Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 180gr | Lapua ScenarL 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.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 54,868 psi | 86% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,695 psi | 87% | 2772 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 56,405 psi | 88% | 2910 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 90% | 57,188 psi | 90% | 2913 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 88% | 56,289 psi | 88% | 2835 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 54,418 psi | 85% | 2851 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,188 psi | 88% | 2881 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 48,689 psi | 76% | 2851 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,560 psi | 79% | 2844 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,579 psi | 89% | 2835 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,840 psi | 89% | 2825 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,941 psi | 88% | 2828 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,766 psi | 86% | 2848 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,391 psi | 88% | 2808 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,014 psi | 88% | 2877 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 56,724 psi | 89% | 2897 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 53,055 psi | 83% | 2907 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,332 psi | 87% | 2815 fps | 98.2% |
| Bofors RP15 | <<locked>> | 94% | 57,682 psi | 90% | 2890 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 55,579 psi | 87% | 2890 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 54,766 psi | 86% | 2848 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,188 psi | 90% | 2769 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 54,085 psi | 85% | 2844 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 57,101 psi | 89% | 2825 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 57,667 psi | 90% | 2844 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,608 psi | 89% | 2828 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,971 psi | 89% | 2746 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 54,955 psi | 86% | 2963 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 57,595 psi | 90% | 2864 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 59% | 1742 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,463 psi | 87% | 2759 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,057 psi | 88% | 2762 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 54,650 psi | 86% | 2766 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 92% | 56,260 psi | 88% | 2890 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,180 psi | 72% | 2762 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 55,912 psi | 88% | 2736 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,172 psi | 85% | 2736 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,101 psi | 88% | 2769 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,652 psi | 89% | 2818 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 46,775 psi | 73% | 2785 fps | 100% |
| Norma MRP | <<locked>> | 88% | 54,636 psi | 86% | 2864 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,580 psi | 90% | 2802 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 57,435 psi | 90% | 2913 fps | 100% |
| Ramshot Hunter | <<locked>> | 84% | 56,449 psi | 88% | 2815 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 55,593 psi | 87% | 2841 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,406 psi | 60% | 1785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,782 psi | 87% | 2795 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,056 psi | 85% | 2822 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 55,347 psi | 87% | 2953 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 54,520 psi | 85% | 2917 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 88% | 57,246 psi | 90% | 2808 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 55,637 psi | 87% | 2818 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,188 psi | 90% | 2769 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,912 psi | 88% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,172 psi | 85% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,795 psi | 86% | 2694 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,230 psi | 87% | 2815 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 54,868 psi | 86% | 2746 fps | 99.4% |
| Somchem S365 | <<locked>> | 84% | 54,882 psi | 86% | 2756 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,028 psi | 88% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,550 psi | 87% | 2743 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,622 psi | 87% | 2772 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 54,331 psi | 85% | 2792 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 82% | 54,723 psi | 86% | 2749 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 54,795 psi | 86% | 2785 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 54,302 psi | 85% | 2864 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 54,708 psi | 86% | 2858 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 55,608 psi | 87% | 2923 fps | 99.2% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2979 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,868 psi | 86% | 2697 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,101 psi | 89% | 2825 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,129 psi | 86% | 2897 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,840 psi | 88% | 2789 fps | 100% |
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% | 39,233 psi | 61% | 2493 fps | 99.7% |
| Accurate 4350 | <<locked>> | 80% | 51,996 psi | 81% | 2720 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 42,844 psi | 67% | 2671 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 80% | 40,321 psi | 63% | 2612 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 80% | 43,265 psi | 68% | 2618 fps | 99% |
| ADI AR 2213 | <<locked>> | 80% | 38,754 psi | 61% | 2559 fps | 97% |
| ADI AR 2217 | <<locked>> | 84% | 32,924 psi | 52% | 2421 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 98% | 45,266 psi | 71% | 2782 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 82% | 28,036 psi | 44% | 2333 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,627 psi | 68% | 2618 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,821 psi | 78% | 2723 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,221 psi | 68% | 2612 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,276 psi | 62% | 2569 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,898 psi | 59% | 2513 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,779 psi | 51% | 2451 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,206 psi | 66% | 2671 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 42,670 psi | 67% | 2717 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 43,192 psi | 68% | 2592 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 36,535 psi | 57% | 2507 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 32,416 psi | 51% | 2438 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 39,276 psi | 62% | 2569 fps | 98.4% |
| Bofors RP7 | <<locked>> | 80% | 53,592 psi | 84% | 2717 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 31,285 psi | 49% | 2379 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 53,519 psi | 84% | 2776 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,147 psi | 64% | 2559 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,582 psi | 64% | 2546 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,905 psi | 74% | 2602 fps | 100% |
| Hodgdon Retumbo | 59 gr | 80% | 31,966 psi | 50% | 2480 fps | 96.7% |
| Hodgdon Superformance | <<locked>> | 80% | 53,621 psi | 84% | 2808 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 44% | 1558 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,008 psi | 77% | 2657 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 49,110 psi | 77% | 2661 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,598 psi | 67% | 2556 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 80% | 37,434 psi | 59% | 2539 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 90% | 33,054 psi | 52% | 2477 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 52,460 psi | 82% | 2684 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,039 psi | 80% | 2687 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,881 psi | 53% | 2379 fps | 98.9% |
| Norma 204 | <<locked>> | 80% | 49,414 psi | 77% | 2707 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 29,095 psi | 46% | 2392 fps | 96% |
| Norma MRP | <<locked>> | 80% | 41,350 psi | 65% | 2638 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 50,676 psi | 79% | 2703 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,144 psi | 58% | 2549 fps | 97% |
| Ramshot Hunter | <<locked>> | 80% | 49,400 psi | 77% | 2710 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,170 psi | 52% | 2434 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 1594 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,996 psi | 81% | 2740 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,459 psi | 79% | 2769 fps | 100% |
| ReloadSwiss RS 76 | 63.2 gr | 80% | 31,024 psi | 49% | 2454 fps | 97.5% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 37,550 psi | 59% | 2602 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 44,396 psi | 70% | 2595 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 80% | 42,801 psi | 67% | 2602 fps | 99% |
| Rottweil R 907 | <<locked>> | 80% | 53,592 psi | 84% | 2717 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,460 psi | 82% | 2684 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,039 psi | 80% | 2687 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,532 psi | 81% | 2644 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,467 psi | 67% | 2598 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 45,208 psi | 71% | 2585 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 48,080 psi | 75% | 2657 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,323 psi | 68% | 2582 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 51,996 psi | 81% | 2694 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,608 psi | 59% | 2461 fps | 98.3% |
| Vihtavuori N170 | <<locked>> | 94% | 50,879 psi | 80% | 2736 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 51,314 psi | 80% | 2700 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,453 psi | 67% | 2589 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,278 psi | 65% | 2628 fps | 97.3% |
| Vihtavuori N565 | <<locked>> | 80% | 34,026 psi | 53% | 2451 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 88% | 39,030 psi | 61% | 2615 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 94% | 45,571 psi | 71% | 2789 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,198 psi | 80% | 2651 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,519 psi | 84% | 2776 fps | 100% |
| Winchester StaBALL HD | 60.6 gr | 80% | 34,925 psi | 55% | 2566 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,711 psi | 62% | 2513 fps | 98.4% |
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 73 powders for 7 x 66 SE v. Hofe loaded with the .284 | 180gr | Lapua ScenarL. Vihtavuori N570 delivers the highest muzzle velocity at 2,979 fps; across all powders the maximum-charge window runs from 1,742 fps to 2,979 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 180.0 gr projectile in 0.284" calls for a 1:9.5 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 180gr | Lapua ScenarL 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.