Load Specifications
Load data in caliber .270 WSM with .277 | 140gr | Frontier BTSP bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Vihtavuori N560.
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% | 54,273 psi | 85% | 2913 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 55,637 psi | 87% | 2953 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,273 psi | 85% | 3045 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 94% | 55,013 psi | 86% | 3041 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 82% | 55,825 psi | 87% | 2897 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,766 psi | 86% | 2982 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 56,260 psi | 88% | 3038 fps | 97.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,630 psi | 75% | 2867 fps | 95.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,062 psi | 67% | 2844 fps | 98.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,085 psi | 86% | 2979 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,085 psi | 86% | 2979 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,551 psi | 90% | 2930 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,810 psi | 86% | 2992 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,188 psi | 88% | 3015 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,505 psi | 85% | 2972 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,275 psi | 88% | 3045 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,014 psi | 89% | 3022 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 3022 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,566 psi | 90% | 3117 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,245 psi | 87% | 3028 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 2953 fps | 97.1% |
| Bofors RP5 | <<locked>> | 96% | 56,275 psi | 88% | 3045 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 57,580 psi | 90% | 2936 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2959 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 56,463 psi | 88% | 2992 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 55,317 psi | 87% | 2940 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 56,304 psi | 88% | 2979 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,230 psi | 87% | 2959 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,666 psi | 87% | 2920 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,967 psi | 81% | 3074 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 56,202 psi | 88% | 3025 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,260 psi | 58% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,143 psi | 86% | 2917 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,172 psi | 86% | 2904 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 55,419 psi | 87% | 2936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,435 psi | 90% | 2959 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 57,377 psi | 90% | 3071 fps | 98% |
| Lovex S065 | <<locked>> | 86% | 56,362 psi | 88% | 2910 fps | 99.9% |
| Lovex S070 | <<locked>> | 86% | 54,621 psi | 86% | 2907 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2930 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 55,680 psi | 87% | 2969 fps | 98.5% |
| Norma 217ᴾ | <<locked>> | 100% | 39,276 psi | 62% | 2785 fps | 96.3% |
| Norma MRP | <<locked>> | 94% | 55,811 psi | 87% | 3068 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 56,782 psi | 89% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,505 psi | 85% | 3031 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 88% | 55,317 psi | 87% | 2979 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,739 psi | 89% | 3035 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,319 psi | 60% | 1893 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,390 psi | 87% | 3002 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,781 psi | 86% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,086 psi | 88% | 3045 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,431 psi | 82% | 3074 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 82% | 56,072 psi | 88% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,362 psi | 88% | 2949 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 92% | 54,331 psi | 85% | 2966 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 57,580 psi | 90% | 2936 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,362 psi | 88% | 2910 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 54,621 psi | 86% | 2907 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,478 psi | 89% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,172 psi | 86% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,709 psi | 87% | 2861 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,334 psi | 90% | 3015 fps | 99% |
| Somchem S355 | <<locked>> | 82% | 55,419 psi | 87% | 2890 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,694 psi | 86% | 2887 fps | 96.7% |
| Somchem S365 | <<locked>> | 90% | 56,985 psi | 89% | 2986 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,361 psi | 87% | 2946 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 56,449 psi | 88% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,013 psi | 86% | 2917 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,740 psi | 90% | 2969 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 86% | 54,607 psi | 86% | 2927 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,811 psi | 89% | 3005 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,651 psi | 87% | 3054 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,985 psi | 88% | 3038 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,725 psi | 90% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,463 psi | 88% | 2992 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,592 psi | 86% | 2930 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% | 35,824 psi | 56% | 2556 fps | 96.6% |
| Accurate 4350 | <<locked>> | 80% | 46,354 psi | 73% | 2795 fps | 99.8% |
| Accurate High Country | <<locked>> | 86% | 44,889 psi | 70% | 2867 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 92% | 51,488 psi | 81% | 2982 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 52,765 psi | 83% | 2848 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,683 psi | 64% | 2703 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 90% | 46,731 psi | 73% | 2861 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 98% | 44,947 psi | 70% | 2812 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 36,318 psi | 57% | 2671 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,089 psi | 64% | 2710 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,089 psi | 64% | 2710 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,520 psi | 85% | 2884 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,352 psi | 68% | 2785 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,342 psi | 77% | 2907 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,698 psi | 64% | 2703 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 41,423 psi | 65% | 2762 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,649 psi | 53% | 2575 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 31,633 psi | 50% | 2533 fps | 95.4% |
| Alliant Reloder-26 | 54.7 gr | 80% | 36,245 psi | 57% | 2707 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 41,118 psi | 64% | 2753 fps | 95.4% |
| Bofors RP30 | <<locked>> | 96% | 43,729 psi | 69% | 2844 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 41,423 psi | 65% | 2762 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 48,559 psi | 76% | 2782 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 43,366 psi | 68% | 2782 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 46,847 psi | 73% | 2822 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 49,269 psi | 77% | 2835 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 49,705 psi | 78% | 2864 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,791 psi | 76% | 2848 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,321 psi | 65% | 2677 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,754 psi | 61% | 2772 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 45,788 psi | 72% | 2841 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 44% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,685 psi | 68% | 2710 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,255 psi | 77% | 2802 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 43,918 psi | 69% | 2736 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 88% | 48,327 psi | 76% | 2802 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 45,020 psi | 71% | 2838 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,718 psi | 75% | 2762 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 46,209 psi | 72% | 2753 fps | 98.4% |
| Lovex S071 | <<locked>> | 82% | 33,359 psi | 52% | 2493 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 43,613 psi | 68% | 2746 fps | 96% |
| Norma 217 | <<locked>> | 98% | 37,028 psi | 58% | 2726 fps | 95.3% |
| Norma MRP | 53.1 gr | 80% | 36,071 psi | 57% | 2661 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 44,933 psi | 70% | 2772 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 45,034 psi | 71% | 2851 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 43,511 psi | 68% | 2762 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 88% | 38,276 psi | 60% | 2677 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,863 psi | 45% | 1693 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,953 psi | 81% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,411 psi | 71% | 2805 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,265 psi | 68% | 2812 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 36,071 psi | 57% | 2697 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 53,026 psi | 83% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,657 psi | 70% | 2736 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 82% | 40,234 psi | 63% | 2694 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 48,559 psi | 76% | 2782 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,718 psi | 75% | 2762 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 46,209 psi | 72% | 2753 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,171 psi | 83% | 2900 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,141 psi | 82% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,688 psi | 73% | 2707 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,871 psi | 62% | 2687 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 52,460 psi | 82% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 48,486 psi | 76% | 2779 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 41,756 psi | 65% | 2736 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,957 psi | 61% | 2628 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 50,241 psi | 79% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,050 psi | 72% | 2762 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 84% | 38,087 psi | 60% | 2605 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 45,716 psi | 72% | 2769 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 37,782 psi | 59% | 2657 fps | 99.1% |
| Vihtavuori N560 | 58.4 gr | 88% | 46,093 psi | 72% | 2874 fps | 95% |
| Vihtavuori N565 | <<locked>> | 94% | 46,412 psi | 73% | 2867 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,730 psi | 70% | 2723 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,036 psi | 74% | 2828 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,545 psi | 48% | 2598 fps | 99.3% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,958 psi | 63% | 2654 fps | 95% |
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 77 powders for .270 WSM loaded with the .277 | 140gr | Frontier BTSP. Winchester StaBALL HD delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,159 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 140.0 gr projectile in 0.277" calls for a 1:8.5 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. Norma MRP, Alliant Reloder-26, Vihtavuori N560 rank at the top here: for .270 WSM with the .277 | 140gr | Frontier BTSP 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.