Load Specifications
Load data in caliber .270 Win. with .277 | 130gr | Rhino Solid Shank bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Reloder-16.
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% | 56,376 psi | 90% | 2854 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,651 psi | 89% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,114 psi | 87% | 2884 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,369 psi | 74% | 2841 fps | 97.4% |
| Accurate 4064 | <<locked>> | 88% | 55,782 psi | 89% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,275 psi | 90% | 3028 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,376 psi | 89% | 2959 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,434 psi | 90% | 2963 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,824 psi | 86% | 2999 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,317 psi | 87% | 2910 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,753 psi | 89% | 2884 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,608 psi | 89% | 3091 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,577 psi | 86% | 2936 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,998 psi | 87% | 2956 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,316 psi | 85% | 3025 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,462 psi | 87% | 3058 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,837 psi | 85% | 2986 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,830 psi | 70% | 2871 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,676 psi | 80% | 3051 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,477 psi | 89% | 2979 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 54,027 psi | 87% | 2946 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,983 psi | 87% | 2920 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,796 psi | 89% | 2890 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,853 psi | 86% | 2936 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,926 psi | 88% | 2963 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 54,897 psi | 88% | 3018 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 92% | 55,100 psi | 88% | 2976 fps | 97% |
| Hodgdon H4895 | <<locked>> | 84% | 55,956 psi | 90% | 2969 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,461 psi | 86% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,782 psi | 89% | 3005 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,274 psi | 89% | 3054 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 58% | 1834 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,795 psi | 86% | 2920 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,347 psi | 90% | 2953 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,912 psi | 90% | 2943 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,492 psi | 89% | 2923 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 54,694 psi | 88% | 2953 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,637 psi | 89% | 2949 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 56,405 psi | 90% | 3015 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 55,405 psi | 89% | 2989 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,317 psi | 87% | 2910 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,651 psi | 89% | 2936 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,592 psi | 88% | 2884 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,956 psi | 90% | 2940 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,317 psi | 89% | 2946 fps | 99.1% |
| Lovex S070 | <<locked>> | 94% | 53,055 psi | 85% | 2930 fps | 98% |
| Norma 201 | <<locked>> | 84% | 54,259 psi | 87% | 2907 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,665 psi | 88% | 2904 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,258 psi | 85% | 2943 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,056 psi | 88% | 2999 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 49,139 psi | 79% | 3002 fps | 97.1% |
| Norma URP | <<locked>> | 96% | 55,027 psi | 88% | 3012 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 53,838 psi | 86% | 2969 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,534 psi | 86% | 3005 fps | 98.7% |
| Ramshot TAC | <<locked>> | 82% | 54,317 psi | 87% | 2927 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,346 psi | 87% | 2946 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,564 psi | 59% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,955 psi | 88% | 2943 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,563 psi | 87% | 3022 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,041 psi | 87% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,956 psi | 90% | 3048 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,795 psi | 88% | 3074 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 54,984 psi | 88% | 2884 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,810 psi | 88% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,172 psi | 87% | 2946 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,822 psi | 83% | 2969 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 92% | 53,983 psi | 87% | 2920 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,317 psi | 89% | 2946 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,651 psi | 89% | 2936 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,956 psi | 90% | 2940 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,055 psi | 85% | 2930 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,767 psi | 89% | 3005 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,113 psi | 85% | 2907 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,954 psi | 87% | 2933 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,288 psi | 89% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,782 psi | 89% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,419 psi | 89% | 2897 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,329 psi | 82% | 2963 fps | 96.1% |
| Somchem S335 | <<locked>> | 84% | 54,955 psi | 88% | 2838 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,620 psi | 84% | 2894 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 54,244 psi | 87% | 2940 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,388 psi | 86% | 3015 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,475 psi | 84% | 2946 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 55,680 psi | 89% | 2825 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,795 psi | 88% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,274 psi | 89% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,680 psi | 89% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,621 psi | 86% | 2949 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 54,723 psi | 88% | 2907 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,505 psi | 86% | 2877 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,217 psi | 90% | 3009 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2946 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,635 psi | 86% | 2927 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,114 psi | 88% | 2959 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,216 psi | 89% | 3025 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,436 psi | 63% | 2894 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,838 psi | 86% | 2936 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% | 52,953 psi | 85% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,919 psi | 74% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,369 psi | 76% | 2766 fps | 95.8% |
| Accurate 3100 | <<locked>> | 96% | 40,553 psi | 65% | 2726 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 43,453 psi | 70% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,577 psi | 55% | 2612 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 48,776 psi | 78% | 2851 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,524 psi | 67% | 2694 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 50,517 psi | 81% | 2940 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,821 psi | 81% | 2854 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,214 psi | 84% | 2838 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,918 psi | 72% | 2894 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,524 psi | 67% | 2720 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,353 psi | 71% | 2782 fps | 98.9% |
| Alliant Reloder-16 | 45.5 gr | 82% | 34,418 psi | 55% | 2625 fps | 95.8% |
| Alliant Reloder-17 | 47.8 gr | 80% | 36,143 psi | 58% | 2697 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,661 psi | 80% | 2930 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,023 psi | 48% | 2526 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,751 psi | 56% | 2713 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,356 psi | 78% | 2858 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 41,408 psi | 66% | 2726 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 44,860 psi | 72% | 2756 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,286 psi | 84% | 2835 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,314 psi | 81% | 2881 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,047 psi | 67% | 2730 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 42,018 psi | 67% | 2779 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 88% | 48,472 psi | 78% | 2861 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 49,255 psi | 79% | 2861 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,791 psi | 48% | 2464 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,745 psi | 73% | 2838 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,454 psi | 71% | 2854 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 43% | 1637 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,282 psi | 76% | 2812 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 49,487 psi | 79% | 2851 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,642 psi | 70% | 2733 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,064 psi | 74% | 2756 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 45,295 psi | 73% | 2785 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,468 psi | 70% | 2730 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 33,460 psi | 54% | 2569 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 45,484 psi | 73% | 2815 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 50,821 psi | 81% | 2854 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,530 psi | 78% | 2828 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,370 psi | 78% | 2782 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,729 psi | 70% | 2733 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,392 psi | 62% | 2625 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 41,292 psi | 66% | 2707 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 47,950 psi | 77% | 2802 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,327 psi | 77% | 2802 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,772 psi | 70% | 2772 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 51,648 psi | 83% | 2940 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 42,786 psi | 69% | 2871 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 34,708 psi | 56% | 2612 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 43,700 psi | 70% | 2792 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,609 psi | 62% | 2710 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 50,923 psi | 82% | 2867 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,865 psi | 82% | 2890 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,064 psi | 43% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,395 psi | 68% | 2713 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,369 psi | 76% | 2900 fps | 99.3% |
| ReloadSwiss RS 60 | 47.8 gr | 80% | 38,450 psi | 62% | 2762 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,185 psi | 55% | 2625 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 36,274 psi | 58% | 2687 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 52,011 psi | 83% | 2838 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,542 psi | 73% | 2749 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,928 psi | 62% | 2667 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 98% | 48,544 psi | 78% | 2910 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 44,860 psi | 72% | 2756 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,392 psi | 62% | 2625 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,530 psi | 78% | 2828 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,729 psi | 70% | 2733 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,292 psi | 66% | 2707 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,972 psi | 64% | 2720 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,617 psi | 80% | 2848 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,282 psi | 76% | 2818 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,994 psi | 79% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,104 psi | 66% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,917 psi | 69% | 2677 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,080 psi | 77% | 2904 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 48,747 psi | 78% | 2746 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,226 psi | 79% | 2838 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,755 psi | 64% | 2674 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 29,124 psi | 47% | 2503 fps | 97% |
| Somchem S385 | <<locked>> | 96% | 45,992 psi | 74% | 2831 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,443 psi | 79% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,440 psi | 73% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,658 psi | 73% | 2733 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,666 psi | 60% | 2602 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 33,692 psi | 54% | 2556 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 51,097 psi | 82% | 2851 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,106 psi | 71% | 2723 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,650 psi | 57% | 2615 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 32,706 psi | 52% | 2608 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,373 psi | 54% | 2530 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 51,474 psi | 83% | 2904 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,250 psi | 68% | 2782 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,369 psi | 45% | 2546 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,065 psi | 75% | 2825 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 | Rhino Solid Shank. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,091 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,091 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. Alliant Reloder-17, ReloadSwiss RS 60, Alliant Reloder-16 rank at the top here: for .270 Win. with the .277 | 130gr | Rhino Solid Shank 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.