Load Specifications
Load data in caliber .270 Win. with .277 | 150gr | Nosler Ballistic Tip Hunting bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 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.
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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% | 2671 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,940 psi | 88% | 2700 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,256 psi | 81% | 2720 fps | 99.1% |
| Accurate 4064 | <<locked>> | 86% | 56,028 psi | 90% | 2726 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,275 psi | 90% | 2825 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,056 psi | 88% | 2749 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,333 psi | 90% | 2759 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,780 psi | 86% | 2812 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,405 psi | 89% | 2877 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,374 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,693 psi | 86% | 2749 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,577 psi | 86% | 2828 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,839 psi | 88% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,997 psi | 85% | 2799 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,082 psi | 80% | 2799 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,152 psi | 76% | 2740 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,307 psi | 66% | 2661 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,027 psi | 87% | 2927 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,969 psi | 88% | 2769 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,905 psi | 74% | 2723 fps | 96.1% |
| Bofors RP3 | <<locked>> | 86% | 54,157 psi | 87% | 2746 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,082 psi | 80% | 2799 fps | 97.3% |
| Bofors RP7 | <<locked>> | 90% | 53,882 psi | 86% | 2730 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 86% | 54,621 psi | 88% | 2759 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 52,620 psi | 84% | 2789 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 92% | 53,548 psi | 86% | 2759 fps | 98% |
| Hodgdon H4895 | <<locked>> | 82% | 55,695 psi | 89% | 2759 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,650 psi | 86% | 2756 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,043 psi | 90% | 2799 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,201 psi | 89% | 2861 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,230 psi | 58% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,941 psi | 90% | 2749 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,940 psi | 88% | 2717 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,042 psi | 88% | 2730 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,288 psi | 87% | 2710 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 54,592 psi | 88% | 2759 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,463 psi | 89% | 2756 fps | 99% |
| IMR 4831 | <<locked>> | 98% | 54,157 psi | 87% | 2779 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,114 psi | 88% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 53,461 psi | 86% | 2743 fps | 95.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,881 psi | 85% | 2835 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 82% | 55,506 psi | 89% | 2726 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,099 psi | 87% | 2677 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,811 psi | 89% | 2733 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,419 psi | 89% | 2753 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 53,113 psi | 85% | 2740 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,640 psi | 67% | 2572 fps | 97.6% |
| Norma 201 | <<locked>> | 82% | 54,085 psi | 87% | 2700 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,563 psi | 87% | 2694 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,997 psi | 85% | 2736 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,100 psi | 88% | 2808 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2881 fps | 99% |
| Norma URP | <<locked>> | 94% | 55,114 psi | 88% | 2812 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,621 psi | 86% | 2762 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,434 psi | 90% | 2904 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 94% | 53,795 psi | 86% | 2812 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,863 psi | 78% | 2756 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,724 psi | 59% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,781 psi | 88% | 2746 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,592 psi | 88% | 2815 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,201 psi | 87% | 2848 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,231 psi | 90% | 2851 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,911 psi | 88% | 2877 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,679 psi | 88% | 2697 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,331 psi | 87% | 2743 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,767 psi | 89% | 2785 fps | 96.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,767 psi | 89% | 2841 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 53,882 psi | 86% | 2730 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,419 psi | 89% | 2753 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,506 psi | 89% | 2726 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,811 psi | 89% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,113 psi | 85% | 2740 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,637 psi | 89% | 2799 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,434 psi | 90% | 2759 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,664 psi | 86% | 2723 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,853 psi | 88% | 2628 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,651 psi | 89% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,317 psi | 89% | 2707 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,259 psi | 89% | 2835 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 54,650 psi | 88% | 2631 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,927 psi | 90% | 2743 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,128 psi | 87% | 2736 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,838 psi | 86% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,866 psi | 85% | 2762 fps | 98.4% |
| Unknown powder | <<locked>> | 92% | 55,970 psi | 90% | 2818 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 55,361 psi | 89% | 2612 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,665 psi | 88% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,085 psi | 88% | 2674 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,434 psi | 89% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,940 psi | 86% | 2759 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2684 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 53,287 psi | 85% | 2671 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,246 psi | 90% | 2812 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,736 psi | 85% | 2815 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 2871 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,519 psi | 86% | 2730 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,620 psi | 84% | 2789 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,612 psi | 68% | 2789 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,868 psi | 88% | 2785 fps | 97.8% |
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 2495 | <<locked>> | 80% | 49,008 psi | 79% | 2582 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,221 psi | 68% | 2484 fps | 95.9% |
| Accurate 3100 | <<locked>> | 88% | 33,475 psi | 54% | 2402 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,354 psi | 74% | 2585 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,853 psi | 56% | 2444 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 80% | 51,706 psi | 83% | 2700 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,135 psi | 71% | 2562 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,411 psi | 71% | 2644 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,211 psi | 77% | 2762 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,222 psi | 71% | 2582 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,239 psi | 76% | 2648 fps | 99.9% |
| Alliant Reloder-16 | 42.3 gr | 80% | 34,418 psi | 55% | 2457 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,827 psi | 62% | 2582 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,918 psi | 70% | 2641 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,888 psi | 70% | 2684 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,832 psi | 43% | 2274 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,330 psi | 55% | 2493 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,648 psi | 52% | 2493 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,300 psi | 82% | 2713 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,018 psi | 69% | 2667 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 44,411 psi | 71% | 2592 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 43,888 psi | 70% | 2684 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 39,305 psi | 63% | 2464 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 44,962 psi | 72% | 2602 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 40,045 psi | 64% | 2559 fps | 96.2% |
| Hodgdon H4350 | <<locked>> | 84% | 41,669 psi | 67% | 2549 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 52,257 psi | 84% | 2710 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,879 psi | 51% | 2356 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,093 psi | 74% | 2648 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 38,653 psi | 62% | 2556 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 43% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,398 psi | 74% | 2602 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 48,573 psi | 78% | 2628 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,192 psi | 69% | 2536 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,612 psi | 68% | 2507 fps | 96.8% |
| IMR 4350 | <<locked>> | 84% | 39,943 psi | 64% | 2500 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,727 psi | 65% | 2497 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 30,632 psi | 49% | 2326 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 48,457 psi | 78% | 2674 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,198 psi | 80% | 2687 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 49,487 psi | 79% | 2776 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 80% | 52,011 psi | 83% | 2680 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,082 psi | 82% | 2631 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,601 psi | 75% | 2592 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,319 psi | 61% | 2451 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 36,622 psi | 59% | 2431 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 34,519 psi | 55% | 2425 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 50,720 psi | 81% | 2648 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,169 psi | 82% | 2644 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,615 psi | 75% | 2635 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,904 psi | 72% | 2635 fps | 95.5% |
| Norma MRP | <<locked>> | 90% | 37,724 psi | 60% | 2585 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 35,027 psi | 56% | 2448 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 46,905 psi | 75% | 2657 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 48,747 psi | 78% | 2772 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 33,982 psi | 54% | 2428 fps | 95% |
| Ramshot Magnum | <<locked>> | 96% | 42,235 psi | 68% | 2631 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 44% | 1549 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,078 psi | 72% | 2585 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,068 psi | 82% | 2762 fps | 100% |
| ReloadSwiss RS 60 | 45.6 gr | 80% | 41,292 psi | 66% | 2635 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,548 psi | 55% | 2461 fps | 96.9% |
| ReloadSwiss RS 70 | 46.3 gr | 80% | 33,997 psi | 55% | 2464 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,341 psi | 78% | 2605 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,916 psi | 67% | 2543 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 94% | 48,950 psi | 78% | 2677 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 42,830 psi | 69% | 2621 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 39,305 psi | 63% | 2464 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,319 psi | 61% | 2451 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,011 psi | 83% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,601 psi | 75% | 2592 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,622 psi | 59% | 2431 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,960 psi | 69% | 2592 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,634 psi | 84% | 2703 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,372 psi | 81% | 2677 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,663 psi | 83% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,526 psi | 70% | 2461 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,434 psi | 60% | 2392 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,424 psi | 68% | 2615 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,372 psi | 82% | 2585 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,228 psi | 84% | 2690 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,322 psi | 68% | 2543 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,430 psi | 50% | 2402 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 40,741 psi | 65% | 2549 fps | 95.7% |
| Unknown powder | <<locked>> | 80% | 37,652 psi | 60% | 2497 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 80% | 52,185 psi | 84% | 2572 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,457 psi | 78% | 2572 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,733 psi | 78% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,437 psi | 65% | 2477 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,230 psi | 58% | 2441 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 96% | 42,598 psi | 68% | 2575 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 46,949 psi | 75% | 2579 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,824 psi | 57% | 2444 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 29,298 psi | 47% | 2349 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 98% | 49,966 psi | 80% | 2805 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,491 psi | 57% | 2418 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 40,045 psi | 64% | 2559 fps | 96.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,193 psi | 40% | 2293 fps | 95.1% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,338 psi | 71% | 2612 fps | 95.5% |
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 111 powders for .270 Win. loaded with the .277 | 150gr | Nosler Ballistic Tip Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,927 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:10.0 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 60, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for .270 Win. with the .277 | 150gr | Nosler Ballistic Tip Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2225, Baschieri & Pellagri 109 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.