Load Specifications
Bullet:.277 | 140gr | Swift A-Frame
Bullet Manufacturer:Swift
Bullet Weight:140 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 | 140gr | Swift A-Frame bullet and 117 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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>> | 84% | 64,049 psi | 88% | 2858 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 64,281 psi | 89% | 2894 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 61,917 psi | 85% | 2917 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 62,105 psi | 86% | 2927 fps | 99.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,750 psi | 71% | 2851 fps | 99.1% |
| Accurate 4064 | <<locked>> | 90% | 64,556 psi | 89% | 2949 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 61,714 psi | 85% | 3015 fps | 100% |
| ADI APS 450 | <<locked>> | 86% | 64,513 psi | 89% | 2283 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 63,440 psi | 87% | 2986 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 64,440 psi | 89% | 2986 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 58,624 psi | 81% | 3002 fps | 98.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 61,888 psi | 85% | 2927 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 64,165 psi | 88% | 2887 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 65,021 psi | 90% | 3130 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 65,441 psi | 90% | 3009 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 62,163 psi | 86% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 62,120 psi | 86% | 3068 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 64,310 psi | 89% | 3100 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,972 psi | 80% | 2992 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,343 psi | 71% | 2930 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,428 psi | 67% | 2871 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,206 psi | 58% | 2782 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,492 psi | 77% | 3064 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 63,933 psi | 88% | 3012 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,978 psi | 65% | 2848 fps | 96% |
| Bofors RP3 | <<locked>> | 90% | 62,932 psi | 87% | 2979 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,343 psi | 71% | 2930 fps | 97.3% |
| Bofors RP7 | <<locked>> | 94% | 61,786 psi | 85% | 2963 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 63,164 psi | 87% | 2904 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 62,279 psi | 86% | 2963 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 65,340 psi | 90% | 3081 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 63,556 psi | 88% | 3002 fps | 100% |
| Hodgdon H414 | <<locked>> | 96% | 64,165 psi | 88% | 3071 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 94% | 63,860 psi | 88% | 3031 fps | 99.1% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,623 psi | 78% | 2940 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 64,223 psi | 89% | 2995 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 62,714 psi | 86% | 2986 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 64,774 psi | 89% | 3031 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 65,572 psi | 90% | 3123 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 50% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 65,427 psi | 90% | 2995 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 65,079 psi | 90% | 2966 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 64,107 psi | 88% | 2969 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 63,512 psi | 88% | 2963 fps | 99.6% |
| IMR 4350 | <<locked>> | 98% | 62,888 psi | 87% | 2995 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 63,643 psi | 88% | 2992 fps | 99.6% |
| IMR 4831 | <<locked>> | 98% | 61,801 psi | 85% | 3002 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 63,730 psi | 88% | 3015 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 58,001 psi | 80% | 2927 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 84% | 61,888 psi | 85% | 2927 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 64,353 psi | 89% | 2956 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 61,830 psi | 85% | 2904 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 64,179 psi | 89% | 2959 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 63,599 psi | 88% | 2986 fps | 100% |
| Lovex S070 | <<locked>> | 98% | 65,354 psi | 90% | 3031 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,888 psi | 59% | 2697 fps | 97.6% |
| Norma 201 | <<locked>> | 86% | 61,975 psi | 85% | 2927 fps | 100% |
| Norma 202 | <<locked>> | 86% | 62,816 psi | 87% | 2920 fps | 100% |
| Norma 203B | <<locked>> | 90% | 65,079 psi | 90% | 3022 fps | 100% |
| Norma 204 | <<locked>> | 98% | 64,658 psi | 89% | 3061 fps | 98.9% |
| Norma MRPᴾ | <<locked>> | 100% | 54,476 psi | 75% | 3015 fps | 99% |
| Norma URP | <<locked>> | 98% | 64,063 psi | 88% | 3051 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 62,497 psi | 86% | 3002 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 62,961 psi | 87% | 3058 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,759 psi | 62% | 2785 fps | 96.2% |
| Ramshot TAC | <<locked>> | 84% | 62,482 psi | 86% | 2966 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 84% | 62,598 psi | 86% | 2976 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 62,743 psi | 87% | 2933 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,796 psi | 51% | 1827 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 65,093 psi | 90% | 2949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 63,179 psi | 87% | 2986 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 63,556 psi | 88% | 3061 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 63,802 psi | 88% | 3091 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 61,583 psi | 85% | 3038 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 64,513 psi | 89% | 3130 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 62,671 psi | 86% | 2897 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 62,497 psi | 86% | 2923 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 62,787 psi | 87% | 2972 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 60,408 psi | 83% | 2969 fps | 97.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,985 psi | 79% | 2972 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 94% | 61,786 psi | 85% | 2963 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 63,599 psi | 88% | 2986 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 86% | 64,353 psi | 89% | 2956 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 64,179 psi | 89% | 2959 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 65,354 psi | 90% | 3031 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 64,614 psi | 89% | 3035 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 65,499 psi | 90% | 2999 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 61,757 psi | 85% | 2956 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 62,961 psi | 87% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 63,860 psi | 88% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 63,802 psi | 88% | 2940 fps | 99.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,478 psi | 78% | 2969 fps | 98.1% |
| Somchem S321 | <<locked>> | 82% | 63,773 psi | 88% | 2963 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 62,337 psi | 86% | 2844 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 65,093 psi | 90% | 2979 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 62,439 psi | 86% | 2966 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 63,034 psi | 87% | 2969 fps | 97.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 63,164 psi | 87% | 3045 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,754 psi | 80% | 2949 fps | 98.9% |
| Vihtavuori N130 | <<locked>> | 82% | 62,294 psi | 86% | 2802 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 63,353 psi | 87% | 2828 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 63,048 psi | 87% | 2877 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 63,411 psi | 87% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 64,397 psi | 89% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 62,395 psi | 86% | 2989 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,980 psi | 69% | 2812 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 84% | 62,845 psi | 87% | 2930 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 65,557 psi | 90% | 2943 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 65,383 psi | 90% | 3048 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,143 psi | 75% | 2946 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,940 psi | 76% | 3002 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 62,627 psi | 86% | 2959 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 63,614 psi | 88% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 64,165 psi | 88% | 3071 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,787 psi | 60% | 2920 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 62,221 psi | 86% | 2966 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,288 psi | 75% | 2887 fps | 97.5% |
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% | 56,811 psi | 78% | 2769 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 49,937 psi | 69% | 2707 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 57,667 psi | 80% | 2864 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,761 psi | 66% | 2703 fps | 97% |
| Accurate 3100 | <<locked>> | 88% | 34,360 psi | 47% | 2516 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 47,268 psi | 65% | 2710 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,723 psi | 49% | 2562 fps | 97.3% |
| ADI APS 450 | <<locked>> | 80% | 58,465 psi | 81% | 2205 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 52,649 psi | 73% | 2831 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,657 psi | 62% | 2680 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 45,281 psi | 62% | 2769 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,694 psi | 75% | 2828 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 56,594 psi | 78% | 2799 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,979 psi | 68% | 2890 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,991 psi | 62% | 2703 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,196 psi | 66% | 2776 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,085 psi | 48% | 2575 fps | 97.4% |
| Alliant Reloder-17 | 49 gr | 80% | 39,581 psi | 55% | 2700 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,773 psi | 62% | 2762 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,846 psi | 62% | 2808 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,282 psi | 38% | 2375 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 35,085 psi | 48% | 2608 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 86% | 33,547 psi | 46% | 2615 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,228 psi | 72% | 2841 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 44,208 psi | 61% | 2792 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 45,266 psi | 62% | 2717 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,846 psi | 62% | 2808 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 39,972 psi | 55% | 2582 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 55,999 psi | 77% | 2805 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,476 psi | 75% | 2854 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 60,858 psi | 84% | 3022 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,716 psi | 63% | 2723 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 37,666 psi | 52% | 2605 fps | 95% |
| Hodgdon H4350 | <<locked>> | 82% | 43,482 psi | 60% | 2690 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 98% | 52,852 psi | 73% | 2881 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 53,229 psi | 73% | 2841 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,605 psi | 45% | 2470 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,850 psi | 69% | 2822 fps | 100% |
| Hodgdon Superformance | 53.1 gr | 82% | 39,479 psi | 54% | 2677 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 37% | 1594 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,749 psi | 70% | 2789 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,693 psi | 74% | 2818 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,963 psi | 65% | 2713 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,197 psi | 68% | 2740 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 40,669 psi | 56% | 2618 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,350 psi | 57% | 2615 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 34,461 psi | 48% | 2516 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 49,429 psi | 68% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,227 psi | 71% | 2815 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 54,694 psi | 75% | 2828 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,794 psi | 73% | 2805 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,605 psi | 71% | 2756 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,152 psi | 65% | 2713 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,015 psi | 54% | 2566 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 37,202 psi | 51% | 2543 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 35,389 psi | 49% | 2539 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 51,532 psi | 71% | 2776 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,996 psi | 72% | 2772 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,543 psi | 66% | 2762 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,876 psi | 63% | 2759 fps | 95.5% |
| Norma MRP | <<locked>> | 90% | 38,566 psi | 53% | 2703 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 35,650 psi | 49% | 2559 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 47,572 psi | 66% | 2779 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,898 psi | 51% | 2598 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 41,742 psi | 58% | 2723 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 54,578 psi | 75% | 2851 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,839 psi | 76% | 2867 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 58,653 psi | 81% | 2877 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,485 psi | 38% | 1634 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 61,046 psi | 84% | 2900 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,861 psi | 63% | 2707 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,866 psi | 72% | 2890 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,076 psi | 58% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,360 psi | 49% | 2579 fps | 96.8% |
| ReloadSwiss RS 70 | 49.7 gr | 80% | 34,534 psi | 48% | 2579 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 55,738 psi | 77% | 2805 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 48,994 psi | 68% | 2726 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,670 psi | 59% | 2661 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 50,009 psi | 69% | 2805 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 43,787 psi | 60% | 2746 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 39,972 psi | 55% | 2582 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,015 psi | 54% | 2566 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,794 psi | 73% | 2805 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,152 psi | 65% | 2713 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,202 psi | 51% | 2543 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,627 psi | 60% | 2713 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,577 psi | 74% | 2831 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,053 psi | 70% | 2802 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,475 psi | 72% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,280 psi | 61% | 2582 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,159 psi | 53% | 2510 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,381 psi | 60% | 2740 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 59,567 psi | 82% | 2907 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 52,127 psi | 72% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,156 psi | 73% | 2818 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,091 psi | 59% | 2664 fps | 99.8% |
| Somchem S361 | <<locked>> | 96% | 55,100 psi | 76% | 2854 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 32,053 psi | 44% | 2513 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 41,655 psi | 57% | 2671 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 58,726 psi | 81% | 2759 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 52,997 psi | 73% | 2697 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,284 psi | 68% | 2697 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,429 psi | 68% | 2707 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,104 psi | 57% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,028 psi | 51% | 2559 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 96% | 43,598 psi | 60% | 2700 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 55,114 psi | 76% | 2828 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 47,703 psi | 66% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,492 psi | 50% | 2559 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 29,863 psi | 41% | 2451 fps | 95.7% |
| Vihtavuori N560 | <<locked>> | 98% | 51,387 psi | 71% | 2940 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,187 psi | 50% | 2530 fps | 99.1% |
| Winchester 748 | <<locked>> | 80% | 55,825 psi | 77% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 37,913 psi | 52% | 2612 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,398 psi | 38% | 2461 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,966 psi | 70% | 2805 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,005 psi | 61% | 2710 fps | 95.1% |
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 117 powders for .270 Win. Ackley Improved loaded with the .277 | 140gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,130 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (500 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.277" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .270 Win. Ackley Improved with the .277 | 140gr | Swift A-Frame 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.