Load Specifications
Bullet:.277 | 140gr | Frontier BTSP
Bullet Manufacturer:Frontier Bullets
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:1:8.5
Load data in caliber .270 Win. with .277 | 140gr | Frontier BTSP 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.
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 2015 | <<locked>> | 82% | 54,955 psi | 88% | 2710 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,186 psi | 87% | 2740 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,506 psi | 89% | 2802 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,217 psi | 90% | 2792 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,686 psi | 72% | 2700 fps | 97.3% |
| Accurate 4064 | <<locked>> | 88% | 54,230 psi | 87% | 2785 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,143 psi | 87% | 2877 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 54,085 psi | 87% | 2815 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,230 psi | 89% | 2818 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,199 psi | 84% | 2848 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,376 psi | 90% | 2815 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,317 psi | 87% | 2740 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,809 psi | 86% | 2936 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,463 psi | 89% | 2841 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,869 psi | 90% | 2861 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,085 psi | 88% | 2930 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 52,866 psi | 85% | 2913 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,227 psi | 82% | 2838 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,395 psi | 68% | 2730 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,877 psi | 77% | 2904 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,969 psi | 87% | 2831 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 56,231 psi | 90% | 2858 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,130 psi | 90% | 2835 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,520 psi | 87% | 2746 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,115 psi | 90% | 2844 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,272 psi | 85% | 2815 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 53,403 psi | 86% | 2874 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 92% | 53,925 psi | 86% | 2838 fps | 97% |
| Hodgdon H4895 | <<locked>> | 84% | 54,636 psi | 88% | 2825 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,100 psi | 88% | 2854 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,418 psi | 87% | 2861 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,432 psi | 86% | 2904 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 58% | 1736 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,738 psi | 89% | 2825 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,158 psi | 88% | 2808 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,795 psi | 88% | 2802 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,331 psi | 87% | 2779 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 53,214 psi | 85% | 2808 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,549 psi | 87% | 2812 fps | 98.2% |
| IMR 4831 | <<locked>> | 98% | 54,534 psi | 87% | 2867 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 53,983 psi | 87% | 2841 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,376 psi | 90% | 2815 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,186 psi | 87% | 2792 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,403 psi | 86% | 2743 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,766 psi | 88% | 2799 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,998 psi | 87% | 2805 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 55,085 psi | 88% | 2841 fps | 98.5% |
| Norma 201 | <<locked>> | 86% | 56,347 psi | 90% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,490 psi | 86% | 2762 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,085 psi | 88% | 2848 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,635 psi | 86% | 2854 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 47,456 psi | 76% | 2854 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 53,243 psi | 85% | 2864 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 55,709 psi | 89% | 2874 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,680 psi | 89% | 2917 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 53,316 psi | 85% | 2785 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,866 psi | 85% | 2802 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,332 psi | 58% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,635 psi | 86% | 2802 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,084 psi | 85% | 2877 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,289 psi | 90% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,780 psi | 86% | 2897 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,098 psi | 85% | 2923 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 53,867 psi | 86% | 2740 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,693 psi | 86% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,101 psi | 90% | 2848 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,053 psi | 80% | 2822 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 94% | 56,130 psi | 90% | 2835 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,998 psi | 87% | 2805 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,186 psi | 87% | 2792 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,766 psi | 88% | 2799 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,085 psi | 88% | 2841 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,143 psi | 87% | 2858 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,564 psi | 89% | 2822 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,246 psi | 90% | 2841 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,085 psi | 87% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,592 psi | 88% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,128 psi | 87% | 2759 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,559 psi | 79% | 2815 fps | 96% |
| Somchem S335 | <<locked>> | 84% | 53,838 psi | 86% | 2700 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,013 psi | 88% | 2808 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,362 psi | 90% | 2848 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,868 psi | 88% | 2913 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,937 psi | 82% | 2805 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 84% | 54,462 psi | 87% | 2684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,388 psi | 86% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,070 psi | 87% | 2743 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,186 psi | 87% | 2776 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,492 psi | 89% | 2858 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 53,621 psi | 86% | 2766 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,535 psi | 89% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,578 psi | 88% | 2864 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,978 psi | 75% | 2805 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,782 psi | 89% | 2838 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,650 psi | 86% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,403 psi | 86% | 2874 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,942 psi | 61% | 2746 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,970 psi | 90% | 2844 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% | 51,692 psi | 83% | 2664 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,541 psi | 71% | 2598 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,895 psi | 83% | 2753 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,482 psi | 70% | 2579 fps | 95% |
| Accurate 3100 | <<locked>> | 96% | 38,928 psi | 62% | 2589 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 42,119 psi | 68% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,518 psi | 54% | 2487 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 47,674 psi | 76% | 2710 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,596 psi | 65% | 2562 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 49,081 psi | 79% | 2795 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,734 psi | 80% | 2713 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,908 psi | 82% | 2694 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,845 psi | 70% | 2756 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,669 psi | 65% | 2589 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,352 psi | 70% | 2648 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,575 psi | 51% | 2441 fps | 95% |
| Alliant Reloder-17 | 44 gr | 80% | 35,128 psi | 56% | 2566 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,211 psi | 77% | 2785 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,138 psi | 47% | 2405 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,489 psi | 54% | 2579 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,079 psi | 75% | 2720 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 40,379 psi | 65% | 2595 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 43,816 psi | 70% | 2621 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,401 psi | 82% | 2700 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,168 psi | 79% | 2743 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,191 psi | 66% | 2602 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 40,988 psi | 66% | 2648 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 47,224 psi | 76% | 2723 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 48,138 psi | 77% | 2720 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,979 psi | 46% | 2346 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,454 psi | 71% | 2697 fps | 99.9% |
| Hodgdon Superformance | 51.2 gr | 88% | 43,366 psi | 70% | 2723 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 43% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,238 psi | 74% | 2674 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 48,254 psi | 77% | 2710 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,656 psi | 68% | 2595 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,208 psi | 72% | 2621 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 43,932 psi | 70% | 2644 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,583 psi | 68% | 2598 fps | 95.6% |
| IMR 4831 | <<locked>> | 82% | 32,445 psi | 52% | 2441 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 44,411 psi | 71% | 2680 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 49,734 psi | 80% | 2713 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,297 psi | 76% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,442 psi | 76% | 2644 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 42,743 psi | 69% | 2602 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,521 psi | 60% | 2497 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 40,306 psi | 65% | 2575 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 46,717 psi | 75% | 2661 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,340 psi | 76% | 2667 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,699 psi | 68% | 2638 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 50,067 psi | 80% | 2795 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 41,365 psi | 66% | 2730 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 33,634 psi | 54% | 2484 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 42,627 psi | 68% | 2657 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 37,536 psi | 60% | 2582 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 49,734 psi | 80% | 2730 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,516 psi | 79% | 2746 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,093 psi | 43% | 1585 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,263 psi | 66% | 2579 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,166 psi | 74% | 2759 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,362 psi | 60% | 2628 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,286 psi | 53% | 2503 fps | 95.3% |
| ReloadSwiss RS 70 | 46.9 gr | 84% | 35,302 psi | 57% | 2559 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 50,734 psi | 81% | 2694 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,483 psi | 71% | 2615 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,043 psi | 61% | 2539 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 46,934 psi | 75% | 2769 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 43,816 psi | 70% | 2621 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,521 psi | 60% | 2497 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,297 psi | 76% | 2690 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,743 psi | 69% | 2602 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,306 psi | 65% | 2575 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,914 psi | 62% | 2585 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,327 psi | 77% | 2707 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,238 psi | 74% | 2680 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,080 psi | 77% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,248 psi | 65% | 2480 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,771 psi | 67% | 2546 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,499 psi | 75% | 2762 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 47,543 psi | 76% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,950 psi | 77% | 2697 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 38,624 psi | 62% | 2543 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 28,268 psi | 45% | 2382 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 44,701 psi | 72% | 2697 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 48,486 psi | 78% | 2598 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,411 psi | 71% | 2592 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,788 psi | 72% | 2602 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,869 psi | 59% | 2480 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 32,779 psi | 53% | 2431 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 50,096 psi | 80% | 2713 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,250 psi | 69% | 2595 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,592 psi | 55% | 2487 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 31,546 psi | 51% | 2480 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,474 psi | 52% | 2408 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 50,111 psi | 80% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,988 psi | 66% | 2648 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,470 psi | 44% | 2421 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,876 psi | 74% | 2687 fps | 99.8% |
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 | 140gr | Frontier BTSP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,736 fps to 2,963 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 140.0 gr projectile in 0.277" calls for a 1:8.5 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .270 Win. with the .277 | 140gr | Frontier BTSP 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.