Load Specifications
Load data in caliber .270 WSM with .277 | 130gr | Swift Scirocco bullet and 79 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 Norma MRP.
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>> | 96% | 55,999 psi | 88% | 3041 fps | 99.7% |
| Accurate 4350 | <<locked>> | 88% | 57,566 psi | 90% | 3087 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,086 psi | 88% | 3179 fps | 97.4% |
| Accurate MAGPRO | <<locked>> | 96% | 56,579 psi | 89% | 3169 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 82% | 54,723 psi | 86% | 2986 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,811 psi | 89% | 3117 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 96% | 54,607 psi | 86% | 3107 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,916 psi | 66% | 2900 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,029 psi | 89% | 3114 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,029 psi | 89% | 3114 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,246 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,478 psi | 89% | 3127 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,244 psi | 85% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,405 psi | 88% | 3104 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,491 psi | 85% | 3114 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,158 psi | 86% | 3100 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 3091 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,448 psi | 87% | 3192 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3153 fps | 98.4% |
| Bofors RP3 | <<locked>> | 82% | 57,740 psi | 90% | 3041 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,630 psi | 75% | 3018 fps | 95.9% |
| Bofors RP5 | <<locked>> | 96% | 54,491 psi | 85% | 3114 fps | 98.1% |
| Bofors RP7 | <<locked>> | 86% | 56,188 psi | 88% | 3015 fps | 98.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,546 psi | 79% | 3018 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 82% | 57,421 psi | 90% | 3051 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,708 psi | 86% | 3068 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 86% | 57,319 psi | 90% | 3077 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 94% | 54,737 psi | 86% | 3051 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,174 psi | 90% | 3091 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,348 psi | 90% | 3051 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,430 psi | 79% | 3140 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 86% | 54,520 psi | 85% | 3100 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 58% | 1923 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,624 psi | 90% | 3022 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,014 psi | 89% | 3048 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,159 psi | 90% | 3038 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 57,261 psi | 90% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,159 psi | 88% | 3038 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 98% | 55,840 psi | 88% | 3143 fps | 97.1% |
| Lovex S065 | <<locked>> | 86% | 54,998 psi | 86% | 2992 fps | 99.7% |
| Lovex S070 | <<locked>> | 88% | 56,391 psi | 88% | 3038 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 3005 fps | 99.5% |
| Norma 204 | <<locked>> | 88% | 54,186 psi | 85% | 3045 fps | 97.7% |
| Norma MRP | <<locked>> | 96% | 57,595 psi | 90% | 3202 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 55,100 psi | 86% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,318 psi | 88% | 3159 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 90% | 57,246 psi | 90% | 3114 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3097 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,014 psi | 60% | 1965 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,797 psi | 89% | 3028 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,305 psi | 90% | 3140 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,666 psi | 89% | 3100 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,273 psi | 85% | 3120 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,821 psi | 80% | 3136 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 82% | 54,708 psi | 86% | 2989 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,839 psi | 86% | 3022 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 94% | 55,941 psi | 88% | 3094 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 86% | 56,188 psi | 88% | 3015 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,998 psi | 86% | 2992 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 56,391 psi | 88% | 3038 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,926 psi | 86% | 3035 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,261 psi | 90% | 2900 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,711 psi | 90% | 2992 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,521 psi | 87% | 3087 fps | 98.2% |
| Somchem S355 | <<locked>> | 84% | 57,479 psi | 90% | 3031 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,681 psi | 89% | 3015 fps | 96.4% |
| Somchem S365 | <<locked>> | 90% | 55,201 psi | 87% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,159 psi | 90% | 3074 fps | 99% |
| Vihtavuori N150 | <<locked>> | 84% | 55,114 psi | 86% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,014 psi | 89% | 3051 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,941 psi | 88% | 3041 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 88% | 56,304 psi | 88% | 3058 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,201 psi | 87% | 3087 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,479 psi | 90% | 3182 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 3107 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,912 psi | 88% | 3005 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,940 psi | 86% | 3071 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3238 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,420 psi | 88% | 3058 fps | 98.2% |
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% | 34,635 psi | 54% | 2612 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 44,904 psi | 70% | 2867 fps | 99.4% |
| Accurate High Country | 60 gr | 88% | 46,311 psi | 73% | 2992 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 94% | 53,272 psi | 83% | 3110 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 51,561 psi | 81% | 2933 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 44,599 psi | 70% | 2884 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 48,167 psi | 75% | 2982 fps | 95% |
| ADI AR 2225 | <<locked>> | 98% | 39,407 psi | 62% | 2835 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 42,366 psi | 66% | 2831 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 42,366 psi | 66% | 2831 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,113 psi | 83% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,119 psi | 66% | 2858 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,805 psi | 75% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 44,527 psi | 70% | 2881 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 42,641 psi | 67% | 2884 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,605 psi | 51% | 2635 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 86% | 34,374 psi | 54% | 2697 fps | 95.8% |
| Alliant Reloder-26 | 56.2 gr | 80% | 35,172 psi | 55% | 2762 fps | 97.1% |
| Bofors RP15 | <<locked>> | 92% | 44,686 psi | 70% | 2927 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 54,404 psi | 85% | 2989 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,889 psi | 70% | 2959 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 42,641 psi | 67% | 2884 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 47,427 psi | 74% | 2858 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 47,543 psi | 75% | 2959 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 54,172 psi | 85% | 2999 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 45,614 psi | 71% | 2897 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 47,906 psi | 75% | 2904 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 51,271 psi | 80% | 2989 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 50,328 psi | 79% | 2969 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,059 psi | 63% | 2746 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 42,163 psi | 66% | 2946 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 44,440 psi | 70% | 2907 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,036 psi | 44% | 1719 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,273 psi | 85% | 2969 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,685 psi | 67% | 2779 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,022 psi | 75% | 2874 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 42,598 psi | 67% | 2808 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 49,966 psi | 78% | 2927 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 49,429 psi | 77% | 3025 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 46,528 psi | 73% | 2838 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 44,976 psi | 70% | 2828 fps | 97.6% |
| Lovex S071 | <<locked>> | 84% | 34,171 psi | 54% | 2602 fps | 95.2% |
| Norma 204 | <<locked>> | 82% | 45,005 psi | 71% | 2867 fps | 95.6% |
| Norma MRP | 57.2 gr | 84% | 39,378 psi | 62% | 2838 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 43,584 psi | 68% | 2848 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 46,528 psi | 73% | 2972 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 42,047 psi | 66% | 2828 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 42,061 psi | 66% | 2854 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,616 psi | 45% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,417 psi | 84% | 2972 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,343 psi | 79% | 3031 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,005 psi | 69% | 2874 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,974 psi | 66% | 2877 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 39,276 psi | 62% | 2867 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 51,561 psi | 81% | 2936 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 48,907 psi | 77% | 2913 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 43,918 psi | 69% | 2864 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 47,427 psi | 74% | 2858 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,528 psi | 73% | 2838 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 80% | 44,976 psi | 70% | 2828 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,619 psi | 81% | 2979 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,039 psi | 80% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,716 psi | 72% | 2782 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 43,511 psi | 68% | 2861 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 51,126 psi | 80% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 50,154 psi | 79% | 2904 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 40,509 psi | 63% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 39,972 psi | 63% | 2743 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 48,965 psi | 77% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,657 psi | 70% | 2835 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 41,495 psi | 65% | 2772 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 44,483 psi | 70% | 2844 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 36,521 psi | 57% | 2720 fps | 98.3% |
| Vihtavuori N560 | <<locked>> | 92% | 50,720 psi | 79% | 3061 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 47,834 psi | 75% | 2989 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,482 psi | 68% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,788 psi | 72% | 2900 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,530 psi | 46% | 2641 fps | 98.2% |
| Winchester Supreme 780 | <<locked>> | 88% | 43,845 psi | 69% | 2828 fps | 95.4% |
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 79 powders for .270 WSM loaded with the .277 | 130gr | Swift Scirocco. Winchester StaBALL HD delivers the highest muzzle velocity at 3,238 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,238 fps. ADI AR 2225 gives the best case fill at 100 %, and 79 of the 79 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 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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, Norma MRP rank at the top here: for .270 WSM with the .277 | 130gr | Swift Scirocco 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.