Load Specifications
Load data in caliber .270 WSM with .277 | 140gr | Nosler CT FailSafe bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and Alliant Reloder-26.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 56,927 psi | 89% | 2963 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,839 psi | 86% | 2946 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,942 psi | 89% | 3097 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 94% | 57,711 psi | 90% | 3097 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 57,711 psi | 90% | 2936 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,101 psi | 89% | 3031 fps | 99% |
| ADI AR 2213 | <<locked>> | 94% | 55,158 psi | 86% | 3035 fps | 97.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,024 psi | 78% | 2930 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,034 psi | 71% | 2900 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,682 psi | 90% | 3031 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,682 psi | 90% | 3031 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,305 psi | 90% | 3038 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,100 psi | 86% | 3002 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,014 psi | 89% | 3022 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,419 psi | 87% | 3038 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,420 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 3071 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,855 psi | 89% | 3110 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 54,433 psi | 85% | 3022 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 3012 fps | 97.9% |
| Bofors RP5 | <<locked>> | 94% | 55,419 psi | 87% | 3038 fps | 99% |
| Bofors RP7 | <<locked>> | 84% | 56,231 psi | 88% | 2930 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3012 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 84% | 55,158 psi | 86% | 2982 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 57,566 psi | 90% | 2989 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 92% | 55,056 psi | 86% | 2969 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,653 psi | 90% | 3012 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,752 psi | 86% | 2913 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,404 psi | 85% | 3133 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 84% | 54,984 psi | 86% | 3012 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 59% | 1867 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,217 psi | 90% | 2963 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,043 psi | 89% | 2946 fps | 99.7% |
| IMR 4831 | <<locked>> | 86% | 54,520 psi | 85% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,217 psi | 88% | 2953 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 96% | 56,565 psi | 89% | 3071 fps | 98.2% |
| Lovex S065 | <<locked>> | 84% | 55,100 psi | 86% | 2904 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,840 psi | 89% | 2953 fps | 99.8% |
| Lovex S071 | <<locked>> | 98% | 54,621 psi | 86% | 2927 fps | 99.9% |
| Norma 204 | <<locked>> | 86% | 54,476 psi | 85% | 2959 fps | 98.5% |
| Norma 217ᴾ | <<locked>> | 100% | 41,394 psi | 65% | 2841 fps | 97.3% |
| Norma MRP | <<locked>> | 92% | 55,143 psi | 86% | 3064 fps | 99.7% |
| Norma URP | <<locked>> | 86% | 55,854 psi | 88% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,217 psi | 90% | 3091 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 57,740 psi | 90% | 3025 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,883 psi | 88% | 3028 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,377 psi | 60% | 1909 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,348 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,882 psi | 86% | 3035 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,187 psi | 86% | 3133 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,662 psi | 79% | 3018 fps | 96% |
| Rottweil R 904 | <<locked>> | 90% | 55,288 psi | 87% | 2946 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 92% | 56,753 psi | 89% | 3015 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 84% | 56,231 psi | 88% | 2930 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,100 psi | 86% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,840 psi | 89% | 2953 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,145 psi | 90% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,667 psi | 90% | 2904 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,304 psi | 88% | 3009 fps | 99% |
| Somchem S355 | <<locked>> | 82% | 57,392 psi | 90% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,797 psi | 89% | 2933 fps | 97.4% |
| Somchem S365 | <<locked>> | 88% | 56,057 psi | 88% | 2976 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,653 psi | 90% | 2992 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 55,027 psi | 86% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,334 psi | 90% | 2959 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,637 psi | 89% | 2963 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 86% | 56,753 psi | 89% | 2969 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,333 psi | 88% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,795 psi | 86% | 3048 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 98% | 55,347 psi | 87% | 3035 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,246 psi | 88% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,434 psi | 87% | 2986 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,450 psi | 90% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,956 psi | 89% | 2979 fps | 99% |
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 3100 | <<locked>> | 80% | 37,507 psi | 59% | 2602 fps | 97.4% |
| Accurate 4350 | <<locked>> | 80% | 48,399 psi | 76% | 2838 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 44,324 psi | 69% | 2861 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 88% | 47,688 psi | 75% | 2917 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 54,476 psi | 85% | 2887 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,842 psi | 62% | 2694 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 88% | 45,687 psi | 72% | 2851 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 96% | 44,150 psi | 69% | 2808 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 92% | 35,955 psi | 56% | 2671 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,234 psi | 63% | 2697 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,234 psi | 63% | 2697 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,063 psi | 71% | 2828 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,634 psi | 81% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,943 psi | 63% | 2694 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 84% | 40,901 psi | 64% | 2756 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,070 psi | 55% | 2618 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,154 psi | 49% | 2526 fps | 95.5% |
| Alliant Reloder-26 | 57.1 gr | 80% | 38,159 psi | 60% | 2759 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 40,640 psi | 64% | 2749 fps | 95.6% |
| Bofors RP30 | <<locked>> | 94% | 43,410 psi | 68% | 2841 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 40,901 psi | 64% | 2756 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 50,096 psi | 79% | 2822 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 42,670 psi | 67% | 2779 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 48,863 psi | 77% | 2871 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 51,097 psi | 80% | 2877 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 48,675 psi | 76% | 2854 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 47,776 psi | 75% | 2838 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,279 psi | 68% | 2720 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 38,232 psi | 60% | 2769 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 48,138 psi | 75% | 2894 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 44% | 1670 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,339 psi | 71% | 2753 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,937 psi | 80% | 2841 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 45,788 psi | 72% | 2779 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 47,384 psi | 74% | 2795 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 88% | 44,324 psi | 69% | 2835 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,197 psi | 77% | 2802 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 47,747 psi | 75% | 2795 fps | 98.9% |
| Lovex S071 | <<locked>> | 80% | 33,054 psi | 52% | 2490 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 45,237 psi | 71% | 2789 fps | 96.7% |
| Norma 217 | <<locked>> | 96% | 36,912 psi | 58% | 2730 fps | 95.6% |
| Norma MRP | 55.4 gr | 80% | 37,724 psi | 59% | 2713 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 46,615 psi | 73% | 2815 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 44,063 psi | 69% | 2841 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 45,223 psi | 71% | 2805 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 37,565 psi | 59% | 2671 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,877 psi | 45% | 1709 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,485 psi | 74% | 2851 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,310 psi | 71% | 2861 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 35,404 psi | 55% | 2690 fps | 95.3% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 47,427 psi | 74% | 2956 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 82% | 43,772 psi | 69% | 2726 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 39,581 psi | 62% | 2684 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 50,096 psi | 79% | 2822 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,197 psi | 77% | 2802 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 47,747 psi | 75% | 2795 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,838 psi | 84% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,327 psi | 76% | 2749 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,233 psi | 61% | 2677 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 54,230 psi | 85% | 2881 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 47,456 psi | 74% | 2772 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 43,830 psi | 69% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,524 psi | 64% | 2674 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 80% | 51,938 psi | 81% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,921 psi | 75% | 2805 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 37,362 psi | 59% | 2595 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 47,674 psi | 75% | 2815 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 39,682 psi | 62% | 2700 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 86% | 45,571 psi | 71% | 2871 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 92% | 46,050 psi | 72% | 2864 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,499 psi | 73% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,863 psi | 77% | 2871 fps | 98.9% |
| Winchester StaBALL HD | 54.8 gr | 80% | 31,850 psi | 50% | 2648 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,291 psi | 62% | 2644 fps | 95.1% |
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 74 powders for .270 WSM loaded with the .277 | 140gr | Nosler CT FailSafe. Winchester StaBALL HD delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,159 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.277" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, Norma MRP, Alliant Reloder-26 rank at the top here: for .270 WSM with the .277 | 140gr | Nosler CT FailSafe they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.