Load Specifications
Load data in caliber .270 WSM with .277 | 145gr | Reichenberg HDB Universal bullet and 72 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% | 54,505 psi | 85% | 2877 fps | 99.9% |
| Accurate 4350 | <<locked>> | 84% | 55,492 psi | 87% | 2907 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,418 psi | 85% | 3009 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 92% | 55,158 psi | 86% | 3009 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 90% | 54,491 psi | 85% | 2940 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 94% | 55,767 psi | 87% | 2999 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 2897 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,905 psi | 72% | 2877 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,911 psi | 86% | 2940 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,911 psi | 86% | 2940 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,897 psi | 86% | 2953 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,869 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,317 psi | 85% | 2933 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,202 psi | 88% | 3005 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,348 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 3038 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,172 psi | 85% | 3018 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 55,376 psi | 87% | 2989 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 2982 fps | 98.3% |
| Bofors RP5 | <<locked>> | 94% | 56,202 psi | 88% | 3005 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 57,014 psi | 89% | 2894 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2986 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 84% | 55,840 psi | 88% | 2946 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 54,853 psi | 86% | 2897 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 92% | 55,941 psi | 88% | 2940 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,911 psi | 86% | 2923 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,680 psi | 87% | 2877 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3104 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 55,811 psi | 87% | 2979 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1831 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,607 psi | 86% | 2874 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,563 psi | 86% | 2858 fps | 99.6% |
| IMR 4831 | <<locked>> | 86% | 55,434 psi | 87% | 2897 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,927 psi | 89% | 2920 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 96% | 57,537 psi | 90% | 3038 fps | 98.6% |
| Lovex S065 | <<locked>> | 84% | 55,869 psi | 88% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,464 psi | 90% | 2917 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 55,521 psi | 87% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,477 psi | 87% | 2930 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 42,076 psi | 66% | 2818 fps | 97.9% |
| Norma MRP | <<locked>> | 92% | 56,159 psi | 88% | 3031 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 56,449 psi | 88% | 2933 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,476 psi | 85% | 2995 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 86% | 55,187 psi | 86% | 2936 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,811 psi | 89% | 2999 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,377 psi | 60% | 1873 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,621 psi | 86% | 2923 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,753 psi | 87% | 2995 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 3107 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 2992 fps | 96.7% |
| Rottweil R 904 | <<locked>> | 90% | 55,927 psi | 88% | 2910 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 92% | 57,609 psi | 90% | 2979 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 57,014 psi | 89% | 2894 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,869 psi | 88% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,464 psi | 90% | 2917 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,940 psi | 86% | 2815 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,145 psi | 90% | 2976 fps | 99.3% |
| Somchem S361 | <<locked>> | 90% | 57,653 psi | 90% | 2904 fps | 97.9% |
| Somchem S365 | <<locked>> | 88% | 56,913 psi | 89% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,201 psi | 87% | 2907 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 55,782 psi | 87% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,723 psi | 86% | 2871 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,609 psi | 90% | 2930 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 57,740 psi | 90% | 2933 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,188 psi | 90% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,811 psi | 87% | 3018 fps | 97.9% |
| Vihtavuori N565 | <<locked>> | 98% | 56,173 psi | 88% | 3002 fps | 98.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2992 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,072 psi | 89% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,086 psi | 88% | 2946 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,534 psi | 85% | 3068 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,273 psi | 85% | 2887 fps | 98.8% |
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% | 38,130 psi | 60% | 2572 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 49,168 psi | 77% | 2805 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 42,250 psi | 66% | 2772 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 88% | 48,573 psi | 76% | 2890 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 40,379 psi | 63% | 2664 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 86% | 43,656 psi | 68% | 2766 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 94% | 42,322 psi | 66% | 2726 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 90% | 34,563 psi | 54% | 2595 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,872 psi | 64% | 2671 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,872 psi | 64% | 2671 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,716 psi | 72% | 2792 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,533 psi | 82% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,553 psi | 64% | 2664 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 82% | 39,102 psi | 61% | 2674 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,636 psi | 56% | 2589 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,589 psi | 50% | 2503 fps | 96.2% |
| Alliant Reloder-26 | 56.4 gr | 80% | 38,798 psi | 61% | 2730 fps | 99.2% |
| Bofors RP15 | <<locked>> | 84% | 38,870 psi | 61% | 2667 fps | 95.4% |
| Bofors RP30 | <<locked>> | 92% | 41,669 psi | 65% | 2762 fps | 95.6% |
| Bofors RP5 | <<locked>> | 82% | 39,102 psi | 61% | 2674 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 50,720 psi | 79% | 2789 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 40,669 psi | 64% | 2694 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 49,661 psi | 78% | 2838 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 51,764 psi | 81% | 2844 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 46,398 psi | 73% | 2769 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,571 psi | 71% | 2753 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,918 psi | 69% | 2687 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 36,637 psi | 57% | 2687 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 48,820 psi | 77% | 2861 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,326 psi | 44% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,963 psi | 72% | 2720 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,532 psi | 81% | 2805 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 46,282 psi | 73% | 2743 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 45,208 psi | 71% | 2710 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 86% | 42,380 psi | 66% | 2749 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 49,806 psi | 78% | 2766 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 48,385 psi | 76% | 2759 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 33,533 psi | 53% | 2461 fps | 96.4% |
| Norma 204 | <<locked>> | 80% | 45,992 psi | 72% | 2759 fps | 97.2% |
| Norma 217 | <<locked>> | 94% | 35,389 psi | 55% | 2651 fps | 95.4% |
| Norma MRP | 54.8 gr | 80% | 38,392 psi | 60% | 2687 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 47,282 psi | 74% | 2779 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 42,177 psi | 66% | 2759 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 45,992 psi | 72% | 2776 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 84% | 36,042 psi | 56% | 2592 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,950 psi | 45% | 1677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,385 psi | 76% | 2818 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,847 psi | 72% | 2828 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 33,924 psi | 53% | 2608 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 48,109 psi | 75% | 2927 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 82% | 44,237 psi | 69% | 2697 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 40,190 psi | 63% | 2654 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 50,720 psi | 79% | 2789 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,806 psi | 78% | 2766 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 48,385 psi | 76% | 2759 fps | 99.2% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,979 psi | 77% | 2717 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,842 psi | 62% | 2651 fps | 95.9% |
| Somchem S361 | <<locked>> | 82% | 45,266 psi | 71% | 2687 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 44,527 psi | 70% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,176 psi | 65% | 2644 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 52,620 psi | 82% | 2766 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,573 psi | 76% | 2772 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,810 psi | 56% | 2516 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 48,124 psi | 75% | 2779 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 40,364 psi | 63% | 2674 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 86% | 46,253 psi | 72% | 2841 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 44,222 psi | 69% | 2785 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 98% | 49,168 psi | 77% | 2933 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,253 psi | 74% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,661 psi | 78% | 2838 fps | 99.2% |
| Winchester StaBALL HD | 54.2 gr | 80% | 32,430 psi | 51% | 2628 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,769 psi | 62% | 2618 fps | 95.7% |
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 | Reichenberg HDB Universal. ReloadSwiss RS 76 delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,107 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 1:10.0 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, Norma MRP, Alliant Reloder-26 rank at the top here: for .270 WSM with the .277 | 145gr | Reichenberg HDB Universal 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.