Load Specifications
Bullet Manufacturer:Rhino Bullets
Bullet Weight:160 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 | 160gr | Rhino Solid Shank bullet and 122 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 Ramshot Hunter.
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% | 63,875 psi | 88% | 2661 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 64,643 psi | 89% | 2700 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 61,888 psi | 85% | 2743 fps | 99.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,246 psi | 78% | 2740 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 64,890 psi | 89% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 62,569 psi | 86% | 2835 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 58,697 psi | 81% | 2887 fps | 97.6% |
| ADI APS 450 | <<locked>> | 86% | 64,527 psi | 89% | 2133 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 63,556 psi | 88% | 2792 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 64,687 psi | 89% | 2795 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 63,309 psi | 87% | 2884 fps | 99.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,797 psi | 78% | 2828 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,506 psi | 50% | 2500 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 61,685 psi | 85% | 2730 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 64,382 psi | 89% | 2690 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 61,206 psi | 84% | 2881 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 61,902 psi | 85% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 62,236 psi | 86% | 2795 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 62,888 psi | 87% | 2881 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 65,108 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 62,337 psi | 86% | 2871 fps | 99.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,825 psi | 77% | 2825 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,011 psi | 73% | 2753 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,919 psi | 63% | 2694 fps | 99.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 61,250 psi | 84% | 2949 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 63,976 psi | 88% | 2818 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,285 psi | 71% | 2753 fps | 98.3% |
| Bofors RP3 | <<locked>> | 88% | 63,411 psi | 87% | 2789 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,825 psi | 77% | 2825 fps | 99.1% |
| Bofors RP7 | <<locked>> | 92% | 61,975 psi | 85% | 2782 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 62,714 psi | 86% | 2703 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 62,207 psi | 86% | 2766 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,411 psi | 63% | 2631 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 88% | 63,570 psi | 88% | 2812 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 64,687 psi | 89% | 2887 fps | 100% |
| Hodgdon H4350 | <<locked>> | 92% | 63,831 psi | 88% | 2844 fps | 99.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 61,061 psi | 84% | 2831 fps | 98.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 59,611 psi | 82% | 2812 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 84% | 64,339 psi | 89% | 2799 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 63,483 psi | 88% | 2802 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 65,369 psi | 90% | 2841 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,933 psi | 62% | 2730 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 92% | 61,351 psi | 85% | 2881 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 50% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 65,166 psi | 90% | 2795 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 65,528 psi | 90% | 2766 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 64,252 psi | 89% | 2779 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 63,222 psi | 87% | 2776 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 63,034 psi | 87% | 2815 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 92% | 63,788 psi | 88% | 2808 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 62,627 psi | 86% | 2822 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 63,817 psi | 88% | 2818 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 62,149 psi | 86% | 2812 fps | 98.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,070 psi | 75% | 2802 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 82% | 61,685 psi | 85% | 2730 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 64,571 psi | 89% | 2762 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 65,557 psi | 90% | 2759 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 64,411 psi | 89% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 64,005 psi | 88% | 2802 fps | 100% |
| Lovex S070 | <<locked>> | 96% | 65,383 psi | 90% | 2844 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,746 psi | 64% | 2602 fps | 99.3% |
| Norma 201 | <<locked>> | 84% | 61,859 psi | 85% | 2730 fps | 100% |
| Norma 202 | <<locked>> | 84% | 62,801 psi | 87% | 2723 fps | 100% |
| Norma 203B | <<locked>> | 88% | 65,282 psi | 90% | 2825 fps | 100% |
| Norma 204 | <<locked>> | 96% | 64,803 psi | 89% | 2877 fps | 99.6% |
| Norma MRPᴾ | <<locked>> | 100% | 59,756 psi | 82% | 2910 fps | 99.9% |
| Norma URP | <<locked>> | 96% | 64,455 psi | 89% | 2861 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 62,845 psi | 87% | 2812 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,795 psi | 76% | 2822 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 96% | 63,411 psi | 87% | 2874 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,733 psi | 67% | 2700 fps | 98.6% |
| Ramshot TAC | <<locked>> | 82% | 62,192 psi | 86% | 2772 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 62,439 psi | 86% | 2782 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,304 psi | 51% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 63,222 psi | 87% | 2799 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 63,976 psi | 88% | 2864 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 64,556 psi | 89% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 62,265 psi | 86% | 2854 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 65,267 psi | 90% | 2946 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,889 psi | 62% | 2726 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 82% | 62,497 psi | 86% | 2700 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 62,468 psi | 86% | 2730 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 63,295 psi | 87% | 2785 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 64,890 psi | 89% | 2851 fps | 99.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 61,917 psi | 85% | 2861 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 92% | 61,975 psi | 85% | 2782 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 64,005 psi | 88% | 2802 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 84% | 64,571 psi | 89% | 2762 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 64,411 psi | 89% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 65,383 psi | 90% | 2844 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 65,035 psi | 90% | 2844 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 65,427 psi | 90% | 2805 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 61,801 psi | 85% | 2766 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 62,656 psi | 86% | 2657 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 63,744 psi | 88% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 63,831 psi | 88% | 2759 fps | 100% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 61,395 psi | 85% | 2858 fps | 99.5% |
| Somchem S335 | <<locked>> | 84% | 62,120 psi | 86% | 2651 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 65,122 psi | 90% | 2785 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 62,671 psi | 86% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 63,135 psi | 87% | 2799 fps | 98.3% |
| Somchem S365 | <<locked>> | 98% | 64,571 psi | 89% | 2864 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 62,352 psi | 86% | 2831 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 82% | 65,543 psi | 90% | 2644 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 63,164 psi | 87% | 2635 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 63,063 psi | 87% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 63,556 psi | 88% | 2703 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 64,411 psi | 89% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 62,961 psi | 87% | 2808 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,085 psi | 75% | 2707 fps | 99% |
| Vihtavuori N530 | <<locked>> | 82% | 62,410 psi | 86% | 2733 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 65,398 psi | 90% | 2746 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 62,047 psi | 86% | 2815 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 59,190 psi | 82% | 2828 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 59,857 psi | 83% | 2900 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,558 psi | 66% | 2697 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 62,743 psi | 87% | 2772 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 63,730 psi | 88% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 64,687 psi | 89% | 2887 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,066 psi | 66% | 2818 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 62,163 psi | 86% | 2772 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 58,827 psi | 81% | 2779 fps | 99.1% |
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% | 60,075 psi | 83% | 2618 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 53,505 psi | 74% | 2569 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,039 psi | 70% | 2589 fps | 98.7% |
| Accurate 3100 | <<locked>> | 82% | 30,632 psi | 42% | 2274 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 50,705 psi | 70% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,943 psi | 54% | 2470 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 94% | 47,485 psi | 65% | 2707 fps | 95.1% |
| ADI APS 450 | <<locked>> | 80% | 58,653 psi | 81% | 2054 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 56,028 psi | 77% | 2694 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 47,718 psi | 66% | 2559 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,074 psi | 55% | 2503 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 46,528 psi | 64% | 2657 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 98% | 34,374 psi | 47% | 2444 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 58,117 psi | 80% | 2687 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 60,408 psi | 83% | 2644 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,866 psi | 73% | 2766 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,428 psi | 67% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,532 psi | 71% | 2648 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,724 psi | 52% | 2474 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,873 psi | 59% | 2592 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,900 psi | 55% | 2500 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,089 psi | 55% | 2549 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,775 psi | 38% | 2251 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,328 psi | 43% | 2362 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 29,646 psi | 41% | 2356 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 55,854 psi | 77% | 2713 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 39,566 psi | 55% | 2536 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 48,776 psi | 67% | 2595 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,089 psi | 55% | 2549 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,830 psi | 59% | 2480 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 59,088 psi | 81% | 2661 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 58,218 psi | 80% | 2717 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 42,540 psi | 59% | 2575 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 49,066 psi | 68% | 2608 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 40,857 psi | 56% | 2513 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 43,743 psi | 60% | 2530 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 46,615 psi | 64% | 2608 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,849 psi | 67% | 2648 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 56,681 psi | 78% | 2700 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,302 psi | 49% | 2372 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,447 psi | 74% | 2690 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,479 psi | 54% | 2608 fps | 96% |
| Hodgdon Superformance | 50.1 gr | 80% | 39,668 psi | 55% | 2526 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 38% | 1486 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,983 psi | 74% | 2651 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 57,725 psi | 80% | 2674 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,212 psi | 69% | 2589 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,170 psi | 72% | 2618 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 38,493 psi | 53% | 2415 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,237 psi | 61% | 2510 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 37,347 psi | 52% | 2425 fps | 98.9% |
| IMR 4895 | <<locked>> | 80% | 52,866 psi | 73% | 2674 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,643 psi | 63% | 2556 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 44,338 psi | 61% | 2628 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 58,117 psi | 80% | 2687 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 56,739 psi | 78% | 2667 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 54,810 psi | 76% | 2621 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,517 psi | 70% | 2585 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,669 psi | 57% | 2461 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 39,929 psi | 55% | 2444 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 31,937 psi | 44% | 2303 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 54,752 psi | 76% | 2638 fps | 100% |
| Norma 202 | <<locked>> | 80% | 55,593 psi | 77% | 2635 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,879 psi | 70% | 2635 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,393 psi | 56% | 2490 fps | 95.4% |
| Norma MRP | <<locked>> | 84% | 34,243 psi | 47% | 2444 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,609 psi | 53% | 2461 fps | 99% |
| Ramshot Big Game | <<locked>> | 80% | 51,198 psi | 71% | 2657 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,324 psi | 61% | 2641 fps | 95.7% |
| Ramshot Hunter | 46.7 gr | 80% | 37,463 psi | 52% | 2451 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 36,695 psi | 51% | 2464 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 58,030 psi | 80% | 2720 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 58,479 psi | 81% | 2730 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 38% | 1522 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,892 psi | 67% | 2592 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 56,043 psi | 77% | 2762 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,513 psi | 63% | 2638 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,740 psi | 53% | 2487 fps | 98.9% |
| ReloadSwiss RS 70 | 48.1 gr | 80% | 37,289 psi | 51% | 2493 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,303 psi | 50% | 2526 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 58,885 psi | 81% | 2654 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 52,272 psi | 72% | 2595 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,905 psi | 63% | 2546 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,353 psi | 61% | 2539 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 38,928 psi | 54% | 2484 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,830 psi | 59% | 2480 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,669 psi | 57% | 2461 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 56,739 psi | 78% | 2667 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 50,517 psi | 70% | 2585 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,929 psi | 55% | 2444 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,123 psi | 65% | 2598 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 57,246 psi | 79% | 2703 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,549 psi | 75% | 2667 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 55,274 psi | 76% | 2566 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,891 psi | 65% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,814 psi | 56% | 2408 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,566 psi | 53% | 2477 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 55,143 psi | 76% | 2566 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 56,782 psi | 78% | 2687 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,122 psi | 64% | 2543 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,530 psi | 67% | 2585 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 35,230 psi | 49% | 2425 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 37,159 psi | 51% | 2418 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 61,699 psi | 85% | 2602 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 55,869 psi | 77% | 2549 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,504 psi | 72% | 2552 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,649 psi | 73% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,077 psi | 61% | 2474 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,016 psi | 55% | 2461 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 36,434 psi | 50% | 2395 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 58,668 psi | 81% | 2687 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 50,923 psi | 70% | 2569 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,479 psi | 54% | 2461 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 30,748 psi | 42% | 2320 fps | 97.5% |
| Vihtavuori N560 | <<locked>> | 92% | 45,382 psi | 63% | 2664 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 44,585 psi | 61% | 2644 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,943 psi | 54% | 2428 fps | 100% |
| Winchester 748 | <<locked>> | 80% | 59,625 psi | 82% | 2733 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 40,857 psi | 56% | 2513 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,584 psi | 34% | 2231 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 54,766 psi | 76% | 2677 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 38,943 psi | 54% | 2454 fps | 95.1% |
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 | 160gr | Rhino Solid Shank. Alliant Reloder-26 delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,949 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 44–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.277" calls for a 1:10.5 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, Hodgdon Superformance, Ramshot Hunter rank at the top here: for .270 Win. Ackley Improved with the .277 | 160gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 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.