Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 160gr | Speer TBBC bullet and 73 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 55,100 psi | 86% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,086 psi | 88% | 2943 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,521 psi | 89% | 3074 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 57,609 psi | 90% | 3081 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 90% | 56,913 psi | 89% | 3009 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 54,621 psi | 86% | 3015 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,634 psi | 82% | 2979 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,297 psi | 74% | 2943 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,145 psi | 90% | 3005 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,971 psi | 89% | 2999 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,492 psi | 89% | 2999 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,839 psi | 86% | 3012 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,478 psi | 89% | 2979 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,709 psi | 87% | 3045 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,985 psi | 89% | 3074 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,188 psi | 88% | 2976 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 57,653 psi | 90% | 3054 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,651 psi | 87% | 3051 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 54,839 psi | 86% | 3012 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 54,360 psi | 85% | 2887 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 54,360 psi | 85% | 3009 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 57,682 psi | 90% | 3002 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,420 psi | 88% | 2956 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 54,621 psi | 86% | 2953 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,043 psi | 89% | 2992 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,363 psi | 90% | 2920 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,578 psi | 86% | 3123 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,389 psi | 85% | 2982 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 59% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,246 psi | 88% | 2933 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,898 psi | 88% | 2913 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,376 psi | 88% | 2933 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,405 psi | 87% | 2933 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 94% | 56,507 psi | 89% | 3054 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,772 psi | 67% | 2844 fps | 97.5% |
| Lovex S065 | <<locked>> | 84% | 56,536 psi | 89% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,839 psi | 86% | 2907 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,333 psi | 88% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,421 psi | 90% | 2992 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 43,033 psi | 67% | 2871 fps | 99.3% |
| Norma MRP | <<locked>> | 90% | 54,752 psi | 86% | 3031 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,389 psi | 85% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,522 psi | 90% | 3081 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 57,043 psi | 89% | 2989 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,956 psi | 88% | 3009 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,261 psi | 60% | 1900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,246 psi | 88% | 2969 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,563 psi | 86% | 2999 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,434 psi | 87% | 3120 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,578 psi | 86% | 3074 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 88% | 54,302 psi | 85% | 2920 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 55,898 psi | 88% | 2986 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 54,360 psi | 85% | 2887 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,536 psi | 89% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,839 psi | 86% | 2907 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,811 psi | 87% | 2864 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,477 psi | 87% | 2982 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 55,709 psi | 87% | 2913 fps | 98.8% |
| Somchem S365 | <<locked>> | 86% | 55,230 psi | 87% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,434 psi | 88% | 2956 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,579 psi | 89% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,086 psi | 88% | 2917 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,072 psi | 88% | 2940 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 55,347 psi | 87% | 2923 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,839 psi | 86% | 2953 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,491 psi | 85% | 3028 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 96% | 54,723 psi | 86% | 3012 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,535 psi | 87% | 3077 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 3068 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,622 psi | 87% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,682 psi | 90% | 3002 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,650 psi | 86% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,405 psi | 88% | 2956 fps | 99.8% |
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% | 36,840 psi | 58% | 2589 fps | 98.7% |
| Accurate 4350 | <<locked>> | 80% | 49,037 psi | 77% | 2835 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 39,885 psi | 63% | 2756 fps | 96.3% |
| Accurate MAGPRO | <<locked>> | 82% | 40,408 psi | 63% | 2756 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 40,843 psi | 64% | 2717 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 82% | 38,986 psi | 61% | 2707 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 90% | 37,652 psi | 59% | 2671 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 86% | 29,907 psi | 47% | 2513 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,205 psi | 65% | 2717 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,862 psi | 73% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,828 psi | 64% | 2710 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,579 psi | 57% | 2651 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,433 psi | 56% | 2612 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,734 psi | 48% | 2530 fps | 97.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,015 psi | 61% | 2759 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,617 psi | 78% | 2861 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 34,098 psi | 53% | 2585 fps | 95.3% |
| Bofors RP30 | <<locked>> | 88% | 36,985 psi | 58% | 2690 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 36,579 psi | 57% | 2651 fps | 96.5% |
| Bofors RP7 | <<locked>> | 80% | 51,242 psi | 80% | 2835 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 36,013 psi | 56% | 2635 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 50,575 psi | 79% | 2890 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 52,779 psi | 83% | 2897 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 38,740 psi | 61% | 2648 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,872 psi | 64% | 2697 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,222 psi | 69% | 2717 fps | 100% |
| Hodgdon Retumbo | 62.5 gr | 82% | 31,937 psi | 50% | 2605 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 50,502 psi | 79% | 2917 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 44% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,615 psi | 73% | 2769 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,547 psi | 82% | 2858 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 46,499 psi | 73% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,538 psi | 64% | 2654 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 82% | 37,608 psi | 59% | 2684 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,347 psi | 59% | 2720 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 50,140 psi | 79% | 2808 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,385 psi | 76% | 2799 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 31,720 psi | 50% | 2461 fps | 97.3% |
| Norma 204 | <<locked>> | 80% | 46,876 psi | 73% | 2815 fps | 98.7% |
| Norma 217 | <<locked>> | 90% | 30,690 psi | 48% | 2566 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 38,479 psi | 60% | 2723 fps | 98.3% |
| Norma URP | <<locked>> | 80% | 47,805 psi | 75% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,246 psi | 58% | 2690 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 46,746 psi | 73% | 2822 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 30,835 psi | 48% | 2500 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,558 psi | 45% | 1696 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,008 psi | 77% | 2858 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,065 psi | 74% | 2877 fps | 100% |
| ReloadSwiss RS 76 | 66.9 gr | 82% | 30,995 psi | 49% | 2579 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,234 psi | 63% | 2799 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 41,974 psi | 66% | 2690 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 40,176 psi | 63% | 2694 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 80% | 51,242 psi | 80% | 2835 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,140 psi | 79% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,385 psi | 76% | 2799 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,950 psi | 77% | 2756 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,842 psi | 62% | 2690 fps | 97.5% |
| Somchem S361 | <<locked>> | 80% | 42,670 psi | 67% | 2677 fps | 96.2% |
| Somchem S365 | <<locked>> | 80% | 45,179 psi | 71% | 2776 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,654 psi | 64% | 2674 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 80% | 53,127 psi | 83% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,313 psi | 77% | 2812 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,389 psi | 55% | 2549 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 80% | 48,602 psi | 76% | 2815 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,653 psi | 62% | 2687 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,493 psi | 60% | 2710 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 86% | 38,972 psi | 61% | 2710 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 92% | 41,640 psi | 65% | 2815 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 98% | 48,805 psi | 76% | 2999 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,399 psi | 76% | 2766 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,575 psi | 79% | 2890 fps | 99.9% |
| Winchester StaBALL HD | 62.7 gr | 80% | 31,807 psi | 50% | 2648 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,318 psi | 58% | 2602 fps | 96.6% |
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 73 powders for 7 x 66 SE v. Hofe loaded with the .284 | 160gr | Speer TBBC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,123 fps; across all powders the maximum-charge window runs from 1,857 fps to 3,123 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 160.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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 | 160gr | Speer TBBC 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.