Load Specifications
Load data in caliber .270 Win. with .277 | 129gr | Reichenberg Spezial Jagd 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% | 56,231 psi | 90% | 2867 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,782 psi | 89% | 2897 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,114 psi | 87% | 2897 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,644 psi | 75% | 2858 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 55,869 psi | 90% | 2949 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,260 psi | 90% | 3041 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,492 psi | 89% | 2976 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,214 psi | 85% | 2923 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,085 psi | 87% | 3015 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,462 psi | 87% | 2927 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,608 psi | 89% | 2897 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,637 psi | 89% | 3104 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,650 psi | 86% | 2949 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,085 psi | 87% | 2972 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,592 psi | 86% | 3045 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,737 psi | 88% | 3077 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,026 psi | 85% | 3002 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,034 psi | 71% | 2887 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,893 psi | 80% | 3068 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,521 psi | 89% | 2992 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 54,418 psi | 87% | 2966 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,012 psi | 87% | 2936 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,956 psi | 90% | 2907 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,911 psi | 86% | 2949 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,969 psi | 88% | 2979 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 55,201 psi | 89% | 3038 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 92% | 55,390 psi | 89% | 2995 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 84% | 56,101 psi | 90% | 2986 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,490 psi | 86% | 2969 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,144 psi | 90% | 3025 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,463 psi | 89% | 3071 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 57% | 1844 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,911 psi | 86% | 2936 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,026 psi | 85% | 2920 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,057 psi | 90% | 2959 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,869 psi | 90% | 2943 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 54,636 psi | 88% | 2966 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,941 psi | 90% | 2969 fps | 98.2% |
| IMR 4831 | <<locked>> | 96% | 53,258 psi | 85% | 2979 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 55,492 psi | 89% | 3002 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,462 psi | 87% | 2927 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,753 psi | 89% | 2953 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,679 psi | 88% | 2900 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,043 psi | 90% | 2956 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,622 psi | 89% | 2963 fps | 99.1% |
| Lovex S070 | <<locked>> | 94% | 53,345 psi | 86% | 2949 fps | 98% |
| Norma 201 | <<locked>> | 84% | 54,404 psi | 87% | 2920 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,824 psi | 88% | 2920 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,374 psi | 86% | 2959 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,347 psi | 89% | 3015 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 49,327 psi | 79% | 3015 fps | 97.1% |
| Norma URP | <<locked>> | 96% | 54,969 psi | 88% | 3025 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 53,882 psi | 86% | 2982 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,809 psi | 86% | 3022 fps | 98.7% |
| Ramshot TAC | <<locked>> | 82% | 54,665 psi | 88% | 2943 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,404 psi | 87% | 2963 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,419 psi | 58% | 1886 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,998 psi | 88% | 2959 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,636 psi | 88% | 3041 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,360 psi | 87% | 3074 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,883 psi | 90% | 3061 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,027 psi | 88% | 3091 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 55,158 psi | 88% | 2900 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,911 psi | 88% | 2920 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,273 psi | 87% | 2959 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,112 psi | 84% | 2986 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 92% | 54,012 psi | 87% | 2936 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,622 psi | 89% | 2963 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,753 psi | 89% | 2953 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,043 psi | 90% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,345 psi | 86% | 2949 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,086 psi | 90% | 3025 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,142 psi | 85% | 2920 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,041 psi | 87% | 2946 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,448 psi | 89% | 2854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,173 psi | 90% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,753 psi | 89% | 2917 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,619 psi | 83% | 2979 fps | 96.1% |
| Somchem S335 | <<locked>> | 84% | 55,100 psi | 88% | 2854 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,982 psi | 85% | 2913 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 54,331 psi | 87% | 2956 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,664 psi | 86% | 3031 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,692 psi | 84% | 2963 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 55,825 psi | 90% | 2838 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,969 psi | 88% | 2884 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,376 psi | 89% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,709 psi | 89% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,925 psi | 86% | 2969 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 54,868 psi | 88% | 2923 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,577 psi | 86% | 2894 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 52,852 psi | 85% | 2969 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,994 psi | 79% | 2966 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,838 psi | 86% | 2943 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,230 psi | 89% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,201 psi | 89% | 3038 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,566 psi | 63% | 2907 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,867 psi | 86% | 2953 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% | 52,881 psi | 85% | 2818 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,832 psi | 73% | 2746 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,442 psi | 76% | 2782 fps | 95.8% |
| Accurate 3100 | <<locked>> | 94% | 38,014 psi | 61% | 2684 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 43,352 psi | 70% | 2746 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,708 psi | 56% | 2628 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 48,892 psi | 78% | 2864 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,655 psi | 67% | 2710 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 50,763 psi | 81% | 2956 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,966 psi | 82% | 2871 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,112 psi | 84% | 2848 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,005 psi | 72% | 2910 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,713 psi | 67% | 2736 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,527 psi | 71% | 2802 fps | 99% |
| Alliant Reloder-16 | 45.8 gr | 82% | 34,330 psi | 55% | 2635 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,230 psi | 58% | 2710 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,879 psi | 80% | 2946 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,081 psi | 48% | 2539 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,737 psi | 56% | 2723 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,457 psi | 78% | 2874 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 41,539 psi | 67% | 2740 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 44,962 psi | 72% | 2769 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,431 psi | 84% | 2854 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,473 psi | 81% | 2897 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,148 psi | 68% | 2743 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 42,308 psi | 68% | 2799 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 48,791 psi | 78% | 2881 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,429 psi | 79% | 2877 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,733 psi | 48% | 2474 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,861 psi | 74% | 2854 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,686 psi | 72% | 2871 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 43% | 1650 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,456 psi | 76% | 2828 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 49,705 psi | 80% | 2867 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,787 psi | 70% | 2746 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,180 psi | 74% | 2769 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 45,339 psi | 73% | 2799 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,555 psi | 70% | 2743 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 33,591 psi | 54% | 2582 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 45,658 psi | 73% | 2835 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 50,966 psi | 82% | 2871 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,646 psi | 78% | 2844 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,544 psi | 78% | 2799 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,874 psi | 70% | 2749 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,276 psi | 61% | 2635 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 41,379 psi | 66% | 2720 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 47,877 psi | 77% | 2815 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,472 psi | 78% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,918 psi | 70% | 2789 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 51,634 psi | 83% | 2953 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 43,004 psi | 69% | 2887 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 34,853 psi | 56% | 2628 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,787 psi | 70% | 2805 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,653 psi | 62% | 2723 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 50,995 psi | 82% | 2884 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,952 psi | 82% | 2904 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,238 psi | 44% | 1690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,511 psi | 68% | 2726 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,514 psi | 76% | 2917 fps | 99.3% |
| ReloadSwiss RS 60 | 48.2 gr | 80% | 38,551 psi | 62% | 2779 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,301 psi | 55% | 2638 fps | 95.2% |
| ReloadSwiss RS 70 | 51.4 gr | 84% | 36,477 psi | 58% | 2703 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 51,909 psi | 83% | 2851 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,687 psi | 73% | 2766 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,088 psi | 63% | 2684 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 48,530 psi | 78% | 2923 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 44,962 psi | 72% | 2769 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,276 psi | 61% | 2635 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,646 psi | 78% | 2844 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,874 psi | 70% | 2749 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,379 psi | 66% | 2720 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,103 psi | 64% | 2736 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,748 psi | 80% | 2864 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,398 psi | 76% | 2835 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,936 psi | 78% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,031 psi | 66% | 2618 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,004 psi | 69% | 2694 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,066 psi | 77% | 2917 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 48,660 psi | 78% | 2756 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,298 psi | 79% | 2854 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,697 psi | 64% | 2687 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 29,211 psi | 47% | 2516 fps | 97% |
| Somchem S385 | <<locked>> | 96% | 46,253 psi | 74% | 2848 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,371 psi | 79% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,426 psi | 73% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,832 psi | 73% | 2749 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,811 psi | 61% | 2618 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 33,823 psi | 54% | 2569 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 51,271 psi | 82% | 2867 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,237 psi | 71% | 2740 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,737 psi | 57% | 2628 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 32,779 psi | 53% | 2621 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,417 psi | 54% | 2543 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 51,648 psi | 83% | 2920 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,308 psi | 68% | 2799 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,543 psi | 46% | 2562 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,181 psi | 76% | 2841 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 | 129gr | Reichenberg Spezial Jagd. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,104 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 57–90 %, leaving at least 10 % headroom. The 129.0 gr projectile in 0.277" calls for a 1:12.0 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 | 129gr | Reichenberg Spezial Jagd 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.