Load Specifications
Load data in caliber .270 Win. with .277 | 130gr | Swift A-Frame bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-16 and ReloadSwiss RS 70.
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% | 56,260 psi | 90% | 2854 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,840 psi | 90% | 2884 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,969 psi | 87% | 2881 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,514 psi | 75% | 2841 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 55,956 psi | 90% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,115 psi | 90% | 3028 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,593 psi | 89% | 2963 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,287 psi | 85% | 2913 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,998 psi | 87% | 3002 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,230 psi | 87% | 2907 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,622 psi | 89% | 2881 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,506 psi | 89% | 3087 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,476 psi | 86% | 2933 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,896 psi | 86% | 2956 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,476 psi | 86% | 3028 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,621 psi | 88% | 3061 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,968 psi | 85% | 2989 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,961 psi | 70% | 2871 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,879 psi | 80% | 3054 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,376 psi | 89% | 2976 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 54,244 psi | 87% | 2953 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,143 psi | 87% | 2923 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,709 psi | 89% | 2887 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,027 psi | 87% | 2940 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,810 psi | 88% | 2963 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 55,085 psi | 88% | 3025 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 92% | 55,259 psi | 89% | 2979 fps | 97% |
| Hodgdon H4895 | <<locked>> | 84% | 56,159 psi | 90% | 2972 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,345 psi | 86% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,985 psi | 90% | 3005 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,405 psi | 89% | 3058 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 58% | 1834 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,664 psi | 86% | 2920 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,011 psi | 85% | 2904 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,115 psi | 90% | 2949 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,709 psi | 89% | 2927 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 54,505 psi | 87% | 2949 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,782 psi | 89% | 2953 fps | 98.2% |
| IMR 4831 | <<locked>> | 96% | 53,113 psi | 85% | 2963 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 55,274 psi | 89% | 2986 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,230 psi | 87% | 2907 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,535 psi | 89% | 2936 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,737 psi | 88% | 2887 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,101 psi | 90% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,463 psi | 89% | 2949 fps | 99.1% |
| Lovex S070 | <<locked>> | 94% | 53,200 psi | 85% | 2933 fps | 98% |
| Norma 201 | <<locked>> | 84% | 54,143 psi | 87% | 2904 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,882 psi | 88% | 2907 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,156 psi | 85% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,230 psi | 89% | 3002 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 49,342 psi | 79% | 3005 fps | 97.1% |
| Norma URP | <<locked>> | 96% | 54,824 psi | 88% | 3009 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 53,722 psi | 86% | 2966 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,708 psi | 86% | 3009 fps | 98.7% |
| Ramshot TAC | <<locked>> | 82% | 54,505 psi | 87% | 2930 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,244 psi | 87% | 2943 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 59% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,143 psi | 88% | 2946 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,418 psi | 87% | 3022 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,201 psi | 87% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,825 psi | 90% | 3048 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,998 psi | 88% | 3077 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 55,158 psi | 88% | 2887 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,955 psi | 88% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,056 psi | 87% | 2943 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,040 psi | 83% | 2972 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 92% | 54,143 psi | 87% | 2923 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,463 psi | 89% | 2949 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,535 psi | 89% | 2936 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,101 psi | 90% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,200 psi | 85% | 2933 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,985 psi | 90% | 3009 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,997 psi | 85% | 2904 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,853 psi | 86% | 2930 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,492 psi | 89% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,927 psi | 90% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,593 psi | 89% | 2900 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,547 psi | 83% | 2966 fps | 96.1% |
| Somchem S335 | <<locked>> | 84% | 54,853 psi | 88% | 2838 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,376 psi | 90% | 2953 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,418 psi | 87% | 2943 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,563 psi | 86% | 3015 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,649 psi | 84% | 2949 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 55,869 psi | 90% | 2825 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,998 psi | 88% | 2871 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,492 psi | 89% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,854 psi | 90% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,838 psi | 86% | 2956 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 54,592 psi | 88% | 2907 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,664 psi | 86% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,405 psi | 90% | 3012 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,892 psi | 78% | 2953 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,795 psi | 86% | 2930 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,013 psi | 88% | 2956 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,085 psi | 88% | 3025 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,566 psi | 63% | 2894 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,998 psi | 87% | 2940 fps | 100% |
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% | 52,852 psi | 85% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,803 psi | 73% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,498 psi | 71% | 2710 fps | 95% |
| Accurate 3100 | <<locked>> | 94% | 37,869 psi | 61% | 2671 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 43,352 psi | 70% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,534 psi | 55% | 2612 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 48,921 psi | 78% | 2851 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,684 psi | 67% | 2700 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 50,691 psi | 81% | 2943 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,024 psi | 82% | 2858 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,127 psi | 84% | 2835 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,092 psi | 72% | 2897 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,713 psi | 67% | 2723 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,556 psi | 71% | 2789 fps | 99% |
| Alliant Reloder-16 | 45.5 gr | 82% | 34,360 psi | 55% | 2625 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,071 psi | 58% | 2697 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,792 psi | 80% | 2933 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,124 psi | 48% | 2530 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,708 psi | 56% | 2713 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,515 psi | 78% | 2861 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 41,553 psi | 67% | 2730 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 44,773 psi | 72% | 2753 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,460 psi | 84% | 2841 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,517 psi | 81% | 2884 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,177 psi | 68% | 2733 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 42,163 psi | 68% | 2782 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 48,617 psi | 78% | 2864 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,429 psi | 79% | 2864 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,718 psi | 48% | 2464 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,658 psi | 73% | 2835 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,614 psi | 72% | 2858 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,847 psi | 43% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,195 psi | 76% | 2808 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 49,661 psi | 80% | 2854 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,772 psi | 70% | 2733 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,963 psi | 74% | 2753 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 45,208 psi | 72% | 2785 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,613 psi | 70% | 2733 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 33,402 psi | 54% | 2566 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 45,658 psi | 73% | 2822 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 51,024 psi | 82% | 2858 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,689 psi | 78% | 2831 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,515 psi | 78% | 2785 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,874 psi | 70% | 2736 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,305 psi | 61% | 2621 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 41,466 psi | 66% | 2710 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,863 psi | 77% | 2799 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,472 psi | 78% | 2808 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,903 psi | 70% | 2776 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 51,532 psi | 83% | 2936 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 42,960 psi | 69% | 2874 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 34,650 psi | 56% | 2612 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 43,888 psi | 70% | 2795 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,522 psi | 62% | 2710 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 51,082 psi | 82% | 2871 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,778 psi | 81% | 2887 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 44% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,322 psi | 68% | 2713 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,587 psi | 76% | 2904 fps | 99.4% |
| ReloadSwiss RS 60 | 47.8 gr | 80% | 38,377 psi | 62% | 2762 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,345 psi | 55% | 2628 fps | 95.2% |
| ReloadSwiss RS 70 | 51 gr | 84% | 36,390 psi | 58% | 2690 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 51,909 psi | 83% | 2838 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,701 psi | 73% | 2753 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,073 psi | 63% | 2671 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 48,428 psi | 78% | 2907 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 44,773 psi | 72% | 2753 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,305 psi | 61% | 2621 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,689 psi | 78% | 2831 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,874 psi | 70% | 2736 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,466 psi | 66% | 2710 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,103 psi | 64% | 2720 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,501 psi | 79% | 2844 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,442 psi | 76% | 2822 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,921 psi | 78% | 2743 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,017 psi | 66% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,830 psi | 69% | 2677 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,964 psi | 77% | 2904 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 48,660 psi | 78% | 2746 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,414 psi | 79% | 2841 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,668 psi | 64% | 2674 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 29,051 psi | 47% | 2500 fps | 97% |
| Somchem S385 | <<locked>> | 96% | 46,166 psi | 74% | 2835 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,371 psi | 79% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,353 psi | 73% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,818 psi | 73% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,797 psi | 61% | 2605 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 33,823 psi | 54% | 2559 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 51,314 psi | 82% | 2854 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,295 psi | 71% | 2726 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,752 psi | 57% | 2615 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 32,837 psi | 53% | 2612 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,504 psi | 54% | 2533 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 51,372 psi | 82% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,163 psi | 68% | 2782 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,442 psi | 46% | 2549 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,210 psi | 76% | 2828 fps | 99.8% |
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 115 powders for .270 Win. loaded with the .277 | 130gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,087 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,087 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.277" calls for a 1:12.5 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 60, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .270 Win. with the .277 | 130gr | Swift A-Frame they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Alliant Reloder-22 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.