Load Specifications
Load data in caliber .270 Win. with .277 | 120gr | CutEdge MTH bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, 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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 84% | 54,694 psi | 88% | 2949 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 52,982 psi | 85% | 2963 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,230 psi | 89% | 3038 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,750 psi | 85% | 2956 fps | 95.9% |
| Accurate 4064 | <<locked>> | 90% | 53,113 psi | 85% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,982 psi | 85% | 3087 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 86% | 53,838 psi | 86% | 3045 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 92% | 55,158 psi | 88% | 3048 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,347 psi | 90% | 3051 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,766 psi | 86% | 2979 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,780 psi | 86% | 3166 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,824 psi | 88% | 3064 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,680 psi | 89% | 3094 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,679 psi | 88% | 3156 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,260 psi | 90% | 3199 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,928 psi | 62% | 2858 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,671 psi | 70% | 3025 fps | 97.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,867 psi | 86% | 3058 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 55,405 psi | 89% | 3081 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,608 psi | 89% | 3045 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,723 psi | 88% | 2982 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,014 psi | 90% | 3081 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,070 psi | 87% | 3123 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 90% | 53,098 psi | 85% | 3038 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 96% | 52,591 psi | 84% | 3084 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 86% | 54,360 psi | 87% | 3058 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,734 psi | 81% | 3018 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,867 psi | 86% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,534 psi | 86% | 3120 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,288 psi | 57% | 1893 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,883 psi | 90% | 3061 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,389 psi | 87% | 3045 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,534 psi | 87% | 3031 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,447 psi | 87% | 3002 fps | 97.1% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,275 psi | 90% | 3077 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,404 psi | 87% | 3028 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,867 psi | 86% | 3081 fps | 99.3% |
| IMR 4895 | <<locked>> | 88% | 53,287 psi | 85% | 3064 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 56,347 psi | 90% | 3051 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,391 psi | 90% | 3031 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,519 psi | 86% | 3022 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,476 psi | 86% | 2972 fps | 99.7% |
| Lovex S062 | <<locked>> | 90% | 54,186 psi | 87% | 3025 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,635 psi | 86% | 3022 fps | 98.2% |
| Lovex S070 | <<locked>> | 98% | 54,578 psi | 88% | 3058 fps | 97.4% |
| Norma 201 | <<locked>> | 88% | 55,999 psi | 90% | 3045 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,040 psi | 85% | 2992 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,853 psi | 88% | 3077 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 56,173 psi | 90% | 3140 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 55,695 psi | 89% | 3107 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,969 psi | 88% | 3130 fps | 98.1% |
| Ramshot TAC | <<locked>> | 84% | 53,272 psi | 85% | 3009 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,721 psi | 85% | 3028 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,824 psi | 86% | 2995 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,781 psi | 57% | 1939 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,883 psi | 90% | 3031 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,403 psi | 86% | 3018 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,985 psi | 90% | 3159 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,912 psi | 90% | 3199 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,156 psi | 85% | 3114 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,779 psi | 85% | 3136 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 84% | 53,127 psi | 85% | 2969 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,084 psi | 85% | 2989 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,245 psi | 89% | 3071 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,608 psi | 89% | 3045 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,635 psi | 86% | 3022 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,519 psi | 86% | 3022 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,186 psi | 87% | 3025 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,578 psi | 88% | 3058 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,867 psi | 86% | 3084 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,100 psi | 88% | 3041 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,782 psi | 89% | 3068 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,143 psi | 87% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,534 psi | 87% | 2930 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,693 psi | 86% | 2966 fps | 97% |
| Somchem S321 | <<locked>> | 82% | 54,114 psi | 87% | 3028 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,534 psi | 86% | 2930 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,882 psi | 88% | 3038 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 55,811 psi | 89% | 3074 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,473 psi | 81% | 3084 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 53,882 psi | 86% | 2897 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,418 psi | 87% | 2917 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,159 psi | 90% | 3005 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,722 psi | 86% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,650 psi | 86% | 2995 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,897 psi | 88% | 3077 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 84% | 53,301 psi | 85% | 2995 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,550 psi | 89% | 3018 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,896 psi | 86% | 3077 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,598 psi | 68% | 2940 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,535 psi | 89% | 3058 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,301 psi | 85% | 3045 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,924 psi | 85% | 3087 fps | 97% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,693 psi | 56% | 2838 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,811 psi | 89% | 3077 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% | 48,051 psi | 77% | 2844 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,379 psi | 65% | 2753 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,892 psi | 77% | 2920 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 49,226 psi | 79% | 2894 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 38,203 psi | 61% | 2740 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 37,057 psi | 59% | 2772 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 44,498 psi | 71% | 2874 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 37,608 psi | 60% | 2703 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,659 psi | 75% | 2887 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 46,818 psi | 75% | 2874 fps | 100% |
| Alliant Power Pro 2000-MR | 47.8 gr | 80% | 40,495 psi | 65% | 2894 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,173 psi | 60% | 2726 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,147 psi | 64% | 2799 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 37,376 psi | 60% | 2792 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,010 psi | 51% | 2674 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,140 psi | 52% | 2677 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,753 psi | 61% | 2881 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,830 psi | 70% | 2874 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 36,666 psi | 59% | 2726 fps | 97.8% |
| Bofors RP7 | <<locked>> | 92% | 48,936 psi | 78% | 2930 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,327 psi | 77% | 2877 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,440 psi | 73% | 2904 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,386 psi | 81% | 3061 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 37,608 psi | 60% | 2730 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 92% | 45,876 psi | 74% | 2956 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 44,889 psi | 72% | 2887 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,923 psi | 51% | 2615 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,973 psi | 66% | 2851 fps | 98.8% |
| Hodgdon Superformance | 58.4 gr | 94% | 49,559 psi | 79% | 3048 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,136 psi | 42% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,004 psi | 69% | 2831 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 44,338 psi | 71% | 2881 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,465 psi | 63% | 2743 fps | 97.2% |
| IMR 4166 Enduron | <<locked>> | 84% | 48,051 psi | 77% | 2890 fps | 95.7% |
| IMR 4350 | <<locked>> | 96% | 49,313 psi | 79% | 2959 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 48,066 psi | 77% | 2917 fps | 95.6% |
| IMR 4831 | <<locked>> | 88% | 35,897 psi | 58% | 2726 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 41,133 psi | 66% | 2831 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 46,659 psi | 75% | 2887 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 52,634 psi | 84% | 2972 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,381 psi | 70% | 2848 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 44,367 psi | 71% | 2808 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 39,262 psi | 63% | 2746 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 41,669 psi | 67% | 2795 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 44,817 psi | 72% | 2877 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,337 psi | 69% | 2822 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 43,656 psi | 70% | 2831 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,523 psi | 63% | 2785 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 37,478 psi | 60% | 2776 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,131 psi | 63% | 2795 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 92% | 42,061 psi | 67% | 2884 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 46,630 psi | 75% | 2887 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,977 psi | 74% | 2907 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,357 psi | 81% | 2936 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,440 psi | 42% | 1732 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,141 psi | 84% | 2976 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,729 psi | 70% | 2838 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,235 psi | 68% | 2907 fps | 97.7% |
| ReloadSwiss RS 60 | 47 gr | 80% | 34,171 psi | 55% | 2753 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,043 psi | 59% | 2792 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,059 psi | 64% | 2871 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 47,065 psi | 75% | 2867 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,031 psi | 66% | 2766 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 34,563 psi | 55% | 2667 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 48,936 psi | 78% | 2930 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,669 psi | 67% | 2795 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,381 psi | 70% | 2848 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 39,262 psi | 63% | 2746 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 92% | 44,817 psi | 72% | 2877 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,665 psi | 57% | 2720 fps | 96.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,628 psi | 72% | 2854 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,902 psi | 69% | 2835 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,701 psi | 72% | 2779 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,144 psi | 60% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 47,123 psi | 76% | 2851 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 50,531 psi | 81% | 2969 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,367 psi | 71% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,599 psi | 72% | 2858 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 35,462 psi | 57% | 2677 fps | 97% |
| Somchem S365 | <<locked>> | 84% | 29,124 psi | 47% | 2592 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 50,546 psi | 81% | 2848 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,092 psi | 72% | 2772 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,625 psi | 65% | 2753 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,495 psi | 67% | 2762 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,765 psi | 54% | 2612 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 36,666 psi | 59% | 2723 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 46,499 psi | 75% | 2877 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 39,827 psi | 64% | 2746 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 38,595 psi | 62% | 2782 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 34,664 psi | 56% | 2756 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,111 psi | 51% | 2582 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 46,528 psi | 75% | 2930 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 46,180 psi | 74% | 2966 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,358 psi | 52% | 2759 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,453 psi | 68% | 2841 fps | 98.8% |
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 110 powders for .270 Win. loaded with the .277 | 120gr | CutEdge MTH. Alliant Reloder-17 delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,893 fps to 3,199 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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 Power Pro 2000-MR, ReloadSwiss RS 60, Hodgdon Superformance rank at the top here: for .270 Win. with the .277 | 120gr | CutEdge MTH they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.