Load Specifications
Load data in caliber .270 Win. with .277 | 130gr | Woodleigh Weldcore PP SN 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.
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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% | 56,246 psi | 90% | 2854 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,564 psi | 89% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,012 psi | 87% | 2881 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,557 psi | 75% | 2844 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 55,999 psi | 90% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,173 psi | 90% | 3028 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,593 psi | 89% | 2963 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,301 psi | 85% | 2913 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,041 psi | 87% | 3002 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,201 psi | 87% | 2907 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,666 psi | 89% | 2884 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,477 psi | 89% | 3087 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,476 psi | 86% | 2936 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,911 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% | 52,982 psi | 85% | 2989 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,758 psi | 70% | 2867 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,893 psi | 80% | 3054 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,347 psi | 89% | 2976 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 54,215 psi | 87% | 2953 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,157 psi | 87% | 2927 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,680 psi | 89% | 2890 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,027 psi | 87% | 2940 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,781 psi | 88% | 2963 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 55,129 psi | 88% | 3022 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 92% | 55,303 psi | 89% | 2982 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 84% | 56,202 psi | 90% | 2976 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,388 psi | 86% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,028 psi | 90% | 3009 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,463 psi | 89% | 3058 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 58% | 1834 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,708 psi | 86% | 2920 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,040 psi | 85% | 2904 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,159 psi | 90% | 2949 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,695 psi | 89% | 2927 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 54,549 psi | 87% | 2949 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,796 psi | 89% | 2953 fps | 98.2% |
| IMR 4831 | <<locked>> | 96% | 52,808 psi | 85% | 2959 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 55,317 psi | 89% | 2986 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,201 psi | 87% | 2907 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,579 psi | 89% | 2936 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,781 psi | 88% | 2890 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,144 psi | 90% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,477 psi | 89% | 2949 fps | 99.1% |
| Lovex S070 | <<locked>> | 94% | 53,243 psi | 85% | 2933 fps | 98% |
| Norma 201 | <<locked>> | 84% | 54,186 psi | 87% | 2907 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,868 psi | 88% | 2907 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,200 psi | 85% | 2943 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,288 psi | 89% | 3002 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 49,342 psi | 79% | 3005 fps | 97.1% |
| Norma URP | <<locked>> | 96% | 54,882 psi | 88% | 3012 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 53,737 psi | 86% | 2966 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,751 psi | 86% | 3005 fps | 98.7% |
| Ramshot TAC | <<locked>> | 82% | 54,476 psi | 87% | 2930 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,215 psi | 87% | 2943 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,521 psi | 59% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,129 psi | 88% | 2946 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,462 psi | 87% | 3022 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,244 psi | 87% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,869 psi | 90% | 3048 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,984 psi | 88% | 3077 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 55,201 psi | 89% | 2887 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,708 psi | 88% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,099 psi | 87% | 2943 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,735 psi | 83% | 2966 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 92% | 54,157 psi | 87% | 2927 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,477 psi | 89% | 2949 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,579 psi | 89% | 2936 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,144 psi | 90% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,243 psi | 85% | 2933 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,970 psi | 90% | 3009 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,997 psi | 85% | 2904 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,882 psi | 86% | 2930 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,492 psi | 89% | 2844 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,970 psi | 90% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,651 psi | 89% | 2900 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,242 psi | 82% | 2959 fps | 96% |
| Somchem S335 | <<locked>> | 84% | 54,897 psi | 88% | 2838 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,405 psi | 90% | 2953 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,433 psi | 87% | 2943 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,243 psi | 85% | 3012 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,692 psi | 84% | 2949 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 55,883 psi | 90% | 2825 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,737 psi | 88% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,492 psi | 89% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,898 psi | 90% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,824 psi | 86% | 2956 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 54,636 psi | 88% | 2907 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,708 psi | 86% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 52,765 psi | 85% | 2956 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,936 psi | 78% | 2949 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,519 psi | 86% | 2927 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,056 psi | 88% | 2959 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,129 psi | 88% | 3022 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,363 psi | 63% | 2890 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,012 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% | 52,895 psi | 85% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,847 psi | 74% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,498 psi | 71% | 2710 fps | 95% |
| Accurate 3100 | <<locked>> | 94% | 37,913 psi | 61% | 2667 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 43,395 psi | 70% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,519 psi | 55% | 2612 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 48,950 psi | 78% | 2854 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,437 psi | 66% | 2694 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 50,444 psi | 81% | 2940 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,010 psi | 82% | 2858 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,098 psi | 84% | 2835 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,136 psi | 72% | 2900 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,481 psi | 67% | 2720 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,585 psi | 71% | 2789 fps | 99% |
| Alliant Reloder-16 | 45.5 gr | 82% | 34,330 psi | 55% | 2625 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,100 psi | 58% | 2694 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,530 psi | 79% | 2927 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,153 psi | 48% | 2530 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,693 psi | 56% | 2710 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,544 psi | 78% | 2861 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 41,568 psi | 67% | 2730 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 44,802 psi | 72% | 2753 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,460 psi | 84% | 2841 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,560 psi | 81% | 2884 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,206 psi | 68% | 2733 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 42,163 psi | 68% | 2782 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 48,660 psi | 78% | 2864 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,472 psi | 79% | 2864 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,704 psi | 48% | 2464 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,687 psi | 73% | 2838 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,643 psi | 72% | 2861 fps | 95.5% |
| 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% | 49,705 psi | 80% | 2854 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,540 psi | 70% | 2730 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,963 psi | 74% | 2753 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 45,179 psi | 72% | 2782 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,642 psi | 70% | 2733 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 33,417 psi | 54% | 2566 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 45,687 psi | 73% | 2818 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 51,010 psi | 82% | 2858 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,733 psi | 78% | 2831 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,298 psi | 77% | 2782 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,627 psi | 70% | 2733 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,334 psi | 61% | 2625 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 41,452 psi | 66% | 2710 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 47,892 psi | 77% | 2802 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,211 psi | 77% | 2802 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,947 psi | 70% | 2776 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 51,576 psi | 83% | 2940 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 42,975 psi | 69% | 2874 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 34,664 psi | 56% | 2612 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 43,859 psi | 70% | 2795 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,551 psi | 62% | 2710 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 51,111 psi | 82% | 2871 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,778 psi | 81% | 2887 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 44% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,351 psi | 68% | 2713 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,543 psi | 76% | 2904 fps | 99.4% |
| ReloadSwiss RS 60 | 47.8 gr | 80% | 38,406 psi | 62% | 2762 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,330 psi | 55% | 2628 fps | 95.2% |
| ReloadSwiss RS 70 | 51 gr | 84% | 36,405 psi | 58% | 2690 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 51,924 psi | 83% | 2838 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,716 psi | 73% | 2753 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,088 psi | 63% | 2671 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 48,472 psi | 78% | 2910 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 44,802 psi | 72% | 2753 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,334 psi | 61% | 2625 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,733 psi | 78% | 2831 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,627 psi | 70% | 2733 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,452 psi | 66% | 2710 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,132 psi | 64% | 2723 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,545 psi | 79% | 2848 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,471 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% | 41,060 psi | 66% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,859 psi | 69% | 2677 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,008 psi | 77% | 2904 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 48,689 psi | 78% | 2743 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,385 psi | 79% | 2841 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,697 psi | 64% | 2674 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 29,080 psi | 47% | 2500 fps | 97% |
| Somchem S385 | <<locked>> | 96% | 46,137 psi | 74% | 2831 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,342 psi | 79% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,382 psi | 73% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,861 psi | 74% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,826 psi | 61% | 2605 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 33,837 psi | 54% | 2559 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 51,285 psi | 82% | 2854 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,266 psi | 71% | 2726 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,578 psi | 57% | 2612 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 32,866 psi | 53% | 2608 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,489 psi | 54% | 2533 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 51,416 psi | 82% | 2904 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,163 psi | 68% | 2782 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,471 psi | 46% | 2552 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,239 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 | Woodleigh Weldcore PP SN. 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 | Woodleigh Weldcore PP SN 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.