Load Specifications
Bullet:.277 | 100gr | Barnes Solid
Bullet Manufacturer:Barnes
Bullet Weight:100 gr
Bullet Diameter:0.277"
Bullet Length:<<locked>>
Case Length (l3):2.54"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:70 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:72,519 psi
Recommended Twist Rate:1:11.0
Load data in caliber .270 Win. Ackley Improved with .277 | 100gr | Barnes Solid bullet and 111 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon LEVERevolution.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 63,222 psi | 87% | 3343 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 62,888 psi | 87% | 3471 fps | 99.4% |
| Accurate 2230 | <<locked>> | 82% | 65,224 psi | 90% | 3491 fps | 99.8% |
| Accurate 2460 | <<locked>> | 86% | 62,192 psi | 86% | 3379 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 62,033 psi | 86% | 3363 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 63,019 psi | 87% | 3432 fps | 100% |
| Accurate 2700 | <<locked>> | 98% | 63,309 psi | 87% | 3353 fps | 96.4% |
| Accurate 4064 | <<locked>> | 96% | 61,772 psi | 85% | 3412 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,114 psi | 75% | 3363 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 86% | 65,253 psi | 90% | 3333 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 61,975 psi | 85% | 3317 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 65,572 psi | 90% | 2697 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 62,395 psi | 86% | 3455 fps | 99.8% |
| ADI AR 2207 | <<locked>> | 82% | 63,469 psi | 88% | 3301 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 63,483 psi | 88% | 3445 fps | 99.6% |
| ADI AR 2219 | <<locked>> | 84% | 64,034 psi | 88% | 3428 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 65,224 psi | 90% | 3458 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 62,308 psi | 86% | 3379 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 63,048 psi | 87% | 3593 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 63,599 psi | 88% | 3471 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 62,468 psi | 86% | 3356 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 64,266 psi | 89% | 3494 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,214 psi | 72% | 3366 fps | 98.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 61,496 psi | 85% | 3550 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 82% | 64,745 psi | 89% | 3330 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 65,557 psi | 90% | 3323 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 62,961 psi | 87% | 3468 fps | 99.4% |
| Bofors RP3 | <<locked>> | 98% | 65,122 psi | 90% | 3494 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 60,669 psi | 84% | 3383 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 90% | 63,121 psi | 87% | 3383 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 65,572 psi | 90% | 3494 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 63,831 psi | 88% | 3556 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 86% | 62,279 psi | 86% | 3406 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 64,121 psi | 88% | 3432 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 62,047 psi | 86% | 3445 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 57,450 psi | 79% | 3422 fps | 96.4% |
| Hodgdon H4198 | <<locked>> | 82% | 63,469 psi | 88% | 3343 fps | 100% |
| Hodgdon H4895 | <<locked>> | 92% | 63,005 psi | 87% | 3468 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,370 psi | 67% | 3228 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 63,193 psi | 87% | 3504 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 59,321 psi | 82% | 3465 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,056 psi | 48% | 2093 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 64,861 psi | 89% | 3471 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 63,034 psi | 87% | 3455 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 63,179 psi | 87% | 3428 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 63,469 psi | 88% | 3406 fps | 97.3% |
| IMR 4198 | <<locked>> | 86% | 62,047 psi | 86% | 3307 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 62,758 psi | 87% | 3422 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,401 psi | 71% | 3294 fps | 97.9% |
| IMR 4895 | <<locked>> | 94% | 61,873 psi | 85% | 3474 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 92% | 65,224 psi | 90% | 3458 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 62,366 psi | 86% | 3389 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 62,642 psi | 86% | 3425 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 62,018 psi | 86% | 3373 fps | 99.8% |
| Lovex S062 | <<locked>> | 96% | 62,729 psi | 87% | 3425 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 58,088 psi | 80% | 3350 fps | 97.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,651 psi | 77% | 3323 fps | 96.1% |
| Norma 200 | <<locked>> | 82% | 62,439 psi | 86% | 3323 fps | 100% |
| Norma 201 | <<locked>> | 94% | 64,846 psi | 89% | 3448 fps | 100% |
| Norma 202 | <<locked>> | 94% | 65,572 psi | 90% | 3448 fps | 100% |
| Norma 203B | <<locked>> | 96% | 63,353 psi | 87% | 3481 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 53,330 psi | 74% | 3350 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 96% | 65,122 psi | 90% | 3514 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,388 psi | 72% | 3333 fps | 96.2% |
| Ramshot TAC | <<locked>> | 90% | 62,569 psi | 86% | 3422 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 90% | 61,786 psi | 85% | 3438 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 88% | 62,990 psi | 87% | 3402 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,462 psi | 49% | 2142 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 65,122 psi | 90% | 3445 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 62,584 psi | 86% | 3422 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 61,119 psi | 84% | 3517 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 61,032 psi | 84% | 3553 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,998 psi | 74% | 3379 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,331 psi | 75% | 3412 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 92% | 65,499 psi | 90% | 3432 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 65,441 psi | 90% | 3445 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 64,556 psi | 89% | 3478 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 60,669 psi | 84% | 3383 fps | 96.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 58,088 psi | 80% | 3350 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 92% | 62,642 psi | 86% | 3425 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 62,729 psi | 87% | 3425 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,651 psi | 77% | 3323 fps | 96.1% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 65,282 psi | 90% | 3415 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 63,382 psi | 87% | 3031 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 64,353 psi | 89% | 3438 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 62,772 psi | 87% | 3488 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 63,846 psi | 88% | 3386 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 65,369 psi | 90% | 3458 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 65,180 psi | 90% | 3481 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 62,975 psi | 87% | 3330 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 63,179 psi | 87% | 3317 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 59,234 psi | 82% | 3301 fps | 96.5% |
| Somchem S321 | <<locked>> | 88% | 63,730 psi | 88% | 3445 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 62,062 psi | 86% | 3323 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 64,368 psi | 89% | 3442 fps | 99.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 64,310 psi | 89% | 3471 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,688 psi | 66% | 3287 fps | 99.6% |
| Vihtavuori N120 | <<locked>> | 82% | 63,106 psi | 87% | 3238 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 62,236 psi | 86% | 3291 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 62,917 psi | 87% | 3310 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 64,817 psi | 89% | 3402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 62,221 psi | 86% | 3366 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 62,700 psi | 86% | 3396 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,883 psi | 77% | 3346 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 90% | 62,308 psi | 86% | 3406 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 64,600 psi | 89% | 3415 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,998 psi | 76% | 3350 fps | 98.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,072 psi | 79% | 3333 fps | 99.8% |
| Winchester 748 | <<locked>> | 90% | 62,526 psi | 86% | 3458 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 57,769 psi | 80% | 3425 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 94% | 65,485 psi | 90% | 3491 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 46,354 psi | 64% | 3081 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 58,871 psi | 81% | 3409 fps | 99.1% |
| Accurate 2230 | <<locked>> | 80% | 60,655 psi | 84% | 3419 fps | 99.4% |
| Accurate 2460 | <<locked>> | 80% | 50,937 psi | 70% | 3199 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,972 psi | 54% | 2972 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,440 psi | 61% | 3120 fps | 99.6% |
| Accurate 2700 | <<locked>> | 96% | 59,059 psi | 81% | 3287 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 36,782 psi | 51% | 2949 fps | 99% |
| Accurate 4350 | <<locked>> | 92% | 40,654 psi | 56% | 3091 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 54,476 psi | 75% | 3179 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 54,868 psi | 76% | 3205 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 57,406 psi | 79% | 2572 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,743 psi | 59% | 3081 fps | 97% |
| ADI AR 2207 | <<locked>> | 80% | 59,828 psi | 83% | 3251 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 41,220 psi | 57% | 3025 fps | 95.8% |
| ADI AR 2219 | <<locked>> | 80% | 55,825 psi | 77% | 3310 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,817 psi | 62% | 3104 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 44,527 psi | 61% | 3107 fps | 100% |
| Alliant Power Pro 2000-MR | 52.4 gr | 82% | 41,611 psi | 57% | 3156 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,752 psi | 49% | 2923 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,851 psi | 72% | 3192 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,522 psi | 53% | 2995 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 94% | 43,236 psi | 60% | 3169 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 37,913 psi | 52% | 3064 fps | 95.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 60,713 psi | 84% | 3274 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,969 psi | 74% | 3163 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,858 psi | 58% | 3071 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 35,317 psi | 49% | 2920 fps | 95.8% |
| Bofors RP7 | <<locked>> | 98% | 57,188 psi | 79% | 3323 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,427 psi | 64% | 3097 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,540 psi | 60% | 3114 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,906 psi | 66% | 3274 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 80% | 51,082 psi | 70% | 3228 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,069 psi | 72% | 3248 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 44,440 psi | 61% | 3120 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 98% | 53,722 psi | 74% | 3353 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 59,828 psi | 83% | 3291 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 43,134 psi | 59% | 3097 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 37,362 psi | 52% | 2982 fps | 95.8% |
| Hodgdon LEVERevolution | 50.1 gr | 80% | 38,986 psi | 54% | 3045 fps | 97% |
| Hodgdon Superformance | <<locked>> | 98% | 54,853 psi | 76% | 3386 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,136 psi | 36% | 1877 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,292 psi | 57% | 3038 fps | 97.1% |
| IMR 3031 | <<locked>> | 80% | 42,264 psi | 58% | 3104 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,898 psi | 52% | 2940 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,562 psi | 72% | 3219 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 52,025 psi | 72% | 3159 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,637 psi | 77% | 3301 fps | 95.7% |
| IMR 4831 | <<locked>> | 94% | 42,003 psi | 58% | 3100 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 39,465 psi | 54% | 3031 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 80% | 44,817 psi | 62% | 3104 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 80% | 50,546 psi | 70% | 3199 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 41,582 psi | 57% | 3058 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 42,946 psi | 59% | 3022 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 37,985 psi | 52% | 2953 fps | 97.1% |
| Lovex S065 | <<locked>> | 94% | 48,240 psi | 67% | 3169 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 52,156 psi | 72% | 3261 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 58,566 psi | 81% | 3271 fps | 100% |
| Norma 201 | <<locked>> | 80% | 41,771 psi | 58% | 3035 fps | 98% |
| Norma 202 | <<locked>> | 80% | 42,047 psi | 58% | 3048 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 37,913 psi | 52% | 2982 fps | 95.5% |
| Norma URP | <<locked>> | 94% | 43,584 psi | 60% | 3156 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 37,405 psi | 52% | 2986 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 98% | 49,110 psi | 68% | 3268 fps | 95.3% |
| Ramshot TAC | <<locked>> | 82% | 47,892 psi | 66% | 3156 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,034 psi | 61% | 3114 fps | 97.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,472 psi | 67% | 3153 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,382 psi | 36% | 1919 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,169 psi | 69% | 3205 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,169 psi | 71% | 3225 fps | 95.5% |
| ReloadSwiss RS 52 | 49.5 gr | 80% | 40,030 psi | 55% | 3104 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,880 psi | 45% | 2930 fps | 96.4% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 43,526 psi | 60% | 3176 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 47,123 psi | 65% | 3261 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 45,716 psi | 63% | 3100 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 39,682 psi | 55% | 2972 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 35,404 psi | 49% | 2917 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 98% | 57,188 psi | 79% | 3323 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 48,240 psi | 67% | 3169 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,582 psi | 57% | 3058 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 37,985 psi | 52% | 2953 fps | 97.1% |
| Shooters World SW4350 | <<locked>> | 98% | 52,156 psi | 72% | 3261 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,185 psi | 73% | 3228 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 57,392 psi | 79% | 2953 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 56,173 psi | 77% | 3317 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 39,160 psi | 54% | 3038 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,605 psi | 73% | 3219 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 45,977 psi | 63% | 3120 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,176 psi | 57% | 3038 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,062 psi | 59% | 2995 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,665 psi | 49% | 2831 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,361 psi | 76% | 3238 fps | 95.8% |
| Somchem S321 | <<locked>> | 80% | 48,428 psi | 67% | 3189 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 42,772 psi | 59% | 2995 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 42,656 psi | 59% | 3058 fps | 96.9% |
| Somchem S355 | <<locked>> | 82% | 36,405 psi | 50% | 2927 fps | 95.6% |
| Somchem S365 | <<locked>> | 88% | 32,068 psi | 44% | 2897 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 59,524 psi | 82% | 3189 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 48,646 psi | 67% | 3084 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,294 psi | 60% | 2999 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,827 psi | 54% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,668 psi | 55% | 2972 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 32,314 psi | 45% | 2795 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 92% | 42,743 psi | 59% | 3097 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 44,802 psi | 62% | 3097 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,377 psi | 53% | 2953 fps | 99% |
| Vihtavuori N550 | <<locked>> | 92% | 42,163 psi | 58% | 3094 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,476 psi | 49% | 2884 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 44,266 psi | 61% | 3140 fps | 99.1% |
| Winchester 760 | <<locked>> | 98% | 53,722 psi | 74% | 3353 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,727 psi | 56% | 3041 fps | 97.1% |
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 111 powders for .270 Win. Ackley Improved loaded with the .277 | 100gr | Barnes Solid. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,593 fps; across all powders the maximum-charge window runs from 2,093 fps to 3,593 fps. Accurate 4350 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (500 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.277" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon LEVERevolution rank at the top here: for .270 Win. Ackley Improved with the .277 | 100gr | Barnes Solid 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.