Load Specifications
Load data in caliber .270 Win. with .277 | 130gr | Winchester Powerpoint 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 70, Alliant Reloder-16 and Hodgdon Superformance.
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 2495 | <<locked>> | 84% | 53,200 psi | 85% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,766 psi | 88% | 2900 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,572 psi | 76% | 2864 fps | 97.8% |
| Accurate 4064 | <<locked>> | 86% | 53,301 psi | 85% | 2900 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,403 psi | 86% | 2989 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 56,217 psi | 90% | 2979 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,867 psi | 86% | 2927 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,998 psi | 88% | 3025 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,187 psi | 88% | 2927 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,405 psi | 90% | 3107 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,752 psi | 88% | 3018 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,404 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,853 psi | 88% | 2976 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,302 psi | 87% | 3048 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,811 psi | 89% | 3084 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,925 psi | 86% | 3009 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,643 psi | 72% | 2887 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,378 psi | 63% | 2785 fps | 96.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,821 psi | 81% | 3074 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,231 psi | 90% | 2995 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 55,129 psi | 88% | 2969 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,940 psi | 88% | 2943 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,333 psi | 90% | 2904 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,955 psi | 88% | 2956 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,622 psi | 89% | 2979 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 94% | 55,927 psi | 90% | 3041 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 92% | 56,028 psi | 90% | 3002 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 82% | 53,534 psi | 86% | 2936 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,505 psi | 87% | 2972 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,243 psi | 85% | 2969 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,333 psi | 90% | 3077 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,955 psi | 58% | 1841 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,607 psi | 88% | 2940 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,824 psi | 86% | 2920 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,417 psi | 86% | 2910 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 52,982 psi | 85% | 2887 fps | 97.9% |
| IMR 4350 | <<locked>> | 96% | 55,564 psi | 89% | 2972 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,301 psi | 85% | 2920 fps | 97.8% |
| IMR 4831 | <<locked>> | 96% | 53,954 psi | 87% | 2982 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 56,217 psi | 90% | 3005 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,187 psi | 88% | 2927 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 52,866 psi | 85% | 2900 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,361 psi | 89% | 2904 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,461 psi | 86% | 2907 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,246 psi | 90% | 2966 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 54,027 psi | 87% | 2949 fps | 98.3% |
| Norma 201 | <<locked>> | 84% | 55,143 psi | 88% | 2923 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,564 psi | 89% | 2920 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,070 psi | 87% | 2959 fps | 100% |
| Norma 204 | <<locked>> | 96% | 56,304 psi | 90% | 3025 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 50,227 psi | 81% | 3025 fps | 97.4% |
| Norma URP | <<locked>> | 96% | 56,043 psi | 90% | 3035 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 54,578 psi | 88% | 2982 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,795 psi | 88% | 3028 fps | 98.9% |
| Ramshot TAC | <<locked>> | 82% | 55,259 psi | 89% | 2946 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,100 psi | 88% | 2963 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,579 psi | 59% | 1886 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,927 psi | 90% | 2966 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,434 psi | 89% | 3041 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,114 psi | 88% | 3077 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,171 psi | 85% | 3009 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,985 psi | 90% | 3100 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 55,941 psi | 90% | 2904 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,637 psi | 89% | 2923 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,013 psi | 88% | 2959 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,779 psi | 85% | 2989 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 92% | 54,940 psi | 88% | 2943 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,246 psi | 90% | 2966 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 52,866 psi | 85% | 2900 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,461 psi | 86% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,027 psi | 87% | 2949 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,185 psi | 85% | 2969 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,867 psi | 86% | 2923 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,708 psi | 88% | 2949 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,188 psi | 90% | 2858 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,476 psi | 86% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,333 psi | 90% | 2920 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,286 psi | 84% | 2982 fps | 96.4% |
| Somchem S335 | <<locked>> | 84% | 55,796 psi | 89% | 2854 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,635 psi | 86% | 2917 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,332 psi | 89% | 2959 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,491 psi | 87% | 3031 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,664 psi | 86% | 2972 fps | 97.5% |
| Vihtavuori N133 | <<locked>> | 82% | 53,243 psi | 85% | 2795 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,796 psi | 89% | 2887 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,086 psi | 90% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,040 psi | 85% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,636 psi | 88% | 2972 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 55,564 psi | 89% | 2927 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,520 psi | 87% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,795 psi | 86% | 2976 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,734 psi | 80% | 2969 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,418 psi | 87% | 2943 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,985 psi | 90% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,202 psi | 90% | 3045 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,321 psi | 65% | 2920 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,868 psi | 88% | 2959 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 2495 | <<locked>> | 80% | 46,601 psi | 75% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,034 psi | 72% | 2726 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 38,609 psi | 62% | 2687 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 44,106 psi | 71% | 2749 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,866 psi | 53% | 2572 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 49,603 psi | 80% | 2871 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 42,032 psi | 67% | 2710 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 96% | 48,269 psi | 77% | 2904 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,692 psi | 83% | 2874 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,716 psi | 73% | 2917 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 48,124 psi | 77% | 2904 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,380 psi | 68% | 2743 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,194 psi | 72% | 2805 fps | 99.1% |
| Alliant Reloder-16 | 45.1 gr | 80% | 32,779 psi | 53% | 2582 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,811 psi | 59% | 2717 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,471 psi | 76% | 2894 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,761 psi | 46% | 2490 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,854 psi | 59% | 2720 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,476 psi | 57% | 2736 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,110 psi | 79% | 2877 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 42,192 psi | 68% | 2746 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 45,556 psi | 73% | 2776 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,127 psi | 85% | 2854 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,169 psi | 82% | 2900 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,801 psi | 69% | 2749 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 42,946 psi | 69% | 2802 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 46,267 psi | 74% | 2825 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 50,111 psi | 80% | 2881 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,240 psi | 48% | 2484 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,572 psi | 75% | 2858 fps | 99.9% |
| Hodgdon Superformance | 56.5 gr | 88% | 45,484 psi | 73% | 2881 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 43% | 1647 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,109 psi | 77% | 2831 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 50,227 psi | 81% | 2867 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,179 psi | 71% | 2746 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,775 psi | 75% | 2776 fps | 96.6% |
| IMR 4350 | <<locked>> | 88% | 43,236 psi | 69% | 2749 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,582 psi | 67% | 2694 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 34,200 psi | 55% | 2589 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 46,325 psi | 74% | 2835 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 51,692 psi | 83% | 2874 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,400 psi | 79% | 2848 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,921 psi | 78% | 2795 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 44,280 psi | 71% | 2749 fps | 99.8% |
| Lovex S065 | <<locked>> | 80% | 36,608 psi | 59% | 2585 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 42,018 psi | 67% | 2726 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 48,559 psi | 78% | 2818 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,182 psi | 79% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,556 psi | 71% | 2792 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 49,066 psi | 79% | 2900 fps | 95.2% |
| Norma MRP | <<locked>> | 96% | 43,830 psi | 70% | 2897 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 33,054 psi | 53% | 2572 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 44,440 psi | 71% | 2808 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 39,247 psi | 63% | 2730 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 51,619 psi | 83% | 2884 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,648 psi | 83% | 2907 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,238 psi | 44% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,105 psi | 69% | 2733 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,298 psi | 77% | 2920 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,160 psi | 63% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,896 psi | 56% | 2644 fps | 95.6% |
| ReloadSwiss RS 70 | 51.8 gr | 84% | 37,014 psi | 59% | 2713 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 52,692 psi | 84% | 2854 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,151 psi | 74% | 2766 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,740 psi | 64% | 2687 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 49,501 psi | 79% | 2933 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 86% | 45,556 psi | 73% | 2776 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,608 psi | 59% | 2585 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,400 psi | 79% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,280 psi | 71% | 2749 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 42,018 psi | 67% | 2726 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,698 psi | 65% | 2740 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,401 psi | 81% | 2864 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,066 psi | 77% | 2835 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,632 psi | 80% | 2759 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,655 psi | 67% | 2621 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,540 psi | 70% | 2697 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 49,023 psi | 79% | 2927 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 49,327 psi | 79% | 2759 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,951 psi | 80% | 2854 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 40,321 psi | 65% | 2690 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 29,747 psi | 48% | 2526 fps | 97.4% |
| Somchem S385 | <<locked>> | 94% | 44,063 psi | 71% | 2799 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 50,082 psi | 80% | 2749 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,151 psi | 74% | 2743 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,485 psi | 75% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,406 psi | 62% | 2621 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 34,432 psi | 55% | 2575 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 51,967 psi | 83% | 2871 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,860 psi | 72% | 2740 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,953 psi | 54% | 2572 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 31,314 psi | 50% | 2569 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,910 psi | 54% | 2549 fps | 97.8% |
| Winchester 748 | <<locked>> | 80% | 52,344 psi | 84% | 2920 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,946 psi | 69% | 2802 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,935 psi | 46% | 2575 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,848 psi | 77% | 2841 fps | 99.9% |
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 97 powders for .270 Win. loaded with the .277 | 130gr | Winchester Powerpoint. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,107 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 1:14.0 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. ReloadSwiss RS 70, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for .270 Win. with the .277 | 130gr | Winchester Powerpoint 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.