 80% | 38,972 psi | 61% | 2815 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 84% | 42,554 psi | 67% | 2884 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 40,001 psi | 63% | 2779 fps | 96.8% |
| ADI AR 2213 | <<locked>> | 84% | 40,785 psi | 64% | 2828 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 92% | 39,479 psi | 62% | 2792 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 31,212 psi | 49% | 2621 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,977 psi | 72% | 2913 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,272 psi | 83% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,016 psi | 63% | 2772 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,897 psi | 56% | 2713 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,635 psi | 54% | 2674 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,066 psi | 47% | 2579 fps | 96.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,116 psi | 60% | 2825 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,025 psi | 82% | 2986 fps | 95.8% |
| Bofors RP15 | <<locked>> | 82% | 35,766 psi | 56% | 2707 fps | 95.3% |
| Bofors RP30 | <<locked>> | 90% | 38,551 psi | 60% | 2805 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 35,897 psi | 56% | 2713 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 50,444 psi | 79% | 2910 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 37,681 psi | 59% | 2749 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 49,501 psi | 78% | 2959 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 52,025 psi | 82% | 2976 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 40,785 psi | 64% | 2772 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,772 psi | 67% | 2818 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,395 psi | 68% | 2792 fps | 100% |
| Hodgdon Retumbo | 67.6 gr | 86% | 35,839 psi | 56% | 2795 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 49,429 psi | 77% | 2986 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,949 psi | 44% | 1722 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,818 psi | 72% | 2841 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,721 psi | 81% | 2936 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 45,571 psi | 71% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,322 psi | 66% | 2772 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 84% | 39,334 psi | 62% | 2805 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,073 psi | 61% | 2838 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 49,342 psi | 77% | 2884 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,543 psi | 75% | 2871 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 30,995 psi | 49% | 2516 fps | 96.4% |
| Norma 204 | <<locked>> | 80% | 45,847 psi | 72% | 2881 fps | 98.1% |
| Norma 217 | <<locked>> | 92% | 32,068 psi | 50% | 2677 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 37,579 psi | 59% | 2782 fps | 97.6% |
| Norma URP | <<locked>> | 80% | 46,891 psi | 73% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,059 psi | 61% | 2812 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 45,745 psi | 72% | 2887 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 32,445 psi | 51% | 2618 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,022 psi | 75% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,238 psi | 72% | 2949 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,561 psi | 51% | 2694 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,409 psi | 66% | 2927 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 41,220 psi | 65% | 2756 fps | 96% |
| Rottweil R 905 | <<locked>> | 80% | 39,320 psi | 62% | 2756 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 80% | 50,444 psi | 79% | 2910 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,342 psi | 77% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,543 psi | 75% | 2871 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,109 psi | 75% | 2828 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,986 psi | 61% | 2749 fps | 96.7% |
| Somchem S361 | <<locked>> | 80% | 42,032 psi | 66% | 2743 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 44,150 psi | 69% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,972 psi | 63% | 2740 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 52,243 psi | 82% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,385 psi | 76% | 2887 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,621 psi | 54% | 2608 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 47,790 psi | 75% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,798 psi | 61% | 2756 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 40,567 psi | 64% | 2841 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 88% | 40,770 psi | 64% | 2828 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 94% | 43,627 psi | 68% | 2936 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,616 psi | 75% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,705 psi | 78% | 2963 fps | 99.7% |
| Winchester StaBALL HD | 64.5 gr | 80% | 30,734 psi | 48% | 2697 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,448 psi | 57% | 2657 fps | 95.7% |
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 77 powders for 7 x 66 SE v. Hofe loaded with the .284 | 150gr | Rhino Solid Shank. Hodgdon Retumbo delivers the highest muzzle velocity at 3,261 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,261 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 150.0 gr projectile in 0.284" calls for a 1:12.5 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. Accurate High Country, Hodgdon Retumbo, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 150gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-33, IMR 7977 Enduron 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.