Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:171 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:7 x 66 SE v. Hofe load data
Case Length (l3):2.598"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:93 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:63,817 psi
Load data in caliber 7 x 66 SE v. Hofe with .284 | 171gr | Barnes Match Burner BT bullet and 144 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 Accurate High Country.
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% | 57,392 psi | 90% | 2861 fps | 100% |
| Accurate 3100 | <<locked>> | 90% | 55,376 psi | 87% | 2838 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,578 psi | 86% | 2828 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,347 psi | 88% | 2858 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 55,056 psi | 86% | 2959 fps | 99.7% |
| Accurate High Country | <<locked>> | 88% | 57,058 psi | 89% | 2995 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 55,985 psi | 88% | 2966 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 88% | 54,230 psi | 85% | 2943 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 55,288 psi | 87% | 2894 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 56,985 psi | 89% | 2927 fps | 100% |
| ADI AR 2213 | <<locked>> | 92% | 56,956 psi | 89% | 2963 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 90% | 55,085 psi | 86% | 2940 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,853 psi | 86% | 2930 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 2969 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 49,530 psi | 78% | 2943 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,501 psi | 78% | 2897 fps | 100% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,474 psi | 81% | 2933 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,579 psi | 87% | 2894 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 57,217 psi | 90% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,492 psi | 87% | 2881 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,261 psi | 90% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,940 psi | 86% | 2884 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,565 psi | 89% | 2917 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,232 psi | 90% | 2956 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,448 psi | 87% | 2936 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,172 psi | 86% | 2867 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,956 psi | 89% | 2894 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,694 psi | 86% | 2936 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,898 psi | 89% | 2969 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,419 psi | 87% | 2956 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 53,577 psi | 84% | 2930 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,764 psi | 81% | 2953 fps | 97.1% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,186 psi | 85% | 2999 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,433 psi | 85% | 2867 fps | 97.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,854 psi | 88% | 2900 fps | 98.1% |
| Bofors RP15 | <<locked>> | 94% | 56,376 psi | 88% | 2943 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 54,679 psi | 86% | 2923 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 54,505 psi | 85% | 2946 fps | 99.8% |
| Bofors RP30 | <<locked>> | 98% | 56,507 psi | 89% | 2982 fps | 99.9% |
| Bofors RP5 | <<locked>> | 92% | 57,232 psi | 90% | 2956 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 55,448 psi | 87% | 2936 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 56,057 psi | 88% | 2825 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,624 psi | 90% | 2858 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 56,681 psi | 89% | 2956 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 54,781 psi | 86% | 2933 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 56,014 psi | 88% | 2884 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 57,580 psi | 90% | 2913 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,492 psi | 89% | 2897 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 88% | 54,650 psi | 86% | 2877 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,521 psi | 87% | 2881 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,305 psi | 90% | 2917 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,854 psi | 88% | 2805 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,493 psi | 90% | 2831 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,406 psi | 90% | 3074 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,825 psi | 87% | 3054 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,362 psi | 88% | 2920 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,391 psi | 59% | 1795 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,536 psi | 59% | 1808 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,491 psi | 85% | 2818 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,144 psi | 88% | 2851 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,392 psi | 90% | 2844 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,969 psi | 86% | 2822 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,536 psi | 89% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,261 psi | 90% | 2877 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,259 psi | 87% | 2854 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 55,201 psi | 87% | 2946 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 92% | 57,130 psi | 90% | 2982 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,918 psi | 70% | 2805 fps | 98.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,050 psi | 74% | 2848 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 54,868 psi | 86% | 2792 fps | 100% |
| Lovex S065 | <<locked>> | 82% | 56,376 psi | 88% | 2822 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,768 psi | 89% | 2848 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,795 psi | 86% | 2825 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,955 psi | 86% | 2825 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,811 psi | 89% | 2858 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,492 psi | 87% | 2874 fps | 99.9% |
| Norma 204 | <<locked>> | 84% | 57,159 psi | 90% | 2907 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 45,382 psi | 71% | 2831 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 47,659 psi | 75% | 2874 fps | 100% |
| Norma MRP | <<locked>> | 90% | 57,290 psi | 90% | 2976 fps | 100% |
| Norma MRP | <<locked>> | 88% | 55,288 psi | 87% | 2949 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,492 psi | 89% | 2864 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,578 psi | 86% | 2841 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,086 psi | 88% | 2966 fps | 99.9% |
| Ramshot Grand | <<locked>> | 90% | 53,983 psi | 85% | 2940 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 55,274 psi | 87% | 2871 fps | 100% |
| Ramshot Hunter | <<locked>> | 84% | 56,985 psi | 89% | 2900 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,418 psi | 85% | 2897 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,449 psi | 88% | 2930 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,319 psi | 60% | 1837 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,464 psi | 60% | 1850 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,520 psi | 85% | 2851 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,376 psi | 88% | 2884 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,884 psi | 89% | 2936 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,781 psi | 86% | 2910 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,925 psi | 85% | 3005 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,434 psi | 88% | 3048 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3031 fps | 99.5% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 55,637 psi | 87% | 3009 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 88% | 56,115 psi | 88% | 2861 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 88% | 57,711 psi | 90% | 2894 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 54,607 psi | 86% | 2877 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 88% | 56,318 psi | 88% | 2907 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 56,057 psi | 88% | 2825 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,624 psi | 90% | 2858 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,868 psi | 86% | 2792 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,376 psi | 88% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,768 psi | 89% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,795 psi | 86% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,493 psi | 90% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,317 psi | 87% | 2779 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,186 psi | 85% | 2871 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,912 psi | 88% | 2904 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 57,740 psi | 90% | 2858 fps | 99.4% |
| Somchem S361 | <<locked>> | 86% | 55,608 psi | 87% | 2835 fps | 99.3% |
| Somchem S365 | <<locked>> | 86% | 57,406 psi | 90% | 2864 fps | 100% |
| Somchem S365 | <<locked>> | 84% | 55,680 psi | 87% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,940 psi | 86% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,579 psi | 89% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,563 psi | 86% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,130 psi | 88% | 2831 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,694 psi | 86% | 2831 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,434 psi | 88% | 2861 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 56,927 psi | 89% | 2897 fps | 96.4% |
| Vihtavuori N170 | <<locked>> | 96% | 55,216 psi | 87% | 2881 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 84% | 57,188 psi | 90% | 2858 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 55,201 psi | 87% | 2835 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,116 psi | 90% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,622 psi | 87% | 2874 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,927 psi | 89% | 2979 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 88% | 54,911 psi | 86% | 2953 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 96% | 57,101 psi | 89% | 2963 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 94% | 55,448 psi | 87% | 2943 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 54,027 psi | 85% | 2966 fps | 98.7% |
| Vihtavuori N568 | <<locked>> | 98% | 56,434 psi | 88% | 3009 fps | 99.2% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 3025 fps | 97.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,435 psi | 90% | 3071 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,653 psi | 90% | 2808 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,448 psi | 87% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,014 psi | 88% | 2884 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 53,621 psi | 84% | 2949 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,260 psi | 88% | 2989 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,665 psi | 86% | 2841 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,391 psi | 88% | 2874 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% | 38,421 psi | 60% | 2543 fps | 99.4% |
| Accurate 3100 | <<locked>> | 80% | 39,697 psi | 62% | 2572 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 51,024 psi | 80% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 52,562 psi | 82% | 2805 fps | 100% |
| Accurate High Country | 64.4 gr | 80% | 41,814 psi | 66% | 2717 fps | 97.6% |
| Accurate High Country | 64.4 gr | 80% | 43,294 psi | 68% | 2753 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 80% | 39,479 psi | 62% | 2657 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 80% | 40,857 psi | 64% | 2690 fps | 96.2% |
| ADI AR 2209 | <<locked>> | 80% | 42,467 psi | 67% | 2667 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 80% | 43,729 psi | 69% | 2700 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 37,811 psi | 59% | 2602 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 80% | 39,117 psi | 61% | 2638 fps | 96.8% |
| ADI AR 2217 | <<locked>> | 86% | 34,447 psi | 54% | 2520 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 86% | 35,534 psi | 56% | 2552 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 98% | 45,992 psi | 72% | 2864 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 84% | 29,240 psi | 46% | 2425 fps | 96% |
| ADI AR 2225 | <<locked>> | 82% | 28,398 psi | 45% | 2402 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,830 psi | 67% | 2667 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,092 psi | 69% | 2700 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,733 psi | 76% | 2779 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,299 psi | 79% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,438 psi | 67% | 2661 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,685 psi | 68% | 2694 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,247 psi | 60% | 2612 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,697 psi | 62% | 2648 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,072 psi | 58% | 2566 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,450 psi | 60% | 2595 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,082 psi | 50% | 2493 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,185 psi | 52% | 2526 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,205 psi | 65% | 2720 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,815 psi | 67% | 2753 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 44,512 psi | 70% | 2818 fps | 95.1% |
| Alliant Reloder-33 | <<locked>> | 96% | 46,528 psi | 73% | 2864 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 45,266 psi | 71% | 2697 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 43,598 psi | 68% | 2671 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 35,636 psi | 56% | 2546 fps | 96.7% |
| Bofors RP15 | <<locked>> | 80% | 36,840 psi | 58% | 2582 fps | 97.3% |
| Bofors RP30 | <<locked>> | 84% | 33,837 psi | 53% | 2536 fps | 95.4% |
| Bofors RP30 | <<locked>> | 82% | 32,909 psi | 52% | 2513 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 38,247 psi | 60% | 2612 fps | 97.7% |
| Bofors RP5 | <<locked>> | 80% | 39,697 psi | 62% | 2648 fps | 98.2% |
| Bofors RP7 | <<locked>> | 80% | 52,837 psi | 83% | 2776 fps | 100% |
| Bofors RP7 | <<locked>> | 80% | 54,157 psi | 85% | 2805 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 32,779 psi | 51% | 2477 fps | 95.1% |
| Hodgdon H1000 | <<locked>> | 82% | 33,881 psi | 53% | 2513 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 52,286 psi | 82% | 2828 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 53,882 psi | 84% | 2858 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 40,350 psi | 63% | 2605 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 80% | 41,669 psi | 65% | 2641 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,610 psi | 62% | 2589 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,944 psi | 64% | 2625 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,905 psi | 72% | 2657 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,384 psi | 74% | 2687 fps | 100% |
| Hodgdon Retumbo | 62.1 gr | 80% | 31,256 psi | 49% | 2516 fps | 95.7% |
| Hodgdon Retumbo | 62.1 gr | 80% | 32,460 psi | 51% | 2556 fps | 96.5% |
| Hodgdon Superformance | <<locked>> | 80% | 52,562 psi | 82% | 2861 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 44% | 1604 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 44% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,211 psi | 76% | 2717 fps | 99.8% |
| IMR 4350 | <<locked>> | 80% | 49,487 psi | 78% | 2743 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,143 psi | 85% | 2799 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,269 psi | 76% | 2720 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,676 psi | 78% | 2746 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,945 psi | 66% | 2605 fps | 96.9% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,047 psi | 67% | 2635 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 36,492 psi | 57% | 2582 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 80% | 37,826 psi | 59% | 2618 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 92% | 34,490 psi | 54% | 2575 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 90% | 33,518 psi | 53% | 2549 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 51,735 psi | 81% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 53,055 psi | 83% | 2772 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,024 psi | 78% | 2740 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,372 psi | 81% | 2769 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,083 psi | 52% | 2421 fps | 98.3% |
| Lovex S071 | <<locked>> | 80% | 34,360 psi | 54% | 2454 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 48,486 psi | 76% | 2759 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 49,951 psi | 78% | 2792 fps | 99.6% |
| Norma 217 | <<locked>> | 88% | 30,284 psi | 47% | 2480 fps | 96% |
| Norma 217 | <<locked>> | 86% | 29,428 psi | 46% | 2457 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 40,350 psi | 63% | 2680 fps | 99.2% |
| Norma MRP | <<locked>> | 80% | 41,829 psi | 66% | 2713 fps | 99.5% |
| Norma URP | <<locked>> | 80% | 49,588 psi | 78% | 2759 fps | 100% |
| Norma URP | <<locked>> | 80% | 50,995 psi | 80% | 2785 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,260 psi | 57% | 2589 fps | 96.1% |
| Ramshot Grand | <<locked>> | 80% | 37,594 psi | 59% | 2625 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 80% | 48,399 psi | 76% | 2762 fps | 100% |
| Ramshot Hunter | <<locked>> | 80% | 49,908 psi | 78% | 2795 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,343 psi | 51% | 2470 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 80% | 33,562 psi | 53% | 2507 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 45% | 1644 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,877 psi | 45% | 1654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,879 psi | 80% | 2795 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,707 psi | 83% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,226 psi | 77% | 2822 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,850 psi | 80% | 2851 fps | 100% |
| ReloadSwiss RS 76 | 66.4 gr | 80% | 30,240 psi | 47% | 2487 fps | 96.5% |
| ReloadSwiss RS 76 | 66.4 gr | 80% | 31,401 psi | 49% | 2526 fps | 97.3% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 39,349 psi | 62% | 2703 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 38,043 psi | 60% | 2674 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 43,468 psi | 68% | 2641 fps | 97.8% |
| Rottweil R 904 | <<locked>> | 80% | 44,672 psi | 70% | 2671 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 80% | 41,814 psi | 66% | 2648 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 80% | 43,134 psi | 68% | 2680 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,837 psi | 83% | 2776 fps | 100% |
| Rottweil R 907 | <<locked>> | 80% | 54,157 psi | 85% | 2805 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,735 psi | 81% | 2746 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,055 psi | 83% | 2772 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,024 psi | 78% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,372 psi | 81% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,531 psi | 79% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,967 psi | 81% | 2726 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,481 psi | 65% | 2644 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,786 psi | 67% | 2677 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 44,309 psi | 69% | 2631 fps | 97.4% |
| Somchem S361 | <<locked>> | 80% | 45,484 psi | 71% | 2664 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 47,137 psi | 74% | 2717 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 48,675 psi | 76% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,308 psi | 66% | 2628 fps | 99.1% |
| Somchem S385 | <<locked>> | 80% | 43,714 psi | 69% | 2661 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 51,111 psi | 80% | 2749 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 52,518 psi | 82% | 2779 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,869 psi | 58% | 2507 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 80% | 38,014 psi | 60% | 2539 fps | 98.2% |
| Vihtavuori N170 | <<locked>> | 96% | 53,330 psi | 84% | 2841 fps | 95.6% |
| Vihtavuori N170 | <<locked>> | 94% | 51,634 psi | 81% | 2818 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 50,430 psi | 79% | 2759 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 51,909 psi | 81% | 2785 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,394 psi | 65% | 2638 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,830 psi | 67% | 2667 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,306 psi | 63% | 2671 fps | 96.5% |
| Vihtavuori N560 | <<locked>> | 80% | 41,727 psi | 65% | 2707 fps | 97.1% |
| Vihtavuori N565 | <<locked>> | 82% | 35,505 psi | 56% | 2549 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 82% | 36,999 psi | 58% | 2589 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 40,814 psi | 64% | 2720 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 88% | 39,537 psi | 62% | 2694 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 96% | 47,718 psi | 75% | 2894 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 94% | 46,369 psi | 73% | 2871 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,140 psi | 79% | 2703 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,677 psi | 81% | 2730 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,489 psi | 82% | 2828 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,750 psi | 53% | 2605 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,476 psi | 56% | 2641 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,696 psi | 61% | 2556 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,030 psi | 63% | 2589 fps | 98.2% |
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 144 powders for 7 x 66 SE v. Hofe loaded with the .284 | 171gr | Barnes Match Burner BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,074 fps; across all powders the maximum-charge window runs from 1,795 fps to 3,074 fps. ADI AR 2217 gives the best case fill at 100 %, and 144 of the 144 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. ADI AR 2217, ADI AR 2217, ADI AR 2218 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, Accurate High Country rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 171gr | Barnes Match Burner BT 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.