Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:150 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
Recommended Twist Rate:1:11.5
Load data in caliber 7 x 66 SE v. Hofe with .284 | 150gr | Barnes TTSX BT bullet and 152 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Alliant Reloder-26 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>> | 94% | 55,332 psi | 87% | 3015 fps | 100% |
| Accurate 3100 | <<locked>> | 94% | 55,259 psi | 87% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,521 psi | 89% | 3048 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,478 psi | 89% | 3048 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 57,072 psi | 89% | 3179 fps | 99.3% |
| Accurate High Country | <<locked>> | 92% | 57,029 psi | 89% | 3176 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 92% | 54,114 psi | 85% | 3114 fps | 98% |
| Accurate MAGPRO | <<locked>> | 92% | 54,056 psi | 85% | 3114 fps | 98% |
| ADI AR 2208 | <<locked>> | 82% | 57,580 psi | 90% | 3009 fps | 100% |
| ADI AR 2208 | <<locked>> | 82% | 57,551 psi | 90% | 3009 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,609 psi | 90% | 3114 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 53,882 psi | 84% | 3054 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 55,550 psi | 87% | 3120 fps | 99% |
| ADI AR 2213 | <<locked>> | 94% | 55,506 psi | 87% | 3120 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,763 psi | 78% | 3012 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,719 psi | 78% | 3012 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,179 psi | 69% | 2966 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,324 psi | 69% | 2966 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,186 psi | 85% | 3051 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,143 psi | 85% | 3051 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,128 psi | 85% | 3054 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,085 psi | 85% | 3054 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,998 psi | 86% | 3064 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,969 psi | 86% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,058 psi | 89% | 3100 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,246 psi | 90% | 3104 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,521 psi | 87% | 3117 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,448 psi | 87% | 3114 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,652 psi | 89% | 3081 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,608 psi | 89% | 3081 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3146 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,130 psi | 88% | 3146 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,464 psi | 90% | 3179 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,421 psi | 90% | 3176 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,130 psi | 90% | 3077 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,319 psi | 90% | 3077 fps | 96.9% |
| Bofors RP15 | <<locked>> | 96% | 54,447 psi | 85% | 3097 fps | 99.5% |
| Bofors RP15 | <<locked>> | 96% | 54,389 psi | 85% | 3094 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,953 psi | 81% | 3081 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 3081 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 55,521 psi | 87% | 3117 fps | 99.7% |
| Bofors RP5 | <<locked>> | 94% | 55,448 psi | 87% | 3114 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 55,361 psi | 87% | 2995 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 55,317 psi | 87% | 2999 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,056 psi | 86% | 3107 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3107 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 54,795 psi | 86% | 3054 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 54,752 psi | 86% | 3051 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 57,435 psi | 90% | 3068 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 57,406 psi | 90% | 3068 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 55,405 psi | 87% | 3058 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 92% | 55,376 psi | 87% | 3054 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,215 psi | 85% | 3035 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,172 psi | 85% | 3035 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,186 psi | 85% | 2972 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,375 psi | 85% | 2976 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,955 psi | 86% | 3225 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,143 psi | 86% | 3225 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,187 psi | 86% | 3091 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 55,143 psi | 86% | 3087 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 58% | 1916 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1916 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,145 psi | 90% | 3038 fps | 99.9% |
| IMR 4350 | <<locked>> | 88% | 57,087 psi | 89% | 3038 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,869 psi | 89% | 3022 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,855 psi | 89% | 3022 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,956 psi | 89% | 3041 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,884 psi | 89% | 3041 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,202 psi | 88% | 3035 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,420 psi | 88% | 3041 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 96% | 57,087 psi | 89% | 3156 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 96% | 57,305 psi | 90% | 3163 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 57,435 psi | 90% | 3018 fps | 100% |
| Lovex S065 | <<locked>> | 86% | 57,421 psi | 90% | 3018 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,593 psi | 87% | 3015 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,535 psi | 87% | 3015 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,304 psi | 88% | 3028 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,275 psi | 88% | 3031 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,520 psi | 85% | 3038 fps | 99.4% |
| Norma 204 | <<locked>> | 86% | 54,476 psi | 85% | 3041 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 39,624 psi | 62% | 2881 fps | 98.1% |
| Norma 217ᴾ | <<locked>> | 100% | 39,784 psi | 62% | 2884 fps | 98.2% |
| Norma MRP | <<locked>> | 92% | 55,274 psi | 87% | 3136 fps | 100% |
| Norma MRP | <<locked>> | 92% | 55,216 psi | 87% | 3133 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,114 psi | 86% | 3035 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,056 psi | 86% | 3031 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,940 psi | 85% | 3114 fps | 99.1% |
| Ramshot Grand | <<locked>> | 94% | 53,925 psi | 85% | 3114 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 54,070 psi | 85% | 3038 fps | 100% |
| Ramshot Hunter | <<locked>> | 86% | 54,012 psi | 85% | 3038 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,637 psi | 89% | 3110 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,550 psi | 89% | 3110 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1962 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1962 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,811 psi | 89% | 3074 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,797 psi | 89% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,158 psi | 86% | 3104 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,390 psi | 87% | 3107 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3222 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 3222 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,531 psi | 79% | 3094 fps | 97.6% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 3097 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 56,449 psi | 88% | 2992 fps | 100% |
| Rottweil R 903 | <<locked>> | 82% | 56,637 psi | 89% | 2992 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,100 psi | 86% | 3022 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 90% | 55,042 psi | 86% | 3022 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 56,637 psi | 89% | 3091 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 92% | 56,565 psi | 89% | 3091 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 55,361 psi | 87% | 2995 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 55,317 psi | 87% | 2999 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,435 psi | 90% | 3018 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,421 psi | 90% | 3018 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,593 psi | 87% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,535 psi | 87% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,449 psi | 88% | 2858 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,420 psi | 88% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,782 psi | 89% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,753 psi | 89% | 2972 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,202 psi | 88% | 3084 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,130 psi | 88% | 3084 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 56,318 psi | 88% | 2989 fps | 100% |
| Somchem S355 | <<locked>> | 82% | 56,289 psi | 88% | 2986 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,652 psi | 89% | 3015 fps | 98.6% |
| Somchem S361 | <<locked>> | 90% | 56,594 psi | 89% | 3012 fps | 98.6% |
| Somchem S365 | <<locked>> | 88% | 55,622 psi | 87% | 3035 fps | 100% |
| Somchem S365 | <<locked>> | 88% | 55,579 psi | 87% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,014 psi | 89% | 3058 fps | 99.9% |
| Somchem S385 | <<locked>> | 92% | 56,956 psi | 89% | 3058 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 57,638 psi | 90% | 2956 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 57,580 psi | 90% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,869 psi | 89% | 3025 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,840 psi | 89% | 3025 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,681 psi | 89% | 3038 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 96% | 56,608 psi | 89% | 3038 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 56,159 psi | 88% | 3031 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 56,101 psi | 88% | 3031 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,940 psi | 86% | 3054 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,129 psi | 86% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,100 psi | 86% | 3130 fps | 98.6% |
| Vihtavuori N560 | <<locked>> | 92% | 55,042 psi | 86% | 3130 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 98% | 54,868 psi | 86% | 3107 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 98% | 54,824 psi | 86% | 3107 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,808 psi | 81% | 3104 fps | 97.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,779 psi | 81% | 3104 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,666 psi | 89% | 2979 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,637 psi | 89% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,795 psi | 86% | 3054 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,984 psi | 86% | 3054 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,549 psi | 85% | 3166 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,766 psi | 86% | 3166 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,116 psi | 90% | 3058 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,305 psi | 90% | 3058 fps | 99.7% |
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% | 33,997 psi | 53% | 2602 fps | 97.4% |
| Accurate 3100 | <<locked>> | 80% | 33,953 psi | 53% | 2602 fps | 97.4% |
| Accurate 4350 | <<locked>> | 80% | 45,919 psi | 72% | 2874 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 45,876 psi | 72% | 2874 fps | 100% |
| Accurate High Country | 66 gr | 82% | 39,958 psi | 63% | 2841 fps | 95.6% |
| Accurate High Country | 66 gr | 82% | 39,929 psi | 63% | 2841 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 86% | 43,555 psi | 68% | 2910 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 86% | 43,540 psi | 68% | 2910 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 54,099 psi | 85% | 2956 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 54,056 psi | 85% | 2953 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,261 psi | 60% | 2740 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 80% | 38,406 psi | 60% | 2743 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 39,262 psi | 62% | 2792 fps | 95% |
| ADI AR 2213 | <<locked>> | 84% | 39,218 psi | 61% | 2792 fps | 95% |
| ADI AR 2217 | <<locked>> | 94% | 40,451 psi | 63% | 2818 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 94% | 40,408 psi | 63% | 2815 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 31,691 psi | 50% | 2641 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 90% | 31,647 psi | 50% | 2641 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,769 psi | 61% | 2746 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,740 psi | 61% | 2746 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,237 psi | 69% | 2884 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,193 psi | 69% | 2884 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,227 psi | 80% | 3009 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,169 psi | 80% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,421 psi | 60% | 2740 fps | 96.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,377 psi | 60% | 2740 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,579 psi | 57% | 2733 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,550 psi | 57% | 2733 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,721 psi | 51% | 2635 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,866 psi | 52% | 2635 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,384 psi | 44% | 2530 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,514 psi | 45% | 2533 fps | 95.7% |
| Alliant Reloder-26 | 66.3 gr | 80% | 35,969 psi | 56% | 2779 fps | 99.2% |
| Alliant Reloder-26 | 66.3 gr | 80% | 35,955 psi | 56% | 2776 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,459 psi | 79% | 2956 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,444 psi | 79% | 2956 fps | 95.3% |
| Bofors RP15 | <<locked>> | 84% | 36,448 psi | 57% | 2730 fps | 95.5% |
| Bofors RP15 | <<locked>> | 84% | 36,405 psi | 57% | 2726 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 39,175 psi | 61% | 2825 fps | 95.9% |
| Bofors RP30 | <<locked>> | 92% | 39,334 psi | 62% | 2828 fps | 95.9% |
| Bofors RP5 | <<locked>> | 82% | 36,579 psi | 57% | 2733 fps | 95.7% |
| Bofors RP5 | <<locked>> | 82% | 36,550 psi | 57% | 2733 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 48,544 psi | 76% | 2881 fps | 99.3% |
| Bofors RP7 | <<locked>> | 80% | 48,718 psi | 76% | 2884 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 38,682 psi | 61% | 2779 fps | 95.9% |
| Hodgdon H1000 | <<locked>> | 90% | 38,667 psi | 61% | 2776 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 47,761 psi | 75% | 2930 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 47,747 psi | 75% | 2930 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 50,444 psi | 79% | 2949 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 50,386 psi | 79% | 2949 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 41,959 psi | 66% | 2802 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 84% | 41,916 psi | 66% | 2799 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,205 psi | 65% | 2785 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,191 psi | 65% | 2785 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,597 psi | 65% | 2762 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,582 psi | 65% | 2759 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,055 psi | 53% | 2746 fps | 95.2% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,055 psi | 53% | 2746 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 47,543 psi | 75% | 2956 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 80% | 47,485 psi | 74% | 2956 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 43% | 1716 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 43% | 1713 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,063 psi | 69% | 2808 fps | 98.6% |
| IMR 4350 | <<locked>> | 80% | 44,222 psi | 69% | 2812 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,024 psi | 78% | 2907 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,227 psi | 79% | 2910 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 43,729 psi | 69% | 2818 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 43,700 psi | 68% | 2818 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,872 psi | 64% | 2743 fps | 95.2% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,857 psi | 64% | 2743 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 86% | 40,364 psi | 63% | 2835 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 86% | 40,350 psi | 63% | 2831 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 47,427 psi | 74% | 2851 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 47,601 psi | 75% | 2854 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,788 psi | 72% | 2841 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 45,774 psi | 72% | 2841 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 29,051 psi | 46% | 2467 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 29,182 psi | 46% | 2470 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 44,222 psi | 69% | 2848 fps | 97.7% |
| Norma 204 | <<locked>> | 80% | 44,208 psi | 69% | 2851 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 32,300 psi | 51% | 2687 fps | 95.2% |
| Norma 217 | <<locked>> | 94% | 32,256 psi | 51% | 2687 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 35,766 psi | 56% | 2743 fps | 96.9% |
| Norma MRP | <<locked>> | 80% | 35,752 psi | 56% | 2743 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 45,107 psi | 71% | 2861 fps | 100% |
| Norma URP | <<locked>> | 80% | 45,078 psi | 71% | 2861 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 40,045 psi | 63% | 2838 fps | 95.9% |
| Ramshot Grand | <<locked>> | 86% | 40,030 psi | 63% | 2838 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 44,034 psi | 69% | 2858 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 80% | 44,019 psi | 69% | 2858 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 33,141 psi | 52% | 2641 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 84% | 33,112 psi | 52% | 2641 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 1755 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 1755 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,905 psi | 72% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,079 psi | 72% | 2897 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,295 psi | 69% | 2917 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,266 psi | 69% | 2913 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,243 psi | 52% | 2720 fps | 96.2% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,228 psi | 52% | 2720 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,308 psi | 68% | 2949 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,265 psi | 68% | 2946 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 52,910 psi | 83% | 2936 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 52,852 psi | 83% | 2936 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,682 psi | 62% | 2723 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 39,668 psi | 62% | 2723 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 37,594 psi | 59% | 2720 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 80% | 37,565 psi | 59% | 2720 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 48,544 psi | 76% | 2881 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 80% | 48,718 psi | 76% | 2884 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,427 psi | 74% | 2851 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,601 psi | 75% | 2854 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,788 psi | 72% | 2841 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 45,774 psi | 72% | 2841 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,953 psi | 83% | 2812 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,142 psi | 83% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,456 psi | 73% | 2799 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,441 psi | 73% | 2799 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,275 psi | 58% | 2713 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,246 psi | 58% | 2713 fps | 96% |
| Somchem S355 | <<locked>> | 80% | 52,663 psi | 83% | 2933 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 52,852 psi | 83% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,163 psi | 68% | 2772 fps | 95.7% |
| Somchem S361 | <<locked>> | 82% | 43,308 psi | 68% | 2772 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 42,018 psi | 66% | 2812 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 42,192 psi | 66% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,203 psi | 60% | 2707 fps | 97.2% |
| Somchem S385 | <<locked>> | 80% | 38,174 psi | 60% | 2703 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 50,502 psi | 79% | 2854 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 50,473 psi | 79% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,630 psi | 73% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,586 psi | 73% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,302 psi | 55% | 2628 fps | 95.9% |
| Vihtavuori N165 | <<locked>> | 82% | 35,433 psi | 56% | 2631 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 45,847 psi | 72% | 2861 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 45,818 psi | 72% | 2858 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,796 psi | 58% | 2713 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 36,782 psi | 58% | 2713 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 41,553 psi | 65% | 2864 fps | 95.4% |
| Vihtavuori N560 | <<locked>> | 84% | 41,495 psi | 65% | 2864 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 90% | 41,568 psi | 65% | 2851 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 90% | 41,524 psi | 65% | 2851 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 44,628 psi | 70% | 2963 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 96% | 44,788 psi | 70% | 2966 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,847 psi | 72% | 2815 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,818 psi | 72% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,979 psi | 75% | 2933 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 47,921 psi | 75% | 2933 fps | 99.5% |
| Winchester StaBALL HD | 63.7 gr | 80% | 29,022 psi | 45% | 2648 fps | 99.8% |
| Winchester StaBALL HD | 63.7 gr | 80% | 28,993 psi | 45% | 2648 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,838 psi | 55% | 2625 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,434 psi | 59% | 2684 fps | 96% |
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 152 powders for 7 x 66 SE v. Hofe loaded with the .284 | 150gr | Barnes TTSX BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,225 fps; across all powders the maximum-charge window runs from 1,916 fps to 3,225 fps. ADI AR 2217 gives the best case fill at 100 %, and 152 of the 152 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 150.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2217, 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. Accurate High Country, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 150gr | Barnes TTSX 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.