Load Specifications
Bullet:.284 | 120gr | Barnes TSX BT
Bullet Manufacturer:Barnes
Bullet Weight:120 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 | 120gr | Barnes TSX BT bullet and 176 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and ReloadSwiss RS 70.
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 2495 | <<locked>> | 82% | 57,116 psi | 90% | 3222 fps | 100% |
| Accurate 2495 | <<locked>> | 82% | 57,058 psi | 89% | 3219 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 55,143 psi | 86% | 3248 fps | 98.6% |
| Accurate 2700 | <<locked>> | 82% | 54,955 psi | 86% | 3245 fps | 98.6% |
| Accurate 3100 | <<locked>> | 98% | 54,201 psi | 85% | 3294 fps | 99.6% |
| Accurate 3100 | <<locked>> | 98% | 54,056 psi | 85% | 3287 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 54,114 psi | 85% | 3228 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 57,580 psi | 90% | 3284 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,956 psi | 88% | 3353 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,680 psi | 87% | 3346 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 55,811 psi | 87% | 3451 fps | 97.4% |
| Accurate High Country | <<locked>> | 96% | 55,608 psi | 87% | 3448 fps | 97.4% |
| Accurate MAGPRO | <<locked>> | 98% | 57,058 psi | 89% | 3455 fps | 96.4% |
| Accurate MAGPRO | <<locked>> | 98% | 56,681 psi | 89% | 3448 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 54,578 psi | 86% | 3274 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 54,360 psi | 85% | 3268 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,246 psi | 90% | 3406 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 96% | 57,043 psi | 89% | 3402 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 55,114 psi | 86% | 3399 fps | 97% |
| ADI AR 2213 | <<locked>> | 98% | 54,694 psi | 86% | 3389 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 57,348 psi | 90% | 3399 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 57,159 psi | 90% | 3396 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,579 psi | 87% | 3297 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,332 psi | 87% | 3294 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,666 psi | 87% | 3323 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,419 psi | 87% | 3320 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,956 psi | 89% | 3422 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,478 psi | 89% | 3415 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,331 psi | 85% | 3379 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,099 psi | 85% | 3373 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,579 psi | 89% | 3389 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,376 psi | 88% | 3386 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,404 psi | 85% | 3392 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,983 psi | 85% | 3383 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,056 psi | 86% | 3373 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3366 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,616 psi | 75% | 3294 fps | 99.5% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,268 psi | 74% | 3284 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,521 psi | 87% | 3468 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,071 psi | 86% | 3458 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3363 fps | 97.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 3360 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 56,449 psi | 88% | 3314 fps | 100% |
| Bofors RP3 | <<locked>> | 84% | 55,956 psi | 88% | 3307 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,404 psi | 85% | 3392 fps | 98.2% |
| Bofors RP5 | <<locked>> | 98% | 53,983 psi | 85% | 3383 fps | 98.1% |
| Bofors RP7 | <<locked>> | 88% | 55,651 psi | 87% | 3297 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 55,463 psi | 87% | 3294 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 56,782 psi | 89% | 3337 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 56,507 psi | 89% | 3327 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,389 psi | 85% | 3350 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 88% | 54,201 psi | 85% | 3343 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 57,696 psi | 90% | 3373 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 88% | 57,217 psi | 90% | 3360 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 96% | 54,969 psi | 86% | 3330 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 96% | 54,766 psi | 86% | 3327 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,969 psi | 85% | 3310 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,479 psi | 90% | 3373 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,174 psi | 90% | 3330 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,971 psi | 89% | 3327 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,485 psi | 73% | 3327 fps | 97.2% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,325 psi | 73% | 3323 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 88% | 55,056 psi | 86% | 3386 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 88% | 54,650 psi | 86% | 3379 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 57% | 2129 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 57% | 2123 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,464 psi | 90% | 3310 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,232 psi | 90% | 3307 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,434 psi | 88% | 3291 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,217 psi | 88% | 3287 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 57,217 psi | 90% | 3337 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 56,797 psi | 89% | 3327 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,508 psi | 90% | 3333 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,058 psi | 89% | 3323 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 56,434 psi | 88% | 3343 fps | 100% |
| IMR 4831 | <<locked>> | 92% | 56,231 psi | 88% | 3340 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,116 psi | 90% | 3353 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,869 psi | 89% | 3350 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,376 psi | 88% | 3320 fps | 96.8% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,231 psi | 88% | 3314 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,188 psi | 88% | 3432 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,028 psi | 88% | 3425 fps | 97.3% |
| Lovex S062 | <<locked>> | 84% | 57,551 psi | 90% | 3301 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,305 psi | 90% | 3297 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,479 psi | 90% | 3323 fps | 99.9% |
| Lovex S065 | <<locked>> | 90% | 57,290 psi | 90% | 3317 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,492 psi | 87% | 3310 fps | 99.3% |
| Lovex S070 | <<locked>> | 90% | 55,317 psi | 87% | 3307 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,051 psi | 75% | 3182 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,630 psi | 75% | 3173 fps | 98.8% |
| Norma 203B | <<locked>> | 82% | 54,969 psi | 86% | 3307 fps | 100% |
| Norma 203B | <<locked>> | 82% | 54,723 psi | 86% | 3301 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,433 psi | 85% | 3327 fps | 97.8% |
| Norma 204 | <<locked>> | 90% | 54,244 psi | 85% | 3323 fps | 97.7% |
| Norma MRP | <<locked>> | 96% | 53,954 psi | 85% | 3415 fps | 99.1% |
| Norma MRP | <<locked>> | 98% | 57,725 psi | 90% | 3481 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 54,607 psi | 86% | 3337 fps | 100% |
| Norma URP | <<locked>> | 90% | 54,360 psi | 85% | 3330 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,014 psi | 88% | 3330 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,796 psi | 87% | 3327 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,956 psi | 89% | 3451 fps | 97.8% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,782 psi | 89% | 3451 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 57,305 psi | 90% | 3396 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 92% | 57,101 psi | 89% | 3392 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,169 psi | 80% | 3307 fps | 98.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,807 psi | 80% | 3297 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,101 psi | 58% | 2178 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,941 psi | 58% | 2172 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,594 psi | 89% | 3314 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,405 psi | 88% | 3310 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,838 psi | 84% | 3373 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,551 psi | 90% | 3432 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,144 psi | 88% | 3376 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,724 psi | 87% | 3369 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,592 psi | 86% | 3409 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,389 psi | 85% | 3402 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,920 psi | 74% | 3323 fps | 98.4% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,601 psi | 73% | 3314 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,811 psi | 87% | 3258 fps | 100% |
| Rottweil R 902 | <<locked>> | 82% | 55,550 psi | 87% | 3251 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,507 psi | 89% | 3307 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,275 psi | 88% | 3304 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,042 psi | 86% | 3307 fps | 97% |
| Rottweil R 904 | <<locked>> | 94% | 54,868 psi | 86% | 3304 fps | 97% |
| Rottweil R 905 | <<locked>> | 96% | 55,985 psi | 88% | 3376 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 96% | 55,535 psi | 87% | 3366 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 55,651 psi | 87% | 3297 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 88% | 55,463 psi | 87% | 3294 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,479 psi | 90% | 3323 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,290 psi | 90% | 3317 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 57,551 psi | 90% | 3301 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,305 psi | 90% | 3297 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,492 psi | 87% | 3310 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 55,317 psi | 87% | 3307 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,650 psi | 86% | 3317 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,418 psi | 85% | 3310 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,101 psi | 89% | 3179 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,869 psi | 89% | 3176 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,232 psi | 90% | 3271 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,014 psi | 89% | 3264 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,535 psi | 87% | 3373 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,085 psi | 86% | 3363 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 56,217 psi | 88% | 3304 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 55,985 psi | 88% | 3301 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,014 psi | 89% | 3297 fps | 96.7% |
| Somchem S361 | <<locked>> | 94% | 56,637 psi | 89% | 3287 fps | 96.6% |
| Somchem S365 | <<locked>> | 92% | 54,462 psi | 85% | 3340 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 53,954 psi | 85% | 3330 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,565 psi | 89% | 3346 fps | 99% |
| Somchem S385 | <<locked>> | 96% | 56,144 psi | 88% | 3337 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 56,333 psi | 88% | 3212 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 56,028 psi | 88% | 3205 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,855 psi | 89% | 3228 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,608 psi | 89% | 3225 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,259 psi | 85% | 3219 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,551 psi | 90% | 3271 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,739 psi | 89% | 3330 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,521 psi | 89% | 3327 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 3317 fps | 98.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,637 psi | 87% | 3307 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 55,056 psi | 86% | 3222 fps | 100% |
| Vihtavuori N540 | <<locked>> | 82% | 54,839 psi | 86% | 3215 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,767 psi | 87% | 3333 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,579 psi | 87% | 3327 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,290 psi | 90% | 3402 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,811 psi | 89% | 3396 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,056 psi | 85% | 3402 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 96% | 53,882 psi | 84% | 3399 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,695 psi | 89% | 3287 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,304 psi | 88% | 3281 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,621 psi | 86% | 3353 fps | 99.2% |
| Winchester 760 | <<locked>> | 88% | 54,433 psi | 85% | 3346 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,358 psi | 80% | 3445 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,894 psi | 80% | 3442 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,927 psi | 89% | 3340 fps | 98.4% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,550 psi | 89% | 3333 fps | 98.3% |
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 2495 | <<locked>> | 80% | 53,548 psi | 84% | 3169 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 53,243 psi | 83% | 3163 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,430 psi | 81% | 3179 fps | 98% |
| Accurate 2700 | <<locked>> | 80% | 51,227 psi | 80% | 3176 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 35,360 psi | 55% | 2894 fps | 95.5% |
| Accurate 3100 | <<locked>> | 86% | 35,186 psi | 55% | 2890 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 50,763 psi | 80% | 3176 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 50,488 psi | 79% | 3169 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,160 psi | 61% | 3018 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 38,914 psi | 61% | 3012 fps | 98.2% |
| Accurate High Country | <<locked>> | 92% | 48,254 psi | 76% | 3304 fps | 95.6% |
| Accurate High Country | <<locked>> | 92% | 48,037 psi | 75% | 3301 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 96% | 52,953 psi | 83% | 3376 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 96% | 52,562 psi | 82% | 3369 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 48,022 psi | 75% | 3153 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 47,776 psi | 75% | 3146 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 43,555 psi | 68% | 3130 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 88% | 43,366 psi | 68% | 3127 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 94% | 47,906 psi | 75% | 3251 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 96% | 50,995 psi | 80% | 3317 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,816 psi | 69% | 3133 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,627 psi | 68% | 3127 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,588 psi | 76% | 3176 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,559 psi | 76% | 3176 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,069 psi | 82% | 3258 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,822 psi | 81% | 3255 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,956 psi | 59% | 3031 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,739 psi | 59% | 3025 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,685 psi | 68% | 3182 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,468 psi | 68% | 3173 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,337 psi | 68% | 3123 fps | 95.3% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,134 psi | 68% | 3120 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 44,092 psi | 69% | 3182 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,714 psi | 69% | 3173 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,731 psi | 43% | 2733 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,543 psi | 43% | 2726 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,968 psi | 53% | 2943 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,794 psi | 53% | 2940 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 82% | 32,198 psi | 50% | 2930 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 82% | 32,039 psi | 50% | 2927 fps | 95.4% |
| Bofors RP15 | <<locked>> | 94% | 43,279 psi | 68% | 3163 fps | 95.3% |
| Bofors RP15 | <<locked>> | 94% | 43,105 psi | 68% | 3156 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 49,211 psi | 77% | 3192 fps | 100% |
| Bofors RP3 | <<locked>> | 80% | 48,965 psi | 77% | 3186 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 44,092 psi | 69% | 3182 fps | 95.7% |
| Bofors RP5 | <<locked>> | 92% | 43,714 psi | 69% | 3173 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 42,931 psi | 67% | 3041 fps | 96.3% |
| Bofors RP7 | <<locked>> | 80% | 42,743 psi | 67% | 3035 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 49,400 psi | 77% | 3202 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 49,168 psi | 77% | 3196 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 41,220 psi | 65% | 3074 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 80% | 41,002 psi | 64% | 3068 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 44,193 psi | 69% | 3104 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 43,990 psi | 69% | 3097 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 94% | 51,213 psi | 80% | 3261 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 94% | 51,053 psi | 80% | 3255 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 50,314 psi | 79% | 3241 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,937 psi | 78% | 3235 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,491 psi | 56% | 2907 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,273 psi | 55% | 2900 fps | 98.8% |
| Hodgdon Retumbo | <<locked>> | 98% | 43,381 psi | 68% | 3251 fps | 96.1% |
| Hodgdon Retumbo | <<locked>> | 98% | 43,250 psi | 68% | 3248 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 40,524 psi | 64% | 3084 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 40,176 psi | 63% | 3077 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1906 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,064 psi | 42% | 1903 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,473 psi | 79% | 3192 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,241 psi | 79% | 3186 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,881 psi | 83% | 3228 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,663 psi | 83% | 3222 fps | 98.8% |
| IMR 4350 | <<locked>> | 82% | 41,292 psi | 65% | 3018 fps | 95.8% |
| IMR 4350 | <<locked>> | 82% | 41,089 psi | 64% | 3012 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,469 psi | 70% | 3077 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,251 psi | 69% | 3074 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 37,594 psi | 59% | 2966 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 37,405 psi | 59% | 2959 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 53,447 psi | 84% | 3294 fps | 100% |
| IMR 4895 | <<locked>> | 80% | 53,185 psi | 83% | 3287 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,617 psi | 78% | 3192 fps | 95.2% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,284 psi | 77% | 3186 fps | 95% |
| IMR 7828 SSC | <<locked>> | 96% | 48,994 psi | 77% | 3287 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 96% | 48,602 psi | 76% | 3281 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 50,807 psi | 80% | 3189 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,546 psi | 79% | 3182 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,843 psi | 66% | 3018 fps | 97.8% |
| Lovex S065 | <<locked>> | 80% | 41,626 psi | 65% | 3012 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 40,103 psi | 63% | 2992 fps | 96.3% |
| Lovex S070 | <<locked>> | 80% | 39,885 psi | 63% | 2989 fps | 96.2% |
| Lovex S071 | <<locked>> | 90% | 34,272 psi | 54% | 2864 fps | 95% |
| Lovex S071 | <<locked>> | 92% | 36,492 psi | 57% | 2923 fps | 95.9% |
| Norma 203B | <<locked>> | 80% | 51,430 psi | 81% | 3245 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,184 psi | 80% | 3238 fps | 100% |
| Norma 204 | <<locked>> | 84% | 44,077 psi | 69% | 3120 fps | 95.3% |
| Norma 204 | <<locked>> | 84% | 43,903 psi | 69% | 3117 fps | 95.2% |
| Norma MRP | 72.3 gr | 88% | 40,205 psi | 63% | 3123 fps | 96% |
| Norma MRP | 72.3 gr | 88% | 40,030 psi | 63% | 3117 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 38,914 psi | 61% | 3015 fps | 98.1% |
| Norma URP | <<locked>> | 80% | 38,711 psi | 61% | 3009 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 80% | 52,214 psi | 82% | 3268 fps | 100% |
| Ramshot Big Game | <<locked>> | 80% | 51,967 psi | 81% | 3261 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 49,153 psi | 77% | 3301 fps | 96% |
| Ramshot Grand | <<locked>> | 96% | 48,762 psi | 76% | 3291 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 37,782 psi | 59% | 2992 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 37,594 psi | 59% | 2986 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 94% | 40,625 psi | 64% | 3077 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 94% | 40,306 psi | 63% | 3068 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,543 psi | 43% | 1952 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,528 psi | 43% | 1949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,472 psi | 78% | 3186 fps | 98.8% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,269 psi | 77% | 3179 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,485 psi | 73% | 3245 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,195 psi | 72% | 3238 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,131 psi | 61% | 3035 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,899 psi | 61% | 3028 fps | 97.9% |
| ReloadSwiss RS 70 | 67.1 gr | 80% | 37,913 psi | 59% | 3045 fps | 97.4% |
| ReloadSwiss RS 70 | 67.1 gr | 80% | 37,739 psi | 59% | 3041 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 40,393 psi | 63% | 3159 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 40,118 psi | 63% | 3153 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,402 psi | 82% | 3202 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 52,170 psi | 82% | 3196 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,195 psi | 72% | 3130 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,934 psi | 72% | 3123 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 48,283 psi | 76% | 3176 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 90% | 48,080 psi | 75% | 3173 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 88% | 42,453 psi | 67% | 3100 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 42,264 psi | 66% | 3097 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 42,931 psi | 67% | 3041 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 42,743 psi | 67% | 3035 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,843 psi | 66% | 3018 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,626 psi | 65% | 3012 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 50,807 psi | 80% | 3189 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 50,546 psi | 79% | 3182 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,103 psi | 63% | 2992 fps | 96.3% |
| Shooters World SW4350 | <<locked>> | 80% | 39,885 psi | 63% | 2989 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,601 psi | 75% | 3189 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,369 psi | 74% | 3182 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,195 psi | 74% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,152 psi | 74% | 3022 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,959 psi | 64% | 2953 fps | 96.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,756 psi | 64% | 2946 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,076 psi | 66% | 3097 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,887 psi | 66% | 3094 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 46,369 psi | 73% | 3127 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,151 psi | 72% | 3120 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,171 psi | 83% | 3228 fps | 95.9% |
| Somchem S361 | <<locked>> | 92% | 53,026 psi | 83% | 3225 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 35,346 psi | 55% | 2959 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 35,099 psi | 55% | 2953 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 40,248 psi | 63% | 3018 fps | 95.4% |
| Somchem S385 | <<locked>> | 86% | 39,885 psi | 63% | 3009 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 52,823 psi | 83% | 3159 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,765 psi | 83% | 3156 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,214 psi | 83% | 3176 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,968 psi | 83% | 3169 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,382 psi | 70% | 3045 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,193 psi | 69% | 3041 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,379 psi | 63% | 3015 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 80% | 40,176 psi | 63% | 3012 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 42,641 psi | 67% | 3058 fps | 95.8% |
| Vihtavuori N165 | <<locked>> | 92% | 42,264 psi | 66% | 3048 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 51,372 psi | 81% | 3163 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 51,140 psi | 80% | 3159 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,697 psi | 62% | 3009 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 80% | 39,494 psi | 62% | 3005 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 30,705 psi | 48% | 2822 fps | 96% |
| Vihtavuori N555 | <<locked>> | 80% | 30,487 psi | 48% | 2812 fps | 95.8% |
| Vihtavuori N560 | 77.2 gr | 94% | 50,415 psi | 79% | 3330 fps | 95.5% |
| Vihtavuori N560 | 77.2 gr | 94% | 50,038 psi | 78% | 3323 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,639 psi | 62% | 2979 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,479 psi | 62% | 2976 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 41,394 psi | 65% | 3077 fps | 96.4% |
| Winchester 760 | <<locked>> | 80% | 41,162 psi | 65% | 3071 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,237 psi | 41% | 2762 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,107 psi | 41% | 2756 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,598 psi | 67% | 3064 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,438 psi | 67% | 3061 fps | 95% |
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 176 powders for 7 x 66 SE v. Hofe loaded with the .284 | 120gr | Barnes TSX BT. Norma MRP delivers the highest muzzle velocity at 3,481 fps; across all powders the maximum-charge window runs from 2,123 fps to 3,481 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 176 of the 176 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-23, Alliant Reloder-25 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. Norma MRP, Vihtavuori N560, ReloadSwiss RS 70 rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 120gr | Barnes TSX 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.