Load Specifications
Load data in caliber .270 Win. with .277 | 150gr | Speer Deep Curl Soft Point bullet and 95 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-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>> | 82% | 53,650 psi | 86% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,027 psi | 88% | 2717 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,214 psi | 84% | 2756 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 54,027 psi | 87% | 2703 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,520 psi | 87% | 2808 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,128 psi | 87% | 2733 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,666 psi | 89% | 2848 fps | 98.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,214 psi | 85% | 2838 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,185 psi | 85% | 2851 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,042 psi | 88% | 2759 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,085 psi | 88% | 2779 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,405 psi | 89% | 2864 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,866 psi | 85% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,868 psi | 88% | 2835 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,880 psi | 83% | 2835 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,023 psi | 79% | 2776 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,801 psi | 69% | 2697 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,318 psi | 90% | 2966 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,659 psi | 76% | 2759 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 55,840 psi | 90% | 2776 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,880 psi | 83% | 2835 fps | 97.8% |
| Bofors RP7 | <<locked>> | 90% | 55,332 psi | 89% | 2759 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 56,202 psi | 90% | 2789 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 53,185 psi | 85% | 2802 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 53,127 psi | 85% | 2762 fps | 98% |
| Hodgdon H4831 | <<locked>> | 98% | 53,243 psi | 85% | 2782 fps | 95.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,883 psi | 90% | 2825 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,564 psi | 89% | 2785 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,882 psi | 86% | 2776 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,171 psi | 85% | 2838 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 58% | 1706 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,766 psi | 88% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,896 psi | 86% | 2720 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,405 psi | 90% | 2753 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 55,898 psi | 90% | 2789 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,534 psi | 86% | 2733 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 54,998 psi | 88% | 2799 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,084 psi | 85% | 2753 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,172 psi | 88% | 2779 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,531 psi | 81% | 2805 fps | 95.9% |
| Lovex S060 | <<locked>> | 82% | 55,434 psi | 89% | 2703 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,041 psi | 87% | 2713 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,534 psi | 86% | 2733 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 54,520 psi | 87% | 2769 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,250 psi | 69% | 2608 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 55,201 psi | 89% | 2720 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,043 psi | 90% | 2720 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,375 psi | 87% | 2762 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,156 psi | 85% | 2789 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 55,027 psi | 88% | 2917 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 53,185 psi | 85% | 2792 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,187 psi | 88% | 2792 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,691 psi | 81% | 2822 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 94% | 55,477 psi | 89% | 2844 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,252 psi | 73% | 2700 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,028 psi | 59% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,188 psi | 90% | 2776 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,115 psi | 90% | 2844 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,202 psi | 90% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,389 psi | 87% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,953 psi | 85% | 2858 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,524 psi | 67% | 2707 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 84% | 56,086 psi | 90% | 2726 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,695 psi | 89% | 2769 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,824 psi | 86% | 2766 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 53,766 psi | 86% | 2818 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 55,332 psi | 89% | 2759 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,534 psi | 86% | 2733 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 54,041 psi | 87% | 2713 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,520 psi | 87% | 2769 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,751 psi | 86% | 2776 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,926 psi | 88% | 2753 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,043 psi | 90% | 2651 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,476 psi | 86% | 2612 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,156 psi | 85% | 2684 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,287 psi | 85% | 2812 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 55,709 psi | 89% | 2651 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,753 psi | 89% | 2766 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,332 psi | 89% | 2756 fps | 96.2% |
| Somchem S365 | <<locked>> | 96% | 55,811 psi | 89% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,737 psi | 88% | 2802 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 84% | 56,318 psi | 90% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,434 psi | 90% | 2697 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,505 psi | 86% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,463 psi | 89% | 2789 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2720 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 54,781 psi | 88% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,447 psi | 87% | 2792 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,868 psi | 88% | 2848 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,434 psi | 89% | 2907 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,984 psi | 88% | 2756 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,476 psi | 86% | 2808 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,150 psi | 71% | 2825 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,056 psi | 88% | 2759 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,955 psi | 88% | 2795 fps | 98% |
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% | 50,285 psi | 81% | 2605 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,138 psi | 77% | 2608 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 34,780 psi | 56% | 2434 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 47,630 psi | 76% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,158 psi | 58% | 2477 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 45,150 psi | 72% | 2585 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 42,815 psi | 69% | 2621 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 49,864 psi | 80% | 2779 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,530 psi | 79% | 2792 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,614 psi | 73% | 2612 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,646 psi | 78% | 2674 fps | 99.9% |
| Alliant Reloder-16 | 43.5 gr | 80% | 35,389 psi | 57% | 2487 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,016 psi | 64% | 2612 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,438 psi | 68% | 2615 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,511 psi | 68% | 2661 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,918 psi | 42% | 2247 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,185 psi | 53% | 2467 fps | 95.4% |
| Alliant Reloder-26 | 50.5 gr | 84% | 31,662 psi | 51% | 2470 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 41,930 psi | 67% | 2648 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 45,818 psi | 73% | 2621 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,511 psi | 68% | 2661 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 40,495 psi | 65% | 2497 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 46,267 psi | 74% | 2631 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,232 psi | 61% | 2526 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 41,205 psi | 66% | 2546 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 49,908 psi | 80% | 2730 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,359 psi | 84% | 2769 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,851 psi | 53% | 2385 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,314 psi | 81% | 2720 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,827 psi | 64% | 2589 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 44% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,474 psi | 83% | 2690 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,500 psi | 76% | 2618 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,603 psi | 80% | 2644 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 38,551 psi | 62% | 2477 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,901 psi | 67% | 2526 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 34,853 psi | 56% | 2434 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 49,879 psi | 80% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,605 psi | 83% | 2720 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 98% | 47,355 psi | 76% | 2749 fps | 95% |
| Lovex S060 | <<locked>> | 80% | 52,170 psi | 84% | 2657 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,718 psi | 77% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,305 psi | 63% | 2477 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,550 psi | 60% | 2457 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 33,533 psi | 54% | 2405 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 51,866 psi | 83% | 2674 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,649 psi | 84% | 2674 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,993 psi | 77% | 2664 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,323 psi | 69% | 2615 fps | 95.3% |
| Norma MRP | <<locked>> | 90% | 39,059 psi | 63% | 2618 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,056 psi | 58% | 2474 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 48,138 psi | 77% | 2684 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,384 psi | 76% | 2759 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 35,027 psi | 56% | 2461 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 42,061 psi | 67% | 2638 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 44% | 1565 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,238 psi | 74% | 2615 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,591 psi | 84% | 2792 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,540 psi | 68% | 2664 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,766 psi | 57% | 2493 fps | 97.4% |
| ReloadSwiss RS 70 | 47.6 gr | 80% | 34,940 psi | 56% | 2497 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,725 psi | 62% | 2641 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 49,516 psi | 79% | 2628 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,047 psi | 69% | 2569 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 47,413 psi | 76% | 2657 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 41,394 psi | 66% | 2598 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 40,495 psi | 65% | 2497 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,305 psi | 63% | 2477 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 47,718 psi | 77% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,550 psi | 60% | 2457 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,237 psi | 71% | 2621 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,663 psi | 83% | 2703 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,852 psi | 85% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,643 psi | 72% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,508 psi | 62% | 2425 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,002 psi | 66% | 2592 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 52,446 psi | 84% | 2608 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,410 psi | 70% | 2569 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 51,793 psi | 83% | 2700 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 32,605 psi | 52% | 2434 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,421 psi | 63% | 2530 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 49,792 psi | 80% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,806 psi | 80% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,466 psi | 66% | 2500 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,434 psi | 60% | 2474 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 41,292 psi | 66% | 2559 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 48,225 psi | 77% | 2605 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,985 psi | 59% | 2477 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,311 psi | 45% | 2323 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 48,486 psi | 78% | 2789 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,622 psi | 59% | 2448 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,232 psi | 61% | 2526 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,063 psi | 42% | 2333 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,445 psi | 82% | 2707 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,396 psi | 71% | 2621 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 95 powders for .270 Win. loaded with the .277 | 150gr | Speer Deep Curl Soft Point. Alliant Reloder-26 delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,706 fps to 2,966 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 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 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for .270 Win. with the .277 | 150gr | Speer Deep Curl Soft Point 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.