Load Specifications
Load data in caliber .270 WSM with .277 | 154gr | RWS Evolution bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Hodgdon Retumbo and ReloadSwiss RS 76.
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>> | 92% | 57,014 psi | 89% | 2835 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,534 psi | 85% | 2812 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 57,101 psi | 89% | 2972 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 90% | 54,331 psi | 85% | 2917 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 90% | 57,101 psi | 89% | 2900 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 92% | 54,752 psi | 86% | 2907 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,968 psi | 83% | 2867 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,109 psi | 75% | 2848 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,276 psi | 90% | 2900 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,898 psi | 89% | 2894 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,405 psi | 87% | 2910 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,927 psi | 89% | 2887 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,970 psi | 88% | 2946 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,363 psi | 90% | 2979 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,260 psi | 88% | 2861 fps | 96.2% |
| Bofors RP15 | <<locked>> | 94% | 54,650 psi | 86% | 2897 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,869 psi | 88% | 2949 fps | 99.2% |
| Bofors RP5 | <<locked>> | 92% | 55,405 psi | 87% | 2910 fps | 99.5% |
| Bofors RP7 | <<locked>> | 82% | 55,608 psi | 87% | 2792 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 98% | 54,563 psi | 86% | 2897 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 82% | 54,766 psi | 86% | 2848 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 56,884 psi | 89% | 2851 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 90% | 54,868 psi | 86% | 2844 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,246 psi | 90% | 2881 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,621 psi | 86% | 2779 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,868 psi | 86% | 3015 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 82% | 54,781 psi | 86% | 2881 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1781 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,855 psi | 89% | 2831 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,420 psi | 88% | 2812 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 57,653 psi | 90% | 2844 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,970 psi | 88% | 2828 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 94% | 56,623 psi | 89% | 2946 fps | 98.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,106 psi | 69% | 2762 fps | 96.9% |
| Lovex S065 | <<locked>> | 82% | 54,824 psi | 86% | 2772 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,449 psi | 88% | 2822 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,955 psi | 86% | 2805 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,696 psi | 90% | 2887 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 44,411 psi | 70% | 2795 fps | 99% |
| Norma MRP | <<locked>> | 90% | 55,303 psi | 87% | 2936 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 55,666 psi | 87% | 2838 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,290 psi | 90% | 2966 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 57,522 psi | 90% | 2890 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,927 psi | 88% | 2904 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,624 psi | 61% | 1824 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,334 psi | 90% | 2881 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,665 psi | 86% | 2897 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,448 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,578 psi | 86% | 2969 fps | 98% |
| Rottweil R 904 | <<locked>> | 88% | 55,056 psi | 86% | 2818 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 90% | 56,608 psi | 89% | 2887 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 82% | 55,608 psi | 87% | 2792 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,824 psi | 86% | 2772 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,449 psi | 88% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,116 psi | 90% | 2772 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,159 psi | 88% | 2881 fps | 99.5% |
| Somchem S361 | <<locked>> | 88% | 56,362 psi | 88% | 2808 fps | 98.2% |
| Somchem S365 | <<locked>> | 86% | 56,318 psi | 88% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,537 psi | 90% | 2861 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 84% | 57,159 psi | 90% | 2825 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,695 psi | 89% | 2838 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 84% | 56,362 psi | 88% | 2831 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,449 psi | 88% | 2871 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,853 psi | 86% | 2923 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 96% | 55,637 psi | 87% | 2917 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,347 psi | 87% | 2966 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,811 psi | 87% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,056 psi | 86% | 2851 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,462 psi | 85% | 2976 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,898 psi | 89% | 2854 fps | 99.5% |
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% | 39,914 psi | 63% | 2539 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 51,300 psi | 80% | 2759 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 41,829 psi | 66% | 2687 fps | 96% |
| Accurate MAGPRO | <<locked>> | 84% | 44,889 psi | 70% | 2740 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 42,047 psi | 66% | 2631 fps | 97.1% |
| ADI AR 2213 | <<locked>> | 82% | 40,422 psi | 63% | 2625 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 92% | 41,669 psi | 65% | 2648 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 86% | 32,358 psi | 51% | 2470 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,906 psi | 75% | 2753 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,279 psi | 66% | 2631 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,638 psi | 61% | 2589 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,492 psi | 59% | 2556 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,953 psi | 52% | 2480 fps | 97.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,089 psi | 64% | 2703 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,084 psi | 83% | 2808 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 36,347 psi | 57% | 2536 fps | 95.2% |
| Bofors RP30 | <<locked>> | 88% | 38,972 psi | 61% | 2628 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 38,638 psi | 61% | 2589 fps | 96.2% |
| Bofors RP7 | <<locked>> | 80% | 52,678 psi | 83% | 2746 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 86% | 37,768 psi | 59% | 2559 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 51,648 psi | 81% | 2795 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 53,679 psi | 84% | 2799 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 82% | 42,989 psi | 67% | 2628 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,192 psi | 66% | 2612 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,818 psi | 72% | 2641 fps | 100% |
| Hodgdon Retumbo | 55.4 gr | 84% | 36,361 psi | 57% | 2615 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 51,068 psi | 80% | 2822 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 45% | 1591 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,630 psi | 75% | 2677 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,272 psi | 83% | 2759 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 48,428 psi | 76% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,800 psi | 66% | 2569 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 84% | 41,669 psi | 65% | 2664 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,291 psi | 62% | 2657 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 51,764 psi | 81% | 2723 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,386 psi | 79% | 2720 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 35,244 psi | 55% | 2434 fps | 97.7% |
| Norma 204 | <<locked>> | 80% | 47,819 psi | 75% | 2720 fps | 98.2% |
| Norma 217 | <<locked>> | 90% | 33,446 psi | 52% | 2530 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 40,292 psi | 63% | 2657 fps | 98.1% |
| Norma URP | <<locked>> | 80% | 49,458 psi | 78% | 2740 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,986 psi | 61% | 2615 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 47,877 psi | 75% | 2733 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 33,315 psi | 52% | 2457 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 46% | 1631 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,502 psi | 79% | 2776 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,979 psi | 75% | 2789 fps | 100% |
| ReloadSwiss RS 76 | 57.8 gr | 82% | 33,446 psi | 52% | 2536 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,701 psi | 70% | 2789 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 43,468 psi | 68% | 2608 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 80% | 41,989 psi | 66% | 2621 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 80% | 52,678 psi | 83% | 2746 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,764 psi | 81% | 2723 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,386 psi | 79% | 2720 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,575 psi | 79% | 2671 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,626 psi | 65% | 2615 fps | 97.1% |
| Somchem S361 | <<locked>> | 80% | 44,251 psi | 69% | 2595 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 46,688 psi | 73% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,931 psi | 67% | 2608 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 80% | 50,546 psi | 79% | 2723 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,405 psi | 59% | 2487 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 80% | 50,256 psi | 79% | 2736 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,279 psi | 66% | 2635 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 42,844 psi | 67% | 2697 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 86% | 41,205 psi | 65% | 2648 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 94% | 45,832 psi | 72% | 2795 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,284 psi | 77% | 2680 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,924 psi | 81% | 2799 fps | 99.7% |
| Winchester StaBALL HD | 54.1 gr | 80% | 34,011 psi | 53% | 2602 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,131 psi | 61% | 2533 fps | 96.2% |
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 76 powders for .270 WSM loaded with the .277 | 154gr | RWS Evolution. Hodgdon Retumbo delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,781 fps to 3,015 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 154.0 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 2218, ADI AR 2225 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, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .270 WSM with the .277 | 154gr | RWS Evolution they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-33, Alliant Reloder-50 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.