Load Specifications
Bullet:.277 | 154gr | RWS Evolution
Bullet Manufacturer:RWS
Bullet Weight:154 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:1:10.5
Load data in caliber .270 Win. Ackley Improved with .277 | 154gr | RWS Evolution bullet and 121 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester 760, ReloadSwiss RS 60 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 62,961 psi | 87% | 2707 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 63,425 psi | 87% | 2743 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 64,963 psi | 90% | 2815 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 64,832 psi | 89% | 2835 fps | 99.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,955 psi | 76% | 2776 fps | 99.8% |
| Accurate 4064 | <<locked>> | 88% | 63,962 psi | 88% | 2802 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 65,499 psi | 90% | 2923 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,145 psi | 79% | 2917 fps | 97% |
| ADI APS 450 | <<locked>> | 86% | 64,571 psi | 89% | 2175 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 62,468 psi | 86% | 2835 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 63,556 psi | 88% | 2838 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 62,033 psi | 86% | 2920 fps | 99.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,608 psi | 77% | 2861 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 64,803 psi | 89% | 2825 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 63,353 psi | 87% | 2736 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 64,136 psi | 88% | 2972 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 64,803 psi | 89% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 64,846 psi | 89% | 2881 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 61,699 psi | 85% | 2923 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 63,788 psi | 88% | 2949 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 61,090 psi | 84% | 2907 fps | 99.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,549 psi | 75% | 2858 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,721 psi | 71% | 2792 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,904 psi | 62% | 2723 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 59,828 psi | 83% | 2986 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 62,685 psi | 86% | 2858 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,125 psi | 69% | 2785 fps | 97.8% |
| Bofors RP3 | <<locked>> | 88% | 62,134 psi | 86% | 2831 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,549 psi | 75% | 2858 fps | 98.6% |
| Bofors RP7 | <<locked>> | 94% | 64,905 psi | 90% | 2874 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 65,557 psi | 90% | 2792 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 65,485 psi | 90% | 2861 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 62,265 psi | 86% | 2851 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 63,483 psi | 88% | 2927 fps | 100% |
| Hodgdon H4350 | <<locked>> | 92% | 62,801 psi | 87% | 2884 fps | 99.5% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 59,756 psi | 82% | 2864 fps | 97.6% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 58,378 psi | 81% | 2844 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 84% | 63,251 psi | 87% | 2841 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 61,931 psi | 85% | 2841 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 64,020 psi | 88% | 2881 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,918 psi | 61% | 2753 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 94% | 64,629 psi | 89% | 2976 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,419 psi | 50% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 64,034 psi | 88% | 2838 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 63,991 psi | 88% | 2808 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 63,135 psi | 87% | 2822 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 62,134 psi | 86% | 2815 fps | 99.9% |
| IMR 4350 | <<locked>> | 96% | 61,960 psi | 85% | 2854 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 62,598 psi | 86% | 2848 fps | 99.9% |
| IMR 4831 | <<locked>> | 98% | 65,383 psi | 90% | 2907 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 62,685 psi | 86% | 2861 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 61,046 psi | 84% | 2848 fps | 97.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,910 psi | 73% | 2831 fps | 97.1% |
| IMR 8208 XBR | <<locked>> | 84% | 64,803 psi | 89% | 2825 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 63,338 psi | 87% | 2805 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 64,571 psi | 89% | 2802 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 63,309 psi | 87% | 2812 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 62,714 psi | 86% | 2838 fps | 100% |
| Lovex S070 | <<locked>> | 96% | 64,353 psi | 89% | 2884 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,730 psi | 63% | 2631 fps | 98.9% |
| Norma 201 | <<locked>> | 86% | 64,614 psi | 89% | 2818 fps | 100% |
| Norma 202 | <<locked>> | 86% | 65,601 psi | 90% | 2812 fps | 100% |
| Norma 203B | <<locked>> | 88% | 64,034 psi | 88% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 96% | 63,527 psi | 88% | 2917 fps | 99.3% |
| Norma MRPᴾ | <<locked>> | 100% | 58,218 psi | 80% | 2943 fps | 99.8% |
| Norma URP | <<locked>> | 96% | 63,251 psi | 87% | 2904 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 61,511 psi | 85% | 2851 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,505 psi | 74% | 2851 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 96% | 62,149 psi | 86% | 2913 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,776 psi | 66% | 2730 fps | 98% |
| Ramshot TAC | <<locked>> | 84% | 65,050 psi | 90% | 2864 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 84% | 65,340 psi | 90% | 2871 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 65,398 psi | 90% | 2828 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 51% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 62,337 psi | 86% | 2841 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 62,671 psi | 86% | 2907 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 63,193 psi | 87% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 65,224 psi | 90% | 2946 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 63,846 psi | 88% | 2986 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,700 psi | 60% | 2746 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 84% | 65,412 psi | 90% | 2789 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 65,224 psi | 90% | 2818 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 61,946 psi | 85% | 2825 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 63,715 psi | 88% | 2890 fps | 98.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 60,626 psi | 84% | 2897 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 94% | 64,905 psi | 90% | 2874 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 62,714 psi | 86% | 2838 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 84% | 63,338 psi | 87% | 2805 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 63,309 psi | 87% | 2812 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 64,353 psi | 89% | 2884 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 63,962 psi | 88% | 2887 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 64,484 psi | 89% | 2851 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 64,716 psi | 89% | 2858 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 65,340 psi | 90% | 2740 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 62,671 psi | 86% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 62,888 psi | 87% | 2799 fps | 99.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 60,104 psi | 83% | 2894 fps | 99.2% |
| Somchem S335 | <<locked>> | 86% | 64,846 psi | 89% | 2736 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 63,817 psi | 88% | 2828 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 65,615 psi | 90% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 61,830 psi | 85% | 2831 fps | 97.8% |
| Somchem S365 | <<locked>> | 98% | 63,179 psi | 87% | 2904 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 61,032 psi | 84% | 2867 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 82% | 64,716 psi | 89% | 2690 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 62,279 psi | 86% | 2677 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 61,960 psi | 85% | 2723 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 62,439 psi | 86% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 63,454 psi | 88% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 61,844 psi | 85% | 2848 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,910 psi | 73% | 2740 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 84% | 65,601 psi | 90% | 2825 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 64,165 psi | 88% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 64,730 psi | 89% | 2904 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,841 psi | 80% | 2864 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 58,436 psi | 81% | 2933 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 61,830 psi | 85% | 2815 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 62,569 psi | 86% | 2825 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 63,483 psi | 88% | 2927 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,789 psi | 65% | 2854 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 65,412 psi | 90% | 2867 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,493 psi | 79% | 2812 fps | 98.8% |
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% | 59,219 psi | 82% | 2661 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 52,562 psi | 72% | 2612 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 60,800 psi | 84% | 2766 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,169 psi | 69% | 2625 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 32,082 psi | 44% | 2349 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 49,806 psi | 69% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,101 psi | 53% | 2500 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 96% | 49,661 psi | 68% | 2795 fps | 95.3% |
| ADI APS 450 | <<locked>> | 80% | 58,407 psi | 81% | 2096 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 55,158 psi | 76% | 2736 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,731 psi | 64% | 2595 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,032 psi | 58% | 2589 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 45,701 psi | 63% | 2687 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 57,203 psi | 79% | 2730 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 59,422 psi | 82% | 2690 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,040 psi | 72% | 2808 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,311 psi | 65% | 2618 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,633 psi | 70% | 2687 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,043 psi | 51% | 2507 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,901 psi | 58% | 2625 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,510 psi | 57% | 2579 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,829 psi | 58% | 2631 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,224 psi | 38% | 2274 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,706 psi | 45% | 2441 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 82% | 30,966 psi | 43% | 2434 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 55,114 psi | 76% | 2756 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 41,263 psi | 57% | 2618 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 47,848 psi | 66% | 2631 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,829 psi | 58% | 2631 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,916 psi | 58% | 2507 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 58,291 psi | 80% | 2703 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 57,479 psi | 79% | 2762 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 48,182 psi | 66% | 2644 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,016 psi | 55% | 2543 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 42,917 psi | 59% | 2562 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 48,747 psi | 67% | 2694 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 47,906 psi | 66% | 2677 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 55,782 psi | 77% | 2743 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,577 psi | 48% | 2405 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,460 psi | 72% | 2730 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 38,638 psi | 53% | 2628 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 38,754 psi | 53% | 2549 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 38% | 1519 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,142 psi | 73% | 2694 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 56,434 psi | 78% | 2717 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,168 psi | 68% | 2625 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,401 psi | 71% | 2657 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 37,579 psi | 52% | 2438 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,308 psi | 60% | 2536 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 36,593 psi | 50% | 2451 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 51,953 psi | 72% | 2713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,485 psi | 65% | 2635 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 46,586 psi | 64% | 2717 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 57,203 psi | 79% | 2730 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 55,695 psi | 77% | 2710 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,780 psi | 74% | 2657 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,429 psi | 68% | 2621 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,973 psi | 56% | 2493 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 39,247 psi | 54% | 2477 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 33,228 psi | 46% | 2379 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 53,925 psi | 74% | 2680 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,433 psi | 75% | 2674 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,995 psi | 69% | 2674 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,351 psi | 58% | 2575 fps | 95.6% |
| Norma MRP | <<locked>> | 86% | 35,795 psi | 49% | 2526 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 37,826 psi | 52% | 2490 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 50,415 psi | 70% | 2697 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,311 psi | 64% | 2723 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 36,666 psi | 51% | 2480 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 38,276 psi | 53% | 2543 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 57,334 psi | 79% | 2762 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 57,406 psi | 79% | 2772 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 61,453 psi | 85% | 2782 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 38% | 1555 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,022 psi | 66% | 2628 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 54,911 psi | 76% | 2802 fps | 100% |
| ReloadSwiss RS 60 | 47.9 gr | 80% | 44,527 psi | 61% | 2674 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,811 psi | 52% | 2516 fps | 98.4% |
| ReloadSwiss RS 70 | 48.7 gr | 80% | 36,680 psi | 51% | 2523 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,145 psi | 53% | 2615 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 58,073 psi | 80% | 2700 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 51,242 psi | 71% | 2631 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,063 psi | 62% | 2582 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,499 psi | 64% | 2625 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 40,785 psi | 56% | 2566 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 41,916 psi | 58% | 2507 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,973 psi | 56% | 2493 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 55,695 psi | 77% | 2710 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 49,429 psi | 68% | 2621 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,247 psi | 54% | 2477 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,195 psi | 64% | 2635 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 56,188 psi | 77% | 2743 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,621 psi | 74% | 2710 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,578 psi | 75% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,195 psi | 64% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,103 psi | 55% | 2441 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,408 psi | 56% | 2562 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 54,360 psi | 75% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 56,014 psi | 77% | 2726 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,324 psi | 63% | 2579 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,836 psi | 70% | 2671 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 34,229 psi | 47% | 2451 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 38,667 psi | 53% | 2493 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 60,930 psi | 84% | 2648 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 55,143 psi | 76% | 2592 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,663 psi | 71% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,808 psi | 71% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,279 psi | 60% | 2510 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,247 psi | 54% | 2490 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,116 psi | 53% | 2477 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 57,696 psi | 80% | 2726 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 50,082 psi | 69% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,696 psi | 53% | 2493 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,023 psi | 41% | 2346 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 94% | 47,543 psi | 66% | 2753 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,319 psi | 53% | 2464 fps | 99.9% |
| Winchester 748 | <<locked>> | 80% | 58,537 psi | 81% | 2776 fps | 100% |
| Winchester 760 | 46.9 gr | 80% | 40,016 psi | 55% | 2543 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,047 psi | 33% | 2244 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,751 psi | 74% | 2717 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,799 psi | 56% | 2536 fps | 95.3% |
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 128 powders for .270 Win. Ackley Improved loaded with the .277 | 154gr | RWS Evolution. Alliant Reloder-26 delivers the highest muzzle velocity at 2,986 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,986 fps. Accurate 3100 gives the best case fill at 100 %, and 128 of the 128 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (500 MPa), the top charges use 43–90 %, leaving at least 10 % headroom. The 154.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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. Winchester 760, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .270 Win. Ackley Improved with the .277 | 154gr | RWS Evolution they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.