Load Specifications
Bullet:.277 | 156gr | Brenneke TAG
Bullet Manufacturer:Brenneke
Bullet Weight:156 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:1:11.0
Load data in caliber .270 Win. Ackley Improved with .277 | 156gr | Brenneke TAG bullet and 121 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Winchester 760 and Hodgdon Superformance.
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% | 62,468 psi | 86% | 2690 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 62,787 psi | 87% | 2726 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 64,397 psi | 89% | 2799 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 64,759 psi | 89% | 2825 fps | 99.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,491 psi | 75% | 2759 fps | 99.9% |
| Accurate 4064 | <<locked>> | 88% | 63,077 psi | 87% | 2782 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 65,180 psi | 90% | 2910 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,913 psi | 78% | 2904 fps | 97.1% |
| ADI APS 450 | <<locked>> | 86% | 64,600 psi | 89% | 2169 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 62,105 psi | 86% | 2818 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 63,266 psi | 87% | 2825 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 62,004 psi | 86% | 2913 fps | 99.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,405 psi | 76% | 2851 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 64,513 psi | 89% | 2812 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 63,005 psi | 87% | 2720 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 64,237 psi | 89% | 2966 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 64,382 psi | 89% | 2844 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 64,774 psi | 89% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 61,728 psi | 85% | 2913 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 63,788 psi | 88% | 2936 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 61,003 psi | 84% | 2897 fps | 99.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,360 psi | 75% | 2844 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,561 psi | 71% | 2779 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,599 psi | 62% | 2710 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 59,640 psi | 82% | 2972 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 62,685 psi | 86% | 2848 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,893 psi | 69% | 2772 fps | 97.9% |
| Bofors RP3 | <<locked>> | 88% | 61,844 psi | 85% | 2818 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,360 psi | 75% | 2844 fps | 98.8% |
| Bofors RP7 | <<locked>> | 94% | 64,788 psi | 89% | 2864 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 61,540 psi | 85% | 2736 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 65,354 psi | 90% | 2848 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 62,105 psi | 86% | 2841 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 63,382 psi | 87% | 2917 fps | 100% |
| Hodgdon H4350 | <<locked>> | 92% | 62,801 psi | 87% | 2877 fps | 99.6% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 59,654 psi | 82% | 2854 fps | 97.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 58,262 psi | 80% | 2835 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 84% | 62,874 psi | 87% | 2828 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 61,873 psi | 85% | 2828 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 64,005 psi | 88% | 2871 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,584 psi | 60% | 2743 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 94% | 64,600 psi | 89% | 2966 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,448 psi | 50% | 1693 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 64,121 psi | 88% | 2828 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 64,020 psi | 88% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 62,816 psi | 87% | 2805 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 61,830 psi | 85% | 2802 fps | 99.9% |
| IMR 4350 | <<locked>> | 96% | 61,931 psi | 85% | 2844 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 62,627 psi | 86% | 2838 fps | 99.9% |
| IMR 4831 | <<locked>> | 98% | 65,180 psi | 90% | 2897 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 62,598 psi | 86% | 2851 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 60,988 psi | 84% | 2838 fps | 98.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,026 psi | 73% | 2825 fps | 97.4% |
| IMR 8208 XBR | <<locked>> | 84% | 64,513 psi | 89% | 2812 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 63,092 psi | 87% | 2792 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 64,310 psi | 89% | 2789 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 62,816 psi | 87% | 2795 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 62,526 psi | 86% | 2828 fps | 100% |
| Lovex S070 | <<locked>> | 96% | 64,107 psi | 88% | 2871 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,165 psi | 62% | 2615 fps | 99% |
| Norma 201 | <<locked>> | 86% | 64,397 psi | 89% | 2805 fps | 100% |
| Norma 202 | <<locked>> | 86% | 65,586 psi | 90% | 2802 fps | 100% |
| Norma 203B | <<locked>> | 88% | 63,962 psi | 88% | 2858 fps | 100% |
| Norma 204 | <<locked>> | 96% | 63,483 psi | 88% | 2907 fps | 99.4% |
| Norma MRPᴾ | <<locked>> | 100% | 58,059 psi | 80% | 2930 fps | 99.8% |
| Norma URP | <<locked>> | 96% | 63,193 psi | 87% | 2890 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 61,482 psi | 85% | 2841 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,272 psi | 73% | 2841 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 96% | 62,018 psi | 86% | 2900 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,398 psi | 65% | 2717 fps | 98.2% |
| Ramshot TAC | <<locked>> | 84% | 65,021 psi | 90% | 2854 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 84% | 65,311 psi | 90% | 2861 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 65,093 psi | 90% | 2818 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 51% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 61,830 psi | 85% | 2825 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 62,656 psi | 86% | 2897 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 63,280 psi | 87% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 65,398 psi | 90% | 2940 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 63,802 psi | 88% | 2972 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,497 psi | 60% | 2736 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 84% | 64,745 psi | 89% | 2772 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 65,050 psi | 90% | 2805 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 61,656 psi | 85% | 2812 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 63,657 psi | 88% | 2881 fps | 98.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 60,466 psi | 83% | 2887 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 94% | 64,788 psi | 89% | 2864 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 62,526 psi | 86% | 2828 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 84% | 63,092 psi | 87% | 2792 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 62,816 psi | 87% | 2795 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 64,107 psi | 88% | 2871 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 63,933 psi | 88% | 2877 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 63,976 psi | 88% | 2835 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 64,716 psi | 89% | 2848 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 65,369 psi | 90% | 2730 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 62,700 psi | 86% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 62,656 psi | 86% | 2789 fps | 99.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 59,944 psi | 83% | 2881 fps | 99.3% |
| Somchem S335 | <<locked>> | 86% | 64,730 psi | 89% | 2726 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 63,788 psi | 88% | 2818 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 65,441 psi | 90% | 2854 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 61,670 psi | 85% | 2822 fps | 98% |
| Somchem S365 | <<locked>> | 98% | 63,106 psi | 87% | 2890 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 60,742 psi | 84% | 2854 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 82% | 64,411 psi | 89% | 2677 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 61,989 psi | 85% | 2664 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 61,917 psi | 85% | 2713 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 62,105 psi | 86% | 2730 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 62,975 psi | 87% | 2776 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 61,772 psi | 85% | 2838 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,678 psi | 73% | 2726 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 84% | 65,267 psi | 90% | 2812 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 64,034 psi | 88% | 2779 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 64,556 psi | 89% | 2890 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,493 psi | 79% | 2851 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 58,276 psi | 80% | 2920 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 61,743 psi | 85% | 2805 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 62,526 psi | 86% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 63,382 psi | 87% | 2917 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,630 psi | 64% | 2838 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 65,369 psi | 90% | 2854 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,305 psi | 79% | 2802 fps | 98.9% |
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% | 58,755 psi | 81% | 2648 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 51,547 psi | 71% | 2589 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 60,205 psi | 83% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,690 psi | 69% | 2608 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 31,241 psi | 43% | 2326 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 48,936 psi | 67% | 2598 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,347 psi | 52% | 2477 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 96% | 49,414 psi | 68% | 2782 fps | 95.4% |
| ADI APS 450 | <<locked>> | 80% | 58,494 psi | 81% | 2090 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 54,766 psi | 76% | 2723 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,659 psi | 64% | 2585 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 41,553 psi | 57% | 2575 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 94% | 45,469 psi | 63% | 2677 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 56,898 psi | 78% | 2717 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 59,103 psi | 82% | 2677 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,706 psi | 71% | 2792 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,123 psi | 65% | 2605 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,212 psi | 69% | 2671 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,608 psi | 50% | 2490 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,713 psi | 58% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,263 psi | 57% | 2569 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,740 psi | 53% | 2559 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,571 psi | 37% | 2251 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,300 psi | 45% | 2428 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 82% | 30,443 psi | 42% | 2418 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,723 psi | 75% | 2740 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 40,944 psi | 56% | 2605 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 47,181 psi | 65% | 2615 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 38,740 psi | 53% | 2559 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 41,640 psi | 57% | 2500 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 80% | 58,015 psi | 80% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 56,971 psi | 79% | 2746 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 47,630 psi | 66% | 2628 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 39,537 psi | 55% | 2526 fps | 97% |
| Hodgdon H4350 | <<locked>> | 80% | 42,525 psi | 59% | 2549 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 48,573 psi | 67% | 2684 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 47,718 psi | 66% | 2667 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 55,376 psi | 76% | 2730 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,084 psi | 47% | 2388 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,359 psi | 72% | 2720 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 38,232 psi | 53% | 2615 fps | 95.1% |
| Hodgdon Superformance | 51 gr | 80% | 38,421 psi | 53% | 2536 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 37% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,142 psi | 73% | 2684 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 56,405 psi | 78% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,081 psi | 68% | 2615 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,343 psi | 71% | 2648 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 37,347 psi | 52% | 2428 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,163 psi | 60% | 2530 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 35,984 psi | 50% | 2434 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 51,503 psi | 71% | 2697 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,297 psi | 65% | 2625 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 46,340 psi | 64% | 2710 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 56,898 psi | 78% | 2717 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 55,085 psi | 76% | 2694 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,766 psi | 74% | 2651 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,211 psi | 68% | 2612 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,408 psi | 56% | 2477 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 38,624 psi | 53% | 2457 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 32,605 psi | 45% | 2359 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 53,359 psi | 74% | 2664 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,302 psi | 75% | 2661 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,545 psi | 68% | 2657 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,148 psi | 58% | 2566 fps | 95.8% |
| Norma MRP | <<locked>> | 86% | 35,360 psi | 49% | 2510 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 37,318 psi | 51% | 2474 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 50,009 psi | 69% | 2680 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 42,786 psi | 59% | 2648 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 36,187 psi | 50% | 2464 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 94% | 38,072 psi | 53% | 2536 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 56,942 psi | 79% | 2749 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 57,363 psi | 79% | 2759 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 61,076 psi | 84% | 2769 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,630 psi | 38% | 1549 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,805 psi | 66% | 2615 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 54,534 psi | 75% | 2789 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,367 psi | 61% | 2664 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,231 psi | 51% | 2497 fps | 98.4% |
| ReloadSwiss RS 70 | 49 gr | 80% | 36,158 psi | 50% | 2507 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,666 psi | 52% | 2602 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 80% | 57,406 psi | 79% | 2684 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 50,966 psi | 70% | 2621 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,411 psi | 61% | 2562 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,035 psi | 63% | 2608 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 40,263 psi | 56% | 2549 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 41,640 psi | 57% | 2500 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,408 psi | 56% | 2477 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 55,085 psi | 76% | 2694 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 49,211 psi | 68% | 2612 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,624 psi | 53% | 2457 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,759 psi | 63% | 2618 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 55,956 psi | 77% | 2730 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,243 psi | 73% | 2694 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,230 psi | 75% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,847 psi | 63% | 2470 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,508 psi | 54% | 2421 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,900 psi | 55% | 2543 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 53,896 psi | 74% | 2595 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 55,622 psi | 77% | 2713 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,759 psi | 62% | 2562 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 47,094 psi | 65% | 2602 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 33,866 psi | 47% | 2434 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 35,694 psi | 49% | 2425 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 60,655 psi | 84% | 2635 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 54,853 psi | 76% | 2579 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,198 psi | 71% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,416 psi | 71% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,757 psi | 59% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,769 psi | 53% | 2474 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 37,768 psi | 52% | 2464 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 57,363 psi | 79% | 2713 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 49,617 psi | 68% | 2592 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,116 psi | 53% | 2477 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 29,298 psi | 40% | 2323 fps | 96.8% |
| Vihtavuori N560 | <<locked>> | 94% | 47,326 psi | 65% | 2743 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,855 psi | 52% | 2448 fps | 99.9% |
| Winchester 748 | <<locked>> | 80% | 58,494 psi | 81% | 2766 fps | 100% |
| Winchester 760 | 47.3 gr | 80% | 39,740 psi | 55% | 2533 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,308 psi | 32% | 2215 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,345 psi | 74% | 2700 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,234 psi | 55% | 2520 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 128 powders for .270 Win. Ackley Improved loaded with the .277 | 156gr | Brenneke TAG. Alliant Reloder-26 delivers the highest muzzle velocity at 2,972 fps; across all powders the maximum-charge window runs from 1,693 fps to 2,972 fps. Accurate 3100 gives the best case fill at 100 %, and 128 of the 128 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (500 MPa), the top charges use 42–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.277" calls for a 1:11.0 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, Winchester 760, Hodgdon Superformance rank at the top here: for .270 Win. Ackley Improved with the .277 | 156gr | Brenneke TAG they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.