Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 150gr | Nosler AccuBond bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Norma MRP.
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% | 55,579 psi | 87% | 3009 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,681 psi | 89% | 3045 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 57,029 psi | 89% | 3169 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 92% | 53,954 psi | 85% | 3104 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 82% | 57,537 psi | 90% | 2999 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,595 psi | 90% | 3107 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 55,201 psi | 87% | 3107 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,661 psi | 78% | 2999 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,251 psi | 69% | 2959 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,580 psi | 90% | 3100 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,882 psi | 86% | 3058 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,884 psi | 89% | 3091 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,245 psi | 87% | 3104 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,550 psi | 89% | 3071 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,927 psi | 88% | 3136 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,290 psi | 90% | 3173 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,014 psi | 89% | 3064 fps | 96.7% |
| Bofors RP15 | <<locked>> | 96% | 54,433 psi | 85% | 3091 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 3074 fps | 98.8% |
| Bofors RP5 | <<locked>> | 94% | 55,245 psi | 87% | 3104 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 55,288 psi | 87% | 2986 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,665 psi | 86% | 3091 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 54,766 psi | 86% | 3045 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 57,276 psi | 90% | 3054 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 55,303 psi | 87% | 3045 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,070 psi | 85% | 3025 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,346 psi | 85% | 2966 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,766 psi | 86% | 3212 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,042 psi | 86% | 3081 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1906 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,101 psi | 89% | 3031 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,681 psi | 89% | 3009 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 57,029 psi | 89% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,304 psi | 88% | 3028 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 96% | 56,985 psi | 89% | 3146 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 57,450 psi | 90% | 3009 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,666 psi | 87% | 3005 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 3025 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,273 psi | 85% | 3028 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 39,798 psi | 62% | 2881 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 55,230 psi | 87% | 3127 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,056 psi | 86% | 3025 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,664 psi | 84% | 3104 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 57,638 psi | 90% | 3087 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,231 psi | 88% | 3097 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,869 psi | 59% | 1952 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,724 psi | 89% | 3068 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,911 psi | 86% | 3094 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,550 psi | 87% | 3209 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,473 psi | 79% | 3087 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 56,695 psi | 89% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,085 psi | 86% | 3015 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 56,507 psi | 89% | 3081 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 55,288 psi | 87% | 2986 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,450 psi | 90% | 3009 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,666 psi | 87% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,362 psi | 88% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,869 psi | 89% | 2963 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,057 psi | 88% | 3074 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 56,478 psi | 89% | 2982 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,681 psi | 89% | 3005 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 55,651 psi | 87% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,014 psi | 89% | 3051 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 57,566 psi | 90% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,840 psi | 89% | 3015 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,695 psi | 89% | 3028 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 55,999 psi | 88% | 3022 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,216 psi | 87% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,056 psi | 86% | 3123 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 54,926 psi | 86% | 3100 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,619 psi | 81% | 3094 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,536 psi | 89% | 2972 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,766 psi | 86% | 3045 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,201 psi | 85% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,101 psi | 89% | 3048 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% | 34,577 psi | 54% | 2608 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 46,296 psi | 73% | 2871 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 40,147 psi | 63% | 2841 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 86% | 43,656 psi | 68% | 2904 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 54,012 psi | 85% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,609 psi | 61% | 2743 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 86% | 42,090 psi | 66% | 2851 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 94% | 40,611 psi | 64% | 2812 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 90% | 31,966 psi | 50% | 2641 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,222 psi | 69% | 2877 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,082 psi | 80% | 2999 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,595 psi | 60% | 2736 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,883 psi | 58% | 2736 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,156 psi | 52% | 2638 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,921 psi | 45% | 2539 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,260 psi | 57% | 2782 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,328 psi | 79% | 2943 fps | 95% |
| Bofors RP15 | <<locked>> | 84% | 36,593 psi | 57% | 2726 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 39,334 psi | 62% | 2825 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 36,883 psi | 58% | 2736 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 48,907 psi | 77% | 2874 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 38,812 psi | 61% | 2772 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 47,935 psi | 75% | 2923 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 50,256 psi | 79% | 2936 fps | 99% |
| Hodgdon H4831 | <<locked>> | 84% | 42,018 psi | 66% | 2795 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,121 psi | 69% | 2838 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,742 psi | 65% | 2756 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,374 psi | 54% | 2746 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 47,587 psi | 75% | 2953 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 43% | 1703 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,353 psi | 70% | 2805 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,241 psi | 79% | 2904 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 43,976 psi | 69% | 2815 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,089 psi | 64% | 2740 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 86% | 40,509 psi | 63% | 2828 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 47,819 psi | 75% | 2851 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 46,035 psi | 72% | 2838 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 29,733 psi | 47% | 2480 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 44,440 psi | 70% | 2844 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 32,648 psi | 51% | 2690 fps | 95.3% |
| Norma MRP | 63 gr | 80% | 35,955 psi | 56% | 2740 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 45,252 psi | 71% | 2858 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 40,263 psi | 63% | 2835 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 44,237 psi | 69% | 2858 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 33,402 psi | 52% | 2641 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 44% | 1745 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,238 psi | 72% | 2894 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,324 psi | 69% | 2910 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,562 psi | 53% | 2723 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,352 psi | 68% | 2943 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 53,156 psi | 83% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,827 psi | 62% | 2720 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 37,840 psi | 59% | 2720 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 48,907 psi | 77% | 2874 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,819 psi | 75% | 2851 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 46,035 psi | 72% | 2838 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,055 psi | 83% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,717 psi | 73% | 2792 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,521 psi | 59% | 2713 fps | 96% |
| Somchem S355 | <<locked>> | 80% | 52,997 psi | 83% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,366 psi | 68% | 2766 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 42,409 psi | 66% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,392 psi | 60% | 2700 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 50,633 psi | 79% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,760 psi | 73% | 2851 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,315 psi | 52% | 2569 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 46,122 psi | 72% | 2854 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,173 psi | 58% | 2717 fps | 99.6% |
| Vihtavuori N560 | 66.2 gr | 84% | 41,698 psi | 65% | 2861 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 90% | 41,814 psi | 66% | 2851 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 44,672 psi | 70% | 2956 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,876 psi | 72% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,935 psi | 75% | 2923 fps | 99.5% |
| Winchester StaBALL HD | 62.4 gr | 80% | 29,515 psi | 46% | 2657 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,172 psi | 55% | 2625 fps | 95% |
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 80 powders for 7 x 66 SE v. Hofe loaded with the .284 | 150gr | Nosler AccuBond. Hodgdon Retumbo delivers the highest muzzle velocity at 3,212 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,212 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 1:9.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 150gr | Nosler AccuBond they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 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.