Load Specifications
Load data in caliber .270 WSM with .277 | 130gr | Winchester Powerpoint 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, Winchester StaBALL HD and IMR 7828 SSC.
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% | 56,333 psi | 88% | 3058 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 57,696 psi | 90% | 3100 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,492 psi | 89% | 3196 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 94% | 57,406 psi | 90% | 3196 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 82% | 57,203 psi | 90% | 3041 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,695 psi | 89% | 3130 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 94% | 54,737 psi | 86% | 3130 fps | 97.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,632 psi | 78% | 3018 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,759 psi | 70% | 2986 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,246 psi | 90% | 3130 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,246 psi | 90% | 3130 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,753 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,505 psi | 85% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,594 psi | 89% | 3123 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,027 psi | 86% | 3136 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,999 psi | 88% | 3120 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,998 psi | 86% | 3169 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,202 psi | 88% | 3209 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 57,479 psi | 90% | 3176 fps | 98.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,503 psi | 81% | 3100 fps | 97.3% |
| Bofors RP5 | <<locked>> | 94% | 55,027 psi | 86% | 3136 fps | 98.5% |
| Bofors RP7 | <<locked>> | 84% | 55,767 psi | 87% | 3028 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,157 psi | 85% | 3107 fps | 98% |
| Hodgdon H414 | <<locked>> | 84% | 54,607 psi | 86% | 3081 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 84% | 56,898 psi | 89% | 3087 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 92% | 54,752 psi | 86% | 3068 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,276 psi | 90% | 3110 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,508 psi | 90% | 3064 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,085 psi | 85% | 3228 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 84% | 54,389 psi | 85% | 3107 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 59% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,637 psi | 89% | 3061 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,637 psi | 89% | 3048 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 57,363 psi | 90% | 3084 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,825 psi | 87% | 3051 fps | 97% |
| IMR 7828 SSC | <<locked>> | 96% | 55,985 psi | 88% | 3163 fps | 97.6% |
| Lovex S065 | <<locked>> | 84% | 54,708 psi | 86% | 3002 fps | 99.8% |
| Lovex S070 | <<locked>> | 86% | 56,202 psi | 88% | 3051 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3074 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 57,740 psi | 90% | 3120 fps | 98.6% |
| Norma 217ᴾ | <<locked>> | 100% | 40,814 psi | 64% | 2920 fps | 96.5% |
| Norma MRP | <<locked>> | 92% | 54,592 psi | 86% | 3159 fps | 99.4% |
| Norma URP | <<locked>> | 86% | 55,129 psi | 86% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,652 psi | 89% | 3182 fps | 98% |
| Ramshot Hunter | <<locked>> | 88% | 57,319 psi | 90% | 3127 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 55,274 psi | 87% | 3123 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,232 psi | 60% | 1995 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,493 psi | 90% | 3150 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,768 psi | 89% | 3114 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,389 psi | 85% | 3133 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,810 psi | 86% | 3228 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 82% | 57,725 psi | 90% | 3048 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,839 psi | 86% | 3041 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 92% | 56,318 psi | 88% | 3114 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 84% | 55,767 psi | 87% | 3028 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,708 psi | 86% | 3002 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 56,202 psi | 88% | 3051 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,550 psi | 89% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,261 psi | 90% | 3005 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,854 psi | 88% | 3107 fps | 98.6% |
| Somchem S355 | <<locked>> | 82% | 57,101 psi | 89% | 3038 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,376 psi | 88% | 3028 fps | 96.9% |
| Somchem S365 | <<locked>> | 88% | 55,390 psi | 87% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,101 psi | 89% | 3087 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 82% | 54,636 psi | 86% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,811 psi | 89% | 3061 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,188 psi | 88% | 3058 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 86% | 56,362 psi | 88% | 3071 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,724 psi | 87% | 3104 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,259 psi | 85% | 3143 fps | 96.8% |
| Vihtavuori N565 | <<locked>> | 98% | 54,969 psi | 86% | 3133 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,782 psi | 87% | 3012 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,868 psi | 86% | 3084 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,637 psi | 89% | 3258 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,550 psi | 89% | 3074 fps | 98.6% |
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 3100 | <<locked>> | 80% | 37,057 psi | 58% | 2684 fps | 96.6% |
| Accurate 4350 | <<locked>> | 80% | 47,863 psi | 75% | 2936 fps | 99.8% |
| Accurate High Country | <<locked>> | 86% | 46,731 psi | 73% | 3012 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 90% | 50,314 psi | 79% | 3068 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 54,143 psi | 85% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 41,872 psi | 66% | 2838 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 90% | 48,153 psi | 75% | 3002 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 98% | 46,601 psi | 73% | 2953 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 94% | 37,695 psi | 59% | 2808 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 42,279 psi | 66% | 2841 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 42,279 psi | 66% | 2841 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,657 psi | 70% | 2923 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,937 psi | 80% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 41,930 psi | 66% | 2835 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 42,859 psi | 67% | 2897 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,751 psi | 54% | 2700 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 32,590 psi | 51% | 2657 fps | 95.4% |
| Alliant Reloder-26 | 59.7 gr | 80% | 37,710 psi | 59% | 2838 fps | 98.3% |
| Bofors RP15 | <<locked>> | 88% | 42,554 psi | 67% | 2890 fps | 95.5% |
| Bofors RP30 | <<locked>> | 96% | 45,556 psi | 71% | 2982 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 42,859 psi | 67% | 2897 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 49,734 psi | 78% | 2920 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 44,918 psi | 70% | 2923 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 48,443 psi | 76% | 2966 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 50,473 psi | 79% | 2969 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 51,474 psi | 81% | 3009 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 90% | 50,386 psi | 79% | 2989 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,656 psi | 67% | 2812 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 40,132 psi | 63% | 2910 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 47,630 psi | 75% | 2986 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 44% | 1745 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,889 psi | 70% | 2841 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,502 psi | 79% | 2940 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 45,324 psi | 71% | 2874 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 88% | 49,632 psi | 78% | 2936 fps | 95.6% |
| IMR 7828 SSC | 62.7 gr | 90% | 46,514 psi | 73% | 2979 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 48,863 psi | 77% | 2900 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 47,326 psi | 74% | 2887 fps | 98.4% |
| Lovex S071 | <<locked>> | 80% | 32,634 psi | 51% | 2569 fps | 95% |
| Norma 204 | <<locked>> | 80% | 44,802 psi | 70% | 2877 fps | 96% |
| Norma 217 | <<locked>> | 98% | 38,609 psi | 61% | 2864 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 37,275 psi | 58% | 2792 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 46,122 psi | 72% | 2907 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 46,543 psi | 73% | 2992 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 44,759 psi | 70% | 2897 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 88% | 39,784 psi | 62% | 2815 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,950 psi | 45% | 1788 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,737 psi | 84% | 3094 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,137 psi | 74% | 2946 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,701 psi | 70% | 2953 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 37,289 psi | 58% | 2828 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 54,360 psi | 85% | 2995 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 45,963 psi | 72% | 2871 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 41,582 psi | 65% | 2825 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 49,734 psi | 78% | 2920 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,863 psi | 77% | 2900 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 47,326 psi | 74% | 2887 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,432 psi | 84% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,848 psi | 75% | 2841 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 41,205 psi | 65% | 2822 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 53,853 psi | 84% | 2986 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 50,067 psi | 78% | 2920 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 43,265 psi | 68% | 2874 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,030 psi | 63% | 2756 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 51,503 psi | 81% | 2904 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,355 psi | 74% | 2900 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 84% | 39,291 psi | 62% | 2733 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 47,021 psi | 74% | 2907 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 39,030 psi | 61% | 2785 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 88% | 47,834 psi | 75% | 3018 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 94% | 48,457 psi | 76% | 3012 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,064 psi | 72% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,443 psi | 76% | 2966 fps | 98.5% |
| Winchester StaBALL HD | 57.3 gr | 80% | 31,502 psi | 49% | 2723 fps | 99.3% |
| Winchester Supreme 780 | <<locked>> | 84% | 41,249 psi | 65% | 2782 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 75 powders for .270 WSM loaded with the .277 | 130gr | Winchester Powerpoint. Winchester StaBALL HD delivers the highest muzzle velocity at 3,258 fps; across all powders the maximum-charge window runs from 1,949 fps to 3,258 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 1:14.0 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, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for .270 WSM with the .277 | 130gr | Winchester Powerpoint 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.