Load Specifications
Load data in caliber .270 WSM with .276 | 150gr | Frontier PH HPBT bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP 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% | 54,375 psi | 85% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,506 psi | 87% | 2858 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,302 psi | 85% | 2956 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 92% | 54,998 psi | 86% | 2956 fps | 97.4% |
| ADI AR 2209 | <<locked>> | 90% | 54,520 psi | 85% | 2890 fps | 99% |
| ADI AR 2213 | <<locked>> | 94% | 55,738 psi | 87% | 2946 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,517 psi | 79% | 2848 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,832 psi | 72% | 2828 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,665 psi | 86% | 2894 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,970 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,653 psi | 90% | 2933 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,072 psi | 88% | 2953 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,319 psi | 90% | 2927 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 2986 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,012 psi | 85% | 2966 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,334 psi | 90% | 2900 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 55,347 psi | 87% | 2936 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,881 psi | 83% | 2930 fps | 98.5% |
| Bofors RP5 | <<locked>> | 94% | 56,072 psi | 88% | 2953 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 56,985 psi | 89% | 2841 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,187 psi | 86% | 2933 fps | 99% |
| Hodgdon H414 | <<locked>> | 84% | 55,956 psi | 88% | 2894 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 54,853 psi | 86% | 2844 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 92% | 55,811 psi | 87% | 2887 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,766 psi | 86% | 2871 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,506 psi | 87% | 2822 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,419 psi | 87% | 3054 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 55,738 psi | 87% | 2927 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 59% | 1788 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,752 psi | 86% | 2825 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,566 psi | 90% | 2854 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 55,274 psi | 87% | 2841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,971 psi | 89% | 2871 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 96% | 57,276 psi | 90% | 2986 fps | 98.7% |
| Lovex S065 | <<locked>> | 84% | 55,811 psi | 87% | 2815 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,508 psi | 90% | 2864 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 55,390 psi | 87% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,463 psi | 87% | 2877 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 41,887 psi | 66% | 2769 fps | 98% |
| Norma MRP | <<locked>> | 92% | 56,159 psi | 88% | 2979 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 56,579 psi | 89% | 2881 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,491 psi | 85% | 2949 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 86% | 55,172 psi | 86% | 2884 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,594 psi | 89% | 2943 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,566 psi | 60% | 1837 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,853 psi | 86% | 2874 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,796 psi | 87% | 2946 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 3051 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,314 psi | 80% | 2940 fps | 96.8% |
| Rottweil R 904 | <<locked>> | 90% | 55,898 psi | 88% | 2858 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 57,696 psi | 90% | 2930 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 56,985 psi | 89% | 2841 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,811 psi | 87% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,508 psi | 90% | 2864 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,027 psi | 86% | 2766 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,217 psi | 90% | 2927 fps | 99.4% |
| Somchem S361 | <<locked>> | 90% | 57,696 psi | 90% | 2854 fps | 98% |
| Somchem S365 | <<locked>> | 88% | 56,826 psi | 89% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,216 psi | 87% | 2858 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 55,680 psi | 87% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,723 psi | 86% | 2818 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,551 psi | 90% | 2881 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 57,638 psi | 90% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,246 psi | 90% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,753 psi | 87% | 2966 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 98% | 56,086 psi | 88% | 2956 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,286 psi | 82% | 2943 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,188 psi | 90% | 2825 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,956 psi | 88% | 2894 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,578 psi | 86% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,157 psi | 85% | 2838 fps | 98.9% |
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% | 38,058 psi | 60% | 2526 fps | 98% |
| Accurate 4350 | <<locked>> | 80% | 49,052 psi | 77% | 2753 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 42,322 psi | 66% | 2726 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 86% | 45,397 psi | 71% | 2779 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 40,451 psi | 63% | 2621 fps | 96.1% |
| ADI AR 2213 | <<locked>> | 86% | 43,772 psi | 69% | 2723 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 94% | 42,250 psi | 66% | 2680 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 90% | 34,418 psi | 54% | 2549 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,774 psi | 72% | 2746 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,301 psi | 82% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,480 psi | 63% | 2618 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,825 psi | 58% | 2575 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,708 psi | 56% | 2546 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,676 psi | 50% | 2464 fps | 96.6% |
| Alliant Reloder-26 | 55 gr | 80% | 38,856 psi | 61% | 2684 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,056 psi | 85% | 2844 fps | 95.1% |
| Bofors RP15 | <<locked>> | 84% | 38,856 psi | 61% | 2621 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 39,131 psi | 61% | 2661 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 36,825 psi | 58% | 2575 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 50,807 psi | 80% | 2740 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 40,727 psi | 64% | 2651 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 49,603 psi | 78% | 2789 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 80% | 51,706 psi | 81% | 2792 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 46,383 psi | 73% | 2720 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,730 psi | 72% | 2710 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,888 psi | 69% | 2638 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 36,724 psi | 58% | 2648 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 48,791 psi | 76% | 2812 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 44% | 1601 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,050 psi | 72% | 2674 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,387 psi | 81% | 2753 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 46,369 psi | 73% | 2697 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 45,252 psi | 71% | 2664 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 42,279 psi | 66% | 2700 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 49,879 psi | 78% | 2717 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 48,443 psi | 76% | 2713 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 33,663 psi | 53% | 2425 fps | 96.7% |
| Norma 204 | <<locked>> | 80% | 45,963 psi | 72% | 2710 fps | 97.4% |
| Norma 217 | <<locked>> | 94% | 35,433 psi | 56% | 2612 fps | 95.8% |
| Norma MRP | 53.4 gr | 80% | 38,435 psi | 60% | 2644 fps | 97.2% |
| Norma URP | <<locked>> | 80% | 47,384 psi | 74% | 2733 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 42,177 psi | 66% | 2713 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 45,963 psi | 72% | 2726 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 84% | 36,027 psi | 56% | 2549 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,095 psi | 46% | 1644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,370 psi | 76% | 2769 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,977 psi | 72% | 2779 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 33,953 psi | 53% | 2569 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 45,165 psi | 71% | 2822 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 41,771 psi | 65% | 2595 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 40,103 psi | 63% | 2608 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 50,807 psi | 80% | 2740 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,879 psi | 78% | 2717 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 48,443 psi | 76% | 2713 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,805 psi | 76% | 2664 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,755 psi | 62% | 2602 fps | 96.1% |
| Somchem S361 | <<locked>> | 82% | 45,150 psi | 71% | 2638 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 44,628 psi | 70% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,147 psi | 64% | 2598 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 52,678 psi | 83% | 2717 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,501 psi | 76% | 2720 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,737 psi | 56% | 2474 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,124 psi | 75% | 2726 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,190 psi | 63% | 2621 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 84% | 43,352 psi | 68% | 2736 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 90% | 44,106 psi | 69% | 2740 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 98% | 49,211 psi | 77% | 2884 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,166 psi | 74% | 2677 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,603 psi | 78% | 2789 fps | 99.4% |
| Winchester StaBALL HD | 52.8 gr | 80% | 32,430 psi | 51% | 2582 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,434 psi | 59% | 2520 fps | 95.1% |
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 .276 | 150gr | Frontier PH HPBT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,054 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,054 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 0.276" calls for a 1:9.0 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, Norma MRP, Alliant Reloder-26 rank at the top here: for .270 WSM with the .276 | 150gr | Frontier PH HPBT 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.