Load Specifications
Load data in caliber .270 Win. with .277 | 130gr | Hornady CX bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 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 2015 | <<locked>> | 82% | 53,200 psi | 85% | 2808 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,259 psi | 89% | 2877 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,592 psi | 86% | 2897 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,853 psi | 88% | 2887 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,569 psi | 68% | 2766 fps | 96.3% |
| Accurate 4064 | <<locked>> | 90% | 55,535 psi | 89% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,724 psi | 89% | 3018 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 86% | 56,130 psi | 90% | 2966 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 53,708 psi | 86% | 2913 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,056 psi | 88% | 2913 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,840 psi | 90% | 2884 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,043 psi | 90% | 3091 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 53,592 psi | 86% | 2933 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,360 psi | 87% | 2959 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 53,432 psi | 86% | 3022 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,868 psi | 88% | 3061 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,828 psi | 65% | 2802 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,021 psi | 74% | 2976 fps | 98.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,869 psi | 90% | 2979 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 54,288 psi | 87% | 2949 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,360 psi | 87% | 2920 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 53,229 psi | 85% | 2844 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,491 psi | 87% | 2943 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,129 psi | 88% | 2963 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 96% | 55,056 psi | 88% | 3015 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 94% | 55,651 psi | 89% | 2979 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 53,214 psi | 85% | 2923 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,534 psi | 86% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,347 psi | 90% | 3009 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,941 psi | 90% | 3058 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,462 psi | 57% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,346 psi | 87% | 2923 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 53,156 psi | 85% | 2907 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 53,040 psi | 85% | 2894 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,376 psi | 90% | 2927 fps | 98.1% |
| IMR 4350 | <<locked>> | 98% | 55,013 psi | 88% | 2949 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,260 psi | 90% | 2953 fps | 98% |
| IMR 4831 | <<locked>> | 98% | 52,837 psi | 85% | 2956 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 55,782 psi | 89% | 2989 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,056 psi | 88% | 2913 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,854 psi | 90% | 2940 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,477 psi | 89% | 2890 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,289 psi | 90% | 2940 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,637 psi | 89% | 2946 fps | 99% |
| Lovex S070 | <<locked>> | 96% | 53,287 psi | 85% | 2927 fps | 97.8% |
| Norma 201 | <<locked>> | 86% | 54,433 psi | 87% | 2904 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,288 psi | 89% | 2910 fps | 100% |
| Norma 203B | <<locked>> | 88% | 53,577 psi | 86% | 2943 fps | 99.9% |
| Norma 204 | <<locked>> | 98% | 55,608 psi | 89% | 2999 fps | 96.3% |
| Norma URP | <<locked>> | 98% | 55,056 psi | 88% | 3009 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 88% | 54,114 psi | 87% | 2969 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 53,780 psi | 86% | 3002 fps | 98.6% |
| Ramshot TAC | <<locked>> | 84% | 55,274 psi | 89% | 2933 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,882 psi | 88% | 2949 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,738 psi | 89% | 2913 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 58% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,419 psi | 89% | 2946 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,868 psi | 88% | 3025 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,418 psi | 87% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,738 psi | 89% | 3041 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,390 psi | 89% | 3077 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 55,114 psi | 88% | 2884 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,998 psi | 88% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,099 psi | 87% | 2940 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 54,360 psi | 87% | 2920 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,637 psi | 89% | 2946 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,854 psi | 90% | 2940 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,289 psi | 90% | 2940 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 53,287 psi | 85% | 2927 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,159 psi | 90% | 3005 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,519 psi | 86% | 2907 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,476 psi | 87% | 2936 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,086 psi | 90% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,214 psi | 85% | 2799 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,144 psi | 90% | 2900 fps | 98.1% |
| Somchem S321 | <<locked>> | 82% | 56,202 psi | 90% | 2946 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,332 psi | 89% | 2838 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 53,417 psi | 86% | 2904 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 54,607 psi | 88% | 2940 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,895 psi | 85% | 3005 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,921 psi | 78% | 2877 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 82% | 55,666 psi | 89% | 2805 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 52,910 psi | 85% | 2782 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,911 psi | 88% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,767 psi | 89% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,057 psi | 90% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,679 psi | 86% | 2946 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 55,535 psi | 89% | 2913 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,983 psi | 87% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,405 psi | 90% | 3005 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,049 psi | 72% | 2881 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,215 psi | 87% | 2930 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,550 psi | 89% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,405 psi | 89% | 3022 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,303 psi | 58% | 2802 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,317 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% | 49,777 psi | 80% | 2759 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,279 psi | 68% | 2677 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,864 psi | 80% | 2838 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 47,979 psi | 77% | 2769 fps | 95.6% |
| Accurate 3100 | <<locked>> | 98% | 39,639 psi | 64% | 2707 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 40,001 psi | 64% | 2671 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 34,069 psi | 55% | 2602 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 46,282 psi | 74% | 2799 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 39,291 psi | 63% | 2644 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,457 psi | 78% | 2808 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,907 psi | 78% | 2789 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,177 psi | 68% | 2831 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,812 psi | 62% | 2661 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,887 psi | 67% | 2733 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,142 psi | 55% | 2615 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,605 psi | 54% | 2628 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,602 psi | 47% | 2510 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,811 psi | 59% | 2766 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,600 psi | 73% | 2805 fps | 98.6% |
| Bofors RP3 | <<locked>> | 80% | 38,421 psi | 62% | 2664 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 45,005 psi | 72% | 2753 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,966 psi | 80% | 2795 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,282 psi | 76% | 2828 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,363 psi | 63% | 2671 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 88% | 41,989 psi | 67% | 2776 fps | 95% |
| Hodgdon H4350 | <<locked>> | 90% | 48,907 psi | 78% | 2864 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 46,717 psi | 75% | 2812 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 29,414 psi | 47% | 2454 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,757 psi | 69% | 2779 fps | 99.5% |
| Hodgdon Superformance | 54.8 gr | 90% | 44,759 psi | 72% | 2854 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 42% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,744 psi | 72% | 2759 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 46,586 psi | 75% | 2802 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,278 psi | 66% | 2680 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,729 psi | 70% | 2703 fps | 95.4% |
| IMR 4350 | <<locked>> | 92% | 45,382 psi | 73% | 2782 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,932 psi | 70% | 2733 fps | 95.3% |
| IMR 4831 | <<locked>> | 84% | 33,083 psi | 53% | 2559 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 42,931 psi | 69% | 2766 fps | 99% |
| IMR 8208 XBR | <<locked>> | 80% | 48,457 psi | 78% | 2808 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,469 psi | 73% | 2776 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,151 psi | 74% | 2736 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 41,147 psi | 66% | 2680 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 38,290 psi | 61% | 2621 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 43,918 psi | 70% | 2759 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 45,020 psi | 72% | 2746 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 45,455 psi | 73% | 2753 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,263 psi | 66% | 2720 fps | 98.7% |
| Norma 204 | <<locked>> | 96% | 52,025 psi | 83% | 2940 fps | 95.5% |
| Norma URP | <<locked>> | 84% | 34,476 psi | 55% | 2605 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 40,872 psi | 66% | 2730 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 41,176 psi | 66% | 2766 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 48,283 psi | 77% | 2815 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,037 psi | 77% | 2838 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,083 psi | 84% | 2858 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,716 psi | 43% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,670 psi | 68% | 2713 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,396 psi | 71% | 2841 fps | 98.8% |
| ReloadSwiss RS 60 | 46.1 gr | 80% | 35,824 psi | 57% | 2697 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,332 psi | 58% | 2677 fps | 95.8% |
| ReloadSwiss RS 70 | 51.5 gr | 88% | 38,899 psi | 62% | 2749 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 49,023 psi | 79% | 2789 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,859 psi | 69% | 2697 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 36,216 psi | 58% | 2608 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 45,005 psi | 72% | 2753 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,290 psi | 61% | 2621 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,469 psi | 73% | 2776 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,147 psi | 66% | 2680 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 43,918 psi | 70% | 2759 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,420 psi | 60% | 2661 fps | 97.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,688 psi | 75% | 2792 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,744 psi | 72% | 2766 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,528 psi | 75% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,783 psi | 62% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,033 psi | 69% | 2674 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 52,431 psi | 84% | 2887 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,006 psi | 74% | 2697 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,412 psi | 74% | 2785 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 36,999 psi | 59% | 2615 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 26,774 psi | 43% | 2428 fps | 95.5% |
| Somchem S385 | <<locked>> | 98% | 45,759 psi | 73% | 2822 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 52,489 psi | 84% | 2762 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,963 psi | 75% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,641 psi | 68% | 2677 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,192 psi | 69% | 2687 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,288 psi | 57% | 2549 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 84% | 36,042 psi | 58% | 2612 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 48,370 psi | 78% | 2802 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,524 psi | 67% | 2674 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 35,447 psi | 57% | 2608 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 90% | 31,966 psi | 51% | 2589 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,212 psi | 50% | 2470 fps | 96.3% |
| Winchester 748 | <<locked>> | 80% | 48,399 psi | 78% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 42,235 psi | 68% | 2779 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,675 psi | 48% | 2592 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,179 psi | 71% | 2769 fps | 99.5% |
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 96 powders for .270 Win. loaded with the .277 | 130gr | Hornady CX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,091 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,091 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 130.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, ReloadSwiss RS 60, Hodgdon Superformance rank at the top here: for .270 Win. with the .277 | 130gr | Hornady CX 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.