Load Specifications
Bullet Manufacturer:Fox Bullets
Bullet Weight:145 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 | 145gr | Fox Classic Hunter bullet and 120 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, 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>> | 86% | 65,253 psi | 90% | 2812 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 63,875 psi | 88% | 2851 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 64,948 psi | 90% | 2844 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 62,990 psi | 87% | 2874 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 63,744 psi | 88% | 2887 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,167 psi | 66% | 2743 fps | 98.7% |
| Accurate 4064 | <<locked>> | 92% | 65,093 psi | 90% | 2900 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 62,439 psi | 86% | 2966 fps | 100% |
| ADI APS 450 | <<locked>> | 86% | 64,252 psi | 89% | 2218 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 64,846 psi | 89% | 2943 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 61,989 psi | 85% | 2894 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,898 psi | 77% | 2900 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 63,483 psi | 88% | 2887 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 65,456 psi | 90% | 2841 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 62,120 psi | 86% | 3031 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,724 psi | 77% | 2894 fps | 97.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,724 psi | 77% | 2894 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 62,729 psi | 87% | 2913 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 64,295 psi | 89% | 2808 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 63,179 psi | 87% | 2940 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 63,179 psi | 87% | 3022 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 65,543 psi | 90% | 3054 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,868 psi | 76% | 2884 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,312 psi | 67% | 2822 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,455 psi | 63% | 2766 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,740 psi | 55% | 2677 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,083 psi | 72% | 2956 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 65,499 psi | 90% | 2969 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 63,730 psi | 88% | 2930 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,312 psi | 67% | 2822 fps | 96.6% |
| Bofors RP7 | <<locked>> | 96% | 62,975 psi | 87% | 2917 fps | 99.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 64,440 psi | 89% | 2858 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 63,773 psi | 88% | 2920 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 62,555 psi | 86% | 2982 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 64,179 psi | 89% | 2864 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 64,614 psi | 89% | 2956 fps | 100% |
| Hodgdon H414 | <<locked>> | 98% | 65,137 psi | 90% | 3025 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 96% | 65,064 psi | 90% | 2986 fps | 99.2% |
| Hodgdon H4895 | <<locked>> | 88% | 65,572 psi | 90% | 2949 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 59,321 psi | 82% | 2887 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 61,844 psi | 85% | 2936 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 62,236 psi | 86% | 3018 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,868 psi | 49% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 62,772 psi | 87% | 2900 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 62,323 psi | 86% | 2871 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 65,427 psi | 90% | 2923 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 65,079 psi | 90% | 2920 fps | 99.7% |
| IMR 4198 | <<locked>> | 82% | 63,831 psi | 88% | 2762 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 63,962 psi | 88% | 2949 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 96% | 65,137 psi | 90% | 2949 fps | 99.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 62,758 psi | 87% | 2956 fps | 100% |
| IMR 4895 | <<locked>> | 90% | 64,875 psi | 89% | 2969 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 55,448 psi | 76% | 2828 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 86% | 63,483 psi | 88% | 2887 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 64,208 psi | 89% | 2871 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 61,235 psi | 84% | 2861 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 63,541 psi | 88% | 2861 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 65,238 psi | 90% | 2913 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 64,513 psi | 89% | 2933 fps | 100% |
| Lovex S070 | <<locked>> | 98% | 62,105 psi | 86% | 2927 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,798 psi | 55% | 2592 fps | 96.9% |
| Norma 201 | <<locked>> | 88% | 62,961 psi | 87% | 2877 fps | 100% |
| Norma 202 | <<locked>> | 88% | 64,034 psi | 88% | 2874 fps | 100% |
| Norma 203B | <<locked>> | 90% | 62,323 psi | 86% | 2927 fps | 100% |
| Norma 204 | <<locked>> | 98% | 61,511 psi | 85% | 2956 fps | 98.5% |
| Norma MRPᴾ | <<locked>> | 100% | 51,169 psi | 71% | 2907 fps | 98.5% |
| Norma URPᴾ | <<locked>> | 100% | 64,861 psi | 89% | 3002 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 63,686 psi | 88% | 2956 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 63,730 psi | 88% | 3009 fps | 100% |
| Ramshot TAC | <<locked>> | 86% | 63,947 psi | 88% | 2923 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 86% | 63,918 psi | 88% | 2933 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 64,295 psi | 89% | 2890 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,535 psi | 50% | 1775 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 62,410 psi | 86% | 2854 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 64,469 psi | 89% | 2940 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 65,021 psi | 90% | 3018 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 64,905 psi | 90% | 3045 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 62,366 psi | 86% | 2992 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 61,105 psi | 84% | 3025 fps | 100% |
| Rottweil R 901 | <<locked>> | 86% | 63,498 psi | 88% | 2848 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 63,614 psi | 88% | 2877 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 63,570 psi | 88% | 2923 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 57,595 psi | 79% | 2867 fps | 97.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,998 psi | 74% | 2871 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 96% | 62,975 psi | 87% | 2917 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 98% | 64,513 psi | 89% | 2933 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 86% | 61,235 psi | 84% | 2861 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 65,238 psi | 90% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 62,105 psi | 86% | 2927 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 61,960 psi | 85% | 2940 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 62,598 psi | 86% | 2904 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 63,353 psi | 87% | 2917 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 64,194 psi | 89% | 2802 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 65,238 psi | 90% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 65,151 psi | 90% | 2897 fps | 99.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,505 psi | 74% | 2864 fps | 97.7% |
| Somchem S321 | <<locked>> | 84% | 65,325 psi | 90% | 2920 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 63,498 psi | 88% | 2799 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 62,395 psi | 86% | 2887 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 63,556 psi | 88% | 2920 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 59,828 psi | 83% | 2864 fps | 96.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 59,669 psi | 82% | 2946 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,549 psi | 75% | 2848 fps | 98.5% |
| Vihtavuori N130 | <<locked>> | 84% | 63,440 psi | 87% | 2756 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 64,571 psi | 89% | 2782 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 64,092 psi | 88% | 2831 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 64,556 psi | 89% | 2848 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 65,354 psi | 90% | 2890 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 63,498 psi | 88% | 2946 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,992 psi | 65% | 2710 fps | 96.7% |
| Vihtavuori N530 | <<locked>> | 86% | 64,266 psi | 89% | 2887 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 62,787 psi | 87% | 2851 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 62,381 psi | 86% | 2953 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,720 psi | 70% | 2844 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 63,773 psi | 88% | 2913 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 65,137 psi | 90% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 65,543 psi | 90% | 3028 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,785 psi | 56% | 2805 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 88% | 63,527 psi | 88% | 2923 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,314 psi | 71% | 2785 fps | 97% |
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% | 54,114 psi | 75% | 2677 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 59,973 psi | 83% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,746 psi | 64% | 2608 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 55,027 psi | 76% | 2772 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,658 psi | 63% | 2608 fps | 96.5% |
| Accurate 3100 | <<locked>> | 92% | 36,448 psi | 50% | 2520 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 44,309 psi | 61% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,243 psi | 46% | 2461 fps | 96.6% |
| ADI APS 450 | <<locked>> | 80% | 58,247 psi | 80% | 2139 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 50,415 psi | 70% | 2736 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,830 psi | 59% | 2592 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 45,818 psi | 63% | 2726 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,576 psi | 73% | 2740 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 53,853 psi | 74% | 2707 fps | 100% |
| Alliant Power Pro 2000-MR | 47.1 gr | 80% | 46,470 psi | 64% | 2789 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 45,818 psi | 63% | 2726 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 45,818 psi | 63% | 2726 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,670 psi | 59% | 2612 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 60,684 psi | 84% | 2766 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,934 psi | 63% | 2680 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,127 psi | 46% | 2474 fps | 96.7% |
| Alliant Reloder-17 | 46.4 gr | 80% | 37,202 psi | 51% | 2602 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,194 psi | 62% | 2720 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,179 psi | 62% | 2762 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,195 psi | 38% | 2336 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,969 psi | 48% | 2559 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 88% | 33,315 psi | 46% | 2566 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,922 psi | 69% | 2749 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 42,554 psi | 59% | 2618 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 45,179 psi | 62% | 2762 fps | 95.8% |
| Bofors RP7 | <<locked>> | 82% | 40,422 psi | 56% | 2543 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,882 psi | 74% | 2717 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,851 psi | 72% | 2762 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 57,943 psi | 80% | 2920 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 60,162 psi | 83% | 2818 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,265 psi | 60% | 2628 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 37,942 psi | 52% | 2566 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 44,179 psi | 61% | 2651 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 50,937 psi | 70% | 2749 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,501 psi | 42% | 2372 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,239 psi | 65% | 2723 fps | 100% |
| Hodgdon Superformance | 51.5 gr | 84% | 39,885 psi | 55% | 2638 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 37% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,660 psi | 67% | 2697 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,329 psi | 71% | 2730 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,991 psi | 62% | 2625 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,326 psi | 65% | 2651 fps | 97.7% |
| IMR 4198 | <<locked>> | 80% | 60,176 psi | 83% | 2720 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 41,031 psi | 57% | 2575 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,450 psi | 54% | 2520 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 32,227 psi | 44% | 2421 fps | 96.3% |
| IMR 4895 | <<locked>> | 80% | 47,094 psi | 65% | 2710 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,025 psi | 72% | 2772 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 52,576 psi | 73% | 2740 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 59,872 psi | 83% | 2818 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,067 psi | 69% | 2710 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,792 psi | 69% | 2667 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,991 psi | 62% | 2625 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,869 psi | 51% | 2470 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 37,463 psi | 52% | 2503 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 34,853 psi | 48% | 2484 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 49,052 psi | 68% | 2684 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,617 psi | 68% | 2684 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,295 psi | 62% | 2667 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 46,586 psi | 64% | 2723 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 38,696 psi | 53% | 2657 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 33,504 psi | 46% | 2464 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 80% | 45,150 psi | 62% | 2684 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 34,693 psi | 48% | 2500 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 52,359 psi | 72% | 2756 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,417 psi | 72% | 2776 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 56,289 psi | 78% | 2785 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 38% | 1585 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 58,624 psi | 81% | 2808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,453 psi | 60% | 2608 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,255 psi | 68% | 2792 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,639 psi | 55% | 2661 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,025 psi | 46% | 2477 fps | 96.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 32,489 psi | 45% | 2477 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 52,866 psi | 73% | 2707 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,760 psi | 64% | 2638 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,161 psi | 55% | 2566 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 50,850 psi | 70% | 2762 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 44,034 psi | 61% | 2697 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 40,422 psi | 56% | 2543 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,869 psi | 51% | 2470 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,067 psi | 69% | 2710 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,991 psi | 62% | 2625 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,463 psi | 52% | 2503 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,379 psi | 57% | 2618 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,068 psi | 70% | 2736 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,805 psi | 67% | 2707 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,038 psi | 69% | 2621 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,018 psi | 58% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,609 psi | 53% | 2470 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 43,642 psi | 60% | 2694 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 57,058 psi | 79% | 2815 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 49,864 psi | 69% | 2621 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,763 psi | 70% | 2726 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,727 psi | 56% | 2569 fps | 99.6% |
| Somchem S361 | <<locked>> | 96% | 52,417 psi | 72% | 2756 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 29,921 psi | 41% | 2415 fps | 98.5% |
| Somchem S385 | <<locked>> | 92% | 41,698 psi | 57% | 2621 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 56,231 psi | 78% | 2667 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 50,589 psi | 70% | 2608 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,572 psi | 64% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,195 psi | 65% | 2621 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,899 psi | 54% | 2503 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,925 psi | 48% | 2467 fps | 97% |
| Vihtavuori N165 | <<locked>> | 96% | 41,104 psi | 57% | 2598 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 52,634 psi | 73% | 2733 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,368 psi | 63% | 2612 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,258 psi | 47% | 2464 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 84% | 29,617 psi | 41% | 2408 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,214 psi | 47% | 2438 fps | 98.7% |
| Winchester 748 | <<locked>> | 80% | 53,113 psi | 73% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 38,145 psi | 53% | 2572 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,238 psi | 38% | 2418 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,718 psi | 67% | 2717 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 44,469 psi | 61% | 2667 fps | 95.2% |
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 120 powders for .270 Win. Ackley Improved loaded with the .277 | 145gr | Fox Classic Hunter. Alliant Reloder-17 delivers the highest muzzle velocity at 3,054 fps; across all powders the maximum-charge window runs from 1,729 fps to 3,054 fps. Accurate 3100 gives the best case fill at 100 %, and 120 of the 120 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (500 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.277" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .270 Win. Ackley Improved with the .277 | 145gr | Fox Classic Hunter 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.