Load Specifications
Load data in caliber .270 Win. with .277 | 122gr | Hasler ARIETE bullet and 96 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, Hodgdon Superformance and ReloadSwiss RS 60.
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>> | 84% | 53,940 psi | 86% | 2907 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,028 psi | 90% | 2986 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,680 psi | 89% | 2972 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,360 psi | 87% | 2995 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,883 psi | 90% | 2976 fps | 96.5% |
| Accurate 4064 | <<locked>> | 92% | 55,811 psi | 89% | 3022 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 56,304 psi | 90% | 3110 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 53,258 psi | 85% | 3005 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 92% | 54,389 psi | 87% | 3005 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,767 psi | 89% | 3012 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 52,895 psi | 85% | 2936 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,113 psi | 85% | 3123 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,360 psi | 87% | 3028 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,853 psi | 88% | 3048 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,143 psi | 87% | 3114 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,492 psi | 89% | 3156 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,290 psi | 61% | 2818 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,917 psi | 69% | 2979 fps | 97% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,171 psi | 85% | 3018 fps | 99.2% |
| Bofors RP3 | <<locked>> | 92% | 54,940 psi | 88% | 3045 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,984 psi | 88% | 3009 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,070 psi | 87% | 2943 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,274 psi | 89% | 3041 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,563 psi | 86% | 3084 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 92% | 55,999 psi | 90% | 3054 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 98% | 55,637 psi | 89% | 3104 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 86% | 53,780 psi | 86% | 3015 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,140 psi | 80% | 2982 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,417 psi | 86% | 3051 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 52,678 psi | 84% | 3077 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,317 psi | 57% | 1870 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,390 psi | 89% | 3025 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 53,606 psi | 86% | 3002 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,998 psi | 87% | 2992 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,012 psi | 87% | 2966 fps | 97% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,492 psi | 89% | 3035 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,766 psi | 86% | 2989 fps | 96.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 3041 fps | 99.2% |
| IMR 4895 | <<locked>> | 90% | 56,260 psi | 90% | 3081 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 55,767 psi | 89% | 3012 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,869 psi | 90% | 2992 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 52,953 psi | 85% | 2982 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,362 psi | 90% | 2989 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 53,635 psi | 86% | 2986 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 56,217 psi | 90% | 3031 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 53,722 psi | 86% | 3012 fps | 97.3% |
| Norma 201 | <<locked>> | 88% | 55,405 psi | 89% | 3005 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,927 psi | 90% | 3005 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,027 psi | 87% | 3035 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 55,303 psi | 89% | 3094 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 90% | 54,766 psi | 88% | 3061 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,273 psi | 87% | 3091 fps | 98% |
| Ramshot TAC | <<locked>> | 86% | 56,260 psi | 90% | 3028 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,043 psi | 90% | 3051 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,359 psi | 86% | 2956 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,578 psi | 57% | 1909 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,216 psi | 89% | 2989 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,260 psi | 90% | 3035 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,463 psi | 89% | 3120 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,998 psi | 88% | 3156 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,086 psi | 90% | 3133 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,101 psi | 90% | 3163 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 86% | 56,159 psi | 90% | 2986 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,680 psi | 89% | 2999 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,476 psi | 87% | 3031 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,984 psi | 88% | 3009 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 56,217 psi | 90% | 3031 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 52,953 psi | 85% | 2982 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,635 psi | 86% | 2986 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,722 psi | 86% | 3012 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,243 psi | 85% | 3045 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,723 psi | 88% | 3005 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,332 psi | 89% | 3031 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,751 psi | 86% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,012 psi | 87% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,171 psi | 85% | 2930 fps | 96.9% |
| Somchem S321 | <<locked>> | 82% | 53,577 psi | 86% | 2992 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,391 psi | 90% | 2940 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,244 psi | 87% | 2995 fps | 99.7% |
| Somchem S355 | <<locked>> | 94% | 55,071 psi | 88% | 3031 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,603 psi | 80% | 3041 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 53,403 psi | 86% | 2861 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,070 psi | 87% | 2884 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,463 psi | 89% | 2966 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,171 psi | 85% | 2936 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 52,968 psi | 85% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,360 psi | 87% | 3038 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 86% | 56,304 psi | 90% | 3012 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,882 psi | 88% | 2979 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,417 psi | 86% | 3041 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,771 psi | 67% | 2897 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,955 psi | 88% | 3018 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 56,333 psi | 90% | 3061 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,999 psi | 90% | 3110 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,243 psi | 55% | 2795 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,143 psi | 88% | 3038 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% | 47,500 psi | 76% | 2808 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,170 psi | 84% | 2927 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,871 psi | 64% | 2717 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,297 psi | 76% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 48,849 psi | 78% | 2858 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 37,724 psi | 60% | 2703 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 36,564 psi | 59% | 2736 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 43,816 psi | 70% | 2831 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 37,449 psi | 60% | 2674 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,977 psi | 74% | 2844 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 46,282 psi | 74% | 2838 fps | 100% |
| Alliant Power Pro 2000-MR | 46.7 gr | 80% | 39,987 psi | 64% | 2854 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,767 psi | 59% | 2690 fps | 97.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,523 psi | 63% | 2759 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 36,956 psi | 59% | 2756 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,778 psi | 51% | 2641 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,662 psi | 51% | 2638 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,842 psi | 64% | 2907 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,337 psi | 69% | 2835 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 36,260 psi | 58% | 2690 fps | 97.7% |
| Bofors RP7 | <<locked>> | 92% | 48,588 psi | 78% | 2894 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,906 psi | 77% | 2838 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,889 psi | 72% | 2864 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,821 psi | 80% | 3022 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 37,275 psi | 60% | 2697 fps | 95% |
| Hodgdon H414 | <<locked>> | 92% | 45,281 psi | 73% | 2917 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 44,251 psi | 71% | 2844 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,647 psi | 51% | 2585 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,422 psi | 65% | 2812 fps | 98.7% |
| Hodgdon Superformance | 57.1 gr | 94% | 48,950 psi | 78% | 3009 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,208 psi | 42% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,627 psi | 68% | 2795 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 44,092 psi | 71% | 2848 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,262 psi | 63% | 2710 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 84% | 47,558 psi | 76% | 2851 fps | 95.6% |
| IMR 4350 | <<locked>> | 96% | 48,791 psi | 78% | 2920 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,355 psi | 76% | 2874 fps | 95.4% |
| IMR 4831 | <<locked>> | 88% | 35,447 psi | 57% | 2690 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 40,509 psi | 65% | 2789 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 80% | 45,977 psi | 74% | 2844 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 52,025 psi | 83% | 2936 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,004 psi | 69% | 2812 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 43,932 psi | 70% | 2769 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 38,841 psi | 62% | 2710 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 41,205 psi | 66% | 2756 fps | 95.3% |
| Lovex S070 | <<locked>> | 92% | 44,483 psi | 71% | 2841 fps | 95% |
| Norma 201 | <<locked>> | 80% | 42,902 psi | 69% | 2785 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 43,207 psi | 69% | 2795 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,870 psi | 62% | 2746 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 36,999 psi | 59% | 2740 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 38,653 psi | 62% | 2759 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 44,353 psi | 71% | 2907 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 46,151 psi | 74% | 2851 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,440 psi | 73% | 2867 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,835 psi | 80% | 2900 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,513 psi | 43% | 1709 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,735 psi | 83% | 2936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,279 psi | 69% | 2802 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,829 psi | 67% | 2871 fps | 97.7% |
| ReloadSwiss RS 60 | 46 gr | 80% | 33,910 psi | 54% | 2720 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 39,305 psi | 63% | 2822 fps | 96% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 39,363 psi | 63% | 2828 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 46,514 psi | 75% | 2831 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,828 psi | 65% | 2733 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 34,171 psi | 55% | 2631 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 92% | 48,588 psi | 78% | 2894 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,205 psi | 66% | 2756 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,004 psi | 69% | 2812 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 38,841 psi | 62% | 2710 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 92% | 44,483 psi | 71% | 2841 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,346 psi | 57% | 2687 fps | 96.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,106 psi | 71% | 2815 fps | 96.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,569 psi | 68% | 2802 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,469 psi | 71% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,912 psi | 59% | 2598 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 46,485 psi | 75% | 2812 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 49,980 psi | 80% | 2933 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 43,976 psi | 71% | 2743 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,092 psi | 71% | 2818 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 35,056 psi | 56% | 2641 fps | 96.9% |
| Somchem S365 | <<locked>> | 84% | 28,848 psi | 46% | 2562 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 50,299 psi | 81% | 2815 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,889 psi | 72% | 2743 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,350 psi | 65% | 2720 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,089 psi | 66% | 2730 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,388 psi | 54% | 2575 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 86% | 36,187 psi | 58% | 2687 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 46,122 psi | 74% | 2841 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 39,465 psi | 63% | 2710 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 38,218 psi | 61% | 2746 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 34,084 psi | 55% | 2720 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,792 psi | 51% | 2549 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 45,905 psi | 74% | 2890 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 45,585 psi | 73% | 2923 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,068 psi | 51% | 2726 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,930 psi | 67% | 2802 fps | 98.7% |
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 111 powders for .270 Win. loaded with the .277 | 122gr | Hasler ARIETE. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,163 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 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 122.0 gr projectile in 0.277" calls for a 1:10.0 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. Alliant Power Pro 2000-MR, Hodgdon Superformance, ReloadSwiss RS 60 rank at the top here: for .270 Win. with the .277 | 122gr | Hasler ARIETE 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.