Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:150 gr
Bullet Diameter:0.277"
Bullet Length:<<locked>>
Caliber:.270 Win. load data
Case Length (l3):2.54"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:67 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:10.5
Load data in caliber .270 Win. with .277 | 150gr | Barnes Solid RN bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Hodgdon H414.
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>> | 84% | 55,622 psi | 89% | 2667 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,359 psi | 86% | 2680 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,024 psi | 80% | 2713 fps | 99.1% |
| Accurate 4064 | <<locked>> | 86% | 55,724 psi | 89% | 2720 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,999 psi | 90% | 2818 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,071 psi | 88% | 2749 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,028 psi | 90% | 2749 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,548 psi | 86% | 2802 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,085 psi | 88% | 2871 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,417 psi | 86% | 2726 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,432 psi | 86% | 2743 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,287 psi | 85% | 2822 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,549 psi | 87% | 2851 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,318 psi | 90% | 2848 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,850 psi | 80% | 2792 fps | 97.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,920 psi | 75% | 2733 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,133 psi | 66% | 2651 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,824 psi | 86% | 2923 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,665 psi | 88% | 2762 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,701 psi | 73% | 2717 fps | 96% |
| Bofors RP3 | <<locked>> | 86% | 53,867 psi | 86% | 2740 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,850 psi | 80% | 2792 fps | 97.2% |
| Bofors RP7 | <<locked>> | 90% | 53,606 psi | 86% | 2723 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 86% | 54,375 psi | 87% | 2753 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 54,940 psi | 88% | 2818 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 90% | 54,868 psi | 88% | 2779 fps | 98.1% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 54,940 psi | 88% | 2795 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 55,724 psi | 89% | 2756 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,432 psi | 86% | 2749 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,724 psi | 89% | 2792 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,955 psi | 88% | 2854 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,129 psi | 58% | 1693 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,127 psi | 85% | 2707 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,275 psi | 90% | 2733 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,724 psi | 89% | 2736 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,969 psi | 88% | 2720 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 54,346 psi | 87% | 2753 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,259 psi | 89% | 2749 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 52,939 psi | 85% | 2762 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,839 psi | 88% | 2772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 53,258 psi | 85% | 2736 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 82% | 55,216 psi | 89% | 2720 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,143 psi | 87% | 2677 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,825 psi | 90% | 2730 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,201 psi | 89% | 2746 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 56,318 psi | 90% | 2785 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,669 psi | 67% | 2569 fps | 97.6% |
| Norma 201 | <<locked>> | 82% | 53,795 psi | 86% | 2690 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,273 psi | 87% | 2687 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,217 psi | 90% | 2782 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,853 psi | 88% | 2802 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 52,620 psi | 84% | 2871 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 54,897 psi | 88% | 2805 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,359 psi | 86% | 2756 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,548 psi | 86% | 2805 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,381 psi | 70% | 2651 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,898 psi | 59% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,491 psi | 87% | 2740 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,273 psi | 87% | 2808 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,969 psi | 87% | 2841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,970 psi | 90% | 2844 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,679 psi | 88% | 2871 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,360 psi | 87% | 2690 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,041 psi | 87% | 2736 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,535 psi | 89% | 2779 fps | 96.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,521 psi | 89% | 2835 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 53,606 psi | 86% | 2723 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,201 psi | 89% | 2746 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,216 psi | 89% | 2720 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,825 psi | 90% | 2730 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,318 psi | 90% | 2785 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,709 psi | 89% | 2795 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,159 psi | 90% | 2753 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,388 psi | 86% | 2720 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,549 psi | 87% | 2621 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,390 psi | 89% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,071 psi | 88% | 2700 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,027 psi | 88% | 2828 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 54,375 psi | 87% | 2625 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,695 psi | 89% | 2736 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,186 psi | 87% | 2733 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,548 psi | 86% | 2805 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,217 psi | 90% | 2812 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 82% | 55,056 psi | 88% | 2605 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,679 psi | 88% | 2654 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,781 psi | 88% | 2667 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,506 psi | 89% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,664 psi | 86% | 2753 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,486 psi | 78% | 2677 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 86% | 56,434 psi | 90% | 2710 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,333 psi | 90% | 2808 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,475 psi | 84% | 2805 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,200 psi | 85% | 2858 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,301 psi | 85% | 2723 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,940 psi | 88% | 2818 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,438 psi | 68% | 2782 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,476 psi | 86% | 2726 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,605 psi | 84% | 2746 fps | 97.4% |
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% | 48,689 psi | 78% | 2575 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,021 psi | 75% | 2575 fps | 97% |
| Accurate 3100 | <<locked>> | 90% | 35,665 psi | 57% | 2448 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 46,122 psi | 74% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,838 psi | 56% | 2441 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 80% | 51,721 psi | 83% | 2697 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,874 psi | 70% | 2552 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,193 psi | 71% | 2638 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,921 psi | 77% | 2753 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,237 psi | 71% | 2579 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,239 psi | 76% | 2644 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,214 psi | 55% | 2448 fps | 97.4% |
| Alliant Reloder-17 | 45.4 gr | 80% | 38,609 psi | 62% | 2572 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,743 psi | 70% | 2631 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,671 psi | 70% | 2677 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,672 psi | 43% | 2264 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,156 psi | 55% | 2484 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,474 psi | 52% | 2487 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,343 psi | 82% | 2710 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 42,815 psi | 69% | 2657 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 44,135 psi | 71% | 2585 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 43,671 psi | 70% | 2677 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 39,320 psi | 63% | 2461 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 44,701 psi | 72% | 2592 fps | 99% |
| Hodgdon H414 | 44.4 gr | 80% | 36,782 psi | 59% | 2484 fps | 95% |
| Hodgdon H4350 | <<locked>> | 82% | 42,424 psi | 68% | 2559 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 98% | 51,343 psi | 82% | 2740 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 52,257 psi | 84% | 2707 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,879 psi | 51% | 2352 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,631 psi | 78% | 2687 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 38,450 psi | 62% | 2549 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 43% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,806 psi | 80% | 2654 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,605 psi | 84% | 2684 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,151 psi | 74% | 2585 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,443 psi | 78% | 2612 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 39,740 psi | 64% | 2493 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,741 psi | 65% | 2493 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 33,605 psi | 54% | 2398 fps | 97% |
| IMR 4895 | <<locked>> | 80% | 48,457 psi | 78% | 2671 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 49,980 psi | 80% | 2684 fps | 95% |
| Lovex D073.6 | <<locked>> | 80% | 51,692 psi | 83% | 2671 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,821 psi | 81% | 2625 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,340 psi | 74% | 2585 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,101 psi | 61% | 2441 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 36,390 psi | 58% | 2421 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 34,330 psi | 55% | 2418 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 50,415 psi | 81% | 2641 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,169 psi | 82% | 2644 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,615 psi | 75% | 2631 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,918 psi | 72% | 2631 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 37,521 psi | 60% | 2575 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,780 psi | 56% | 2438 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 46,601 psi | 75% | 2651 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,056 psi | 58% | 2477 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 40,480 psi | 65% | 2592 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,586 psi | 44% | 1552 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,817 psi | 72% | 2579 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,763 psi | 81% | 2753 fps | 100% |
| ReloadSwiss RS 60 | 45.4 gr | 80% | 41,031 psi | 66% | 2628 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,345 psi | 55% | 2454 fps | 96.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 33,823 psi | 54% | 2457 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 48,066 psi | 77% | 2595 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,669 psi | 67% | 2536 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 48,733 psi | 78% | 2671 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 92% | 42,598 psi | 68% | 2615 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 39,320 psi | 63% | 2461 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,101 psi | 61% | 2441 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,692 psi | 83% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,340 psi | 74% | 2585 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,390 psi | 58% | 2421 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,714 psi | 68% | 2585 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,388 psi | 84% | 2697 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,096 psi | 80% | 2667 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,387 psi | 82% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,279 psi | 69% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,420 psi | 60% | 2388 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,192 psi | 68% | 2608 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 51,068 psi | 82% | 2579 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,272 psi | 84% | 2687 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,061 psi | 67% | 2533 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,227 psi | 50% | 2395 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 40,495 psi | 65% | 2543 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 51,895 psi | 83% | 2566 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,109 psi | 77% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,428 psi | 78% | 2579 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,205 psi | 64% | 2470 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,216 psi | 58% | 2441 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 96% | 42,438 psi | 68% | 2569 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 46,702 psi | 75% | 2572 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,621 psi | 57% | 2438 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 29,080 psi | 47% | 2339 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 98% | 49,777 psi | 80% | 2799 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,534 psi | 57% | 2415 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 37,028 psi | 59% | 2490 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,658 psi | 43% | 2346 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,879 psi | 80% | 2674 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 42,815 psi | 69% | 2582 fps | 95% |
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 98 powders for .270 Win. loaded with the .277 | 150gr | Barnes Solid RN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,693 fps to 2,923 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 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 150.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-19, Alliant Reloder-22 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. Alliant Reloder-17, ReloadSwiss RS 60, Hodgdon H414 rank at the top here: for .270 Win. with the .277 | 150gr | Barnes Solid RN 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.