Load Specifications
Load data in caliber .270 Win. with .277 | 115gr | CutEdge LZR 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 60, Alliant Reloder-17 and Alliant Power Pro 2000-MR.
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% | 55,622 psi | 89% | 3018 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,911 psi | 86% | 3035 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,606 psi | 86% | 3028 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,043 psi | 90% | 3104 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 53,432 psi | 86% | 3071 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,795 psi | 86% | 3153 fps | 98.8% |
| ADI AR 2206H | <<locked>> | 88% | 54,708 psi | 88% | 3110 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 94% | 55,898 psi | 90% | 3110 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,809 psi | 86% | 3061 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 54,404 psi | 87% | 3048 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,463 psi | 89% | 3179 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,694 psi | 88% | 3232 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,651 psi | 89% | 3133 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,201 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,217 psi | 90% | 3153 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,808 psi | 83% | 3153 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,881 psi | 85% | 3196 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,753 psi | 59% | 2844 fps | 96.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,723 psi | 88% | 3123 fps | 99% |
| Bofors RP3 | <<locked>> | 94% | 56,231 psi | 90% | 3146 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,753 psi | 89% | 3051 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,026 psi | 85% | 3087 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,100 psi | 88% | 3196 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 82% | 54,549 psi | 87% | 3068 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,564 psi | 89% | 3087 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,679 psi | 86% | 3100 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 98% | 53,432 psi | 86% | 3146 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 88% | 55,216 psi | 89% | 3123 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,080 psi | 77% | 3025 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,911 psi | 88% | 3159 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 98% | 54,389 psi | 87% | 3179 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,027 psi | 56% | 1923 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,374 psi | 86% | 3074 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 55,100 psi | 88% | 3114 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,521 psi | 89% | 3094 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,579 psi | 89% | 3068 fps | 96.7% |
| IMR 4198 | <<locked>> | 82% | 55,477 psi | 89% | 2986 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,158 psi | 88% | 3087 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,763 psi | 81% | 3081 fps | 98.5% |
| IMR 4895 | <<locked>> | 90% | 54,070 psi | 87% | 3130 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 86% | 53,809 psi | 86% | 3061 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 53,708 psi | 86% | 3045 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,273 psi | 87% | 3087 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,549 psi | 87% | 3038 fps | 99.6% |
| Lovex S062 | <<locked>> | 92% | 55,056 psi | 88% | 3091 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,273 psi | 87% | 3081 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,245 psi | 89% | 3114 fps | 96.9% |
| Norma 201 | <<locked>> | 88% | 53,417 psi | 86% | 3054 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 53,838 psi | 86% | 3058 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,376 psi | 89% | 3140 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 53,040 psi | 85% | 3140 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 90% | 52,649 psi | 84% | 3110 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,069 psi | 83% | 3127 fps | 97.1% |
| Ramshot TAC | <<locked>> | 86% | 54,230 psi | 87% | 3074 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,882 psi | 86% | 3097 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,114 psi | 88% | 3068 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,244 psi | 57% | 1962 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,316 psi | 85% | 3045 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,389 psi | 87% | 3081 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,026 psi | 85% | 3166 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,852 psi | 85% | 3205 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,534 psi | 86% | 3169 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,867 psi | 86% | 3202 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 86% | 54,244 psi | 87% | 3041 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,954 psi | 87% | 3054 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 56,072 psi | 90% | 3136 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,273 psi | 87% | 3081 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,273 psi | 87% | 3087 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,056 psi | 88% | 3091 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,245 psi | 89% | 3114 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,375 psi | 87% | 3146 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,289 psi | 90% | 3051 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,405 psi | 90% | 3110 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,272 psi | 85% | 3077 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,230 psi | 89% | 3002 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,332 psi | 89% | 2995 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,940 psi | 88% | 3031 fps | 96.6% |
| Somchem S321 | <<locked>> | 84% | 55,317 psi | 89% | 3100 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,462 psi | 87% | 2999 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,854 psi | 90% | 3104 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 56,405 psi | 90% | 3136 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,384 psi | 76% | 3084 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 54,897 psi | 88% | 2966 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,419 psi | 89% | 2989 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,272 psi | 85% | 3022 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,607 psi | 88% | 3038 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,607 psi | 88% | 3061 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,825 psi | 90% | 3143 fps | 99% |
| Vihtavuori N530 | <<locked>> | 86% | 54,592 psi | 88% | 3068 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,202 psi | 90% | 3084 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,766 psi | 88% | 3143 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,682 psi | 64% | 2927 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,910 psi | 85% | 3064 fps | 99.8% |
| Winchester 748 | <<locked>> | 86% | 54,360 psi | 87% | 3117 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,432 psi | 86% | 3146 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,200 psi | 85% | 3087 fps | 99.7% |
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% | 45,847 psi | 74% | 2864 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,198 psi | 80% | 2979 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,145 psi | 61% | 2762 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,353 psi | 73% | 2927 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 36,114 psi | 58% | 2746 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 40,059 psi | 64% | 2890 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 42,235 psi | 68% | 2874 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,882 psi | 58% | 2707 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,353 psi | 71% | 2890 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 44,338 psi | 71% | 2890 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,851 psi | 83% | 3117 fps | 99.6% |
| Alliant Power Pro 2000-MR | 47 gr | 80% | 38,377 psi | 62% | 2887 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,259 psi | 57% | 2730 fps | 96.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,648 psi | 83% | 2969 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,971 psi | 61% | 2795 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,652 psi | 60% | 2844 fps | 95.1% |
| Alliant Reloder-17 | 48.6 gr | 84% | 34,954 psi | 56% | 2802 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,418 psi | 55% | 2782 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,626 psi | 67% | 2874 fps | 96.5% |
| Bofors RP3 | <<locked>> | 80% | 34,679 psi | 56% | 2723 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,398 psi | 74% | 2890 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,062 psi | 69% | 2907 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,645 psi | 76% | 3061 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 80% | 51,024 psi | 82% | 3012 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,808 psi | 83% | 3028 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 40,915 psi | 66% | 2851 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 96% | 49,647 psi | 80% | 3077 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 42,598 psi | 68% | 2887 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,401 psi | 52% | 2674 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,682 psi | 62% | 2848 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 96% | 50,517 psi | 81% | 3107 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 42% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,118 psi | 66% | 2841 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 41,989 psi | 67% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,652 psi | 60% | 2746 fps | 96% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,965 psi | 79% | 2949 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 52,199 psi | 84% | 2936 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,617 psi | 78% | 2969 fps | 95% |
| IMR 4831 | <<locked>> | 92% | 38,725 psi | 62% | 2841 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 38,928 psi | 62% | 2828 fps | 97% |
| IMR 8208 XBR | <<locked>> | 80% | 44,353 psi | 71% | 2890 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 50,024 psi | 80% | 2986 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,191 psi | 66% | 2854 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 42,525 psi | 68% | 2815 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 37,376 psi | 60% | 2749 fps | 97.8% |
| Lovex S065 | <<locked>> | 92% | 44,788 psi | 72% | 2904 fps | 95.7% |
| Lovex S070 | <<locked>> | 96% | 48,515 psi | 78% | 2995 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,365 psi | 66% | 2828 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 41,626 psi | 67% | 2841 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 37,347 psi | 60% | 2782 fps | 96.4% |
| Norma URP | <<locked>> | 90% | 37,840 psi | 61% | 2831 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,999 psi | 59% | 2792 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 96% | 45,455 psi | 73% | 3002 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 44,498 psi | 71% | 2890 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,685 psi | 70% | 2910 fps | 98% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,109 psi | 77% | 2946 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,281 psi | 42% | 1762 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,966 psi | 80% | 2989 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,601 psi | 76% | 2959 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,900 psi | 64% | 2907 fps | 96.5% |
| ReloadSwiss RS 60 | 46.3 gr | 80% | 32,518 psi | 52% | 2746 fps | 97.5% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,190 psi | 64% | 2913 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,410 psi | 70% | 2992 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 44,947 psi | 72% | 2881 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,117 psi | 63% | 2772 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 80% | 32,460 psi | 52% | 2657 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 44,788 psi | 72% | 2904 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,191 psi | 66% | 2854 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 37,376 psi | 60% | 2749 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 96% | 48,515 psi | 78% | 2995 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,201 psi | 58% | 2779 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,663 psi | 84% | 2995 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,409 psi | 68% | 2854 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,973 psi | 66% | 2841 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,801 psi | 69% | 2792 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,389 psi | 57% | 2641 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,008 psi | 77% | 2913 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 48,095 psi | 77% | 2979 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 42,467 psi | 68% | 2792 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,380 psi | 68% | 2858 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 33,634 psi | 54% | 2677 fps | 95.7% |
| Somchem S365 | <<locked>> | 86% | 29,486 psi | 47% | 2648 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 48,443 psi | 78% | 2867 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,134 psi | 69% | 2792 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,522 psi | 62% | 2766 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,276 psi | 63% | 2769 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 31,836 psi | 51% | 2608 fps | 96.6% |
| Vihtavuori N160 | <<locked>> | 90% | 39,595 psi | 63% | 2838 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 44,469 psi | 71% | 2890 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 80% | 37,956 psi | 61% | 2753 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 90% | 38,972 psi | 62% | 2835 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 98% | 37,028 psi | 59% | 2864 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,721 psi | 52% | 2638 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 44,048 psi | 71% | 2933 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 49,966 psi | 80% | 3084 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,234 psi | 65% | 2841 fps | 97.8% |
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 | 115gr | CutEdge LZR. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,232 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,232 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 115.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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-17, Alliant Power Pro 2000-MR rank at the top here: for .270 Win. with the .277 | 115gr | CutEdge LZR 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.