Load Specifications
Load data in caliber .270 WSM with .277 | 145gr | Hornady ELD-X bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and Norma MRP.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 57,072 psi | 89% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,824 psi | 86% | 2894 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 57,203 psi | 90% | 3051 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 92% | 54,186 psi | 85% | 2989 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 92% | 57,377 psi | 90% | 2982 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 55,013 psi | 86% | 2982 fps | 98% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,038 psi | 78% | 2881 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,136 psi | 71% | 2854 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,346 psi | 85% | 2927 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,406 psi | 90% | 2986 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,114 psi | 86% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,043 psi | 89% | 2972 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,390 psi | 87% | 2989 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,536 psi | 89% | 2966 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 3022 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,087 psi | 89% | 3061 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 54,578 psi | 86% | 2972 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,185 psi | 82% | 2966 fps | 98.2% |
| Bofors RP5 | <<locked>> | 94% | 55,390 psi | 87% | 2989 fps | 99.1% |
| Bofors RP7 | <<locked>> | 84% | 56,405 psi | 88% | 2881 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,592 psi | 86% | 2966 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 84% | 55,187 psi | 86% | 2930 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 57,551 psi | 90% | 2936 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 92% | 55,158 psi | 86% | 2920 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,508 psi | 90% | 2959 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,752 psi | 86% | 2861 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,534 psi | 85% | 3084 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 84% | 55,056 psi | 86% | 2963 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 59% | 1824 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,290 psi | 90% | 2913 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,246 psi | 90% | 2897 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 54,534 psi | 85% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,463 psi | 88% | 2907 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 56,434 psi | 88% | 3015 fps | 98.3% |
| Lovex S065 | <<locked>> | 84% | 55,245 psi | 87% | 2854 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,826 psi | 89% | 2900 fps | 99.8% |
| Lovex S071 | <<locked>> | 98% | 54,737 psi | 86% | 2881 fps | 99.9% |
| Norma 204 | <<locked>> | 86% | 54,694 psi | 86% | 2913 fps | 98.7% |
| Norma 217ᴾ | <<locked>> | 100% | 41,379 psi | 65% | 2799 fps | 97.6% |
| Norma MRP | <<locked>> | 92% | 55,274 psi | 87% | 3015 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 55,840 psi | 88% | 2920 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,261 psi | 90% | 3038 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 86% | 54,389 psi | 85% | 2920 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 55,767 psi | 87% | 2979 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 60% | 1867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,638 psi | 90% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,882 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 3087 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 2976 fps | 96.4% |
| Rottweil R 904 | <<locked>> | 90% | 55,448 psi | 87% | 2897 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 92% | 56,739 psi | 89% | 2963 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 56,405 psi | 88% | 2881 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,245 psi | 87% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,826 psi | 89% | 2900 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,087 psi | 89% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,740 psi | 90% | 2854 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,275 psi | 88% | 2959 fps | 99.2% |
| Somchem S361 | <<locked>> | 90% | 57,000 psi | 89% | 2887 fps | 97.7% |
| Somchem S365 | <<locked>> | 88% | 56,202 psi | 88% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,696 psi | 90% | 2943 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 55,143 psi | 86% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,450 psi | 90% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,869 psi | 89% | 2913 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 86% | 56,898 psi | 89% | 2917 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,318 psi | 88% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,027 psi | 86% | 3002 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 98% | 55,390 psi | 87% | 2989 fps | 98% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,590 psi | 81% | 2972 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,362 psi | 88% | 2861 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,477 psi | 87% | 2933 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,276 psi | 90% | 3104 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,217 psi | 90% | 2930 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% | 37,608 psi | 59% | 2559 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 48,530 psi | 76% | 2792 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 41,669 psi | 65% | 2756 fps | 95% |
| Accurate MAGPRO | <<locked>> | 88% | 47,790 psi | 75% | 2871 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 39,856 psi | 62% | 2648 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 86% | 43,207 psi | 68% | 2753 fps | 95% |
| ADI AR 2217 | <<locked>> | 96% | 44,324 psi | 69% | 2766 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 90% | 34,069 psi | 53% | 2575 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,335 psi | 63% | 2654 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,266 psi | 71% | 2782 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,547 psi | 81% | 2897 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,987 psi | 63% | 2651 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,551 psi | 60% | 2657 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,244 psi | 55% | 2575 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,183 psi | 49% | 2487 fps | 95.9% |
| Alliant Reloder-26 | 55.7 gr | 80% | 38,261 psi | 60% | 2713 fps | 99.1% |
| Bofors RP15 | <<locked>> | 84% | 38,334 psi | 60% | 2651 fps | 95.1% |
| Bofors RP30 | <<locked>> | 92% | 41,002 psi | 64% | 2743 fps | 95.3% |
| Bofors RP5 | <<locked>> | 82% | 38,551 psi | 60% | 2657 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 50,357 psi | 79% | 2776 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 92% | 42,699 psi | 67% | 2736 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 49,023 psi | 77% | 2825 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 51,198 psi | 80% | 2828 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 45,934 psi | 72% | 2756 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,092 psi | 71% | 2740 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,265 psi | 68% | 2671 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 38,319 psi | 60% | 2730 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 48,037 psi | 75% | 2844 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,355 psi | 44% | 1634 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,382 psi | 71% | 2707 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,908 psi | 80% | 2792 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 45,832 psi | 72% | 2733 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,715 psi | 70% | 2694 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 44,266 psi | 69% | 2785 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 49,429 psi | 77% | 2756 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 47,993 psi | 75% | 2749 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 33,141 psi | 52% | 2451 fps | 96.2% |
| Norma 204 | <<locked>> | 80% | 45,411 psi | 71% | 2743 fps | 97% |
| Norma 217 | <<locked>> | 94% | 34,983 psi | 55% | 2635 fps | 95.1% |
| Norma MRP | 54.1 gr | 80% | 37,869 psi | 59% | 2671 fps | 96.6% |
| Norma URP | <<locked>> | 80% | 46,876 psi | 73% | 2769 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 41,495 psi | 65% | 2736 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 45,382 psi | 71% | 2762 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 37,768 psi | 59% | 2631 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,979 psi | 45% | 1673 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,674 psi | 75% | 2805 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,324 psi | 71% | 2812 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 35,476 psi | 56% | 2648 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 47,500 psi | 74% | 2913 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 82% | 43,859 psi | 69% | 2684 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 39,653 psi | 62% | 2641 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 50,357 psi | 79% | 2776 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,429 psi | 77% | 2756 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 47,993 psi | 75% | 2749 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,012 psi | 85% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,385 psi | 76% | 2700 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,291 psi | 62% | 2635 fps | 95.6% |
| Somchem S361 | <<locked>> | 84% | 47,601 psi | 75% | 2726 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 43,888 psi | 69% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,611 psi | 64% | 2631 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 80% | 52,156 psi | 82% | 2756 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,964 psi | 75% | 2756 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 37,478 psi | 59% | 2556 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 47,587 psi | 75% | 2766 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 39,726 psi | 62% | 2657 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 86% | 45,527 psi | 71% | 2825 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 90% | 43,540 psi | 68% | 2769 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 98% | 48,544 psi | 76% | 2917 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,760 psi | 73% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,023 psi | 77% | 2825 fps | 99.1% |
| Winchester StaBALL HD | 53.5 gr | 80% | 31,966 psi | 50% | 2608 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,262 psi | 62% | 2602 fps | 95.4% |
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 | 145gr | Hornady ELD-X. Winchester StaBALL HD delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,104 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 145.0 gr projectile in 0.277" calls for a 1:9.5 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. Alliant Reloder-26, Winchester StaBALL HD, Norma MRP rank at the top here: for .270 WSM with the .277 | 145gr | Hornady ELD-X 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.