Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:150 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:1:10.5
Load data in caliber .270 Win. Ackley Improved with .277 | 150gr | Peregrine VRG-3 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, 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>> | 84% | 64,977 psi | 90% | 2776 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 65,151 psi | 90% | 2808 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 65,340 psi | 90% | 2871 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 65,340 psi | 90% | 2871 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 64,672 psi | 89% | 2864 fps | 99.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,605 psi | 73% | 2782 fps | 99.6% |
| Accurate 4064 | <<locked>> | 90% | 65,296 psi | 90% | 2864 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 63,164 psi | 87% | 2943 fps | 100% |
| ADI APS 450 | <<locked>> | 86% | 64,397 psi | 89% | 2205 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 64,426 psi | 89% | 2904 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 61,801 psi | 85% | 2861 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 60,220 psi | 83% | 2940 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,780 psi | 74% | 2871 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 63,077 psi | 87% | 2848 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 65,485 psi | 90% | 2805 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 62,337 psi | 86% | 2999 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 62,758 psi | 87% | 2881 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 63,164 psi | 87% | 2907 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 63,817 psi | 88% | 2992 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 61,743 psi | 85% | 2969 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 59,234 psi | 82% | 2923 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,533 psi | 72% | 2867 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,458 psi | 68% | 2799 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,120 psi | 59% | 2726 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,246 psi | 79% | 2995 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 65,224 psi | 90% | 2933 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,211 psi | 66% | 2792 fps | 97.2% |
| Bofors RP3 | <<locked>> | 90% | 64,049 psi | 88% | 2900 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,533 psi | 72% | 2867 fps | 98.1% |
| Bofors RP7 | <<locked>> | 94% | 62,888 psi | 87% | 2890 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 63,933 psi | 88% | 2818 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 63,382 psi | 87% | 2881 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 64,716 psi | 89% | 2923 fps | 100% |
| Hodgdon H414 | <<locked>> | 96% | 65,470 psi | 90% | 2995 fps | 100% |
| Hodgdon H4350 | <<locked>> | 94% | 64,963 psi | 90% | 2956 fps | 99.6% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 57,856 psi | 80% | 2877 fps | 97.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,507 psi | 78% | 2858 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 86% | 65,166 psi | 90% | 2910 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 64,005 psi | 88% | 2907 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 61,975 psi | 85% | 2904 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 62,482 psi | 86% | 2992 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 50% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 62,671 psi | 86% | 2864 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 62,076 psi | 86% | 2831 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 65,180 psi | 90% | 2890 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 64,513 psi | 89% | 2887 fps | 99.9% |
| IMR 4350 | <<locked>> | 98% | 64,049 psi | 88% | 2923 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 64,905 psi | 90% | 2917 fps | 99.9% |
| IMR 4831 | <<locked>> | 98% | 63,280 psi | 87% | 2927 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 64,832 psi | 89% | 2933 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 59,364 psi | 82% | 2864 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,068 psi | 70% | 2838 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 84% | 63,077 psi | 87% | 2848 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 65,340 psi | 90% | 2871 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 62,975 psi | 87% | 2825 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 65,093 psi | 90% | 2877 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 64,759 psi | 89% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 96% | 62,410 psi | 86% | 2904 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,598 psi | 60% | 2635 fps | 98.4% |
| Norma 201 | <<locked>> | 86% | 62,598 psi | 86% | 2841 fps | 100% |
| Norma 202 | <<locked>> | 86% | 63,686 psi | 88% | 2835 fps | 100% |
| Norma 203B | <<locked>> | 88% | 62,381 psi | 86% | 2890 fps | 100% |
| Norma 204 | <<locked>> | 96% | 61,670 psi | 85% | 2933 fps | 99% |
| Norma MRPᴾ | <<locked>> | 100% | 55,956 psi | 77% | 2953 fps | 99.5% |
| Norma URP | <<locked>> | 98% | 65,311 psi | 90% | 2972 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 63,904 psi | 88% | 2923 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,474 psi | 71% | 2854 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 98% | 64,382 psi | 89% | 2986 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,745 psi | 63% | 2730 fps | 97.3% |
| Ramshot TAC | <<locked>> | 84% | 63,527 psi | 88% | 2887 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 84% | 63,759 psi | 88% | 2897 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 63,657 psi | 88% | 2851 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,941 psi | 51% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 64,382 psi | 89% | 2910 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 64,890 psi | 89% | 2979 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 61,264 psi | 84% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 62,975 psi | 87% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 61,786 psi | 85% | 3002 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,032 psi | 58% | 2743 fps | 97.3% |
| Rottweil R 901 | <<locked>> | 84% | 63,353 psi | 87% | 2812 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 63,556 psi | 88% | 2844 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 63,846 psi | 88% | 2894 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 61,931 psi | 85% | 2907 fps | 98.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 58,552 psi | 81% | 2910 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 94% | 62,888 psi | 87% | 2890 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 64,759 psi | 89% | 2907 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 86% | 65,340 psi | 90% | 2871 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 65,093 psi | 90% | 2877 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 62,410 psi | 86% | 2904 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 61,873 psi | 85% | 2907 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 62,395 psi | 86% | 2867 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 62,845 psi | 87% | 2877 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 63,672 psi | 88% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 64,846 psi | 89% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 65,021 psi | 90% | 2867 fps | 99.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 58,044 psi | 80% | 2904 fps | 98.9% |
| Somchem S321 | <<locked>> | 82% | 64,774 psi | 89% | 2877 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 63,048 psi | 87% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 62,221 psi | 86% | 2851 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 63,469 psi | 88% | 2884 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 64,049 psi | 88% | 2900 fps | 97.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 65,079 psi | 90% | 2969 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 58,929 psi | 81% | 2881 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 82% | 63,179 psi | 87% | 2720 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 64,121 psi | 88% | 2743 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 63,904 psi | 88% | 2792 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 64,397 psi | 89% | 2812 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 65,267 psi | 90% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 63,918 psi | 88% | 2917 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,010 psi | 70% | 2749 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 84% | 63,788 psi | 88% | 2848 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 62,569 psi | 86% | 2815 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 62,729 psi | 87% | 2923 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,564 psi | 77% | 2877 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,318 psi | 78% | 2943 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 64,136 psi | 88% | 2884 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 64,788 psi | 89% | 2897 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 61,598 psi | 85% | 2946 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,701 psi | 62% | 2858 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 63,396 psi | 87% | 2887 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,535 psi | 77% | 2825 fps | 98.3% |
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% | 57,479 psi | 79% | 2687 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 50,169 psi | 69% | 2625 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 57,116 psi | 79% | 2772 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 57,116 psi | 79% | 2772 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,511 psi | 60% | 2539 fps | 96.7% |
| Accurate 3100 | <<locked>> | 88% | 34,650 psi | 48% | 2451 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 47,601 psi | 66% | 2631 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,100 psi | 50% | 2497 fps | 98.1% |
| ADI APS 450 | <<locked>> | 80% | 58,291 psi | 80% | 2126 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 53,447 psi | 74% | 2753 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,310 psi | 62% | 2608 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 43,018 psi | 59% | 2648 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 96% | 47,036 psi | 65% | 2749 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 55,622 psi | 77% | 2749 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 57,595 psi | 79% | 2713 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,154 psi | 69% | 2822 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,643 psi | 63% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,936 psi | 67% | 2700 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,549 psi | 49% | 2513 fps | 98.2% |
| Alliant Reloder-17 | 48.3 gr | 80% | 40,161 psi | 55% | 2631 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,627 psi | 59% | 2641 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,161 psi | 55% | 2635 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,744 psi | 36% | 2264 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,257 psi | 46% | 2493 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 84% | 31,502 psi | 43% | 2490 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,345 psi | 74% | 2772 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 42,221 psi | 58% | 2677 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 45,876 psi | 63% | 2644 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,161 psi | 55% | 2635 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 40,379 psi | 56% | 2516 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 56,811 psi | 78% | 2730 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 55,535 psi | 77% | 2779 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 46,383 psi | 64% | 2654 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 38,319 psi | 53% | 2546 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 80% | 41,394 psi | 57% | 2572 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 96% | 50,270 psi | 69% | 2756 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,385 psi | 68% | 2743 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 54,085 psi | 75% | 2762 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,996 psi | 46% | 2408 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,604 psi | 70% | 2746 fps | 100% |
| Hodgdon Superformance | 51.1 gr | 80% | 37,246 psi | 51% | 2552 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,977 psi | 37% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,634 psi | 71% | 2713 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 54,621 psi | 75% | 2736 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,616 psi | 66% | 2641 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,937 psi | 69% | 2671 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 38,682 psi | 53% | 2500 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,901 psi | 58% | 2549 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 34,853 psi | 48% | 2454 fps | 97.8% |
| IMR 4895 | <<locked>> | 80% | 50,212 psi | 69% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,936 psi | 67% | 2697 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 98% | 47,892 psi | 66% | 2779 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 55,622 psi | 77% | 2749 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 53,621 psi | 74% | 2726 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,330 psi | 72% | 2680 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,732 psi | 66% | 2638 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,378 psi | 54% | 2500 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 37,565 psi | 52% | 2480 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 33,402 psi | 46% | 2421 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,127 psi | 72% | 2697 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,721 psi | 73% | 2694 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,254 psi | 67% | 2687 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,584 psi | 60% | 2641 fps | 95.7% |
| Norma MRP | <<locked>> | 88% | 36,666 psi | 51% | 2585 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 36,187 psi | 50% | 2497 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 48,617 psi | 67% | 2710 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,834 psi | 66% | 2792 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 35,056 psi | 48% | 2480 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 96% | 39,508 psi | 54% | 2605 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 55,637 psi | 77% | 2779 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 55,666 psi | 77% | 2789 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 59,756 psi | 82% | 2802 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,441 psi | 38% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,340 psi | 64% | 2638 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,997 psi | 73% | 2818 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,743 psi | 59% | 2687 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,969 psi | 50% | 2516 fps | 97.7% |
| ReloadSwiss RS 70 | 49.1 gr | 80% | 35,085 psi | 48% | 2523 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,986 psi | 54% | 2671 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 56,144 psi | 77% | 2720 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 49,487 psi | 68% | 2648 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,134 psi | 59% | 2592 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,659 psi | 66% | 2684 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 90% | 41,597 psi | 57% | 2621 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 40,379 psi | 56% | 2516 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,378 psi | 54% | 2500 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,621 psi | 74% | 2726 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,732 psi | 66% | 2638 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,565 psi | 52% | 2480 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,454 psi | 61% | 2644 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 54,244 psi | 75% | 2756 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,982 psi | 72% | 2726 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,098 psi | 73% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,788 psi | 62% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,508 psi | 53% | 2444 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,205 psi | 57% | 2618 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 60,713 psi | 84% | 2828 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 52,736 psi | 73% | 2631 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 54,230 psi | 75% | 2746 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,569 psi | 60% | 2589 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,892 psi | 67% | 2674 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 32,489 psi | 45% | 2448 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 39,479 psi | 54% | 2549 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 59,451 psi | 82% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 53,708 psi | 74% | 2618 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,951 psi | 69% | 2618 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,183 psi | 69% | 2631 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,626 psi | 57% | 2523 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,608 psi | 52% | 2497 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 38,972 psi | 54% | 2530 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 56,028 psi | 77% | 2749 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 48,399 psi | 67% | 2625 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,999 psi | 51% | 2497 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 28,210 psi | 39% | 2336 fps | 95.7% |
| Vihtavuori N560 | <<locked>> | 96% | 49,008 psi | 68% | 2818 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,796 psi | 51% | 2470 fps | 99.6% |
| Winchester 748 | <<locked>> | 80% | 56,695 psi | 78% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 38,319 psi | 53% | 2546 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,831 psi | 36% | 2349 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,967 psi | 72% | 2733 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,843 psi | 58% | 2592 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 121 powders for .270 Win. Ackley Improved loaded with the .277 | 150gr | Peregrine VRG-3. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,002 fps; across all powders the maximum-charge window runs from 1,726 fps to 3,002 fps. Accurate 3100 gives the best case fill at 100 %, and 121 of the 121 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 150.0 gr projectile in 0.277" calls for a 1:10.5 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .270 Win. Ackley Improved with the .277 | 150gr | Peregrine VRG-3 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.