Load Specifications
Load data in caliber .270 WSM with .277 | 130gr | Norma Semi Soft Point bullet and 75 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% | 55,709 psi | 87% | 3048 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 56,927 psi | 89% | 3087 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,825 psi | 87% | 3182 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 94% | 56,594 psi | 89% | 3179 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 82% | 56,797 psi | 89% | 3035 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,115 psi | 88% | 3117 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 57,479 psi | 90% | 3173 fps | 97.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,965 psi | 77% | 3002 fps | 96% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,179 psi | 69% | 2969 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,391 psi | 88% | 3114 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,072 psi | 88% | 3130 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,522 psi | 90% | 3153 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,753 psi | 87% | 3107 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,609 psi | 90% | 3179 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,085 psi | 86% | 3107 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,273 psi | 85% | 3153 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,550 psi | 87% | 3199 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,594 psi | 89% | 3159 fps | 98.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,763 psi | 80% | 3087 fps | 97.1% |
| Bofors RP5 | <<locked>> | 96% | 57,609 psi | 90% | 3179 fps | 98.8% |
| Bofors RP7 | <<locked>> | 84% | 55,361 psi | 87% | 3018 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,447 psi | 84% | 3091 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 57,638 psi | 90% | 3130 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 56,478 psi | 89% | 3074 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 57,450 psi | 90% | 3110 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,449 psi | 88% | 3094 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,811 psi | 89% | 3051 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,301 psi | 84% | 3212 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 57,537 psi | 90% | 3156 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 59% | 1942 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,289 psi | 88% | 3051 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,202 psi | 88% | 3038 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 56,695 psi | 89% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,288 psi | 87% | 3038 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 96% | 55,434 psi | 87% | 3150 fps | 97.4% |
| Lovex S065 | <<locked>> | 86% | 57,363 psi | 90% | 3045 fps | 99.9% |
| Lovex S070 | <<locked>> | 86% | 55,811 psi | 87% | 3041 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,724 psi | 89% | 3064 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 57,159 psi | 90% | 3107 fps | 98.5% |
| Norma 217ᴾ | <<locked>> | 100% | 40,350 psi | 63% | 2907 fps | 96.2% |
| Norma MRP | <<locked>> | 94% | 57,464 psi | 90% | 3209 fps | 99.6% |
| Norma URP | <<locked>> | 86% | 54,679 psi | 86% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,057 psi | 88% | 3169 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 88% | 56,710 psi | 89% | 3114 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 98% | 54,534 psi | 85% | 3107 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,334 psi | 60% | 1991 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,695 psi | 89% | 3136 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,115 psi | 88% | 3100 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,261 psi | 90% | 3179 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3212 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 82% | 57,232 psi | 90% | 3038 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,450 psi | 90% | 3081 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 92% | 55,709 psi | 87% | 3100 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 84% | 55,361 psi | 87% | 3018 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,363 psi | 90% | 3045 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 55,811 psi | 87% | 3041 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,508 psi | 90% | 3084 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,115 psi | 88% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,608 psi | 89% | 2992 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,259 psi | 87% | 3094 fps | 98.5% |
| Somchem S355 | <<locked>> | 82% | 56,376 psi | 88% | 3025 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,956 psi | 88% | 3018 fps | 96.7% |
| Somchem S365 | <<locked>> | 88% | 54,897 psi | 86% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,536 psi | 89% | 3077 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 57,334 psi | 90% | 2992 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,173 psi | 88% | 3051 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,651 psi | 87% | 3048 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 86% | 55,709 psi | 87% | 3058 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,056 psi | 86% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,203 psi | 90% | 3192 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3176 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,259 psi | 87% | 3002 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,638 psi | 90% | 3130 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,477 psi | 87% | 3245 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,956 psi | 88% | 3061 fps | 98.4% |
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% | 36,651 psi | 57% | 2671 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 47,355 psi | 74% | 2923 fps | 99.7% |
| Accurate High Country | 61.6 gr | 86% | 46,108 psi | 72% | 2995 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 92% | 52,953 psi | 83% | 3114 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 53,693 psi | 84% | 2982 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 41,466 psi | 65% | 2825 fps | 95% |
| ADI AR 2213 | <<locked>> | 90% | 47,645 psi | 75% | 2986 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 98% | 46,006 psi | 72% | 2936 fps | 95% |
| ADI AR 2225 | <<locked>> | 94% | 37,275 psi | 58% | 2792 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,858 psi | 66% | 2831 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,179 psi | 69% | 2913 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,430 psi | 79% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 41,539 psi | 65% | 2822 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 42,482 psi | 67% | 2887 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,330 psi | 54% | 2690 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 32,271 psi | 51% | 2644 fps | 95.2% |
| Alliant Reloder-26 | 59 gr | 80% | 37,173 psi | 58% | 2825 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 42,032 psi | 66% | 2874 fps | 95.3% |
| Bofors RP30 | <<locked>> | 96% | 45,005 psi | 71% | 2972 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 42,482 psi | 67% | 2887 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 49,342 psi | 77% | 2907 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 44,295 psi | 69% | 2907 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 47,761 psi | 75% | 2949 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 50,067 psi | 78% | 2959 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 50,662 psi | 79% | 2992 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 49,763 psi | 78% | 2972 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,192 psi | 66% | 2799 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 42,061 psi | 66% | 2959 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 47,007 psi | 74% | 2972 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,181 psi | 44% | 1742 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,527 psi | 70% | 2831 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,893 psi | 78% | 2927 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 44,686 psi | 70% | 2858 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 49,342 psi | 77% | 2930 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 90% | 46,006 psi | 72% | 2966 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 48,472 psi | 76% | 2887 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 46,920 psi | 74% | 2877 fps | 98.3% |
| Lovex S071 | <<locked>> | 82% | 34,098 psi | 53% | 2605 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 44,382 psi | 70% | 2864 fps | 95.8% |
| Norma 217 | <<locked>> | 98% | 38,014 psi | 60% | 2844 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 36,912 psi | 58% | 2782 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 45,701 psi | 72% | 2897 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 45,977 psi | 72% | 2976 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 44,324 psi | 69% | 2887 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 88% | 39,146 psi | 61% | 2795 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,935 psi | 45% | 1785 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,185 psi | 83% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,514 psi | 73% | 2933 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,280 psi | 69% | 2940 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 36,898 psi | 58% | 2815 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 53,867 psi | 84% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 48,240 psi | 76% | 2917 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 40,959 psi | 64% | 2808 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 49,342 psi | 77% | 2907 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,472 psi | 76% | 2887 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 46,920 psi | 74% | 2877 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,157 psi | 85% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,953 psi | 83% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,471 psi | 74% | 2828 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 40,669 psi | 64% | 2805 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 53,316 psi | 84% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 49,559 psi | 78% | 2907 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 42,728 psi | 67% | 2861 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,668 psi | 62% | 2746 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 51,010 psi | 80% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,963 psi | 74% | 2890 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 41,133 psi | 64% | 2772 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 46,659 psi | 73% | 2897 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 38,609 psi | 61% | 2776 fps | 98.9% |
| Vihtavuori N560 | <<locked>> | 90% | 50,285 psi | 79% | 3064 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 94% | 47,892 psi | 75% | 2995 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,672 psi | 72% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,979 psi | 75% | 2956 fps | 98.4% |
| Winchester StaBALL HD | 56.7 gr | 80% | 31,198 psi | 49% | 2710 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 86% | 43,468 psi | 68% | 2828 fps | 95.7% |
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 75 powders for .270 WSM loaded with the .277 | 130gr | Norma Semi Soft Point. Winchester StaBALL HD delivers the highest muzzle velocity at 3,245 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,245 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 130.0 gr projectile in 0.277" calls for a 1:13.0 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 | 130gr | Norma Semi Soft Point 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.