Load Specifications
Load data in caliber .270 WSM with .277 | 145gr | Fox Classic Hunter bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 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>> | 96% | 56,724 psi | 89% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,607 psi | 86% | 2900 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 57,174 psi | 90% | 3054 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 94% | 54,404 psi | 85% | 2995 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 82% | 55,317 psi | 87% | 2851 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,331 psi | 85% | 2936 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 96% | 55,782 psi | 87% | 2995 fps | 98% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,166 psi | 74% | 2828 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,206 psi | 66% | 2795 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,853 psi | 86% | 2940 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,853 psi | 86% | 2940 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,898 psi | 89% | 2881 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,375 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,767 psi | 87% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,450 psi | 90% | 2982 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,695 psi | 87% | 2995 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,521 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,330 psi | 82% | 2976 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,942 psi | 89% | 3064 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,679 psi | 86% | 2979 fps | 98.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,689 psi | 76% | 2910 fps | 97.3% |
| Bofors RP5 | <<locked>> | 96% | 55,695 psi | 87% | 2995 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 56,913 psi | 89% | 2894 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,648 psi | 81% | 2917 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 55,840 psi | 88% | 2946 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 54,824 psi | 86% | 2897 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 55,883 psi | 88% | 2936 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,737 psi | 86% | 2917 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,100 psi | 86% | 2874 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,314 psi | 80% | 3028 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 55,767 psi | 87% | 2979 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,231 psi | 58% | 1818 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,578 psi | 86% | 2874 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,665 psi | 86% | 2861 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 54,636 psi | 86% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,000 psi | 89% | 2917 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 98% | 57,217 psi | 90% | 3031 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 55,622 psi | 87% | 2864 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,174 psi | 90% | 2910 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 2881 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,230 psi | 87% | 2927 fps | 98.7% |
| Norma 217ᴾ | <<locked>> | 100% | 38,116 psi | 60% | 2726 fps | 96.3% |
| Norma MRP | <<locked>> | 94% | 55,274 psi | 87% | 3022 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 56,188 psi | 88% | 2933 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,954 psi | 85% | 2989 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 88% | 54,781 psi | 86% | 2933 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,159 psi | 88% | 2989 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,058 psi | 60% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,653 psi | 90% | 2904 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,969 psi | 86% | 2953 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,317 psi | 85% | 2923 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,651 psi | 87% | 2999 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,764 psi | 81% | 3028 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 82% | 55,114 psi | 86% | 2851 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,869 psi | 88% | 2907 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 57,246 psi | 90% | 2976 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 56,913 psi | 89% | 2894 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,622 psi | 87% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,174 psi | 90% | 2910 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,898 psi | 88% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,636 psi | 86% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,853 psi | 86% | 2815 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,826 psi | 89% | 2972 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 54,636 psi | 86% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,725 psi | 90% | 2900 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 56,362 psi | 88% | 2936 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,563 psi | 86% | 2897 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 84% | 55,738 psi | 87% | 2815 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,389 psi | 85% | 2867 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,188 psi | 90% | 2923 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 57,203 psi | 90% | 2927 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,173 psi | 88% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,129 psi | 86% | 3009 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 2992 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,276 psi | 90% | 2881 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,840 psi | 88% | 2946 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,985 psi | 89% | 3107 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,653 psi | 90% | 2940 fps | 99.1% |
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% | 34,432 psi | 54% | 2497 fps | 96.5% |
| Accurate 4350 | <<locked>> | 80% | 45,208 psi | 71% | 2743 fps | 99.8% |
| Accurate High Country | <<locked>> | 86% | 44,034 psi | 69% | 2818 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 90% | 47,601 psi | 75% | 2874 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 52,286 psi | 82% | 2805 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,914 psi | 63% | 2657 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 46,021 psi | 72% | 2815 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 44,208 psi | 69% | 2769 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 35,404 psi | 55% | 2621 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,263 psi | 63% | 2661 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,263 psi | 63% | 2661 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,780 psi | 84% | 2835 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,656 psi | 67% | 2740 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,704 psi | 76% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,929 psi | 63% | 2654 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,043 psi | 60% | 2654 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,561 psi | 51% | 2520 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,516 psi | 48% | 2477 fps | 95.3% |
| Alliant Reloder-26 | 54.8 gr | 80% | 35,099 psi | 55% | 2648 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 40,234 psi | 63% | 2703 fps | 95.6% |
| Bofors RP30 | <<locked>> | 96% | 42,815 psi | 67% | 2792 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 38,043 psi | 60% | 2654 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 47,776 psi | 75% | 2736 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 42,511 psi | 67% | 2736 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 46,050 psi | 72% | 2776 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 48,675 psi | 76% | 2789 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 46,093 psi | 72% | 2762 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,124 psi | 75% | 2802 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,451 psi | 63% | 2625 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,811 psi | 59% | 2723 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 45,092 psi | 71% | 2792 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 44% | 1624 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,917 psi | 67% | 2661 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,646 psi | 76% | 2756 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 42,917 psi | 67% | 2687 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,904 psi | 70% | 2703 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 44,251 psi | 69% | 2792 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 46,775 psi | 73% | 2713 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 45,266 psi | 71% | 2707 fps | 98.5% |
| Lovex S071 | <<locked>> | 82% | 31,894 psi | 50% | 2431 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 42,888 psi | 67% | 2697 fps | 96.2% |
| Norma 217 | <<locked>> | 98% | 35,853 psi | 56% | 2671 fps | 95.4% |
| Norma MRP | 53.2 gr | 80% | 34,998 psi | 55% | 2608 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 44,063 psi | 69% | 2723 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 44,208 psi | 69% | 2805 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 42,728 psi | 67% | 2717 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 37,231 psi | 58% | 2625 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,317 psi | 85% | 2851 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,459 psi | 81% | 2900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,498 psi | 70% | 2753 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,482 psi | 67% | 2762 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,954 psi | 55% | 2641 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,040 psi | 82% | 2805 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,932 psi | 69% | 2690 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 39,349 psi | 62% | 2641 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 47,776 psi | 75% | 2736 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,775 psi | 73% | 2713 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 45,266 psi | 71% | 2707 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,576 psi | 82% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,517 psi | 81% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,774 psi | 72% | 2661 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,001 psi | 61% | 2638 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 51,590 psi | 81% | 2795 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,747 psi | 75% | 2736 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 40,828 psi | 64% | 2684 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,855 psi | 59% | 2579 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 49,458 psi | 78% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,266 psi | 71% | 2717 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 37,115 psi | 58% | 2556 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 44,802 psi | 70% | 2720 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 36,535 psi | 57% | 2598 fps | 99.1% |
| Vihtavuori N560 | 58.5 gr | 88% | 45,353 psi | 71% | 2828 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 94% | 45,658 psi | 72% | 2822 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,034 psi | 69% | 2677 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,325 psi | 73% | 2779 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,312 psi | 46% | 2536 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,059 psi | 61% | 2605 fps | 95.2% |
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 78 powders for .270 WSM loaded with the .277 | 145gr | Fox Classic Hunter. Winchester StaBALL HD delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,107 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 145.0 gr projectile in 0.277" calls for a 1:9.0 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .270 WSM with the .277 | 145gr | Fox Classic Hunter 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.