Load Specifications
Bullet:.277 | 155gr | Barnes LRX BT
Bullet Manufacturer:Barnes
Bullet Weight:155 gr
Bullet Diameter:0.277"
Bullet Length:<<locked>>
Case Length (l3):2.54"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:70 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:72,519 psi
Recommended Twist Rate:1:8.0
Load data in caliber .270 Win. Ackley Improved with .277 | 155gr | Barnes LRX BT bullet and 124 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and ReloadSwiss RS 70.
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>> | 84% | 62,294 psi | 86% | 2677 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 65,079 psi | 90% | 2759 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 62,076 psi | 86% | 2710 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 63,991 psi | 88% | 2782 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 64,629 psi | 89% | 2802 fps | 99.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,516 psi | 68% | 2677 fps | 99.2% |
| Accurate 4064 | <<locked>> | 90% | 62,424 psi | 86% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 63,962 psi | 88% | 2884 fps | 100% |
| ADI APS 450 | <<locked>> | 86% | 64,266 psi | 89% | 2133 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 62,033 psi | 86% | 2805 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 62,961 psi | 87% | 2805 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,159 psi | 79% | 2825 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 51,198 psi | 71% | 2759 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 64,585 psi | 89% | 2795 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 62,584 psi | 86% | 2707 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 63,280 psi | 87% | 2943 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 63,904 psi | 88% | 2825 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 65,224 psi | 90% | 2717 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 64,266 psi | 89% | 2851 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 64,556 psi | 89% | 2933 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 62,439 psi | 86% | 2913 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,202 psi | 78% | 2812 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,661 psi | 68% | 2756 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,615 psi | 64% | 2697 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,727 psi | 56% | 2615 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,417 psi | 74% | 2881 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 62,468 psi | 86% | 2828 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,382 psi | 63% | 2677 fps | 96.3% |
| Bofors RP3 | <<locked>> | 92% | 65,093 psi | 90% | 2844 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,661 psi | 68% | 2756 fps | 97.5% |
| Bofors RP7 | <<locked>> | 96% | 64,324 psi | 89% | 2838 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 61,772 psi | 85% | 2723 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 65,006 psi | 90% | 2831 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 63,715 psi | 88% | 2890 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 65,485 psi | 90% | 2776 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 61,830 psi | 85% | 2822 fps | 100% |
| Hodgdon H414 | <<locked>> | 96% | 62,439 psi | 86% | 2890 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 94% | 62,149 psi | 86% | 2848 fps | 99.3% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 54,824 psi | 76% | 2762 fps | 96.3% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 53,795 psi | 74% | 2749 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 62,758 psi | 87% | 2812 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 60,611 psi | 84% | 2802 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 63,135 psi | 87% | 2848 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 63,541 psi | 88% | 2936 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,216 psi | 50% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 64,020 psi | 88% | 2812 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 63,440 psi | 87% | 2779 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 62,627 psi | 86% | 2789 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 62,004 psi | 86% | 2782 fps | 99.8% |
| IMR 4198 | <<locked>> | 82% | 64,774 psi | 89% | 2671 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 65,296 psi | 90% | 2867 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 62,395 psi | 86% | 2815 fps | 99.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 63,875 psi | 88% | 2867 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 61,844 psi | 85% | 2828 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,608 psi | 78% | 2756 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 86% | 64,585 psi | 89% | 2795 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 65,137 psi | 90% | 2779 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 62,700 psi | 86% | 2776 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 64,556 psi | 89% | 2772 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 62,497 psi | 86% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 61,830 psi | 85% | 2802 fps | 100% |
| Lovex S070 | <<locked>> | 98% | 63,266 psi | 87% | 2844 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,988 psi | 57% | 2530 fps | 97.8% |
| Norma 201 | <<locked>> | 88% | 64,121 psi | 88% | 2789 fps | 100% |
| Norma 202 | <<locked>> | 88% | 65,238 psi | 90% | 2785 fps | 100% |
| Norma 203B | <<locked>> | 90% | 63,425 psi | 87% | 2838 fps | 100% |
| Norma 204 | <<locked>> | 98% | 62,656 psi | 86% | 2877 fps | 99% |
| Norma MRPᴾ | <<locked>> | 100% | 52,489 psi | 72% | 2835 fps | 99.1% |
| Norma URP | <<locked>> | 98% | 62,004 psi | 86% | 2864 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 65,238 psi | 90% | 2874 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 65,093 psi | 90% | 2923 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 42,830 psi | 59% | 2615 fps | 96.4% |
| Ramshot TAC | <<locked>> | 86% | 65,137 psi | 90% | 2838 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 86% | 65,122 psi | 90% | 2844 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 65,224 psi | 90% | 2802 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 51% | 1706 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 63,759 psi | 88% | 2769 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 61,830 psi | 85% | 2805 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 62,062 psi | 86% | 2877 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 62,018 psi | 86% | 2904 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 63,831 psi | 88% | 2910 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 62,569 psi | 86% | 2943 fps | 100% |
| Rottweil R 901 | <<locked>> | 86% | 64,716 psi | 89% | 2759 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 64,817 psi | 89% | 2789 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 64,934 psi | 90% | 2835 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 58,842 psi | 81% | 2795 fps | 97.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,376 psi | 76% | 2799 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 96% | 64,324 psi | 89% | 2838 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 61,830 psi | 85% | 2802 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 86% | 62,700 psi | 86% | 2776 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 62,497 psi | 86% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 63,266 psi | 87% | 2844 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 63,077 psi | 87% | 2854 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 63,831 psi | 88% | 2815 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 64,440 psi | 89% | 2828 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 65,499 psi | 90% | 2717 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 62,323 psi | 86% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 62,076 psi | 86% | 2762 fps | 99.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,882 psi | 76% | 2792 fps | 98.4% |
| Somchem S321 | <<locked>> | 82% | 62,323 psi | 86% | 2782 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 64,585 psi | 89% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 63,628 psi | 88% | 2802 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 64,803 psi | 89% | 2831 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 61,177 psi | 84% | 2792 fps | 97.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 61,308 psi | 85% | 2864 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,985 psi | 77% | 2772 fps | 99% |
| Vihtavuori N130 | <<locked>> | 84% | 64,803 psi | 89% | 2667 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 62,105 psi | 86% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 65,267 psi | 90% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 61,786 psi | 85% | 2717 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 62,540 psi | 86% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 64,875 psi | 89% | 2858 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,196 psi | 66% | 2641 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 86% | 65,485 psi | 90% | 2799 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 63,947 psi | 88% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 63,425 psi | 87% | 2864 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,040 psi | 72% | 2766 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,055 psi | 73% | 2825 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 65,224 psi | 90% | 2831 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 62,091 psi | 86% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 62,439 psi | 86% | 2890 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,814 psi | 58% | 2740 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 88% | 64,846 psi | 89% | 2835 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,475 psi | 72% | 2717 fps | 97.7% |
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% | 55,216 psi | 76% | 2592 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 60,974 psi | 84% | 2713 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,703 psi | 66% | 2530 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 56,072 psi | 77% | 2687 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,398 psi | 64% | 2536 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 32,460 psi | 45% | 2349 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 45,223 psi | 62% | 2533 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,142 psi | 47% | 2402 fps | 97.5% |
| ADI APS 450 | <<locked>> | 80% | 58,421 psi | 81% | 2057 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 51,387 psi | 71% | 2657 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,540 psi | 60% | 2516 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 43,830 psi | 60% | 2602 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 98% | 47,819 psi | 66% | 2700 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,563 psi | 74% | 2654 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 55,172 psi | 76% | 2621 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,805 psi | 66% | 2717 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,801 psi | 60% | 2539 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 80% | 61,424 psi | 85% | 2674 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,876 psi | 65% | 2605 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,794 psi | 47% | 2411 fps | 97.6% |
| Alliant Reloder-17 | 45 gr | 80% | 38,261 psi | 53% | 2536 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,352 psi | 60% | 2595 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 40,480 psi | 56% | 2582 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,092 psi | 36% | 2228 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,605 psi | 46% | 2448 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 84% | 29,733 psi | 41% | 2385 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,937 psi | 70% | 2671 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 42,409 psi | 58% | 2621 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 43,569 psi | 60% | 2546 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 40,480 psi | 56% | 2582 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 38,812 psi | 54% | 2425 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,737 psi | 75% | 2631 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,156 psi | 73% | 2684 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 59,234 psi | 82% | 2838 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 61,250 psi | 84% | 2726 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,251 psi | 61% | 2556 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 36,405 psi | 50% | 2448 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 42,163 psi | 58% | 2526 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 98% | 51,155 psi | 71% | 2707 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 50,212 psi | 69% | 2690 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 51,924 psi | 72% | 2667 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,357 psi | 43% | 2316 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,443 psi | 67% | 2648 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 37,956 psi | 52% | 2513 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 37% | 1483 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,603 psi | 68% | 2618 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,272 psi | 72% | 2641 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,788 psi | 63% | 2549 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,167 psi | 66% | 2575 fps | 98.3% |
| IMR 4198 | <<locked>> | 80% | 61,003 psi | 84% | 2628 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 39,436 psi | 54% | 2461 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,190 psi | 55% | 2454 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 33,054 psi | 46% | 2359 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 48,080 psi | 66% | 2631 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 49,719 psi | 69% | 2648 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 53,563 psi | 74% | 2654 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 61,017 psi | 84% | 2730 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,271 psi | 71% | 2631 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,546 psi | 70% | 2585 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,818 psi | 63% | 2546 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,550 psi | 52% | 2405 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 35,824 psi | 49% | 2382 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 33,504 psi | 46% | 2375 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 49,908 psi | 69% | 2598 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,792 psi | 70% | 2602 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,238 psi | 64% | 2592 fps | 100% |
| Norma 204 | <<locked>> | 88% | 44,541 psi | 61% | 2598 fps | 95.8% |
| Norma MRP | <<locked>> | 90% | 36,999 psi | 51% | 2539 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 34,301 psi | 47% | 2398 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 46,398 psi | 64% | 2615 fps | 100% |
| Ramshot Hunter | <<locked>> | 80% | 33,359 psi | 46% | 2388 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 98% | 39,871 psi | 55% | 2556 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 53,330 psi | 74% | 2680 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,417 psi | 74% | 2694 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 57,276 psi | 79% | 2700 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 38% | 1522 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 59,756 psi | 82% | 2720 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,498 psi | 61% | 2543 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,517 psi | 70% | 2713 fps | 100% |
| ReloadSwiss RS 60 | 45 gr | 80% | 40,741 psi | 56% | 2592 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,866 psi | 47% | 2415 fps | 97.1% |
| ReloadSwiss RS 70 | 45.7 gr | 80% | 33,417 psi | 46% | 2425 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 80% | 53,940 psi | 74% | 2625 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,514 psi | 66% | 2556 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,075 psi | 57% | 2493 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 94% | 48,399 psi | 67% | 2635 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 92% | 42,148 psi | 58% | 2575 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 38,812 psi | 54% | 2425 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,550 psi | 52% | 2405 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,271 psi | 71% | 2631 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,818 psi | 63% | 2546 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,824 psi | 49% | 2382 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,424 psi | 59% | 2549 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,083 psi | 72% | 2661 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,879 psi | 69% | 2631 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,024 psi | 70% | 2539 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,888 psi | 59% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,927 psi | 51% | 2352 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 41,742 psi | 58% | 2569 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 58,088 psi | 80% | 2730 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 50,647 psi | 70% | 2539 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,793 psi | 71% | 2648 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,510 psi | 57% | 2493 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 49,748 psi | 69% | 2625 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 30,676 psi | 42% | 2356 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 37,536 psi | 52% | 2454 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 57,261 psi | 79% | 2582 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 51,590 psi | 71% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,645 psi | 66% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,109 psi | 66% | 2539 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,697 psi | 55% | 2431 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,766 psi | 49% | 2402 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 39,494 psi | 54% | 2487 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 53,650 psi | 74% | 2651 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,325 psi | 64% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,114 psi | 48% | 2402 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 82% | 28,442 psi | 39% | 2300 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 98% | 49,588 psi | 68% | 2766 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,954 psi | 48% | 2375 fps | 99.3% |
| Winchester 748 | <<locked>> | 80% | 54,418 psi | 75% | 2700 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 36,405 psi | 50% | 2448 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 24,439 psi | 34% | 2244 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,647 psi | 68% | 2635 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 42,409 psi | 58% | 2546 fps | 95.3% |
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 124 powders for .270 Win. Ackley Improved loaded with the .277 | 155gr | Barnes LRX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,943 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,943 fps. Accurate 3100 gives the best case fill at 100 %, and 124 of the 124 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (500 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.277" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, 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. Alliant Reloder-17, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .270 Win. Ackley Improved with the .277 | 155gr | Barnes LRX BT 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.