Load Specifications
Load data in caliber .270 Win. with .277 | 110gr | Barnes TAC-X 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 Power Pro 2000-MR, ReloadSwiss RS 60 and Alliant Reloder-17.
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>> | 86% | 54,984 psi | 88% | 3077 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,432 psi | 86% | 3097 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,026 psi | 85% | 3087 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,390 psi | 89% | 3159 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 53,069 psi | 85% | 3133 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,982 psi | 85% | 3202 fps | 98.5% |
| ADI AR 2206H | <<locked>> | 88% | 54,201 psi | 87% | 3169 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 94% | 55,579 psi | 89% | 3169 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,403 psi | 86% | 3123 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 53,679 psi | 86% | 3107 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,781 psi | 88% | 3235 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,143 psi | 87% | 3291 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,955 psi | 88% | 3186 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,447 psi | 87% | 3084 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,854 psi | 90% | 3215 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,256 psi | 82% | 3205 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,376 psi | 90% | 3317 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,288 psi | 87% | 3182 fps | 98.8% |
| Bofors RP3 | <<locked>> | 94% | 55,695 psi | 89% | 3205 fps | 99.9% |
| Bofors RP7 | <<locked>> | 98% | 55,941 psi | 90% | 3159 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,376 psi | 89% | 3114 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,434 psi | 90% | 3209 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,360 psi | 87% | 3248 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 53,925 psi | 86% | 3127 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,071 psi | 88% | 3146 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,258 psi | 85% | 3156 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 98% | 52,707 psi | 85% | 3196 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 88% | 54,723 psi | 88% | 3182 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,529 psi | 76% | 3074 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,128 psi | 87% | 3212 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,911 psi | 56% | 1972 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,318 psi | 90% | 3189 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 54,621 psi | 88% | 3176 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,955 psi | 88% | 3153 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,303 psi | 89% | 3127 fps | 96.3% |
| IMR 4198 | <<locked>> | 82% | 54,911 psi | 88% | 3048 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,766 psi | 88% | 3143 fps | 96.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,111 psi | 80% | 3133 fps | 98.1% |
| IMR 4895 | <<locked>> | 90% | 53,780 psi | 86% | 3192 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 86% | 53,403 psi | 86% | 3123 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 53,200 psi | 85% | 3104 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,563 psi | 86% | 3143 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,157 psi | 87% | 3097 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 54,462 psi | 87% | 3146 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 53,809 psi | 86% | 3133 fps | 97.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,578 psi | 88% | 3166 fps | 96.5% |
| Norma 201 | <<locked>> | 88% | 52,692 psi | 84% | 3110 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 53,388 psi | 86% | 3120 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,984 psi | 88% | 3199 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 52,388 psi | 84% | 3192 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 92% | 55,927 psi | 90% | 3228 fps | 99.5% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,300 psi | 82% | 3176 fps | 96.5% |
| Ramshot TAC | <<locked>> | 86% | 53,911 psi | 86% | 3130 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,243 psi | 85% | 3153 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,592 psi | 88% | 3123 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,331 psi | 57% | 2018 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,434 psi | 90% | 3163 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,925 psi | 86% | 3136 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,217 psi | 90% | 3284 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,086 psi | 90% | 3323 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,910 psi | 85% | 3222 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,243 psi | 85% | 3251 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 86% | 53,664 psi | 86% | 3100 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,214 psi | 85% | 3107 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 96% | 55,201 psi | 89% | 3189 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 98% | 55,941 psi | 90% | 3159 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,809 psi | 86% | 3133 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,563 psi | 86% | 3143 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,462 psi | 87% | 3146 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,578 psi | 88% | 3166 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,275 psi | 90% | 3130 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,780 psi | 86% | 3199 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,535 psi | 89% | 3110 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,637 psi | 89% | 3163 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,333 psi | 90% | 3196 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,607 psi | 88% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,795 psi | 88% | 3054 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,331 psi | 87% | 3084 fps | 96.1% |
| Somchem S321 | <<locked>> | 84% | 54,679 psi | 88% | 3159 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,766 psi | 86% | 3054 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,405 psi | 89% | 3159 fps | 99.5% |
| Somchem S355 | <<locked>> | 96% | 55,956 psi | 90% | 3192 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,717 psi | 75% | 3130 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 54,404 psi | 87% | 3028 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,810 psi | 88% | 3048 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 52,852 psi | 85% | 3081 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,041 psi | 87% | 3097 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,795 psi | 86% | 3114 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,085 psi | 88% | 3192 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 86% | 53,809 psi | 86% | 3120 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 55,796 psi | 89% | 3143 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,012 psi | 87% | 3192 fps | 98.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,088 psi | 63% | 2972 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,130 psi | 90% | 3176 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 53,737 psi | 86% | 3173 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,968 psi | 85% | 3199 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,246 psi | 90% | 3202 fps | 99.8% |
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% | 45,484 psi | 73% | 2920 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,835 psi | 80% | 3038 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,463 psi | 60% | 2808 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,962 psi | 72% | 2986 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 35,462 psi | 57% | 2789 fps | 99.1% |
| Accurate 4350 | <<locked>> | 92% | 39,668 psi | 64% | 2936 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 41,814 psi | 67% | 2927 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 37,971 psi | 61% | 2815 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,932 psi | 70% | 2946 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 43,613 psi | 70% | 2946 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,300 psi | 82% | 3176 fps | 99.4% |
| Alliant Power Pro 2000-MR | 49.3 gr | 82% | 40,828 psi | 65% | 3009 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,911 psi | 56% | 2776 fps | 96.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,314 psi | 82% | 3035 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,565 psi | 60% | 2841 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 92% | 39,711 psi | 64% | 2953 fps | 95.4% |
| Alliant Reloder-17 | 49.7 gr | 84% | 34,577 psi | 55% | 2844 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,988 psi | 66% | 2920 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 34,229 psi | 55% | 2769 fps | 96.1% |
| Bofors RP7 | <<locked>> | 96% | 52,460 psi | 84% | 3100 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,759 psi | 73% | 2940 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,656 psi | 68% | 2959 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,108 psi | 76% | 3117 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 50,502 psi | 81% | 3071 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,401 psi | 82% | 3091 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 40,538 psi | 65% | 2900 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 49,327 psi | 79% | 3130 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,163 psi | 68% | 2940 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,084 psi | 55% | 2772 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,145 psi | 61% | 2894 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,860 psi | 41% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,698 psi | 65% | 2890 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 41,597 psi | 67% | 2949 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,304 psi | 60% | 2795 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,692 psi | 83% | 3064 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 51,735 psi | 83% | 2999 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 51,488 psi | 83% | 3084 fps | 95.4% |
| IMR 4831 | <<locked>> | 94% | 41,031 psi | 66% | 2949 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 38,450 psi | 62% | 2877 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 80% | 43,932 psi | 70% | 2946 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 49,588 psi | 80% | 3041 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 40,654 psi | 65% | 2904 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 42,206 psi | 68% | 2871 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 37,014 psi | 59% | 2799 fps | 97.4% |
| Lovex S065 | <<locked>> | 92% | 44,541 psi | 71% | 2959 fps | 95.2% |
| Lovex S070 | <<locked>> | 98% | 51,213 psi | 82% | 3107 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 40,727 psi | 65% | 2877 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 41,220 psi | 66% | 2897 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 36,927 psi | 59% | 2828 fps | 95.9% |
| Norma URP | <<locked>> | 92% | 39,929 psi | 64% | 2940 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 36,651 psi | 59% | 2841 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 98% | 48,138 psi | 77% | 3114 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 43,903 psi | 70% | 2936 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,308 psi | 69% | 2963 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,761 psi | 77% | 3002 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,107 psi | 42% | 1804 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,429 psi | 79% | 3045 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,021 psi | 75% | 3009 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,276 psi | 63% | 2953 fps | 95.9% |
| ReloadSwiss RS 60 | 47.3 gr | 80% | 32,053 psi | 51% | 2785 fps | 96.8% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,395 psi | 68% | 3022 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,120 psi | 69% | 3041 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 44,643 psi | 72% | 2940 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 38,783 psi | 62% | 2822 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 34,330 psi | 55% | 2762 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 96% | 52,460 psi | 84% | 3100 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 44,541 psi | 71% | 2959 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,654 psi | 65% | 2904 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 37,014 psi | 59% | 2799 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 98% | 51,213 psi | 82% | 3107 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,475 psi | 84% | 3068 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 35,868 psi | 58% | 2828 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,301 psi | 84% | 3061 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,003 psi | 67% | 2907 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,495 psi | 65% | 2890 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,540 psi | 68% | 2848 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,128 psi | 56% | 2694 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 50,850 psi | 82% | 3022 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 47,427 psi | 76% | 3031 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 41,858 psi | 67% | 2844 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,713 psi | 67% | 2907 fps | 97.2% |
| Somchem S355 | <<locked>> | 80% | 33,098 psi | 53% | 2717 fps | 95% |
| Somchem S365 | <<locked>> | 88% | 31,154 psi | 50% | 2753 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 48,167 psi | 77% | 2930 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,830 psi | 69% | 2848 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,174 psi | 61% | 2822 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,899 psi | 62% | 2822 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 31,473 psi | 50% | 2651 fps | 96% |
| Vihtavuori N160 | <<locked>> | 90% | 39,334 psi | 63% | 2887 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 43,990 psi | 71% | 2940 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 37,536 psi | 60% | 2802 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 41,205 psi | 66% | 2946 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 98% | 36,564 psi | 59% | 2907 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,606 psi | 55% | 2743 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 43,424 psi | 70% | 2986 fps | 99.3% |
| Winchester 760 | <<locked>> | 96% | 49,327 psi | 79% | 3130 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,885 psi | 64% | 2894 fps | 97.4% |
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 107 powders for .270 Win. loaded with the .277 | 110gr | Barnes TAC-X. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,323 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,323 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 110.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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, Alliant Reloder-17 rank at the top here: for .270 Win. with the .277 | 110gr | Barnes TAC-X they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, Alliant Reloder-26 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.