Load Specifications
Bullet Manufacturer:Rhino Bullets
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:1:9.0
Load data in caliber .270 Win. Ackley Improved with .277 | 150gr | Rhino Penetrator bullet and 123 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 Hodgdon H414.
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% | 63,802 psi | 88% | 2740 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 64,223 psi | 89% | 2779 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 61,569 psi | 85% | 2802 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 62,018 psi | 86% | 2818 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,401 psi | 71% | 2746 fps | 99.3% |
| Accurate 4064 | <<locked>> | 90% | 64,382 psi | 89% | 2835 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 61,670 psi | 85% | 2904 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 56,144 psi | 77% | 2940 fps | 97.6% |
| ADI APS 450 | <<locked>> | 86% | 64,643 psi | 89% | 2185 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 63,454 psi | 88% | 2874 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 64,440 psi | 89% | 2874 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 58,552 psi | 81% | 2894 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,504 psi | 72% | 2825 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 61,641 psi | 85% | 2812 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 63,976 psi | 88% | 2772 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 64,687 psi | 89% | 3009 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 58,494 psi | 81% | 2890 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 65,209 psi | 90% | 2890 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 62,018 psi | 86% | 2871 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 61,989 psi | 85% | 2953 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 64,092 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,624 psi | 79% | 2881 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,097 psi | 70% | 2825 fps | 97.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,240 psi | 67% | 2766 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,148 psi | 58% | 2687 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,158 psi | 76% | 2953 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 63,846 psi | 88% | 2897 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,891 psi | 65% | 2749 fps | 96.5% |
| Bofors RP3 | <<locked>> | 90% | 62,700 psi | 86% | 2864 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,097 psi | 70% | 2825 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 61,699 psi | 85% | 2851 fps | 99.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 62,845 psi | 87% | 2785 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 62,294 psi | 86% | 2848 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 64,992 psi | 90% | 2959 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 63,092 psi | 87% | 2884 fps | 100% |
| Hodgdon H414 | <<locked>> | 96% | 64,034 psi | 88% | 2959 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 94% | 63,382 psi | 87% | 2913 fps | 99.3% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,144 psi | 77% | 2828 fps | 96.4% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,143 psi | 76% | 2815 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 86% | 64,194 psi | 89% | 2881 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 62,352 psi | 86% | 2871 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 64,672 psi | 89% | 2917 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 65,108 psi | 90% | 3005 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,303 psi | 50% | 1706 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 65,224 psi | 90% | 2877 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 65,151 psi | 90% | 2848 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 63,904 psi | 88% | 2854 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 63,092 psi | 87% | 2848 fps | 99.8% |
| IMR 4350 | <<locked>> | 98% | 62,656 psi | 86% | 2884 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 63,280 psi | 87% | 2874 fps | 99.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 65,601 psi | 90% | 2936 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 63,585 psi | 88% | 2897 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,943 psi | 80% | 2822 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 84% | 61,641 psi | 85% | 2812 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 64,266 psi | 89% | 2841 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 65,456 psi | 90% | 2835 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 63,962 psi | 88% | 2844 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 63,324 psi | 87% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 98% | 65,035 psi | 90% | 2913 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,699 psi | 59% | 2598 fps | 98% |
| Norma 201 | <<locked>> | 86% | 61,743 psi | 85% | 2808 fps | 100% |
| Norma 202 | <<locked>> | 86% | 62,714 psi | 86% | 2805 fps | 100% |
| Norma 203B | <<locked>> | 90% | 65,108 psi | 90% | 2907 fps | 100% |
| Norma 204 | <<locked>> | 98% | 64,063 psi | 88% | 2943 fps | 99% |
| Norma MRPᴾ | <<locked>> | 100% | 54,230 psi | 75% | 2907 fps | 99.2% |
| Norma URP | <<locked>> | 98% | 63,744 psi | 88% | 2936 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 62,192 psi | 86% | 2887 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,995 psi | 69% | 2808 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 98% | 62,366 psi | 86% | 2940 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,396 psi | 61% | 2684 fps | 96.6% |
| Ramshot TAC | <<locked>> | 84% | 62,265 psi | 86% | 2851 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 84% | 62,294 psi | 86% | 2858 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 62,540 psi | 86% | 2818 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,072 psi | 51% | 1749 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 64,846 psi | 89% | 2831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 63,251 psi | 87% | 2874 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 63,440 psi | 87% | 2943 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 63,382 psi | 87% | 2972 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 61,264 psi | 84% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 64,208 psi | 89% | 3015 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,988 psi | 57% | 2697 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 84% | 62,381 psi | 86% | 2779 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 62,366 psi | 86% | 2808 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 62,555 psi | 86% | 2858 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 60,292 psi | 83% | 2861 fps | 97.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,884 psi | 78% | 2867 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 94% | 61,699 psi | 85% | 2851 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 96% | 63,324 psi | 87% | 2867 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 86% | 64,266 psi | 89% | 2841 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 63,962 psi | 88% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 65,035 psi | 90% | 2913 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 64,426 psi | 89% | 2920 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 65,441 psi | 90% | 2884 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 65,557 psi | 90% | 2890 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 62,874 psi | 87% | 2736 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 63,585 psi | 88% | 2733 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 63,773 psi | 88% | 2831 fps | 99.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,420 psi | 78% | 2864 fps | 98.4% |
| Somchem S321 | <<locked>> | 82% | 63,643 psi | 88% | 2848 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 62,178 psi | 86% | 2733 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 65,035 psi | 90% | 2867 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 62,468 psi | 86% | 2851 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 62,656 psi | 86% | 2861 fps | 97.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 63,092 psi | 87% | 2933 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,537 psi | 79% | 2841 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 82% | 62,120 psi | 86% | 2687 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 63,251 psi | 87% | 2713 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 62,772 psi | 87% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 63,150 psi | 87% | 2779 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 64,020 psi | 88% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 62,352 psi | 86% | 2877 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,661 psi | 68% | 2710 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 84% | 62,743 psi | 87% | 2815 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 65,093 psi | 90% | 2825 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 65,398 psi | 90% | 2936 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,954 psi | 74% | 2838 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,708 psi | 75% | 2897 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 62,294 psi | 86% | 2848 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 63,454 psi | 88% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 64,034 psi | 88% | 2959 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,468 psi | 60% | 2815 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 61,960 psi | 85% | 2851 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,824 psi | 74% | 2779 fps | 97.8% |
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% | 56,550 psi | 78% | 2654 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 49,821 psi | 69% | 2598 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 57,450 psi | 79% | 2753 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,819 psi | 66% | 2602 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 34,258 psi | 47% | 2425 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,166 psi | 65% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,520 psi | 49% | 2467 fps | 97.7% |
| Accurate High Country | <<locked>> | 94% | 45,397 psi | 63% | 2756 fps | 95% |
| ADI APS 450 | <<locked>> | 80% | 58,247 psi | 80% | 2103 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 52,417 psi | 72% | 2717 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,512 psi | 61% | 2575 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 42,293 psi | 58% | 2612 fps | 95% |
| ADI AR 2213 | <<locked>> | 98% | 49,182 psi | 68% | 2769 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,476 psi | 75% | 2717 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 56,376 psi | 78% | 2684 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,849 psi | 67% | 2782 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,438 psi | 59% | 2615 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,947 psi | 62% | 2602 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,935 psi | 66% | 2667 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,027 psi | 48% | 2480 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,436 psi | 54% | 2602 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,945 psi | 58% | 2608 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,785 psi | 58% | 2651 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,599 psi | 35% | 2241 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,808 psi | 45% | 2461 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 84% | 31,024 psi | 43% | 2457 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,199 psi | 72% | 2736 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 43,947 psi | 61% | 2694 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 45,121 psi | 62% | 2612 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 41,785 psi | 58% | 2651 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 39,914 psi | 55% | 2487 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 55,970 psi | 77% | 2697 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,404 psi | 75% | 2746 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 60,655 psi | 84% | 2904 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,629 psi | 63% | 2621 fps | 99.3% |
| Hodgdon H414 | 45.3 gr | 80% | 37,637 psi | 52% | 2513 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 80% | 40,596 psi | 56% | 2533 fps | 95% |
| Hodgdon H4831 | <<locked>> | 98% | 52,562 psi | 72% | 2776 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,605 psi | 71% | 2756 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 52,982 psi | 73% | 2726 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,503 psi | 45% | 2379 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,603 psi | 68% | 2713 fps | 100% |
| Hodgdon Superformance | 50.2 gr | 82% | 39,349 psi | 54% | 2582 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 37% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,763 psi | 70% | 2680 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,824 psi | 74% | 2710 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,818 psi | 65% | 2608 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,269 psi | 68% | 2638 fps | 98.3% |
| IMR 4350 | <<locked>> | 82% | 38,043 psi | 52% | 2467 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,321 psi | 57% | 2516 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 34,447 psi | 48% | 2428 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 49,182 psi | 68% | 2694 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,155 psi | 71% | 2713 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 54,476 psi | 75% | 2717 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,736 psi | 73% | 2697 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,503 psi | 71% | 2648 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,021 psi | 65% | 2608 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,943 psi | 54% | 2470 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 37,217 psi | 51% | 2451 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 33,025 psi | 46% | 2395 fps | 95% |
| Norma 201 | <<locked>> | 80% | 51,459 psi | 71% | 2667 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,938 psi | 72% | 2664 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,326 psi | 65% | 2654 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,815 psi | 59% | 2605 fps | 95.1% |
| Norma MRP | <<locked>> | 90% | 38,392 psi | 53% | 2608 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 35,650 psi | 49% | 2467 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 47,500 psi | 66% | 2674 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 46,717 psi | 64% | 2746 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 34,519 psi | 48% | 2451 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 41,466 psi | 57% | 2628 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 54,607 psi | 75% | 2743 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,781 psi | 76% | 2759 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 58,552 psi | 81% | 2766 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 38% | 1562 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 60,916 psi | 84% | 2785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,658 psi | 63% | 2605 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,866 psi | 72% | 2782 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,901 psi | 58% | 2654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,389 psi | 49% | 2487 fps | 97.3% |
| ReloadSwiss RS 70 | 47 gr | 80% | 34,490 psi | 48% | 2487 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,232 psi | 53% | 2628 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 55,405 psi | 76% | 2687 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 49,095 psi | 68% | 2625 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,627 psi | 59% | 2562 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 46,615 psi | 64% | 2644 fps | 95% |
| Rottweil R 905 | <<locked>> | 92% | 43,627 psi | 60% | 2644 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 39,914 psi | 55% | 2487 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,943 psi | 54% | 2470 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,736 psi | 73% | 2697 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,021 psi | 65% | 2608 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,217 psi | 51% | 2451 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,627 psi | 60% | 2612 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,534 psi | 74% | 2726 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,024 psi | 70% | 2694 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,156 psi | 72% | 2602 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,976 psi | 61% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,971 psi | 52% | 2411 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,221 psi | 60% | 2638 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 59,538 psi | 82% | 2795 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 52,040 psi | 72% | 2602 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,142 psi | 73% | 2710 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,004 psi | 59% | 2562 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 51,372 psi | 71% | 2697 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 32,039 psi | 44% | 2425 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 38,885 psi | 54% | 2520 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 58,378 psi | 81% | 2641 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 52,649 psi | 73% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,979 psi | 68% | 2585 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,443 psi | 68% | 2602 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,089 psi | 57% | 2497 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,854 psi | 51% | 2464 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 40,828 psi | 56% | 2552 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 54,940 psi | 76% | 2713 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 47,601 psi | 66% | 2595 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,419 psi | 50% | 2467 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 27,949 psi | 39% | 2316 fps | 95.4% |
| Vihtavuori N560 | <<locked>> | 98% | 50,937 psi | 70% | 2835 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,172 psi | 50% | 2438 fps | 99.4% |
| Winchester 748 | <<locked>> | 80% | 55,579 psi | 77% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 37,637 psi | 52% | 2513 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,701 psi | 35% | 2323 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,792 psi | 70% | 2697 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,961 psi | 61% | 2615 fps | 95.6% |
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 123 powders for .270 Win. Ackley Improved loaded with the .277 | 150gr | Rhino Penetrator. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,706 fps to 3,015 fps. Accurate 3100 gives the best case fill at 100 %, and 123 of the 123 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 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, 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, Hodgdon Superformance, Hodgdon H414 rank at the top here: for .270 Win. Ackley Improved with the .277 | 150gr | Rhino Penetrator 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.