Load Specifications
Bullet:.277 | 100gr | Hornady SP
Bullet Manufacturer:Hornady
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:1:11.5
Load data in caliber .270 Win. Ackley Improved with .277 | 100gr | Hornady SP bullet and 112 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% | 63,686 psi | 88% | 3353 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 63,367 psi | 87% | 3484 fps | 99.5% |
| Accurate 2460 | <<locked>> | 86% | 62,627 psi | 86% | 3386 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 62,526 psi | 86% | 3373 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 65,427 psi | 90% | 3458 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 62,555 psi | 86% | 3366 fps | 96.3% |
| Accurate 4064 | <<locked>> | 96% | 62,236 psi | 86% | 3422 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,839 psi | 76% | 3376 fps | 98.4% |
| Accurate LT-30 | <<locked>> | 84% | 62,004 psi | 86% | 3294 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 62,468 psi | 86% | 3323 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 65,557 psi | 90% | 2700 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 63,092 psi | 87% | 3465 fps | 99.8% |
| ADI AR 2207 | <<locked>> | 82% | 64,034 psi | 88% | 3310 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 64,150 psi | 88% | 3455 fps | 99.7% |
| ADI AR 2219 | <<locked>> | 84% | 64,513 psi | 89% | 3438 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 61,960 psi | 85% | 3412 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 62,830 psi | 87% | 3389 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 64,281 psi | 89% | 3547 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 63,788 psi | 88% | 3606 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 63,976 psi | 88% | 3478 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 62,932 psi | 87% | 3363 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 65,021 psi | 90% | 3510 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,547 psi | 72% | 3376 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 62,178 psi | 86% | 3563 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 82% | 64,875 psi | 89% | 3333 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 61,801 psi | 85% | 3278 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 63,672 psi | 88% | 3481 fps | 99.5% |
| Bofors RP3 | <<locked>> | 98% | 65,543 psi | 90% | 3501 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 61,279 psi | 85% | 3396 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 90% | 63,498 psi | 88% | 3392 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 61,888 psi | 85% | 3445 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 64,571 psi | 89% | 3566 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 86% | 62,758 psi | 87% | 3415 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 64,498 psi | 89% | 3438 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 62,758 psi | 87% | 3458 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 58,030 psi | 80% | 3432 fps | 96.6% |
| Hodgdon H4198 | <<locked>> | 82% | 63,933 psi | 88% | 3350 fps | 100% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 62,714 psi | 86% | 3461 fps | 96% |
| Hodgdon H4895 | <<locked>> | 92% | 63,715 psi | 88% | 3478 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,718 psi | 67% | 3235 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 63,585 psi | 88% | 3510 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 59,828 psi | 83% | 3478 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,201 psi | 49% | 2100 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 65,253 psi | 90% | 3478 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 63,512 psi | 88% | 3461 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 63,556 psi | 88% | 3442 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 63,773 psi | 88% | 3415 fps | 97.4% |
| IMR 4198 | <<locked>> | 86% | 62,584 psi | 86% | 3317 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 63,353 psi | 87% | 3435 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,779 psi | 71% | 3301 fps | 98% |
| IMR 4895 | <<locked>> | 94% | 62,569 psi | 86% | 3488 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 90% | 61,960 psi | 85% | 3412 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 62,816 psi | 87% | 3396 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 63,469 psi | 88% | 3438 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 62,381 psi | 86% | 3383 fps | 99.8% |
| Lovex S062 | <<locked>> | 96% | 63,077 psi | 87% | 3432 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 58,740 psi | 81% | 3363 fps | 97.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,289 psi | 78% | 3337 fps | 96.3% |
| Norma 200 | <<locked>> | 82% | 62,932 psi | 87% | 3333 fps | 100% |
| Norma 201 | <<locked>> | 94% | 65,296 psi | 90% | 3458 fps | 100% |
| Norma 202 | <<locked>> | 92% | 62,221 psi | 86% | 3406 fps | 100% |
| Norma 203B | <<locked>> | 96% | 64,049 psi | 88% | 3494 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 53,954 psi | 74% | 3363 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 94% | 61,366 psi | 85% | 3461 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,953 psi | 73% | 3346 fps | 96.4% |
| Ramshot TAC | <<locked>> | 90% | 62,903 psi | 87% | 3428 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 62,482 psi | 86% | 3451 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 88% | 63,324 psi | 87% | 3412 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,389 psi | 49% | 2142 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 65,557 psi | 90% | 3451 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 62,888 psi | 87% | 3432 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 61,902 psi | 85% | 3530 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 61,728 psi | 85% | 3566 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,621 psi | 75% | 3392 fps | 98.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,563 psi | 75% | 3419 fps | 97.8% |
| Rottweil R 901 | <<locked>> | 90% | 62,018 psi | 86% | 3383 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 61,757 psi | 85% | 3396 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 65,325 psi | 90% | 3491 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 61,279 psi | 85% | 3396 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 58,740 psi | 81% | 3363 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 92% | 63,469 psi | 88% | 3438 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 63,077 psi | 87% | 3432 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,289 psi | 78% | 3337 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 61,583 psi | 85% | 3366 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 63,585 psi | 88% | 3035 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 64,759 psi | 89% | 3445 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 63,135 psi | 87% | 3497 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 64,005 psi | 88% | 3392 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 61,322 psi | 85% | 3402 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 65,543 psi | 90% | 3488 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 63,396 psi | 87% | 3340 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 63,570 psi | 88% | 3327 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 59,553 psi | 82% | 3307 fps | 96.6% |
| Somchem S321 | <<locked>> | 88% | 64,121 psi | 88% | 3455 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 62,468 psi | 86% | 3330 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 65,050 psi | 90% | 3455 fps | 99.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 65,050 psi | 90% | 3484 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,283 psi | 67% | 3301 fps | 99.7% |
| Vihtavuori N120 | <<locked>> | 82% | 63,628 psi | 88% | 3248 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 62,671 psi | 86% | 3297 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 63,353 psi | 87% | 3317 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 65,325 psi | 90% | 3409 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 62,903 psi | 87% | 3376 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 63,367 psi | 87% | 3406 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,550 psi | 78% | 3363 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 90% | 63,034 psi | 87% | 3419 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 65,253 psi | 90% | 3428 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,608 psi | 77% | 3363 fps | 98.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,580 psi | 79% | 3343 fps | 99.9% |
| Winchester 748 | <<locked>> | 90% | 62,932 psi | 87% | 3468 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 58,030 psi | 80% | 3432 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 92% | 61,757 psi | 85% | 3438 fps | 99.9% |
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% | 46,543 psi | 64% | 3087 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 59,364 psi | 82% | 3419 fps | 99.2% |
| Accurate 2460 | <<locked>> | 80% | 51,082 psi | 70% | 3205 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,407 psi | 54% | 2982 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,398 psi | 64% | 3153 fps | 99.8% |
| Accurate 2700 | <<locked>> | 92% | 58,363 psi | 80% | 3297 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 37,202 psi | 51% | 2959 fps | 99.1% |
| Accurate 4350 | <<locked>> | 92% | 41,292 psi | 57% | 3107 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 54,607 psi | 75% | 3182 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 55,013 psi | 76% | 3212 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 57,450 psi | 79% | 2575 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,902 psi | 59% | 3087 fps | 97.1% |
| ADI AR 2207 | <<locked>> | 80% | 60,379 psi | 83% | 3261 fps | 100% |
| ADI AR 2208 | <<locked>> | 82% | 38,972 psi | 54% | 2972 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 56,318 psi | 78% | 3317 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,947 psi | 62% | 3107 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 45,063 psi | 62% | 3117 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,489 psi | 72% | 3346 fps | 99.3% |
| Alliant Power Pro 2000-MR | 52.8 gr | 82% | 41,945 psi | 58% | 3169 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,940 psi | 50% | 2930 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,402 psi | 72% | 3205 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,682 psi | 53% | 3002 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,872 psi | 56% | 3114 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 84% | 35,650 psi | 49% | 2999 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 80% | 61,221 psi | 84% | 3284 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 54,346 psi | 75% | 3169 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,206 psi | 58% | 3081 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 35,679 psi | 49% | 2933 fps | 96% |
| Bofors RP7 | <<locked>> | 98% | 57,493 psi | 79% | 3333 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,833 psi | 65% | 3107 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,903 psi | 61% | 3123 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,341 psi | 67% | 3284 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 51,561 psi | 71% | 3241 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,489 psi | 72% | 3255 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 44,802 psi | 62% | 3130 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 98% | 54,085 psi | 75% | 3363 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 60,017 psi | 83% | 3294 fps | 100% |
| Hodgdon H4350 | <<locked>> | 98% | 58,537 psi | 81% | 3392 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 43,308 psi | 60% | 3104 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 35,259 psi | 49% | 2927 fps | 95% |
| Hodgdon LEVERevolution | 50.5 gr | 80% | 39,378 psi | 54% | 3058 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 98% | 55,361 psi | 76% | 3396 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 36% | 1880 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,684 psi | 57% | 3051 fps | 97.3% |
| IMR 3031 | <<locked>> | 80% | 42,743 psi | 59% | 3114 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,305 psi | 53% | 2953 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,895 psi | 73% | 3228 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 52,286 psi | 72% | 3166 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,547 psi | 72% | 3248 fps | 95.1% |
| IMR 4831 | <<locked>> | 94% | 42,366 psi | 58% | 3110 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 39,639 psi | 55% | 3041 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 80% | 44,947 psi | 62% | 3107 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 80% | 50,966 psi | 70% | 3209 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 42,032 psi | 58% | 3071 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 43,120 psi | 59% | 3028 fps | 97.2% |
| Lovex S062 | <<locked>> | 80% | 38,174 psi | 53% | 2959 fps | 97.2% |
| Lovex S065 | <<locked>> | 92% | 45,803 psi | 63% | 3120 fps | 95% |
| Lovex S070 | <<locked>> | 98% | 52,750 psi | 73% | 3274 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 59,074 psi | 81% | 3281 fps | 100% |
| Norma 201 | <<locked>> | 80% | 42,148 psi | 58% | 3045 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 42,235 psi | 58% | 3054 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 38,087 psi | 53% | 2989 fps | 95.6% |
| Norma URP | <<locked>> | 92% | 41,307 psi | 57% | 3104 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 37,753 psi | 52% | 2999 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 98% | 49,414 psi | 68% | 3278 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 45,092 psi | 62% | 3100 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,411 psi | 61% | 3123 fps | 97.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,834 psi | 67% | 3163 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,339 psi | 36% | 1923 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,589 psi | 70% | 3215 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,779 psi | 71% | 3241 fps | 95.8% |
| ReloadSwiss RS 52 | 49.9 gr | 80% | 40,451 psi | 56% | 3114 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,199 psi | 46% | 2943 fps | 96.7% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,063 psi | 61% | 3189 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 47,587 psi | 66% | 3278 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 45,919 psi | 63% | 3107 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 40,059 psi | 55% | 2986 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 35,781 psi | 49% | 2927 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 98% | 57,493 psi | 79% | 3333 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 45,803 psi | 63% | 3120 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,032 psi | 58% | 3071 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 38,174 psi | 53% | 2959 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 98% | 52,750 psi | 73% | 3274 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,592 psi | 74% | 3235 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 57,624 psi | 79% | 2959 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 56,608 psi | 78% | 3323 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,782 psi | 51% | 2979 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,156 psi | 73% | 3232 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,207 psi | 60% | 3064 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,568 psi | 57% | 3048 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,468 psi | 60% | 3005 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,027 psi | 50% | 2841 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 52,127 psi | 72% | 3182 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 48,805 psi | 67% | 3199 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 43,163 psi | 60% | 3009 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 43,018 psi | 59% | 3068 fps | 97.1% |
| Somchem S355 | <<locked>> | 82% | 36,753 psi | 51% | 2940 fps | 95.8% |
| Somchem S365 | <<locked>> | 88% | 32,358 psi | 45% | 2907 fps | 95.4% |
| Vihtavuori N120 | <<locked>> | 80% | 60,031 psi | 83% | 3199 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 49,066 psi | 68% | 3094 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,700 psi | 60% | 3009 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,291 psi | 54% | 2982 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,059 psi | 55% | 2982 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 32,634 psi | 45% | 2805 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 92% | 43,323 psi | 60% | 3110 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 45,252 psi | 62% | 3107 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,711 psi | 53% | 2959 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 92% | 42,699 psi | 59% | 3107 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,708 psi | 49% | 2894 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 44,701 psi | 62% | 3150 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 54,389 psi | 75% | 3366 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,104 psi | 57% | 3054 fps | 97.2% |
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 112 powders for .270 Win. Ackley Improved loaded with the .277 | 100gr | Hornady SP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,606 fps; across all powders the maximum-charge window runs from 2,100 fps to 3,606 fps. Accurate 4350 gives the best case fill at 100 %, and 112 of the 112 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (500 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.277" calls for a 1:11.5 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 | Hornady SP 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.