Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 152gr | Barnes LRX BT bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, IMR 7828 SSC and Vihtavuori N560.
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>> | 96% | 57,130 psi | 90% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,766 psi | 86% | 2999 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,927 psi | 88% | 3120 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 56,057 psi | 88% | 2959 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,985 psi | 88% | 3061 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 96% | 57,508 psi | 90% | 3127 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,979 psi | 75% | 2953 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,583 psi | 67% | 2907 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,334 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,043 psi | 88% | 3061 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,290 psi | 90% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,274 psi | 87% | 3045 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,276 psi | 90% | 3120 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,708 psi | 86% | 3031 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,998 psi | 85% | 3091 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,056 psi | 86% | 3123 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 55,709 psi | 87% | 3022 fps | 96.4% |
| Bofors RP15 | <<locked>> | 98% | 56,159 psi | 88% | 3100 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,922 psi | 78% | 3025 fps | 98.6% |
| Bofors RP5 | <<locked>> | 96% | 57,276 psi | 90% | 3120 fps | 99.7% |
| Bofors RP7 | <<locked>> | 86% | 57,392 psi | 90% | 3002 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,968 psi | 83% | 3045 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 86% | 56,855 psi | 89% | 3061 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 55,869 psi | 88% | 3015 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 94% | 57,261 psi | 90% | 3058 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,246 psi | 88% | 3041 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,202 psi | 88% | 2976 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,895 psi | 83% | 3163 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 57,421 psi | 90% | 3097 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1886 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,492 psi | 87% | 2989 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,564 psi | 87% | 2972 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 55,347 psi | 87% | 2992 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,839 psi | 86% | 2986 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 96% | 55,114 psi | 86% | 3100 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 55,869 psi | 88% | 2966 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,653 psi | 90% | 3018 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 2979 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,565 psi | 89% | 3045 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 38,043 psi | 60% | 2825 fps | 97.6% |
| Norma MRP | <<locked>> | 94% | 57,290 psi | 90% | 3143 fps | 100% |
| Norma URP | <<locked>> | 88% | 57,130 psi | 90% | 3038 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,941 psi | 88% | 3123 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 55,956 psi | 88% | 3045 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,056 psi | 85% | 3048 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1932 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,753 psi | 89% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,810 psi | 86% | 3022 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,276 psi | 90% | 3110 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 3156 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,356 psi | 76% | 3031 fps | 97% |
| Rottweil R 903 | <<locked>> | 82% | 55,071 psi | 86% | 2946 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,159 psi | 90% | 3028 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 54,708 psi | 86% | 3035 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 57,392 psi | 90% | 3002 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,869 psi | 88% | 2966 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,653 psi | 90% | 3018 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,695 psi | 89% | 3009 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,085 psi | 86% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,085 psi | 86% | 2920 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,273 psi | 85% | 3028 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 54,737 psi | 86% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,998 psi | 86% | 2959 fps | 98.2% |
| Somchem S365 | <<locked>> | 90% | 57,493 psi | 90% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,259 psi | 87% | 3005 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 55,941 psi | 88% | 2907 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,274 psi | 87% | 2976 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,810 psi | 86% | 2986 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 54,418 psi | 85% | 2982 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,840 psi | 89% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,145 psi | 90% | 3140 fps | 98.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3114 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,530 psi | 78% | 3038 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,969 psi | 86% | 2933 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,855 psi | 89% | 3061 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,260 psi | 88% | 3169 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,259 psi | 87% | 3002 fps | 99.5% |
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% | 32,692 psi | 51% | 2552 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 44,309 psi | 69% | 2822 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 45,092 psi | 71% | 2920 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 52,721 psi | 83% | 2907 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,159 psi | 58% | 2694 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 40,712 psi | 64% | 2805 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 39,117 psi | 61% | 2759 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 92% | 32,590 psi | 51% | 2648 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,925 psi | 85% | 2930 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,801 psi | 67% | 2835 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,414 psi | 77% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,115 psi | 58% | 2687 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,346 psi | 55% | 2684 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,691 psi | 50% | 2589 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,485 psi | 43% | 2480 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,534 psi | 54% | 2726 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,257 psi | 82% | 2963 fps | 95.6% |
| Bofors RP15 | <<locked>> | 86% | 37,565 psi | 59% | 2736 fps | 95.9% |
| Bofors RP30 | <<locked>> | 92% | 37,565 psi | 59% | 2769 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 35,346 psi | 55% | 2684 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 47,326 psi | 74% | 2831 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 37,318 psi | 58% | 2720 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 46,325 psi | 73% | 2877 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 48,979 psi | 77% | 2897 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 43,511 psi | 68% | 2812 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,714 psi | 67% | 2795 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,248 psi | 63% | 2713 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,085 psi | 55% | 2756 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 45,890 psi | 72% | 2904 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 43% | 1686 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,931 psi | 67% | 2759 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,820 psi | 77% | 2858 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 42,424 psi | 66% | 2772 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,424 psi | 66% | 2753 fps | 95.6% |
| IMR 7828 SSC | 64.1 gr | 86% | 39,073 psi | 61% | 2779 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 46,398 psi | 73% | 2808 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 44,570 psi | 70% | 2795 fps | 99.1% |
| Lovex S071 | <<locked>> | 82% | 30,008 psi | 47% | 2480 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 42,931 psi | 67% | 2799 fps | 97.3% |
| Norma 217 | <<locked>> | 96% | 33,069 psi | 52% | 2694 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 34,360 psi | 54% | 2687 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 43,787 psi | 69% | 2815 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 38,609 psi | 61% | 2782 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 42,699 psi | 67% | 2808 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 34,243 psi | 54% | 2651 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 44% | 1729 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,591 psi | 82% | 3002 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,483 psi | 70% | 2844 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,772 psi | 67% | 2864 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,010 psi | 50% | 2661 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,773 psi | 70% | 2959 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 51,459 psi | 81% | 2890 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,292 psi | 65% | 2736 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 36,419 psi | 57% | 2671 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 47,326 psi | 74% | 2831 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,398 psi | 73% | 2808 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 44,570 psi | 70% | 2795 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,113 psi | 83% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,750 psi | 81% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,324 psi | 71% | 2753 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,100 psi | 57% | 2664 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 51,459 psi | 81% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 41,974 psi | 66% | 2720 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 40,625 psi | 64% | 2766 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,927 psi | 58% | 2654 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 49,211 psi | 77% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,136 psi | 71% | 2808 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,113 psi | 53% | 2579 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 44,498 psi | 70% | 2808 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 35,476 psi | 56% | 2664 fps | 99.4% |
| Vihtavuori N560 | 66.6 gr | 86% | 43,047 psi | 67% | 2877 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 90% | 39,958 psi | 63% | 2795 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 98% | 46,166 psi | 72% | 2976 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,483 psi | 70% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,557 psi | 73% | 2884 fps | 99.3% |
| Winchester StaBALL HD | 61.3 gr | 80% | 27,978 psi | 44% | 2595 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,129 psi | 57% | 2635 fps | 95.4% |
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 82 powders for 7 x 66 SE v. Hofe loaded with the .284 | 152gr | Barnes LRX BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,169 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,169 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 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 152.0 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, IMR 7828 SSC, Vihtavuori N560 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 152gr | Barnes LRX BT 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.