Load Specifications
Load data in caliber .270 WSM with .277 | 140gr | RWS Speed Tip Professional bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Winchester StaBALL HD.
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% | 55,796 psi | 87% | 2943 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 57,188 psi | 90% | 2979 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,796 psi | 87% | 3077 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 94% | 56,724 psi | 89% | 3074 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 57,014 psi | 89% | 2923 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,304 psi | 88% | 3012 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 57,551 psi | 90% | 3068 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,965 psi | 77% | 2900 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,251 psi | 69% | 2877 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,318 psi | 88% | 3022 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,740 psi | 90% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,999 psi | 88% | 3002 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,696 psi | 90% | 3074 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,506 psi | 87% | 3002 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 3051 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,535 psi | 87% | 3087 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,652 psi | 89% | 3054 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,821 psi | 80% | 2989 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 57,696 psi | 90% | 3074 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 55,550 psi | 87% | 2910 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 2992 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 54,201 psi | 85% | 2963 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 84% | 56,637 psi | 89% | 2969 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 57,740 psi | 90% | 3009 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,637 psi | 89% | 2989 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,130 psi | 90% | 2943 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,461 psi | 84% | 3110 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 84% | 53,838 psi | 84% | 2989 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,478 psi | 59% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,333 psi | 88% | 2943 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,159 psi | 88% | 2927 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 56,826 psi | 89% | 2963 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,434 psi | 87% | 2936 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 96% | 55,535 psi | 87% | 3048 fps | 97.9% |
| Lovex S065 | <<locked>> | 86% | 57,667 psi | 90% | 2940 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,941 psi | 88% | 2933 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,913 psi | 89% | 2959 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 57,246 psi | 90% | 2999 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 40,364 psi | 63% | 2815 fps | 96.9% |
| Norma MRP | <<locked>> | 94% | 57,624 psi | 90% | 3100 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 54,868 psi | 86% | 2953 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,086 psi | 88% | 3064 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 88% | 56,811 psi | 89% | 3005 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 54,665 psi | 86% | 3005 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 60% | 1903 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,014 psi | 89% | 3025 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,434 psi | 88% | 2999 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,421 psi | 90% | 3071 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,070 psi | 85% | 3110 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 57,363 psi | 90% | 2923 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,462 psi | 85% | 2923 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 92% | 55,883 psi | 88% | 2999 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 84% | 55,550 psi | 87% | 2910 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,667 psi | 90% | 2940 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,941 psi | 88% | 2933 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,624 psi | 90% | 2972 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,376 psi | 88% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,884 psi | 89% | 2884 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,419 psi | 87% | 2992 fps | 98.8% |
| Somchem S355 | <<locked>> | 82% | 56,681 psi | 89% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,898 psi | 88% | 2913 fps | 97.1% |
| Somchem S365 | <<locked>> | 88% | 55,013 psi | 86% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,855 psi | 89% | 2972 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 57,624 psi | 90% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,463 psi | 88% | 2943 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,622 psi | 87% | 2943 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 86% | 55,883 psi | 88% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,085 psi | 86% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,348 psi | 90% | 3087 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3071 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,521 psi | 87% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,476 psi | 85% | 2966 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,695 psi | 87% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,941 psi | 88% | 2956 fps | 98.7% |
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 3100 | <<locked>> | 80% | 36,869 psi | 58% | 2582 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 47,616 psi | 75% | 2822 fps | 99.9% |
| Accurate High Country | 57.2 gr | 84% | 43,468 psi | 68% | 2841 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 90% | 49,792 psi | 78% | 2953 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 53,940 psi | 85% | 2874 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 41,626 psi | 65% | 2730 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 45,005 psi | 71% | 2831 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 46,064 psi | 72% | 2844 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 92% | 35,244 psi | 55% | 2648 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,295 psi | 69% | 2808 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,546 psi | 79% | 2930 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,320 psi | 62% | 2674 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 40,118 psi | 63% | 2736 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,432 psi | 54% | 2598 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,632 psi | 48% | 2507 fps | 95.1% |
| Alliant Reloder-26 | 56.1 gr | 80% | 37,333 psi | 59% | 2736 fps | 98.6% |
| Bofors RP15 | <<locked>> | 86% | 39,885 psi | 63% | 2730 fps | 95.2% |
| Bofors RP30 | <<locked>> | 94% | 42,409 psi | 66% | 2818 fps | 95.3% |
| Bofors RP5 | <<locked>> | 84% | 40,118 psi | 63% | 2736 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 49,414 psi | 77% | 2805 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 92% | 41,858 psi | 66% | 2756 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 47,935 psi | 75% | 2848 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 50,154 psi | 79% | 2858 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 47,863 psi | 75% | 2835 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,992 psi | 74% | 2818 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,496 psi | 67% | 2703 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 39,740 psi | 62% | 2805 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 47,224 psi | 74% | 2874 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,239 psi | 44% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,715 psi | 70% | 2733 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,256 psi | 79% | 2825 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 44,875 psi | 70% | 2759 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 46,601 psi | 73% | 2776 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 90% | 46,311 psi | 73% | 2871 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 48,515 psi | 76% | 2785 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 47,079 psi | 74% | 2779 fps | 98.7% |
| Lovex S071 | <<locked>> | 80% | 32,416 psi | 51% | 2470 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 44,585 psi | 70% | 2772 fps | 96.4% |
| Norma 217 | <<locked>> | 96% | 36,158 psi | 57% | 2707 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 37,144 psi | 58% | 2694 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 45,847 psi | 72% | 2795 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 43,381 psi | 68% | 2822 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 44,527 psi | 70% | 2789 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 86% | 36,912 psi | 58% | 2651 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,848 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,316 psi | 84% | 2972 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,789 psi | 73% | 2835 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,469 psi | 70% | 2841 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 37,014 psi | 58% | 2730 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 54,056 psi | 85% | 2874 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 45,585 psi | 71% | 2759 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 38,899 psi | 61% | 2664 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 49,414 psi | 77% | 2805 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,515 psi | 76% | 2785 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 47,079 psi | 74% | 2779 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,389 psi | 85% | 2923 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,084 psi | 83% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,645 psi | 75% | 2730 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 40,915 psi | 64% | 2713 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 53,447 psi | 84% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 46,775 psi | 73% | 2753 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 42,960 psi | 67% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,726 psi | 62% | 2651 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 80% | 51,184 psi | 80% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,166 psi | 74% | 2789 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 38,943 psi | 61% | 2631 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 46,760 psi | 73% | 2795 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 38,943 psi | 61% | 2684 fps | 99.3% |
| Vihtavuori N560 | <<locked>> | 88% | 47,485 psi | 74% | 2907 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 92% | 45,020 psi | 71% | 2841 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,919 psi | 72% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,124 psi | 75% | 2854 fps | 98.8% |
| Winchester StaBALL HD | 53.9 gr | 80% | 31,357 psi | 49% | 2628 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 84% | 40,857 psi | 64% | 2680 fps | 95.5% |
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 80 powders for .270 WSM loaded with the .277 | 140gr | RWS Speed Tip Professional. Winchester StaBALL HD delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,857 fps to 3,136 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 1:10.0 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. Alliant Reloder-26, Accurate High Country, Winchester StaBALL HD rank at the top here: for .270 WSM with the .277 | 140gr | RWS Speed Tip Professional they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, Vihtavuori N170 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.