Load Specifications
Load data in caliber .270 Win. with .277 | 150gr | Sierra RN Prohunter 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% | 54,607 psi | 88% | 2667 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,695 psi | 89% | 2736 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,476 psi | 86% | 2779 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 54,998 psi | 88% | 2723 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,622 psi | 89% | 2828 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2910 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 55,201 psi | 89% | 2756 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,011 psi | 85% | 2815 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,273 psi | 87% | 2861 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,346 psi | 87% | 2874 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,869 psi | 90% | 2776 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,231 psi | 90% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,707 psi | 85% | 2828 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,940 psi | 86% | 2851 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,724 psi | 89% | 2858 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,055 psi | 85% | 2858 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,951 psi | 80% | 2795 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,482 psi | 70% | 2717 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,534 psi | 86% | 2930 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,486 psi | 78% | 2782 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 53,214 psi | 85% | 2743 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,055 psi | 85% | 2858 fps | 98.1% |
| Bofors RP7 | <<locked>> | 90% | 55,999 psi | 90% | 2776 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 53,519 psi | 86% | 2756 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,172 psi | 87% | 2822 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 54,143 psi | 87% | 2785 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 98% | 54,375 psi | 87% | 2808 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,142 psi | 85% | 2789 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,113 psi | 85% | 2759 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,708 psi | 88% | 2792 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,099 psi | 87% | 2858 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 59% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,579 psi | 89% | 2756 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,708 psi | 88% | 2736 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,766 psi | 86% | 2717 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 53,461 psi | 86% | 2756 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,215 psi | 87% | 2753 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 55,985 psi | 90% | 2818 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,998 psi | 87% | 2772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,970 psi | 90% | 2799 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,619 psi | 83% | 2831 fps | 96.4% |
| Lovex S060 | <<locked>> | 82% | 56,246 psi | 90% | 2723 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,882 psi | 88% | 2730 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,476 psi | 87% | 2753 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 55,492 psi | 89% | 2789 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,425 psi | 71% | 2635 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 56,086 psi | 90% | 2740 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,521 psi | 89% | 2785 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,085 psi | 87% | 2808 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 56,231 psi | 90% | 2940 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 54,172 psi | 87% | 2808 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,231 psi | 90% | 2812 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,721 psi | 83% | 2844 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 92% | 53,026 psi | 85% | 2812 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,224 psi | 74% | 2723 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,999 psi | 59% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,505 psi | 86% | 2743 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,476 psi | 86% | 2844 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,419 psi | 89% | 2851 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,853 psi | 86% | 2874 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,525 psi | 68% | 2736 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 53,577 psi | 86% | 2694 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,374 psi | 86% | 2740 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,723 psi | 88% | 2785 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 98% | 55,056 psi | 88% | 2844 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 90% | 55,999 psi | 90% | 2776 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,476 psi | 87% | 2753 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 54,882 psi | 88% | 2730 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,492 psi | 89% | 2789 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,781 psi | 88% | 2795 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,709 psi | 89% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,273 psi | 87% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,012 psi | 87% | 2707 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,563 psi | 87% | 2838 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 53,243 psi | 85% | 2733 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,333 psi | 90% | 2779 fps | 96.5% |
| Somchem S365 | <<locked>> | 94% | 53,621 psi | 86% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,666 psi | 89% | 2818 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 53,751 psi | 86% | 2654 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,867 psi | 86% | 2671 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,578 psi | 88% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,011 psi | 85% | 2756 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,547 psi | 83% | 2743 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 55,535 psi | 89% | 2713 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,434 psi | 89% | 2812 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,898 psi | 90% | 2867 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 52,808 psi | 85% | 2871 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,144 psi | 90% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,447 psi | 87% | 2828 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,194 psi | 72% | 2851 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,101 psi | 90% | 2779 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,086 psi | 90% | 2818 fps | 98.3% |
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% | 51,271 psi | 82% | 2621 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,095 psi | 79% | 2631 fps | 97.8% |
| Accurate 3100 | <<locked>> | 86% | 33,185 psi | 53% | 2402 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 48,588 psi | 78% | 2628 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,956 psi | 59% | 2500 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 98% | 51,459 psi | 83% | 2851 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 45,948 psi | 74% | 2608 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 43,642 psi | 70% | 2644 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 96% | 47,485 psi | 76% | 2743 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,633 psi | 81% | 2815 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,195 psi | 74% | 2625 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,501 psi | 79% | 2697 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,071 psi | 58% | 2510 fps | 98.2% |
| Alliant Reloder-17 | 47.7 gr | 80% | 40,741 psi | 65% | 2628 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,265 psi | 69% | 2638 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,712 psi | 65% | 2631 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,440 psi | 42% | 2270 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,837 psi | 54% | 2490 fps | 95.9% |
| Alliant Reloder-26 | 50.1 gr | 82% | 30,037 psi | 48% | 2428 fps | 95% |
| Bofors RP15 | <<locked>> | 96% | 42,743 psi | 69% | 2671 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 46,630 psi | 75% | 2641 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,712 psi | 65% | 2631 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 40,973 psi | 66% | 2510 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 80% | 47,036 psi | 75% | 2651 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 38,943 psi | 62% | 2543 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 80% | 41,872 psi | 67% | 2566 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 96% | 50,720 psi | 81% | 2749 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,821 psi | 80% | 2733 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,605 psi | 54% | 2405 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,126 psi | 82% | 2740 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 37,710 psi | 60% | 2546 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 44% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,982 psi | 83% | 2703 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,341 psi | 78% | 2638 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,343 psi | 81% | 2664 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 39,233 psi | 63% | 2497 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,337 psi | 68% | 2543 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 35,563 psi | 57% | 2454 fps | 97.8% |
| IMR 4895 | <<locked>> | 80% | 50,734 psi | 81% | 2723 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,603 psi | 80% | 2694 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 98% | 48,385 psi | 78% | 2772 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 52,692 psi | 84% | 2671 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,283 psi | 77% | 2631 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,030 psi | 64% | 2497 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 38,261 psi | 61% | 2477 fps | 96.1% |
| Lovex S071 | <<locked>> | 92% | 34,403 psi | 55% | 2428 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 52,736 psi | 85% | 2690 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,834 psi | 78% | 2684 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,222 psi | 71% | 2635 fps | 95.7% |
| Norma MRP | <<locked>> | 88% | 37,217 psi | 60% | 2582 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 36,811 psi | 59% | 2493 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 49,182 psi | 79% | 2707 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,428 psi | 78% | 2785 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 35,665 psi | 57% | 2480 fps | 96% |
| Ramshot Magnum | <<locked>> | 96% | 39,972 psi | 64% | 2598 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,659 psi | 44% | 1568 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,949 psi | 75% | 2635 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,279 psi | 69% | 2680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,695 psi | 59% | 2516 fps | 97.8% |
| ReloadSwiss RS 70 | 48.5 gr | 80% | 35,737 psi | 57% | 2523 fps | 97.1% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,726 psi | 64% | 2671 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 50,386 psi | 81% | 2648 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,888 psi | 70% | 2589 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,298 psi | 77% | 2680 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 42,308 psi | 68% | 2621 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 40,973 psi | 66% | 2510 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,030 psi | 64% | 2497 fps | 97.7% |
| Shooters World Precision | <<locked>> | 80% | 48,283 psi | 77% | 2631 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,261 psi | 61% | 2477 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,034 psi | 72% | 2641 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,446 psi | 84% | 2720 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,208 psi | 72% | 2497 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,175 psi | 63% | 2444 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,916 psi | 67% | 2615 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 44,222 psi | 71% | 2585 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,414 psi | 79% | 2667 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 33,156 psi | 53% | 2451 fps | 99.6% |
| Somchem S385 | <<locked>> | 88% | 40,263 psi | 65% | 2552 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 50,444 psi | 81% | 2608 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,676 psi | 81% | 2625 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,206 psi | 68% | 2520 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,189 psi | 61% | 2493 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 39,494 psi | 63% | 2526 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 48,965 psi | 79% | 2618 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,666 psi | 60% | 2497 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 29,008 psi | 47% | 2343 fps | 96% |
| Vihtavuori N560 | <<locked>> | 96% | 49,574 psi | 79% | 2812 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,188 psi | 60% | 2461 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 38,943 psi | 62% | 2543 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,831 psi | 40% | 2290 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,518 psi | 84% | 2726 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,322 psi | 68% | 2589 fps | 95.2% |
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 92 powders for .270 Win. loaded with the .277 | 150gr | Sierra RN Prohunter. Norma MRP delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,940 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 59–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:13.0 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 | 150gr | Sierra RN Prohunter 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.