Load Specifications
Load data in caliber .270 WSM with .277 | 150gr | NorthFork Bonded Core 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, Accurate MAGPRO and Alliant Reloder-26.
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% | 55,201 psi | 87% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,260 psi | 88% | 2867 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 55,811 psi | 87% | 2969 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 90% | 55,390 psi | 87% | 2907 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 56,478 psi | 89% | 2963 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,387 psi | 81% | 2867 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,427 psi | 73% | 2844 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,347 psi | 87% | 2907 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,637 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,158 psi | 86% | 2897 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,971 psi | 89% | 2966 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,969 psi | 86% | 2894 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2999 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,143 psi | 86% | 2982 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 56,130 psi | 88% | 2953 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,911 psi | 84% | 2949 fps | 98.7% |
| Bofors RP5 | <<locked>> | 94% | 56,971 psi | 89% | 2966 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 57,580 psi | 90% | 2854 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,101 psi | 88% | 2949 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 56,550 psi | 89% | 2907 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 55,463 psi | 87% | 2858 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 92% | 56,579 psi | 89% | 2900 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,506 psi | 87% | 2884 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,159 psi | 88% | 2835 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,173 psi | 88% | 3068 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 56,594 psi | 89% | 2943 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,536 psi | 59% | 1795 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,245 psi | 87% | 2838 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,129 psi | 86% | 2818 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 55,898 psi | 88% | 2854 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,740 psi | 90% | 2884 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 94% | 54,520 psi | 85% | 2943 fps | 98.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,554 psi | 67% | 2759 fps | 96% |
| Lovex S065 | <<locked>> | 84% | 56,405 psi | 88% | 2825 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,868 psi | 86% | 2825 fps | 99.8% |
| Lovex S071 | <<locked>> | 98% | 56,260 psi | 88% | 2858 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,941 psi | 88% | 2890 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 42,728 psi | 67% | 2789 fps | 98.3% |
| Norma MRP | <<locked>> | 92% | 56,971 psi | 89% | 2992 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 57,217 psi | 90% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,317 psi | 87% | 2963 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 86% | 55,767 psi | 87% | 2897 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,551 psi | 90% | 2963 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,406 psi | 60% | 1837 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,506 psi | 87% | 2887 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,420 psi | 88% | 2956 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3071 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 2963 fps | 97.2% |
| Rottweil R 904 | <<locked>> | 90% | 56,739 psi | 89% | 2874 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 90% | 54,868 psi | 86% | 2887 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 57,580 psi | 90% | 2854 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,405 psi | 88% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,868 psi | 86% | 2825 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,550 psi | 87% | 2776 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,418 psi | 85% | 2884 fps | 99.2% |
| Somchem S361 | <<locked>> | 88% | 54,839 psi | 86% | 2812 fps | 97.6% |
| Somchem S365 | <<locked>> | 86% | 54,331 psi | 85% | 2851 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,811 psi | 87% | 2867 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 56,304 psi | 88% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,419 psi | 87% | 2831 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,940 psi | 86% | 2844 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 84% | 54,926 psi | 86% | 2841 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,505 psi | 85% | 2877 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,623 psi | 89% | 2986 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 98% | 57,072 psi | 89% | 2969 fps | 98.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,229 psi | 83% | 2963 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,128 psi | 85% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,840 psi | 89% | 2910 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,709 psi | 87% | 3031 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,926 psi | 86% | 2851 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% | 38,653 psi | 61% | 2543 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 49,806 psi | 78% | 2766 fps | 100% |
| Accurate MAGPRO | 59.2 gr | 86% | 46,122 psi | 72% | 2795 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 40,828 psi | 64% | 2631 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 41,742 psi | 65% | 2680 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 94% | 42,786 psi | 67% | 2697 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 88% | 33,069 psi | 52% | 2513 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,441 psi | 73% | 2759 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,982 psi | 83% | 2871 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,002 psi | 64% | 2631 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,391 psi | 59% | 2589 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,245 psi | 57% | 2559 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,981 psi | 50% | 2477 fps | 96.8% |
| Alliant Reloder-26 | 55.7 gr | 80% | 39,465 psi | 62% | 2700 fps | 99.5% |
| Bofors RP15 | <<locked>> | 82% | 37,144 psi | 58% | 2582 fps | 95.1% |
| Bofors RP30 | <<locked>> | 90% | 39,784 psi | 62% | 2677 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 37,391 psi | 59% | 2589 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 51,401 psi | 81% | 2753 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 88% | 38,928 psi | 61% | 2612 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 50,241 psi | 79% | 2802 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 52,272 psi | 82% | 2805 fps | 99% |
| Hodgdon H4831 | <<locked>> | 84% | 44,164 psi | 69% | 2680 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,540 psi | 68% | 2667 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,396 psi | 70% | 2648 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 37,130 psi | 58% | 2661 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 49,385 psi | 77% | 2825 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,427 psi | 45% | 1608 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,412 psi | 73% | 2684 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,953 psi | 81% | 2769 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 46,978 psi | 74% | 2710 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,134 psi | 68% | 2625 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 86% | 42,743 psi | 67% | 2713 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 98% | 40,161 psi | 63% | 2703 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 50,488 psi | 79% | 2730 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,849 psi | 77% | 2723 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 34,069 psi | 53% | 2434 fps | 96.9% |
| Norma 204 | <<locked>> | 80% | 46,528 psi | 73% | 2723 fps | 97.6% |
| Norma 217 | <<locked>> | 92% | 34,084 psi | 53% | 2575 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 38,957 psi | 61% | 2657 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 47,848 psi | 75% | 2743 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,176 psi | 63% | 2671 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 46,557 psi | 73% | 2740 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 36,434 psi | 57% | 2562 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,066 psi | 46% | 1647 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,979 psi | 77% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,543 psi | 73% | 2792 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 34,345 psi | 54% | 2582 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 45,716 psi | 72% | 2835 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 42,308 psi | 66% | 2612 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,683 psi | 64% | 2621 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 51,401 psi | 81% | 2753 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,488 psi | 79% | 2730 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,849 psi | 77% | 2723 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,414 psi | 77% | 2677 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,364 psi | 63% | 2618 fps | 96.4% |
| Somchem S361 | <<locked>> | 82% | 45,803 psi | 72% | 2654 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 45,165 psi | 71% | 2707 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,655 psi | 65% | 2612 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 53,084 psi | 83% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,139 psi | 77% | 2733 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,260 psi | 57% | 2487 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 48,733 psi | 76% | 2743 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,886 psi | 64% | 2638 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 84% | 44,092 psi | 69% | 2753 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 88% | 42,105 psi | 66% | 2697 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 96% | 46,963 psi | 74% | 2844 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,950 psi | 75% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,241 psi | 79% | 2802 fps | 99.5% |
| Winchester StaBALL HD | 53.5 gr | 80% | 32,880 psi | 52% | 2598 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,913 psi | 59% | 2533 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 70 powders for .270 WSM loaded with the .277 | 150gr | NorthFork Bonded Core. ReloadSwiss RS 76 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,795 fps to 3,071 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 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 1:10.0 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. Winchester StaBALL HD, Accurate MAGPRO, Alliant Reloder-26 rank at the top here: for .270 WSM with the .277 | 150gr | NorthFork Bonded Core 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.