Load Specifications
Load data in caliber .270 Win. with .277 | 140gr | Peregrine VLR-4 Compact bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance 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.
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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 2015 | <<locked>> | 82% | 55,027 psi | 88% | 2723 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 53,592 psi | 86% | 2746 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,637 psi | 89% | 2818 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,011 psi | 85% | 2759 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,831 psi | 72% | 2717 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 54,056 psi | 87% | 2799 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,317 psi | 87% | 2890 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 54,389 psi | 87% | 2835 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,550 psi | 89% | 2838 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,736 psi | 85% | 2874 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,243 psi | 85% | 2782 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,563 psi | 87% | 2756 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,433 psi | 87% | 2956 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,637 psi | 89% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,072 psi | 90% | 2877 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,550 psi | 89% | 2953 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,243 psi | 85% | 2930 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,677 psi | 83% | 2861 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,453 psi | 68% | 2743 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,051 psi | 77% | 2917 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,201 psi | 87% | 2848 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 56,260 psi | 90% | 2871 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,130 psi | 90% | 2848 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,679 psi | 88% | 2762 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,304 psi | 90% | 2861 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,679 psi | 86% | 2838 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 94% | 53,737 psi | 86% | 2894 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 92% | 54,027 psi | 87% | 2854 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 84% | 54,955 psi | 88% | 2844 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,550 psi | 89% | 2874 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,694 psi | 88% | 2877 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,824 psi | 86% | 2923 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,650 psi | 57% | 1742 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,159 psi | 90% | 2844 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,347 psi | 89% | 2822 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,824 psi | 88% | 2818 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,607 psi | 88% | 2799 fps | 98.4% |
| IMR 4350 | <<locked>> | 96% | 53,200 psi | 85% | 2822 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,752 psi | 88% | 2828 fps | 98.3% |
| IMR 4831 | <<locked>> | 98% | 55,172 psi | 88% | 2887 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 53,882 psi | 86% | 2854 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,243 psi | 85% | 2782 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,998 psi | 87% | 2805 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,534 psi | 86% | 2759 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,636 psi | 88% | 2812 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,273 psi | 87% | 2822 fps | 99.2% |
| Lovex S070 | <<locked>> | 96% | 55,288 psi | 89% | 2861 fps | 98.7% |
| Norma 201 | <<locked>> | 86% | 56,188 psi | 90% | 2822 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,505 psi | 86% | 2776 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,288 psi | 89% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,896 psi | 86% | 2874 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 47,688 psi | 76% | 2871 fps | 97.2% |
| Norma URP | <<locked>> | 96% | 53,606 psi | 86% | 2881 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 88% | 56,173 psi | 90% | 2894 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,898 psi | 90% | 2933 fps | 99.3% |
| Ramshot TAC | <<locked>> | 82% | 53,171 psi | 85% | 2799 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,084 psi | 85% | 2818 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,303 psi | 58% | 1788 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,708 psi | 86% | 2815 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,084 psi | 85% | 2890 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,026 psi | 85% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,331 psi | 87% | 2917 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,577 psi | 86% | 2946 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 53,693 psi | 86% | 2756 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,505 psi | 86% | 2776 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,101 psi | 90% | 2864 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,575 psi | 81% | 2844 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 94% | 56,130 psi | 90% | 2848 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,273 psi | 87% | 2822 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,998 psi | 87% | 2805 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,636 psi | 88% | 2812 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,288 psi | 89% | 2861 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,636 psi | 88% | 2877 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,608 psi | 89% | 2835 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,620 psi | 84% | 2802 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,244 psi | 87% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,940 psi | 88% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,331 psi | 87% | 2776 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,096 psi | 80% | 2838 fps | 96.3% |
| Somchem S335 | <<locked>> | 84% | 53,795 psi | 86% | 2713 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,172 psi | 88% | 2825 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,420 psi | 90% | 2861 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,608 psi | 89% | 2933 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,256 psi | 82% | 2825 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 84% | 54,694 psi | 88% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,432 psi | 86% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,056 psi | 87% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,288 psi | 87% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,912 psi | 90% | 2877 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 82% | 53,635 psi | 86% | 2779 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,014 psi | 90% | 2802 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,766 psi | 88% | 2881 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,079 psi | 75% | 2818 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,217 psi | 90% | 2858 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,969 psi | 87% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,737 psi | 86% | 2894 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,927 psi | 61% | 2762 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,591 psi | 84% | 2808 fps | 100% |
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 2015 | <<locked>> | 80% | 51,779 psi | 83% | 2680 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,048 psi | 71% | 2605 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,025 psi | 83% | 2766 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,308 psi | 69% | 2592 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 36,318 psi | 58% | 2546 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 41,713 psi | 67% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,141 psi | 53% | 2490 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 47,703 psi | 76% | 2723 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 40,683 psi | 65% | 2579 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 49,255 psi | 79% | 2815 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,864 psi | 80% | 2730 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,850 psi | 82% | 2703 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,816 psi | 70% | 2769 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,364 psi | 65% | 2598 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,294 psi | 69% | 2661 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,270 psi | 50% | 2448 fps | 95% |
| Alliant Reloder-17 | 45.1 gr | 80% | 34,940 psi | 56% | 2572 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,399 psi | 78% | 2802 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,906 psi | 46% | 2411 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,344 psi | 53% | 2589 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,297 psi | 76% | 2736 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 40,176 psi | 64% | 2602 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 43,613 psi | 70% | 2635 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,576 psi | 83% | 2717 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,081 psi | 79% | 2753 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,017 psi | 66% | 2612 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 41,017 psi | 66% | 2661 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 86% | 44,643 psi | 72% | 2687 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 48,182 psi | 77% | 2736 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,616 psi | 46% | 2349 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,440 psi | 71% | 2710 fps | 99.9% |
| Hodgdon Superformance | 52.5 gr | 88% | 43,424 psi | 70% | 2736 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 43% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,354 psi | 74% | 2690 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 48,443 psi | 78% | 2723 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,757 psi | 69% | 2615 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,947 psi | 72% | 2631 fps | 96.5% |
| IMR 4350 | <<locked>> | 90% | 44,005 psi | 71% | 2661 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,540 psi | 68% | 2612 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 32,184 psi | 52% | 2448 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 44,367 psi | 71% | 2694 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 49,864 psi | 80% | 2730 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,137 psi | 76% | 2700 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,572 psi | 76% | 2661 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 42,641 psi | 68% | 2612 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,072 psi | 59% | 2503 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 40,030 psi | 64% | 2585 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 46,644 psi | 75% | 2674 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,094 psi | 76% | 2677 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,656 psi | 68% | 2651 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 47,007 psi | 75% | 2756 fps | 95% |
| Norma MRP | <<locked>> | 96% | 41,611 psi | 67% | 2749 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 33,504 psi | 54% | 2493 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 42,540 psi | 68% | 2667 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 37,478 psi | 60% | 2592 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 49,908 psi | 80% | 2746 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,748 psi | 80% | 2762 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,977 psi | 43% | 1598 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,379 psi | 66% | 2595 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,209 psi | 74% | 2772 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,217 psi | 60% | 2638 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,996 psi | 53% | 2507 fps | 95.3% |
| ReloadSwiss RS 70 | 48.1 gr | 84% | 35,201 psi | 56% | 2569 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 50,604 psi | 81% | 2710 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,382 psi | 71% | 2628 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 37,811 psi | 61% | 2549 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 47,137 psi | 76% | 2785 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 86% | 43,613 psi | 70% | 2635 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,072 psi | 59% | 2503 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,137 psi | 76% | 2700 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,641 psi | 68% | 2612 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,030 psi | 64% | 2585 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,870 psi | 62% | 2598 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,399 psi | 78% | 2723 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,224 psi | 74% | 2697 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,964 psi | 77% | 2621 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,074 psi | 64% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,524 psi | 67% | 2556 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,673 psi | 75% | 2779 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 47,558 psi | 76% | 2621 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,138 psi | 77% | 2717 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 38,493 psi | 62% | 2552 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 28,007 psi | 45% | 2385 fps | 97.1% |
| Somchem S385 | <<locked>> | 94% | 41,814 psi | 67% | 2651 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 48,443 psi | 78% | 2612 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,237 psi | 71% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,846 psi | 72% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,753 psi | 59% | 2490 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 32,663 psi | 52% | 2441 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 50,154 psi | 80% | 2726 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,163 psi | 69% | 2605 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,256 psi | 52% | 2441 fps | 95% |
| Vihtavuori N555 | <<locked>> | 88% | 31,357 psi | 50% | 2484 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,372 psi | 52% | 2418 fps | 97.6% |
| Winchester 748 | <<locked>> | 80% | 50,169 psi | 80% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,017 psi | 66% | 2661 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,195 psi | 44% | 2428 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,079 psi | 74% | 2703 fps | 99.9% |
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 116 powders for .270 Win. loaded with the .277 | 140gr | Peregrine VLR-4 Compact. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,742 fps to 2,956 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .270 Win. with the .277 | 140gr | Peregrine VLR-4 Compact they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.