Load Specifications
Load data in caliber .270 WSM with .277 | 150gr | Berger VLD Hunting 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, Vihtavuori N560 and Accurate MAGPRO.
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% | 55,956 psi | 88% | 2884 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 53,766 psi | 84% | 2867 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,476 psi | 85% | 2976 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 55,274 psi | 87% | 2831 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,737 psi | 86% | 2923 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 55,970 psi | 88% | 2982 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,717 psi | 73% | 2808 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,597 psi | 65% | 2769 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,710 psi | 89% | 2927 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,507 psi | 89% | 2854 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,621 psi | 86% | 2923 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,782 psi | 87% | 2940 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,740 psi | 90% | 2966 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,724 psi | 87% | 2976 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,724 psi | 89% | 2946 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,431 psi | 82% | 2953 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,276 psi | 90% | 3041 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,665 psi | 86% | 2956 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 57,696 psi | 90% | 2871 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,530 psi | 76% | 2884 fps | 97.8% |
| Bofors RP5 | <<locked>> | 96% | 55,724 psi | 87% | 2976 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 56,608 psi | 89% | 2871 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,590 psi | 81% | 2904 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 86% | 55,579 psi | 87% | 2923 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 54,795 psi | 86% | 2877 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 56,101 psi | 88% | 2920 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,969 psi | 86% | 2904 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,911 psi | 86% | 2844 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,329 psi | 80% | 3012 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 56,043 psi | 88% | 2959 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,985 psi | 58% | 1801 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,433 psi | 85% | 2854 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,708 psi | 86% | 2841 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 54,360 psi | 85% | 2864 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,246 psi | 90% | 2907 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 98% | 57,435 psi | 90% | 3015 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 55,100 psi | 86% | 2838 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,637 psi | 89% | 2884 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,432 psi | 84% | 2851 fps | 100% |
| Norma 204 | <<locked>> | 88% | 55,274 psi | 87% | 2907 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 37,202 psi | 58% | 2690 fps | 96.7% |
| Norma MRP | <<locked>> | 94% | 55,579 psi | 87% | 2999 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 55,927 psi | 88% | 2904 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,201 psi | 85% | 2972 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 54,694 psi | 86% | 2910 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,478 psi | 89% | 2972 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 59% | 1844 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,435 psi | 90% | 2881 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,187 psi | 86% | 2923 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,508 psi | 90% | 2946 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,753 psi | 87% | 2976 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,938 psi | 81% | 3012 fps | 100% |
| Rottweil R 903 | <<locked>> | 82% | 54,259 psi | 85% | 2818 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,912 psi | 88% | 2890 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 94% | 57,130 psi | 90% | 2953 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 56,608 psi | 89% | 2871 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,100 psi | 86% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,637 psi | 89% | 2884 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,811 psi | 87% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,505 psi | 85% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,534 psi | 85% | 2795 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,681 psi | 89% | 2949 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 57,479 psi | 90% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,566 psi | 90% | 2884 fps | 98.2% |
| Somchem S365 | <<locked>> | 90% | 56,043 psi | 88% | 2907 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,041 psi | 85% | 2871 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 55,187 psi | 86% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,172 psi | 85% | 2844 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,145 psi | 90% | 2904 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 56,956 psi | 89% | 2904 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,579 psi | 87% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,506 psi | 87% | 2992 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,926 psi | 86% | 2966 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,566 psi | 90% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,854 psi | 88% | 2927 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,809 psi | 84% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,969 psi | 85% | 2864 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% | 32,706 psi | 51% | 2444 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 43,947 psi | 69% | 2703 fps | 99.9% |
| Accurate MAGPRO | 63 gr | 90% | 47,297 psi | 74% | 2848 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 51,924 psi | 81% | 2779 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,218 psi | 61% | 2628 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 88% | 42,830 psi | 67% | 2736 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 96% | 40,944 psi | 64% | 2687 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 34,258 psi | 54% | 2585 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,076 psi | 66% | 2657 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,098 psi | 83% | 2805 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,090 psi | 66% | 2707 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,588 psi | 76% | 2831 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,738 psi | 58% | 2569 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,217 psi | 58% | 2621 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,285 psi | 49% | 2474 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,225 psi | 46% | 2431 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,910 psi | 53% | 2602 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 36,941 psi | 58% | 2612 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 54,157 psi | 85% | 2822 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 39,494 psi | 62% | 2703 fps | 95.3% |
| Bofors RP5 | <<locked>> | 84% | 37,217 psi | 58% | 2621 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 46,876 psi | 73% | 2707 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 39,349 psi | 62% | 2654 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 45,701 psi | 72% | 2753 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 48,341 psi | 76% | 2766 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 45,832 psi | 72% | 2743 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,889 psi | 70% | 2726 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,798 psi | 62% | 2595 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,985 psi | 58% | 2690 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 44,875 psi | 70% | 2769 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 44% | 1611 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,395 psi | 66% | 2638 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,370 psi | 76% | 2736 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 41,785 psi | 65% | 2648 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,454 psi | 70% | 2680 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 88% | 41,046 psi | 64% | 2710 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 45,759 psi | 72% | 2680 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 44,135 psi | 69% | 2671 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 30,081 psi | 47% | 2375 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 42,235 psi | 66% | 2671 fps | 96.6% |
| Norma 217 | <<locked>> | 98% | 34,853 psi | 55% | 2631 fps | 95.7% |
| Norma MRP | 55 gr | 80% | 33,997 psi | 53% | 2569 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 43,149 psi | 68% | 2690 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 40,785 psi | 64% | 2717 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 42,003 psi | 66% | 2684 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 88% | 36,376 psi | 57% | 2595 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 1650 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,766 psi | 84% | 2825 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,576 psi | 81% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,758 psi | 69% | 2720 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,003 psi | 66% | 2736 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,895 psi | 53% | 2605 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 50,865 psi | 80% | 2766 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,582 psi | 64% | 2608 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 38,493 psi | 60% | 2608 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 46,876 psi | 73% | 2707 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,759 psi | 72% | 2680 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 44,135 psi | 69% | 2671 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,170 psi | 82% | 2825 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,140 psi | 80% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,846 psi | 70% | 2631 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,159 psi | 60% | 2605 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 50,691 psi | 79% | 2762 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,193 psi | 69% | 2654 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 40,030 psi | 63% | 2648 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,637 psi | 57% | 2536 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 80% | 48,588 psi | 76% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,628 psi | 70% | 2687 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 36,071 psi | 57% | 2520 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 43,918 psi | 69% | 2687 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 35,230 psi | 55% | 2552 fps | 99.1% |
| Vihtavuori N560 | 60.5 gr | 88% | 45,194 psi | 71% | 2805 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 92% | 41,901 psi | 66% | 2726 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,613 psi | 68% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,701 psi | 72% | 2753 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,789 psi | 44% | 2477 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,290 psi | 60% | 2575 fps | 95.6% |
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 | 150gr | Berger VLD Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,041 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 150.0 gr projectile in 0.277" calls for a 1:10.5 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, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .270 WSM with the .277 | 150gr | Berger VLD Hunting 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.