Load Specifications
Load data in caliber .270 WSM with .277 | 130gr | RWS H-Mantel 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.
A valid access license is required to use the Personalized Load Calculator.
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 3100 | <<locked>> | 94% | 55,317 psi | 87% | 3038 fps | 99.7% |
| Accurate 4350 | <<locked>> | 86% | 56,405 psi | 88% | 3077 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,129 psi | 86% | 3169 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 94% | 55,999 psi | 88% | 3169 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 82% | 56,333 psi | 88% | 3022 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,390 psi | 87% | 3104 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 96% | 56,927 psi | 89% | 3163 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,714 psi | 69% | 2956 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,028 psi | 88% | 3107 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,593 psi | 87% | 3120 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,855 psi | 89% | 3140 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,347 psi | 87% | 3097 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,014 psi | 89% | 3166 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,665 psi | 86% | 3097 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,853 psi | 84% | 3146 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,781 psi | 86% | 3186 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,999 psi | 88% | 3150 fps | 98.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,140 psi | 79% | 3074 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 57,014 psi | 89% | 3166 fps | 98.7% |
| Bofors RP7 | <<locked>> | 84% | 54,955 psi | 86% | 3009 fps | 98.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 3081 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 56,927 psi | 89% | 3117 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 84% | 56,057 psi | 88% | 3068 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 94% | 57,072 psi | 89% | 3100 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,796 psi | 87% | 3081 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,318 psi | 88% | 3045 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,721 psi | 83% | 3199 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 57,101 psi | 89% | 3150 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,318 psi | 58% | 1939 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,637 psi | 87% | 3038 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,767 psi | 87% | 3028 fps | 99.3% |
| IMR 4831 | <<locked>> | 88% | 56,246 psi | 88% | 3064 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,737 psi | 86% | 3028 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 96% | 54,868 psi | 86% | 3140 fps | 97.2% |
| Lovex S065 | <<locked>> | 86% | 56,927 psi | 89% | 3035 fps | 99.9% |
| Lovex S070 | <<locked>> | 86% | 55,347 psi | 87% | 3031 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,101 psi | 88% | 3051 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 56,420 psi | 88% | 3094 fps | 98.3% |
| Norma 217ᴾ | <<locked>> | 100% | 39,871 psi | 62% | 2894 fps | 95.9% |
| Norma MRP | <<locked>> | 94% | 56,797 psi | 89% | 3192 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 57,435 psi | 90% | 3104 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,463 psi | 87% | 3156 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 88% | 56,072 psi | 88% | 3100 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,667 psi | 90% | 3156 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 60% | 1988 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,188 psi | 88% | 3130 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,637 psi | 87% | 3094 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,855 psi | 89% | 3169 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,417 psi | 84% | 3199 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 82% | 56,782 psi | 89% | 3028 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,101 psi | 89% | 3074 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 92% | 55,071 psi | 86% | 3091 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 84% | 54,955 psi | 86% | 3009 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,927 psi | 89% | 3035 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 55,347 psi | 87% | 3031 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,043 psi | 89% | 3077 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,869 psi | 88% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,217 psi | 88% | 2982 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,607 psi | 86% | 3084 fps | 98.3% |
| Somchem S355 | <<locked>> | 82% | 56,173 psi | 88% | 3018 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,390 psi | 87% | 3005 fps | 96.5% |
| Somchem S365 | <<locked>> | 90% | 57,725 psi | 90% | 3110 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,159 psi | 88% | 3068 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 84% | 56,913 psi | 89% | 2982 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,738 psi | 87% | 3041 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,027 psi | 86% | 3035 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 86% | 55,332 psi | 87% | 3051 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,578 psi | 86% | 3084 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,565 psi | 89% | 3179 fps | 97.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3163 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,926 psi | 86% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,145 psi | 90% | 3117 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,694 psi | 86% | 3235 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,332 psi | 87% | 3051 fps | 98.3% |
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% | 36,260 psi | 57% | 2661 fps | 96.2% |
| Accurate 4350 | <<locked>> | 80% | 46,891 psi | 73% | 2913 fps | 99.7% |
| Accurate High Country | 61.1 gr | 86% | 45,672 psi | 72% | 2986 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 92% | 52,388 psi | 82% | 3100 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 53,243 psi | 83% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 43,569 psi | 68% | 2871 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 47,340 psi | 74% | 2979 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 94% | 36,883 psi | 58% | 2779 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,524 psi | 65% | 2818 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,772 psi | 69% | 2904 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,922 psi | 78% | 3028 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 43,555 psi | 68% | 2867 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 41,887 psi | 66% | 2871 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,968 psi | 53% | 2677 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 33,750 psi | 53% | 2687 fps | 95.9% |
| Alliant Reloder-26 | 58.5 gr | 80% | 36,811 psi | 58% | 2815 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 41,597 psi | 65% | 2864 fps | 95% |
| Bofors RP30 | <<locked>> | 96% | 44,469 psi | 70% | 2956 fps | 95.3% |
| Bofors RP5 | <<locked>> | 86% | 41,887 psi | 66% | 2871 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 48,878 psi | 77% | 2897 fps | 98% |
| Hodgdon H1000 | <<locked>> | 94% | 44,005 psi | 69% | 2894 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 47,340 psi | 74% | 2943 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 49,632 psi | 78% | 2949 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 50,343 psi | 79% | 2982 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 49,429 psi | 77% | 2963 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,945 psi | 66% | 2792 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 41,582 psi | 65% | 2946 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 46,441 psi | 73% | 2959 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,079 psi | 44% | 1736 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,121 psi | 69% | 2822 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,690 psi | 78% | 2920 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 44,411 psi | 70% | 2851 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 48,762 psi | 76% | 2917 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 48,544 psi | 76% | 3018 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 48,008 psi | 75% | 2877 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 46,543 psi | 73% | 2867 fps | 98.2% |
| Lovex S071 | <<locked>> | 82% | 33,866 psi | 53% | 2598 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 44,034 psi | 69% | 2858 fps | 95.6% |
| Norma 217 | <<locked>> | 98% | 37,724 psi | 59% | 2835 fps | 95% |
| Norma MRP | <<locked>> | 82% | 38,812 psi | 61% | 2831 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 45,223 psi | 71% | 2887 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 45,701 psi | 72% | 2966 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 43,976 psi | 69% | 2877 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 88% | 38,827 psi | 61% | 2785 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 45% | 1778 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,663 psi | 83% | 3074 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,050 psi | 72% | 2923 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,903 psi | 69% | 2930 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 38,841 psi | 61% | 2867 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 53,417 psi | 84% | 2976 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 47,863 psi | 75% | 2907 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 40,756 psi | 64% | 2805 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 48,878 psi | 77% | 2897 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,008 psi | 75% | 2877 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 46,543 psi | 73% | 2867 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,679 psi | 84% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,765 psi | 83% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,079 psi | 74% | 2818 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 42,830 psi | 67% | 2851 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 52,881 psi | 83% | 2966 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 49,052 psi | 77% | 2894 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 42,264 psi | 66% | 2851 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,276 psi | 62% | 2736 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 50,575 psi | 79% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,514 psi | 73% | 2877 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 40,785 psi | 64% | 2762 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 46,195 psi | 72% | 2887 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 38,348 psi | 60% | 2766 fps | 98.9% |
| Vihtavuori N560 | <<locked>> | 90% | 49,879 psi | 78% | 3054 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 47,326 psi | 74% | 2986 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,324 psi | 71% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,587 psi | 75% | 2946 fps | 98.3% |
| Winchester StaBALL HD | 56.2 gr | 80% | 30,893 psi | 48% | 2700 fps | 99% |
| Winchester Supreme 780 | <<locked>> | 86% | 42,946 psi | 67% | 2818 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 74 powders for .270 WSM loaded with the .277 | 130gr | RWS H-Mantel. Winchester StaBALL HD delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,235 fps. ADI AR 2225 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 58–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.277" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP30 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 | RWS H-Mantel 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.