Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 165gr | Remington SP Core-Lokt bullet and 71 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% | 54,534 psi | 85% | 2874 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,434 psi | 87% | 2897 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 56,101 psi | 88% | 3031 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 90% | 56,985 psi | 89% | 3035 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 88% | 56,202 psi | 88% | 2966 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 54,215 psi | 85% | 2976 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,869 psi | 88% | 2999 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2963 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,260 psi | 88% | 2959 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,376 psi | 88% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,622 psi | 87% | 2949 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,607 psi | 86% | 2969 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,072 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 55,782 psi | 87% | 3005 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 56,652 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,982 psi | 83% | 3025 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,071 psi | 86% | 2933 fps | 97.6% |
| Bofors RP15 | <<locked>> | 94% | 57,290 psi | 90% | 3012 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 55,405 psi | 87% | 3012 fps | 99.8% |
| Bofors RP5 | <<locked>> | 90% | 54,607 psi | 86% | 2969 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 56,869 psi | 89% | 2894 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,740 psi | 90% | 3025 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 56,681 psi | 89% | 2949 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 57,406 psi | 90% | 2966 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,463 psi | 88% | 2949 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,594 psi | 89% | 2871 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 54,665 psi | 86% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 57,435 psi | 90% | 2992 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1841 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,332 psi | 87% | 2884 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,651 psi | 87% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 54,621 psi | 86% | 2890 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 92% | 56,173 psi | 88% | 3015 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,021 psi | 72% | 2874 fps | 98.7% |
| Lovex S065 | <<locked>> | 82% | 55,680 psi | 87% | 2861 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,450 psi | 90% | 2913 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 55,956 psi | 88% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,202 psi | 88% | 2940 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 46,499 psi | 73% | 2900 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 54,375 psi | 85% | 2986 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,232 psi | 90% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,985 psi | 89% | 3035 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 55,999 psi | 88% | 2936 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 55,492 psi | 87% | 2966 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,406 psi | 60% | 1886 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,361 psi | 87% | 2920 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 53,737 psi | 84% | 2946 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 55,332 psi | 87% | 3077 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 54,462 psi | 85% | 3035 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 57,043 psi | 89% | 2933 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 55,332 psi | 87% | 2940 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 56,869 psi | 89% | 2894 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,680 psi | 87% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,450 psi | 90% | 2913 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,607 psi | 86% | 2815 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,926 psi | 86% | 2936 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 54,665 psi | 86% | 2867 fps | 99.1% |
| Somchem S365 | <<locked>> | 84% | 54,708 psi | 86% | 2881 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,782 psi | 87% | 2913 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,317 psi | 87% | 2871 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,579 psi | 87% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 54,375 psi | 85% | 2871 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 54,592 psi | 86% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 54,012 psi | 85% | 2986 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 94% | 54,389 psi | 85% | 2972 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 98% | 55,376 psi | 87% | 3041 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 56,289 psi | 88% | 3097 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,505 psi | 85% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,898 psi | 89% | 2953 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 54,969 psi | 86% | 3022 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,564 psi | 87% | 2910 fps | 99.9% |
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% | 39,030 psi | 61% | 2602 fps | 99.4% |
| Accurate 4350 | <<locked>> | 80% | 51,735 psi | 81% | 2841 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 42,482 psi | 67% | 2779 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 80% | 40,030 psi | 63% | 2717 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 43,076 psi | 68% | 2730 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 38,464 psi | 60% | 2664 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 34,911 psi | 55% | 2575 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 29,791 psi | 47% | 2484 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,395 psi | 68% | 2730 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,516 psi | 78% | 2844 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,004 psi | 67% | 2723 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,972 psi | 61% | 2674 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,594 psi | 59% | 2621 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,605 psi | 51% | 2552 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,018 psi | 66% | 2782 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 45,629 psi | 72% | 2884 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 45,788 psi | 72% | 2756 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 36,216 psi | 57% | 2608 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 34,418 psi | 54% | 2592 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 38,972 psi | 61% | 2674 fps | 97.7% |
| Bofors RP7 | <<locked>> | 80% | 53,301 psi | 84% | 2838 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 33,286 psi | 52% | 2536 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 53,084 psi | 83% | 2894 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,017 psi | 64% | 2667 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,292 psi | 63% | 2654 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,673 psi | 73% | 2723 fps | 100% |
| Hodgdon Retumbo | 62.7 gr | 80% | 31,720 psi | 50% | 2572 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 53,461 psi | 84% | 2930 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 44% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,805 psi | 76% | 2776 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 48,936 psi | 77% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,467 psi | 67% | 2664 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 37,173 psi | 58% | 2644 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 35,143 psi | 55% | 2635 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 52,214 psi | 82% | 2808 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,691 psi | 79% | 2808 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,649 psi | 53% | 2480 fps | 98.3% |
| Norma 204 | <<locked>> | 80% | 49,139 psi | 77% | 2822 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 30,850 psi | 48% | 2539 fps | 96% |
| Norma MRP | <<locked>> | 80% | 41,017 psi | 64% | 2743 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 50,285 psi | 79% | 2822 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,869 psi | 58% | 2651 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 49,124 psi | 77% | 2828 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,996 psi | 52% | 2530 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,747 psi | 45% | 1683 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,808 psi | 81% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,125 psi | 79% | 2887 fps | 100% |
| ReloadSwiss RS 76 | 67.1 gr | 80% | 30,763 psi | 48% | 2543 fps | 96.5% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 40,118 psi | 63% | 2762 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 44,077 psi | 69% | 2703 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 80% | 42,453 psi | 67% | 2710 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 80% | 53,301 psi | 84% | 2838 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,214 psi | 82% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,691 psi | 79% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,097 psi | 80% | 2759 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,119 psi | 66% | 2707 fps | 98.4% |
| Somchem S361 | <<locked>> | 80% | 44,962 psi | 70% | 2697 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 47,863 psi | 75% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,018 psi | 67% | 2694 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 51,750 psi | 81% | 2815 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,391 psi | 59% | 2566 fps | 97.7% |
| Vihtavuori N550 | <<locked>> | 80% | 50,923 psi | 80% | 2818 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,134 psi | 66% | 2700 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,944 psi | 64% | 2733 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 82% | 36,230 psi | 57% | 2612 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 90% | 41,539 psi | 65% | 2779 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 96% | 48,646 psi | 76% | 2959 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,865 psi | 80% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,272 psi | 83% | 2897 fps | 100% |
| Winchester StaBALL HD | 64.4 gr | 80% | 34,563 psi | 54% | 2667 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,363 psi | 62% | 2615 fps | 97.7% |
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 71 powders for 7 x 66 SE v. Hofe loaded with the .284 | 165gr | Remington SP Core-Lokt. Vihtavuori N570 delivers the highest muzzle velocity at 3,097 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,097 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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 165.0 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 2225, Alliant Reloder-33 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 | 165gr | Remington SP Core-Lokt 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.