Load Specifications
Load data in caliber .270 WSM with .277 | 150gr | Hornady InterLock bullet and 69 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 76, Hodgdon Retumbo 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>> | 90% | 54,766 psi | 86% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,724 psi | 87% | 2874 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 55,666 psi | 87% | 2979 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 88% | 54,882 psi | 86% | 2910 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 92% | 56,217 psi | 88% | 2972 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,215 psi | 85% | 2933 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 2910 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,245 psi | 87% | 2910 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,187 psi | 86% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,723 psi | 86% | 2904 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,840 psi | 89% | 2976 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,737 psi | 86% | 2897 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,246 psi | 90% | 3009 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,158 psi | 86% | 2989 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,334 psi | 90% | 2923 fps | 96.4% |
| Bofors RP15 | <<locked>> | 94% | 56,057 psi | 88% | 2963 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,595 psi | 90% | 3018 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 56,840 psi | 89% | 2976 fps | 99.6% |
| Bofors RP7 | <<locked>> | 82% | 56,507 psi | 89% | 2854 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 98% | 55,898 psi | 88% | 2963 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 82% | 55,840 psi | 88% | 2910 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 56,072 psi | 88% | 2910 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,071 psi | 86% | 2894 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,782 psi | 87% | 2838 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,318 psi | 88% | 3084 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,086 psi | 88% | 2946 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1821 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,418 psi | 85% | 2838 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,246 psi | 90% | 2867 fps | 99.9% |
| IMR 4831 | <<locked>> | 84% | 55,492 psi | 87% | 2858 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,869 psi | 89% | 2890 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 92% | 54,433 psi | 85% | 2953 fps | 98.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,397 psi | 71% | 2828 fps | 97.2% |
| Lovex S065 | <<locked>> | 82% | 55,709 psi | 87% | 2831 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,261 psi | 90% | 2877 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,231 psi | 88% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,303 psi | 87% | 2894 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 45,701 psi | 72% | 2858 fps | 99.1% |
| Norma MRP | <<locked>> | 90% | 56,768 psi | 89% | 2999 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,536 psi | 89% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,071 psi | 86% | 2976 fps | 99% |
| Ramshot Hunter | <<locked>> | 84% | 55,230 psi | 87% | 2897 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,551 psi | 90% | 2972 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,595 psi | 60% | 1864 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,085 psi | 86% | 2887 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,043 psi | 88% | 2959 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,014 psi | 89% | 3081 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3038 fps | 98.2% |
| Rottweil R 904 | <<locked>> | 88% | 55,898 psi | 88% | 2877 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 88% | 54,520 psi | 85% | 2897 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 82% | 56,507 psi | 89% | 2854 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,709 psi | 87% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,261 psi | 90% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,665 psi | 86% | 2779 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,508 psi | 90% | 2946 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 57,580 psi | 90% | 2874 fps | 98.4% |
| Somchem S365 | <<locked>> | 86% | 57,464 psi | 90% | 2904 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,317 psi | 87% | 2874 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 82% | 54,752 psi | 86% | 2835 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,549 psi | 85% | 2851 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 84% | 57,551 psi | 90% | 2894 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,711 psi | 90% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,275 psi | 88% | 2992 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 96% | 57,101 psi | 89% | 2982 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 3035 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,043 psi | 89% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,115 psi | 88% | 2913 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,449 psi | 88% | 3041 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,404 psi | 85% | 2858 fps | 99.2% |
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% | 40,785 psi | 64% | 2598 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 52,402 psi | 82% | 2822 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 46,108 psi | 72% | 2805 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 42,931 psi | 67% | 2690 fps | 97.2% |
| ADI AR 2213 | <<locked>> | 82% | 41,321 psi | 65% | 2684 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 90% | 40,248 psi | 63% | 2657 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 86% | 32,982 psi | 52% | 2523 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,468 psi | 68% | 2694 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,776 psi | 76% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,076 psi | 68% | 2687 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,450 psi | 62% | 2648 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,276 psi | 60% | 2608 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,692 psi | 53% | 2536 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,061 psi | 66% | 2759 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,969 psi | 85% | 2864 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 37,014 psi | 58% | 2589 fps | 95.4% |
| Bofors RP30 | <<locked>> | 88% | 39,958 psi | 63% | 2687 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 39,450 psi | 62% | 2648 fps | 96.4% |
| Bofors RP7 | <<locked>> | 80% | 53,432 psi | 84% | 2802 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 86% | 38,580 psi | 60% | 2618 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 52,576 psi | 82% | 2854 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 82% | 43,859 psi | 69% | 2687 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 82% | 43,134 psi | 68% | 2671 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,644 psi | 73% | 2697 fps | 100% |
| Hodgdon Retumbo | 56.3 gr | 82% | 34,998 psi | 55% | 2615 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 52,431 psi | 82% | 2887 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,456 psi | 45% | 1627 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,515 psi | 76% | 2736 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,186 psi | 85% | 2822 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 49,400 psi | 77% | 2759 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,583 psi | 67% | 2625 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 82% | 40,030 psi | 63% | 2664 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 96% | 40,364 psi | 63% | 2717 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 52,547 psi | 82% | 2779 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,068 psi | 80% | 2776 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 35,868 psi | 56% | 2487 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 48,878 psi | 77% | 2782 fps | 98.4% |
| Norma 217 | <<locked>> | 90% | 34,258 psi | 54% | 2589 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 41,292 psi | 65% | 2717 fps | 98.3% |
| Norma URP | <<locked>> | 80% | 50,227 psi | 79% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 39,813 psi | 62% | 2674 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 48,979 psi | 77% | 2795 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 34,040 psi | 53% | 2513 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,283 psi | 46% | 1670 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,619 psi | 81% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,182 psi | 77% | 2851 fps | 100% |
| ReloadSwiss RS 76 | 58.8 gr | 80% | 32,271 psi | 51% | 2533 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 45,977 psi | 72% | 2851 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 44,135 psi | 69% | 2664 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 80% | 42,888 psi | 67% | 2680 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 80% | 53,432 psi | 84% | 2802 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,547 psi | 82% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,068 psi | 80% | 2776 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,445 psi | 81% | 2730 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,525 psi | 67% | 2677 fps | 97.3% |
| Somchem S361 | <<locked>> | 80% | 45,237 psi | 71% | 2657 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 47,790 psi | 75% | 2756 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,758 psi | 69% | 2667 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 80% | 51,503 psi | 81% | 2782 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,189 psi | 60% | 2543 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 80% | 51,126 psi | 80% | 2792 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,120 psi | 68% | 2687 fps | 100% |
| Vihtavuori N560 | 58.4 gr | 82% | 43,772 psi | 69% | 2756 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 86% | 42,192 psi | 66% | 2707 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 94% | 47,094 psi | 74% | 2858 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,343 psi | 79% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,750 psi | 83% | 2858 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,867 psi | 55% | 2661 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,016 psi | 63% | 2589 fps | 96.5% |
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 69 powders for .270 WSM loaded with the .277 | 150gr | Hornady InterLock. Hodgdon Retumbo delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,084 fps. ADI AR 2217 gives the best case fill at 100 %, and 69 of the 69 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 150.0 gr projectile in 0.277" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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. ReloadSwiss RS 76, Hodgdon Retumbo, Vihtavuori N560 rank at the top here: for .270 WSM with the .277 | 150gr | Hornady InterLock 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.