Load Specifications
Load data in caliber .270 WSM with .277 | 150gr | Nosler Partition Gold bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Winchester StaBALL HD and Hodgdon Retumbo.
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% | 56,304 psi | 88% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,261 psi | 90% | 2887 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,275 psi | 88% | 2995 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 92% | 57,087 psi | 89% | 2995 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 56,217 psi | 88% | 2923 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 57,740 psi | 90% | 2989 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2887 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,398 psi | 74% | 2864 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,376 psi | 88% | 2927 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,696 psi | 90% | 2940 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,173 psi | 88% | 2917 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,650 psi | 86% | 2933 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,144 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,071 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,362 psi | 88% | 3002 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,680 psi | 87% | 2881 fps | 95.7% |
| Bofors RP15 | <<locked>> | 96% | 57,159 psi | 90% | 2972 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,230 psi | 87% | 2976 fps | 99% |
| Bofors RP5 | <<locked>> | 92% | 54,650 psi | 86% | 2933 fps | 99.3% |
| Bofors RP7 | <<locked>> | 82% | 55,172 psi | 86% | 2822 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2972 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 57,493 psi | 90% | 2927 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,376 psi | 88% | 2881 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 57,595 psi | 90% | 2923 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,492 psi | 89% | 2907 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,392 psi | 90% | 2854 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3094 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,667 psi | 90% | 2963 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,594 psi | 59% | 1804 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,072 psi | 88% | 2854 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,738 psi | 87% | 2835 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 57,087 psi | 89% | 2874 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,129 psi | 86% | 2848 fps | 98% |
| IMR 7828 SSC | <<locked>> | 94% | 55,840 psi | 88% | 2969 fps | 98.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,439 psi | 68% | 2782 fps | 96.4% |
| Lovex S065 | <<locked>> | 84% | 57,334 psi | 90% | 2844 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,709 psi | 87% | 2844 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 57,334 psi | 90% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,058 psi | 89% | 2913 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 43,787 psi | 69% | 2812 fps | 98.6% |
| Norma MRP | <<locked>> | 90% | 54,389 psi | 85% | 2956 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 54,824 psi | 86% | 2861 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,623 psi | 89% | 2992 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 56,913 psi | 89% | 2920 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,926 psi | 86% | 2923 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,667 psi | 61% | 1850 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,666 psi | 89% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,595 psi | 90% | 2976 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,694 psi | 86% | 3038 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,505 psi | 84% | 2986 fps | 97.5% |
| Rottweil R 904 | <<locked>> | 90% | 57,551 psi | 90% | 2894 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 90% | 55,912 psi | 88% | 2910 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 82% | 55,172 psi | 86% | 2822 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,334 psi | 90% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,709 psi | 87% | 2844 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,347 psi | 88% | 2795 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,477 psi | 87% | 2907 fps | 99.3% |
| Somchem S361 | <<locked>> | 88% | 55,724 psi | 87% | 2831 fps | 97.9% |
| Somchem S365 | <<locked>> | 86% | 55,347 psi | 87% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,797 psi | 89% | 2887 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 57,217 psi | 90% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,333 psi | 88% | 2851 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,970 psi | 88% | 2864 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 84% | 55,825 psi | 87% | 2858 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,695 psi | 87% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,624 psi | 90% | 3002 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 96% | 54,824 psi | 86% | 2940 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,592 psi | 86% | 2989 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,201 psi | 87% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,725 psi | 90% | 2930 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,348 psi | 90% | 3051 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,159 psi | 88% | 2877 fps | 99.3% |
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% | 39,421 psi | 62% | 2562 fps | 98.5% |
| Accurate 4350 | <<locked>> | 80% | 50,734 psi | 80% | 2789 fps | 100% |
| Accurate High Country | 55.1 gr | 80% | 41,278 psi | 65% | 2710 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 86% | 47,152 psi | 74% | 2822 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 41,626 psi | 65% | 2654 fps | 96.6% |
| ADI AR 2213 | <<locked>> | 84% | 42,424 psi | 66% | 2700 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 41,147 psi | 64% | 2667 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 88% | 33,750 psi | 53% | 2539 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,181 psi | 74% | 2776 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,998 psi | 85% | 2887 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,785 psi | 65% | 2651 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,956 psi | 59% | 2605 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,912 psi | 58% | 2575 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,619 psi | 51% | 2500 fps | 97.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,277 psi | 63% | 2720 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,576 psi | 82% | 2828 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 37,927 psi | 59% | 2602 fps | 95.5% |
| Bofors RP30 | <<locked>> | 90% | 40,727 psi | 64% | 2703 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 37,956 psi | 59% | 2605 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 52,054 psi | 82% | 2769 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 39,552 psi | 62% | 2635 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,908 psi | 80% | 2818 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 52,924 psi | 83% | 2825 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 45,107 psi | 71% | 2703 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,266 psi | 69% | 2687 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,121 psi | 71% | 2664 fps | 100% |
| Hodgdon Retumbo | 55.7 gr | 84% | 35,752 psi | 56% | 2628 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 50,430 psi | 79% | 2844 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,427 psi | 45% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,224 psi | 74% | 2703 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,620 psi | 82% | 2785 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 47,688 psi | 75% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,874 psi | 69% | 2641 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 41,002 psi | 64% | 2680 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 40,988 psi | 64% | 2726 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 51,140 psi | 80% | 2746 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 49,734 psi | 78% | 2743 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 34,693 psi | 54% | 2451 fps | 97.2% |
| Norma 204 | <<locked>> | 80% | 47,311 psi | 74% | 2746 fps | 97.9% |
| Norma 217 | <<locked>> | 92% | 34,838 psi | 55% | 2602 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 39,769 psi | 62% | 2680 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 48,718 psi | 76% | 2762 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,843 psi | 64% | 2690 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 47,355 psi | 74% | 2759 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 82% | 34,954 psi | 55% | 2530 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,066 psi | 46% | 1654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,908 psi | 78% | 2802 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,355 psi | 74% | 2812 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 33,011 psi | 52% | 2546 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,077 psi | 69% | 2805 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 42,931 psi | 67% | 2628 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 41,495 psi | 65% | 2644 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,054 psi | 82% | 2769 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,140 psi | 80% | 2746 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 49,734 psi | 78% | 2743 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,198 psi | 79% | 2697 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,147 psi | 64% | 2641 fps | 96.7% |
| Somchem S361 | <<locked>> | 80% | 43,816 psi | 69% | 2618 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 46,137 psi | 72% | 2726 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,308 psi | 66% | 2628 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 54,012 psi | 85% | 2743 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,038 psi | 78% | 2753 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,999 psi | 58% | 2510 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 49,574 psi | 78% | 2759 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,553 psi | 65% | 2654 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 42,134 psi | 66% | 2717 fps | 95% |
| Vihtavuori N565 | <<locked>> | 88% | 43,033 psi | 67% | 2720 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 48,037 psi | 75% | 2867 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,689 psi | 76% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,111 psi | 80% | 2822 fps | 99.6% |
| Winchester StaBALL HD | 54.5 gr | 80% | 33,576 psi | 53% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,638 psi | 61% | 2552 fps | 95.8% |
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 | 150gr | Nosler Partition Gold. Hodgdon Retumbo delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,804 fps to 3,094 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 150.0 gr projectile in 0.277" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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. Accurate High Country, Winchester StaBALL HD, Hodgdon Retumbo rank at the top here: for .270 WSM with the .277 | 150gr | Nosler Partition Gold they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 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.