Load Specifications
Bullet Manufacturer:Geco
Bullet Weight:150 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:1:14.0
Load data in caliber .270 Win. Ackley Improved with .277 | 150gr | Geco SOFTPOINT bullet and 120 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-16.
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% | 64,527 psi | 89% | 2776 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 65,485 psi | 90% | 2815 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 62,613 psi | 86% | 2858 fps | 99.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,392 psi | 79% | 2858 fps | 99.9% |
| Accurate 4064 | <<locked>> | 86% | 61,815 psi | 85% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 63,367 psi | 87% | 2949 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 59,495 psi | 82% | 2999 fps | 97.4% |
| ADI APS 450 | <<locked>> | 86% | 64,759 psi | 89% | 2231 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 63,933 psi | 88% | 2907 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 65,369 psi | 90% | 2913 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 64,107 psi | 88% | 3002 fps | 99.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,667 psi | 80% | 2943 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 82% | 62,279 psi | 86% | 2844 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 65,035 psi | 90% | 2805 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 61,801 psi | 85% | 2995 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 62,685 psi | 86% | 2884 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 62,729 psi | 87% | 2910 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 63,701 psi | 88% | 2999 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 61,830 psi | 85% | 2972 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 63,440 psi | 87% | 2992 fps | 99.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,811 psi | 78% | 2940 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,693 psi | 74% | 2864 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,572 psi | 64% | 2799 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 62,859 psi | 87% | 3071 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 64,701 psi | 89% | 2933 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,112 psi | 72% | 2864 fps | 98.2% |
| Bofors RP3 | <<locked>> | 88% | 64,020 psi | 88% | 2907 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,811 psi | 78% | 2940 fps | 99% |
| Bofors RP7 | <<locked>> | 92% | 62,671 psi | 86% | 2900 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 63,367 psi | 87% | 2822 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 62,932 psi | 87% | 2881 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,166 psi | 64% | 2736 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 88% | 64,368 psi | 89% | 2930 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 65,470 psi | 90% | 3005 fps | 100% |
| Hodgdon H4350 | <<locked>> | 92% | 64,600 psi | 89% | 2963 fps | 99.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 61,946 psi | 85% | 2946 fps | 98% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 60,553 psi | 84% | 2927 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 84% | 64,745 psi | 89% | 2913 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 64,150 psi | 88% | 2917 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 61,859 psi | 85% | 2907 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,745 psi | 63% | 2838 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 92% | 62,627 psi | 86% | 2999 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 51% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 62,062 psi | 86% | 2867 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 62,163 psi | 86% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 64,788 psi | 89% | 2894 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 63,585 psi | 88% | 2887 fps | 99.9% |
| IMR 4350 | <<locked>> | 96% | 63,875 psi | 88% | 2930 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 64,426 psi | 89% | 2923 fps | 99.9% |
| IMR 4831 | <<locked>> | 96% | 63,527 psi | 88% | 2936 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 64,397 psi | 89% | 2933 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 62,874 psi | 87% | 2923 fps | 98.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,042 psi | 76% | 2917 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 82% | 62,279 psi | 86% | 2844 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 65,412 psi | 90% | 2877 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 62,337 psi | 86% | 2828 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 64,992 psi | 90% | 2884 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 64,542 psi | 89% | 2913 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 62,352 psi | 86% | 2910 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,645 psi | 66% | 2707 fps | 99.2% |
| Norma 201 | <<locked>> | 84% | 62,439 psi | 86% | 2844 fps | 100% |
| Norma 202 | <<locked>> | 84% | 63,382 psi | 87% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 86% | 62,004 psi | 86% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 94% | 61,496 psi | 85% | 2940 fps | 99.2% |
| Norma MRPᴾ | <<locked>> | 100% | 60,843 psi | 84% | 3025 fps | 99.9% |
| Norma URP | <<locked>> | 96% | 65,427 psi | 90% | 2979 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 63,483 psi | 88% | 2927 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,535 psi | 77% | 2933 fps | 98% |
| Ramshot Hunter | <<locked>> | 96% | 64,237 psi | 89% | 2992 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,777 psi | 69% | 2812 fps | 98.5% |
| Ramshot TAC | <<locked>> | 82% | 62,685 psi | 86% | 2887 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 63,092 psi | 87% | 2897 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,434 psi | 52% | 1788 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 64,150 psi | 88% | 2917 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 64,905 psi | 90% | 2989 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 61,177 psi | 84% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 63,556 psi | 88% | 2976 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 61,670 psi | 85% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,629 psi | 63% | 2831 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 82% | 63,222 psi | 87% | 2815 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 63,324 psi | 87% | 2844 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 64,179 psi | 89% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 61,670 psi | 85% | 2913 fps | 98.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 62,758 psi | 87% | 2976 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 92% | 62,671 psi | 86% | 2900 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 64,542 psi | 89% | 2913 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 84% | 65,412 psi | 90% | 2877 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 64,992 psi | 90% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 62,352 psi | 86% | 2910 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 61,917 psi | 85% | 2913 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 61,844 psi | 85% | 2867 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 62,555 psi | 86% | 2881 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 63,164 psi | 87% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 64,310 psi | 89% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 64,759 psi | 89% | 2877 fps | 100% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 62,250 psi | 86% | 2972 fps | 99.4% |
| Somchem S335 | <<locked>> | 84% | 62,656 psi | 86% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 61,569 psi | 85% | 2851 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 63,643 psi | 88% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 63,962 psi | 88% | 2913 fps | 98.2% |
| Somchem S365 | <<locked>> | 98% | 65,398 psi | 90% | 2979 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 63,338 psi | 87% | 2949 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 84% | 63,672 psi | 88% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 63,773 psi | 88% | 2795 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 64,165 psi | 88% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 65,079 psi | 90% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 63,657 psi | 88% | 2923 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,071 psi | 76% | 2818 fps | 99% |
| Vihtavuori N530 | <<locked>> | 82% | 63,251 psi | 87% | 2848 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 62,236 psi | 86% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 62,874 psi | 87% | 2933 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 60,205 psi | 83% | 2943 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 60,916 psi | 84% | 3018 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,631 psi | 67% | 2805 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 63,715 psi | 88% | 2887 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 64,310 psi | 89% | 2897 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 61,438 psi | 85% | 2953 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,385 psi | 68% | 2933 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 63,092 psi | 87% | 2890 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 59,669 psi | 82% | 2894 fps | 99.1% |
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% | 60,611 psi | 84% | 2730 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 54,186 psi | 75% | 2677 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,416 psi | 71% | 2694 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 33,257 psi | 46% | 2418 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,358 psi | 71% | 2687 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,407 psi | 54% | 2566 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 96% | 51,822 psi | 71% | 2877 fps | 95.8% |
| ADI APS 450 | <<locked>> | 80% | 58,581 psi | 81% | 2149 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 56,492 psi | 78% | 2805 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 48,066 psi | 66% | 2664 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,712 psi | 56% | 2605 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 94% | 47,282 psi | 65% | 2766 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 58,552 psi | 81% | 2799 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 61,250 psi | 84% | 2762 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,809 psi | 74% | 2884 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,704 psi | 67% | 2687 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,996 psi | 72% | 2756 fps | 100% |
| Alliant Reloder-16 | 46.9 gr | 80% | 38,247 psi | 53% | 2575 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,526 psi | 60% | 2700 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,306 psi | 56% | 2598 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,654 psi | 56% | 2648 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,166 psi | 39% | 2339 fps | 97.2% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,763 psi | 44% | 2454 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 30,023 psi | 41% | 2444 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 56,637 psi | 78% | 2828 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 40,118 psi | 55% | 2635 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 49,182 psi | 68% | 2700 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,654 psi | 56% | 2648 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 43,105 psi | 59% | 2579 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 59,625 psi | 82% | 2772 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 59,146 psi | 82% | 2835 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 43,178 psi | 60% | 2677 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 49,632 psi | 68% | 2717 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 41,350 psi | 57% | 2615 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 80% | 44,034 psi | 61% | 2628 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 92% | 47,210 psi | 65% | 2710 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,588 psi | 68% | 2756 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 57,174 psi | 79% | 2812 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,911 psi | 50% | 2474 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,215 psi | 75% | 2805 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,219 psi | 55% | 2713 fps | 95.7% |
| Hodgdon Superformance | 53.4 gr | 80% | 40,335 psi | 56% | 2628 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 38% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,737 psi | 75% | 2766 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 58,204 psi | 80% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,575 psi | 70% | 2697 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,808 psi | 73% | 2730 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 38,856 psi | 54% | 2510 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,440 psi | 61% | 2605 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 37,840 psi | 52% | 2520 fps | 98.7% |
| IMR 4895 | <<locked>> | 80% | 53,359 psi | 74% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,008 psi | 68% | 2710 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 45,107 psi | 62% | 2736 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 58,552 psi | 81% | 2799 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 57,290 psi | 79% | 2779 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 55,100 psi | 76% | 2730 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,865 psi | 70% | 2694 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,177 psi | 58% | 2559 fps | 98.5% |
| Lovex S070 | <<locked>> | 80% | 40,379 psi | 56% | 2543 fps | 97.1% |
| Lovex S071 | <<locked>> | 88% | 32,503 psi | 45% | 2398 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 55,347 psi | 76% | 2749 fps | 100% |
| Norma 202 | <<locked>> | 80% | 55,898 psi | 77% | 2743 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,358 psi | 71% | 2743 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,915 psi | 56% | 2589 fps | 95.1% |
| Norma MRP | <<locked>> | 86% | 37,275 psi | 51% | 2602 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 39,102 psi | 54% | 2562 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 52,011 psi | 72% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,875 psi | 62% | 2746 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 37,913 psi | 52% | 2549 fps | 97.1% |
| Ramshot Magnum | <<locked>> | 94% | 40,030 psi | 55% | 2625 fps | 96% |
| Ramshot TAC | <<locked>> | 80% | 58,769 psi | 81% | 2835 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 59,045 psi | 81% | 2841 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 38% | 1594 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,545 psi | 68% | 2700 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 56,652 psi | 78% | 2877 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,224 psi | 64% | 2749 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,160 psi | 54% | 2585 fps | 98.7% |
| ReloadSwiss RS 70 | 51.3 gr | 80% | 37,956 psi | 52% | 2595 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,941 psi | 51% | 2628 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 59,422 psi | 82% | 2766 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 52,707 psi | 73% | 2703 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,441 psi | 64% | 2651 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,933 psi | 62% | 2641 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 86% | 39,436 psi | 54% | 2582 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 43,105 psi | 59% | 2579 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,177 psi | 58% | 2559 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 57,290 psi | 79% | 2779 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 50,865 psi | 70% | 2694 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,379 psi | 56% | 2543 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,601 psi | 66% | 2703 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 57,783 psi | 80% | 2815 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 55,013 psi | 76% | 2779 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 55,854 psi | 77% | 2677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,413 psi | 65% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,191 psi | 57% | 2507 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,771 psi | 58% | 2635 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 55,724 psi | 77% | 2677 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 57,580 psi | 79% | 2799 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,673 psi | 64% | 2648 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,153 psi | 68% | 2690 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 35,694 psi | 49% | 2520 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,637 psi | 52% | 2513 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 56,420 psi | 78% | 2657 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 53,098 psi | 73% | 2664 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,185 psi | 73% | 2677 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,512 psi | 61% | 2575 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,437 psi | 56% | 2559 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 39,436 psi | 54% | 2546 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 59,001 psi | 81% | 2795 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 51,488 psi | 71% | 2674 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,987 psi | 55% | 2562 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 31,270 psi | 43% | 2415 fps | 97.3% |
| Vihtavuori N560 | <<locked>> | 92% | 46,079 psi | 64% | 2769 fps | 95% |
| Vihtavuori N565 | <<locked>> | 98% | 45,498 psi | 63% | 2749 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,537 psi | 55% | 2530 fps | 99.9% |
| Winchester 748 | <<locked>> | 80% | 60,423 psi | 83% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,350 psi | 57% | 2615 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,889 psi | 34% | 2313 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,100 psi | 76% | 2785 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,279 psi | 58% | 2608 fps | 95.8% |
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 120 powders for .270 Win. Ackley Improved loaded with the .277 | 150gr | Geco SOFTPOINT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,745 fps to 3,071 fps. Accurate 3100 gives the best case fill at 100 %, and 120 of the 120 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (500 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:14.0 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-16 rank at the top here: for .270 Win. Ackley Improved with the .277 | 150gr | Geco SOFTPOINT 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.