Load Specifications
Bullet:.277 | 140gr | Hornady SST
Bullet Manufacturer:Hornady
Bullet Weight:140 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:1:10.0
Load data in caliber .270 Win. with .277 | 140gr | Hornady SST bullet and 100 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-16 and Ramshot Hunter.
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% | 52,924 psi | 85% | 2733 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,636 psi | 88% | 2785 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,181 psi | 76% | 2753 fps | 98.1% |
| Accurate 4064 | <<locked>> | 86% | 53,301 psi | 85% | 2785 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,026 psi | 85% | 2871 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 56,188 psi | 90% | 2861 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,969 psi | 87% | 2815 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,520 psi | 87% | 2904 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,926 psi | 88% | 2805 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,260 psi | 90% | 2772 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,115 psi | 90% | 2982 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,259 psi | 87% | 2835 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,694 psi | 88% | 2858 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,215 psi | 87% | 2930 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,332 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,534 psi | 86% | 2894 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,367 psi | 71% | 2779 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,015 psi | 63% | 2680 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2959 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,130 psi | 90% | 2877 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,926 psi | 88% | 2851 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,563 psi | 87% | 2825 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,260 psi | 90% | 2785 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,549 psi | 87% | 2835 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,521 psi | 89% | 2864 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 55,767 psi | 89% | 2927 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 92% | 55,927 psi | 90% | 2884 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 82% | 53,287 psi | 85% | 2815 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,230 psi | 87% | 2854 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 52,939 psi | 85% | 2848 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,014 psi | 90% | 2963 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,071 psi | 58% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,230 psi | 87% | 2815 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,664 psi | 86% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,316 psi | 85% | 2792 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,115 psi | 90% | 2825 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 55,071 psi | 88% | 2854 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,260 psi | 90% | 2854 fps | 98.6% |
| IMR 4831 | <<locked>> | 96% | 53,751 psi | 86% | 2864 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 56,057 psi | 90% | 2884 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,926 psi | 88% | 2805 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,391 psi | 90% | 2835 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,114 psi | 88% | 2782 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,374 psi | 86% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,028 psi | 90% | 2848 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 53,853 psi | 86% | 2838 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,030 psi | 63% | 2602 fps | 96.1% |
| Norma 201 | <<locked>> | 84% | 54,911 psi | 88% | 2802 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,361 psi | 89% | 2799 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,911 psi | 86% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,753 psi | 89% | 2904 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 49,937 psi | 80% | 2913 fps | 97.8% |
| Norma URP | <<locked>> | 96% | 55,782 psi | 89% | 2913 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,288 psi | 87% | 2864 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,244 psi | 87% | 2907 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 55,085 psi | 88% | 2828 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,056 psi | 88% | 2848 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 59% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,666 psi | 89% | 2848 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,361 psi | 89% | 2923 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,100 psi | 88% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 52,910 psi | 85% | 2894 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,419 psi | 89% | 2976 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 55,898 psi | 90% | 2782 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,492 psi | 89% | 2802 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,810 psi | 88% | 2841 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2874 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2877 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 54,563 psi | 87% | 2825 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,028 psi | 90% | 2848 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,391 psi | 90% | 2835 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,374 psi | 86% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,853 psi | 86% | 2838 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 52,881 psi | 85% | 2851 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,896 psi | 86% | 2808 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,621 psi | 88% | 2831 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,985 psi | 90% | 2736 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,359 psi | 86% | 2694 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,028 psi | 90% | 2802 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 2871 fps | 96.8% |
| Somchem S335 | <<locked>> | 84% | 55,579 psi | 89% | 2736 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,388 psi | 86% | 2795 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,027 psi | 88% | 2841 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,070 psi | 87% | 2913 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,330 psi | 86% | 2854 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 84% | 56,391 psi | 90% | 2720 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,419 psi | 89% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,144 psi | 90% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,405 psi | 90% | 2815 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,273 psi | 87% | 2851 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 55,405 psi | 89% | 2805 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,201 psi | 87% | 2776 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,664 psi | 86% | 2861 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,429 psi | 79% | 2854 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,128 psi | 87% | 2825 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,796 psi | 89% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,767 psi | 89% | 2927 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,001 psi | 64% | 2812 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,621 psi | 88% | 2838 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,169 psi | 80% | 2792 fps | 96.1% |
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% | 46,601 psi | 75% | 2638 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,933 psi | 72% | 2621 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 38,348 psi | 61% | 2585 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 44,106 psi | 71% | 2641 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,779 psi | 53% | 2474 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 49,501 psi | 79% | 2753 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 42,018 psi | 67% | 2605 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 47,805 psi | 77% | 2789 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,576 psi | 83% | 2756 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,895 psi | 85% | 2730 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,469 psi | 73% | 2802 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,148 psi | 68% | 2631 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,092 psi | 72% | 2694 fps | 99.4% |
| Alliant Reloder-16 | 42.5 gr | 80% | 32,764 psi | 53% | 2487 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,535 psi | 59% | 2612 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,079 psi | 75% | 2779 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,732 psi | 46% | 2402 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,651 psi | 59% | 2621 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,982 psi | 53% | 2575 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,965 psi | 79% | 2762 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 42,177 psi | 68% | 2638 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 42,496 psi | 68% | 2608 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,910 psi | 85% | 2736 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,923 psi | 82% | 2782 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,844 psi | 69% | 2644 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 40,001 psi | 64% | 2638 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 86% | 46,224 psi | 74% | 2717 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,995 psi | 80% | 2762 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,211 psi | 48% | 2388 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,224 psi | 74% | 2740 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 42,163 psi | 68% | 2710 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 43% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,979 psi | 77% | 2717 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 50,154 psi | 80% | 2746 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,150 psi | 71% | 2638 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,485 psi | 75% | 2661 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 43,004 psi | 69% | 2641 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,582 psi | 67% | 2592 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,763 psi | 51% | 2431 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 46,224 psi | 74% | 2723 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 51,576 psi | 83% | 2756 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,211 psi | 79% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,878 psi | 78% | 2684 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,266 psi | 71% | 2641 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,608 psi | 59% | 2490 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 39,436 psi | 63% | 2569 fps | 95.3% |
| Lovex S071 | <<locked>> | 98% | 36,651 psi | 59% | 2549 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 48,617 psi | 78% | 2703 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,994 psi | 79% | 2707 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,454 psi | 71% | 2680 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 48,849 psi | 78% | 2789 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 40,712 psi | 65% | 2730 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 32,895 psi | 53% | 2474 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 44,251 psi | 71% | 2697 fps | 99.5% |
| Ramshot Hunter | 47.3 gr | 84% | 36,622 psi | 59% | 2572 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 51,474 psi | 83% | 2772 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,430 psi | 82% | 2792 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 44% | 1604 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,033 psi | 69% | 2628 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,109 psi | 77% | 2805 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,870 psi | 62% | 2674 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,489 psi | 52% | 2487 fps | 95.2% |
| ReloadSwiss RS 70 | 47.6 gr | 82% | 34,432 psi | 55% | 2549 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 52,475 psi | 84% | 2733 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,064 psi | 74% | 2654 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,581 psi | 63% | 2582 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 52,997 psi | 85% | 2825 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 96% | 45,934 psi | 74% | 2762 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 84% | 42,496 psi | 68% | 2608 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,608 psi | 59% | 2490 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,211 psi | 79% | 2730 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,266 psi | 71% | 2641 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 39,436 psi | 63% | 2569 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,582 psi | 65% | 2631 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,227 psi | 81% | 2753 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,892 psi | 77% | 2723 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,400 psi | 79% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,495 psi | 67% | 2513 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,698 psi | 65% | 2536 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,484 psi | 73% | 2756 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 49,327 psi | 79% | 2644 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,806 psi | 80% | 2740 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 40,321 psi | 65% | 2585 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 29,660 psi | 48% | 2431 fps | 97.9% |
| Somchem S385 | <<locked>> | 94% | 43,787 psi | 70% | 2690 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,864 psi | 80% | 2631 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,963 psi | 74% | 2628 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,325 psi | 74% | 2638 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,276 psi | 61% | 2516 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,345 psi | 55% | 2477 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 80% | 51,909 psi | 83% | 2753 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,875 psi | 72% | 2635 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,953 psi | 54% | 2480 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 86% | 31,285 psi | 50% | 2480 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,808 psi | 54% | 2451 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 52,025 psi | 83% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 40,001 psi | 64% | 2638 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,963 psi | 43% | 2418 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,790 psi | 77% | 2730 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,557 psi | 75% | 2730 fps | 95.1% |
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 100 powders for .270 Win. loaded with the .277 | 140gr | Hornady SST. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,982 fps; across all powders the maximum-charge window runs from 1,755 fps to 2,982 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 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 140.0 gr projectile in 0.277" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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-16, Ramshot Hunter rank at the top here: for .270 Win. with the .277 | 140gr | Hornady SST 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.