Load Specifications
Load data in caliber .270 Win. with .277 | 156gr | Sako Hammerhead bullet and 92 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 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 2495 | <<locked>> | 82% | 54,955 psi | 88% | 2615 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,985 psi | 90% | 2680 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,693 psi | 86% | 2726 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 55,390 psi | 89% | 2667 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,188 psi | 90% | 2776 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2864 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 86% | 55,332 psi | 89% | 2697 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,345 psi | 86% | 2762 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,491 psi | 87% | 2812 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,694 psi | 88% | 2818 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,028 psi | 90% | 2717 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,420 psi | 90% | 2740 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,142 psi | 85% | 2776 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,201 psi | 87% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,231 psi | 90% | 2805 fps | 98.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,345 psi | 86% | 2808 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,430 psi | 81% | 2743 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,903 psi | 70% | 2674 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,027 psi | 87% | 2881 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,921 psi | 78% | 2733 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 53,432 psi | 86% | 2687 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,345 psi | 86% | 2808 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 56,333 psi | 90% | 2723 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 84% | 53,780 psi | 86% | 2703 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,694 psi | 88% | 2776 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 54,491 psi | 87% | 2733 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 98% | 54,578 psi | 88% | 2756 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,592 psi | 86% | 2740 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,577 psi | 86% | 2707 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,013 psi | 88% | 2736 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,989 psi | 69% | 2700 fps | 96.6% |
| Hodgdon Superformance | <<locked>> | 90% | 54,636 psi | 88% | 2808 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,448 psi | 58% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,956 psi | 90% | 2703 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,766 psi | 88% | 2680 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,172 psi | 87% | 2667 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 53,940 psi | 86% | 2707 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,737 psi | 88% | 2703 fps | 99.3% |
| IMR 4831 | <<locked>> | 94% | 56,289 psi | 90% | 2762 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,346 psi | 87% | 2720 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,333 psi | 90% | 2746 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,837 psi | 83% | 2782 fps | 96.8% |
| Lovex S062 | <<locked>> | 84% | 55,274 psi | 89% | 2677 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,795 psi | 88% | 2700 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 55,941 psi | 90% | 2740 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,715 psi | 72% | 2585 fps | 98.7% |
| Norma 201 | <<locked>> | 82% | 56,376 psi | 90% | 2684 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,695 psi | 89% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,389 psi | 87% | 2756 fps | 98.2% |
| Norma MRP | <<locked>> | 98% | 53,055 psi | 85% | 2835 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 54,679 psi | 88% | 2759 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 52,924 psi | 85% | 2707 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,112 psi | 84% | 2795 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 92% | 53,374 psi | 86% | 2759 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,601 psi | 75% | 2680 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 60% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,838 psi | 86% | 2690 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,940 psi | 86% | 2792 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,796 psi | 89% | 2799 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,288 psi | 87% | 2825 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,757 psi | 69% | 2694 fps | 97.7% |
| Rottweil R 902 | <<locked>> | 82% | 53,853 psi | 86% | 2641 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,635 psi | 86% | 2684 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,998 psi | 88% | 2733 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 98% | 55,477 psi | 89% | 2795 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 90% | 56,333 psi | 90% | 2723 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,795 psi | 88% | 2700 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 55,274 psi | 89% | 2677 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,941 psi | 90% | 2740 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,172 psi | 88% | 2743 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,173 psi | 90% | 2717 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,578 psi | 88% | 2572 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,462 psi | 87% | 2654 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,984 psi | 88% | 2789 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 53,679 psi | 86% | 2680 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,287 psi | 85% | 2677 fps | 96.2% |
| Somchem S365 | <<locked>> | 94% | 53,969 psi | 87% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,144 psi | 90% | 2769 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 53,983 psi | 87% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,215 psi | 87% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,839 psi | 88% | 2657 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,127 psi | 85% | 2700 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,793 psi | 83% | 2690 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 84% | 55,782 psi | 89% | 2657 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,970 psi | 90% | 2759 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,405 psi | 90% | 2815 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,403 psi | 86% | 2825 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,289 psi | 90% | 2720 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,694 psi | 88% | 2776 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,469 psi | 73% | 2799 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,405 psi | 90% | 2723 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,405 psi | 90% | 2766 fps | 98.5% |
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 2495 | <<locked>> | 80% | 51,517 psi | 83% | 2569 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,211 psi | 79% | 2579 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 33,417 psi | 54% | 2359 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 48,791 psi | 78% | 2575 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,246 psi | 60% | 2454 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 98% | 51,880 psi | 83% | 2802 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 46,151 psi | 74% | 2556 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 41,234 psi | 66% | 2543 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 47,834 psi | 77% | 2697 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,923 psi | 82% | 2762 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,673 psi | 75% | 2579 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,777 psi | 80% | 2644 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,260 psi | 58% | 2461 fps | 98.6% |
| Alliant Reloder-17 | 46.6 gr | 80% | 41,162 psi | 66% | 2582 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,741 psi | 65% | 2536 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,930 psi | 66% | 2585 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,614 psi | 43% | 2231 fps | 96.4% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,126 psi | 52% | 2398 fps | 95.5% |
| Alliant Reloder-26 | 48.9 gr | 82% | 30,284 psi | 49% | 2392 fps | 95.6% |
| Bofors RP15 | <<locked>> | 94% | 40,379 psi | 65% | 2572 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 46,963 psi | 75% | 2589 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,930 psi | 66% | 2585 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 41,394 psi | 66% | 2467 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 47,369 psi | 76% | 2602 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 39,247 psi | 63% | 2500 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 42,163 psi | 68% | 2520 fps | 96% |
| Hodgdon H4831 | <<locked>> | 94% | 47,892 psi | 77% | 2648 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,227 psi | 81% | 2687 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,794 psi | 54% | 2359 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,605 psi | 83% | 2687 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,379 psi | 65% | 2641 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 38,000 psi | 61% | 2507 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 44% | 1496 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,576 psi | 84% | 2654 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,501 psi | 78% | 2585 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,633 psi | 81% | 2612 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 37,086 psi | 59% | 2402 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,801 psi | 69% | 2500 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 35,810 psi | 57% | 2411 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 51,053 psi | 82% | 2671 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,777 psi | 80% | 2644 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 96% | 45,498 psi | 73% | 2667 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 48,762 psi | 78% | 2582 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,190 psi | 64% | 2448 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 38,464 psi | 62% | 2431 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 32,401 psi | 52% | 2333 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 52,953 psi | 85% | 2635 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,124 psi | 79% | 2631 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,495 psi | 67% | 2530 fps | 95.2% |
| Norma MRP | <<locked>> | 88% | 37,623 psi | 60% | 2543 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 37,043 psi | 59% | 2448 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 49,414 psi | 79% | 2651 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 45,237 psi | 73% | 2674 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 35,795 psi | 57% | 2434 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 96% | 40,190 psi | 64% | 2556 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 44% | 1529 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,340 psi | 76% | 2585 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,743 psi | 70% | 2635 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,898 psi | 59% | 2470 fps | 98.1% |
| ReloadSwiss RS 70 | 47.3 gr | 80% | 35,926 psi | 58% | 2477 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,188 psi | 60% | 2562 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 50,546 psi | 81% | 2592 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,135 psi | 71% | 2536 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 45,426 psi | 73% | 2575 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 39,929 psi | 64% | 2520 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 41,394 psi | 66% | 2467 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,190 psi | 64% | 2448 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 48,762 psi | 78% | 2582 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,464 psi | 62% | 2431 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,136 psi | 72% | 2589 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,547 psi | 84% | 2664 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,556 psi | 73% | 2448 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,407 psi | 63% | 2398 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,552 psi | 63% | 2516 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 44,425 psi | 71% | 2536 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,821 psi | 80% | 2621 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 33,605 psi | 54% | 2411 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 37,869 psi | 61% | 2451 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 50,879 psi | 82% | 2556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,894 psi | 82% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,467 psi | 68% | 2470 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,435 psi | 62% | 2448 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 39,929 psi | 64% | 2487 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,313 psi | 79% | 2569 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,985 psi | 61% | 2451 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 29,240 psi | 47% | 2303 fps | 96.5% |
| Vihtavuori N560 | <<locked>> | 96% | 49,821 psi | 80% | 2762 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,594 psi | 60% | 2421 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 39,247 psi | 63% | 2500 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,092 psi | 40% | 2260 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,721 psi | 85% | 2671 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,598 psi | 68% | 2543 fps | 95.7% |
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 92 powders for .270 Win. loaded with the .277 | 156gr | Sako Hammerhead. Alliant Reloder-26 delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,881 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.277" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .270 Win. with the .277 | 156gr | Sako Hammerhead 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.