Load Specifications
Load data in caliber .270 Win. with .277 | 112gr | Hasler ARIETE bullet and 98 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.
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>> | 86% | 54,998 psi | 88% | 3048 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,534 psi | 86% | 3071 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,171 psi | 85% | 3061 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,535 psi | 89% | 3136 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 53,200 psi | 85% | 3107 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,359 psi | 86% | 3182 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 88% | 54,607 psi | 88% | 3150 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 94% | 55,724 psi | 89% | 3146 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,461 psi | 86% | 3097 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 54,056 psi | 87% | 3084 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,143 psi | 88% | 3215 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,070 psi | 87% | 3261 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,143 psi | 88% | 3163 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,708 psi | 88% | 3058 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,028 psi | 90% | 3189 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,532 psi | 83% | 3186 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,434 psi | 90% | 3294 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,289 psi | 58% | 2864 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,462 psi | 87% | 3156 fps | 98.9% |
| Bofors RP3 | <<locked>> | 94% | 55,956 psi | 90% | 3182 fps | 99.9% |
| Bofors RP7 | <<locked>> | 98% | 56,202 psi | 90% | 3140 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,419 psi | 89% | 3084 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 52,823 psi | 85% | 3123 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,882 psi | 88% | 3232 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 82% | 54,273 psi | 87% | 3104 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,172 psi | 88% | 3123 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,403 psi | 86% | 3130 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 98% | 53,011 psi | 85% | 3176 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 88% | 55,129 psi | 88% | 3163 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,485 psi | 76% | 3051 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,360 psi | 87% | 3189 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,896 psi | 56% | 1949 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 52,968 psi | 85% | 3107 fps | 99.6% |
| IMR 3031 | <<locked>> | 88% | 54,708 psi | 88% | 3150 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,114 psi | 88% | 3127 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,434 psi | 89% | 3100 fps | 96.5% |
| IMR 4198 | <<locked>> | 82% | 55,071 psi | 88% | 3022 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,969 psi | 88% | 3120 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,386 psi | 81% | 3110 fps | 98.3% |
| IMR 4895 | <<locked>> | 90% | 53,911 psi | 86% | 3166 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 86% | 53,461 psi | 86% | 3097 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 53,330 psi | 86% | 3077 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,751 psi | 86% | 3120 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,230 psi | 87% | 3071 fps | 99.5% |
| Lovex S062 | <<locked>> | 92% | 54,563 psi | 87% | 3120 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 53,722 psi | 86% | 3107 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,563 psi | 87% | 3140 fps | 96.6% |
| Norma 201 | <<locked>> | 88% | 53,055 psi | 85% | 3087 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 53,795 psi | 86% | 3097 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,158 psi | 88% | 3173 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 52,330 psi | 84% | 3163 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 92% | 55,840 psi | 90% | 3199 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,648 psi | 83% | 3156 fps | 96.8% |
| Ramshot TAC | <<locked>> | 86% | 54,070 psi | 87% | 3107 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,403 psi | 86% | 3130 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,694 psi | 88% | 3097 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,317 psi | 57% | 1995 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,011 psi | 85% | 3081 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,114 psi | 87% | 3114 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,794 psi | 85% | 3199 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,072 psi | 90% | 3297 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,953 psi | 85% | 3196 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,374 psi | 86% | 3228 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 86% | 53,650 psi | 86% | 3074 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,606 psi | 86% | 3087 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 55,463 psi | 89% | 3166 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 98% | 56,202 psi | 90% | 3140 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,722 psi | 86% | 3107 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,751 psi | 86% | 3120 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,563 psi | 87% | 3120 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,563 psi | 87% | 3140 fps | 96.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,362 psi | 90% | 3104 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,070 psi | 87% | 3179 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,753 psi | 89% | 3084 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,854 psi | 90% | 3140 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,098 psi | 85% | 3114 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,955 psi | 88% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,230 psi | 89% | 3031 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,578 psi | 88% | 3061 fps | 96.3% |
| Somchem S321 | <<locked>> | 84% | 54,868 psi | 88% | 3133 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,114 psi | 87% | 3031 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,608 psi | 89% | 3133 fps | 99.5% |
| Somchem S355 | <<locked>> | 96% | 56,144 psi | 90% | 3169 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,021 psi | 75% | 3114 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 84% | 54,665 psi | 88% | 3005 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,143 psi | 88% | 3025 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 52,895 psi | 85% | 3054 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,201 psi | 87% | 3071 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,027 psi | 87% | 3091 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,419 psi | 89% | 3173 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 86% | 54,201 psi | 87% | 3100 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 55,999 psi | 90% | 3117 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,317 psi | 87% | 3173 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,378 psi | 63% | 2953 fps | 96.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,217 psi | 90% | 3153 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 53,882 psi | 86% | 3150 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,011 psi | 85% | 3176 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,663 psi | 84% | 3117 fps | 99.6% |
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% | 45,411 psi | 73% | 2894 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,850 psi | 80% | 3012 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,695 psi | 60% | 2789 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,034 psi | 72% | 2959 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 35,694 psi | 57% | 2769 fps | 99.3% |
| Accurate 4350 | <<locked>> | 92% | 39,842 psi | 64% | 2917 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 42,061 psi | 67% | 2907 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 38,174 psi | 61% | 2799 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,150 psi | 71% | 2923 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 43,845 psi | 70% | 2923 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,590 psi | 83% | 3150 fps | 99.5% |
| Alliant Power Pro 2000-MR | 47.6 gr | 80% | 38,116 psi | 61% | 2913 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,128 psi | 56% | 2759 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,517 psi | 83% | 3009 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,768 psi | 61% | 2825 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 39,827 psi | 64% | 2933 fps | 95.6% |
| Alliant Reloder-17 | 49.2 gr | 84% | 34,650 psi | 56% | 2825 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,011 psi | 55% | 2799 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,321 psi | 66% | 2904 fps | 96.2% |
| Bofors RP3 | <<locked>> | 80% | 34,461 psi | 55% | 2749 fps | 96.3% |
| Bofors RP7 | <<locked>> | 96% | 52,663 psi | 84% | 3077 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,992 psi | 74% | 2920 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,743 psi | 69% | 2936 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,224 psi | 76% | 3091 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 80% | 50,488 psi | 81% | 3041 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,474 psi | 83% | 3064 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 40,582 psi | 65% | 2877 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 96% | 49,313 psi | 79% | 3107 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 42,409 psi | 68% | 2920 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,171 psi | 55% | 2753 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,406 psi | 62% | 2877 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,991 psi | 42% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,683 psi | 65% | 2864 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 41,800 psi | 67% | 2927 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,492 psi | 60% | 2776 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,793 psi | 83% | 3038 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 51,851 psi | 83% | 2972 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 51,648 psi | 83% | 3064 fps | 95.6% |
| IMR 4831 | <<locked>> | 92% | 38,537 psi | 62% | 2871 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 38,696 psi | 62% | 2858 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 80% | 44,150 psi | 71% | 2923 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 49,676 psi | 80% | 3015 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 40,640 psi | 65% | 2881 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 42,409 psi | 68% | 2848 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 37,217 psi | 60% | 2782 fps | 97.5% |
| Lovex S065 | <<locked>> | 92% | 44,643 psi | 72% | 2936 fps | 95.4% |
| Lovex S070 | <<locked>> | 96% | 48,008 psi | 77% | 3022 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,959 psi | 66% | 2854 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 41,423 psi | 66% | 2874 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 37,159 psi | 60% | 2812 fps | 96.1% |
| Norma URP | <<locked>> | 92% | 40,059 psi | 64% | 2917 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 36,724 psi | 59% | 2818 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 96% | 45,165 psi | 72% | 3028 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 44,193 psi | 71% | 2920 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,381 psi | 70% | 2936 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,819 psi | 77% | 2976 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,020 psi | 42% | 1781 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,734 psi | 80% | 3025 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,166 psi | 76% | 2986 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,334 psi | 63% | 2930 fps | 96.1% |
| ReloadSwiss RS 60 | 46.9 gr | 80% | 32,271 psi | 52% | 2769 fps | 97.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 39,653 psi | 64% | 2933 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,105 psi | 69% | 3018 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 44,802 psi | 72% | 2917 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 38,957 psi | 62% | 2802 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 32,271 psi | 52% | 2684 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 96% | 52,663 psi | 84% | 3077 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 44,643 psi | 72% | 2936 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,640 psi | 65% | 2881 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 37,217 psi | 60% | 2782 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 96% | 48,008 psi | 77% | 3022 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,533 psi | 84% | 3045 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 35,911 psi | 58% | 2805 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,518 psi | 84% | 3035 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,105 psi | 68% | 2881 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,495 psi | 65% | 2867 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,656 psi | 68% | 2825 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,273 psi | 57% | 2671 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 50,792 psi | 81% | 2995 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 47,790 psi | 77% | 3012 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 42,061 psi | 67% | 2822 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,061 psi | 67% | 2887 fps | 97.4% |
| Somchem S355 | <<locked>> | 80% | 33,272 psi | 53% | 2700 fps | 95.2% |
| Somchem S365 | <<locked>> | 88% | 31,241 psi | 50% | 2733 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 48,341 psi | 78% | 2907 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,018 psi | 69% | 2828 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,348 psi | 61% | 2799 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,117 psi | 63% | 2802 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 31,662 psi | 51% | 2635 fps | 96.3% |
| Vihtavuori N160 | <<locked>> | 90% | 39,450 psi | 63% | 2867 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,237 psi | 71% | 2920 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 37,753 psi | 61% | 2785 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 41,394 psi | 66% | 2923 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 98% | 36,738 psi | 59% | 2890 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,722 psi | 56% | 2723 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 43,714 psi | 70% | 2963 fps | 99.4% |
| Winchester 760 | <<locked>> | 96% | 49,632 psi | 80% | 3114 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,958 psi | 64% | 2871 fps | 97.6% |
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 109 powders for .270 Win. loaded with the .277 | 112gr | Hasler ARIETE. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,297 fps; across all powders the maximum-charge window runs from 1,949 fps to 3,297 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 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 112.0 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 | 112gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-19, 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.