Load Specifications
Load data in caliber .270 WSM with .277 | 140gr | Speer TBBC bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and Alliant Reloder-26.
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% | 57,043 psi | 89% | 2963 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,897 psi | 86% | 2949 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 57,261 psi | 90% | 3104 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 92% | 54,447 psi | 85% | 3041 fps | 96.7% |
| ADI AR 2209 | <<locked>> | 92% | 57,421 psi | 90% | 3035 fps | 99% |
| ADI AR 2213 | <<locked>> | 94% | 55,216 psi | 87% | 3035 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,009 psi | 78% | 2927 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,252 psi | 71% | 2904 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,491 psi | 85% | 2979 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,435 psi | 90% | 3041 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,114 psi | 86% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,058 psi | 89% | 3025 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,492 psi | 87% | 3041 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,739 psi | 89% | 3022 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,796 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,130 psi | 90% | 3114 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 54,737 psi | 86% | 3025 fps | 98.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,185 psi | 82% | 3015 fps | 97.9% |
| Bofors RP5 | <<locked>> | 94% | 55,492 psi | 87% | 3041 fps | 99% |
| Bofors RP7 | <<locked>> | 84% | 56,260 psi | 88% | 2930 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,795 psi | 86% | 3018 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 84% | 55,172 psi | 86% | 2982 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 57,580 psi | 90% | 2989 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 92% | 55,361 psi | 87% | 2972 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,711 psi | 90% | 3012 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,824 psi | 86% | 2913 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3140 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 84% | 55,013 psi | 86% | 3015 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 59% | 1867 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,217 psi | 90% | 2966 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,159 psi | 90% | 2949 fps | 99.7% |
| IMR 4831 | <<locked>> | 86% | 54,578 psi | 86% | 2933 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,492 psi | 89% | 2959 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 96% | 56,579 psi | 89% | 3071 fps | 98.2% |
| Lovex S065 | <<locked>> | 84% | 55,405 psi | 87% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,898 psi | 89% | 2953 fps | 99.8% |
| Lovex S071 | <<locked>> | 98% | 54,679 psi | 86% | 2930 fps | 99.9% |
| Norma 204 | <<locked>> | 86% | 54,795 psi | 86% | 2966 fps | 98.6% |
| Norma 217ᴾ | <<locked>> | 100% | 41,379 psi | 65% | 2841 fps | 97.3% |
| Norma MRP | <<locked>> | 92% | 55,463 psi | 87% | 3068 fps | 99.7% |
| Norma URP | <<locked>> | 86% | 55,869 psi | 88% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,508 psi | 90% | 3094 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 86% | 54,491 psi | 85% | 2972 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 55,956 psi | 88% | 3031 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,290 psi | 60% | 1909 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,435 psi | 90% | 3015 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,926 psi | 86% | 3035 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,419 psi | 87% | 3136 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 3025 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 90% | 55,288 psi | 87% | 2946 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 92% | 56,797 psi | 89% | 3015 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 84% | 56,260 psi | 88% | 2930 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,405 psi | 87% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,898 psi | 89% | 2953 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,188 psi | 90% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,505 psi | 85% | 2854 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,333 psi | 88% | 3012 fps | 99% |
| Somchem S355 | <<locked>> | 82% | 57,740 psi | 90% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,072 psi | 89% | 2940 fps | 97.5% |
| Somchem S365 | <<locked>> | 88% | 56,173 psi | 88% | 2979 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,505 psi | 85% | 2940 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 82% | 55,361 psi | 87% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,450 psi | 90% | 2963 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,927 psi | 89% | 2966 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 86% | 56,811 psi | 89% | 2969 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,434 psi | 88% | 3005 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,085 psi | 86% | 3054 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 98% | 55,637 psi | 87% | 3041 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,536 psi | 89% | 2917 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,448 psi | 87% | 2986 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,435 psi | 90% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,261 psi | 90% | 2982 fps | 99% |
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% | 37,608 psi | 59% | 2605 fps | 97.4% |
| Accurate 4350 | <<locked>> | 80% | 48,530 psi | 76% | 2841 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 44,425 psi | 70% | 2864 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 88% | 47,703 psi | 75% | 2917 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 39,885 psi | 63% | 2694 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 88% | 45,977 psi | 72% | 2858 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 96% | 44,411 psi | 70% | 2815 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 92% | 35,998 psi | 56% | 2674 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,335 psi | 63% | 2700 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,107 psi | 71% | 2831 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,663 psi | 81% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,987 psi | 63% | 2694 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,479 psi | 60% | 2700 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,288 psi | 55% | 2621 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,212 psi | 49% | 2530 fps | 95.6% |
| Alliant Reloder-26 | 57.2 gr | 80% | 38,247 psi | 60% | 2759 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 40,741 psi | 64% | 2749 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 41,002 psi | 64% | 2789 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 38,479 psi | 60% | 2700 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 50,227 psi | 79% | 2825 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 42,714 psi | 67% | 2782 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 48,979 psi | 77% | 2874 fps | 99% |
| Hodgdon H4350 | <<locked>> | 80% | 51,126 psi | 80% | 2881 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 86% | 45,861 psi | 72% | 2802 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 88% | 48,022 psi | 75% | 2844 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,337 psi | 68% | 2720 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 38,421 psi | 60% | 2776 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 48,153 psi | 75% | 2894 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 44% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,368 psi | 71% | 2753 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,981 psi | 80% | 2844 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 45,861 psi | 72% | 2782 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 86% | 47,398 psi | 74% | 2795 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 88% | 44,396 psi | 70% | 2835 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 49,516 psi | 78% | 2808 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 47,863 psi | 75% | 2799 fps | 98.9% |
| Lovex S071 | <<locked>> | 80% | 33,098 psi | 52% | 2490 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 45,513 psi | 71% | 2795 fps | 96.8% |
| Norma 217 | <<locked>> | 96% | 36,985 psi | 58% | 2733 fps | 95.7% |
| Norma MRP | 55.5 gr | 80% | 37,811 psi | 59% | 2717 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 46,659 psi | 73% | 2815 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 44,353 psi | 70% | 2848 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 45,498 psi | 71% | 2812 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 37,811 psi | 59% | 2677 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,008 psi | 45% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,805 psi | 75% | 2858 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,368 psi | 71% | 2864 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 35,607 psi | 56% | 2694 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 47,471 psi | 74% | 2956 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 82% | 43,874 psi | 69% | 2730 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 39,610 psi | 62% | 2684 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 50,227 psi | 79% | 2825 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,516 psi | 78% | 2808 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 47,863 psi | 75% | 2799 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,896 psi | 84% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,385 psi | 76% | 2749 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,262 psi | 62% | 2680 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 54,578 psi | 86% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 47,485 psi | 74% | 2772 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 43,874 psi | 69% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,625 psi | 64% | 2674 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 51,982 psi | 81% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,964 psi | 75% | 2808 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 37,391 psi | 59% | 2598 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 47,703 psi | 75% | 2815 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 39,769 psi | 62% | 2703 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 86% | 45,614 psi | 71% | 2874 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 92% | 46,296 psi | 73% | 2871 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,760 psi | 73% | 2766 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,168 psi | 77% | 2877 fps | 99% |
| Winchester StaBALL HD | 55 gr | 80% | 32,039 psi | 50% | 2654 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,305 psi | 62% | 2648 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 72 powders for .270 WSM loaded with the .277 | 140gr | Speer TBBC. Winchester StaBALL HD delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,159 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 1:11.0 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. Winchester StaBALL HD, Norma MRP, Alliant Reloder-26 rank at the top here: for .270 WSM with the .277 | 140gr | Speer TBBC 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.