Load Specifications
Load data in caliber .270 WSM with .277 | 150gr | Brenneke TOG 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 ReloadSwiss RS 76.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 56,231 psi | 88% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,305 psi | 90% | 2887 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,246 psi | 88% | 2995 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 92% | 57,072 psi | 89% | 2995 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 56,159 psi | 88% | 2923 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 92% | 54,099 psi | 85% | 2927 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 2887 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,340 psi | 74% | 2867 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,405 psi | 88% | 2927 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,740 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,202 psi | 88% | 2920 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,694 psi | 86% | 2936 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,927 psi | 88% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,100 psi | 86% | 2972 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,347 psi | 88% | 3002 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,709 psi | 87% | 2884 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 57,188 psi | 90% | 2972 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 2972 fps | 98.9% |
| Bofors RP5 | <<locked>> | 92% | 54,694 psi | 86% | 2936 fps | 99.3% |
| Bofors RP7 | <<locked>> | 82% | 55,158 psi | 86% | 2822 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 2972 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 57,522 psi | 90% | 2927 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,405 psi | 88% | 2881 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 57,580 psi | 90% | 2923 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,521 psi | 89% | 2907 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,116 psi | 90% | 2851 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,334 psi | 90% | 3094 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,696 psi | 90% | 2963 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,594 psi | 59% | 1804 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,101 psi | 88% | 2858 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,695 psi | 87% | 2835 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 56,797 psi | 89% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,158 psi | 86% | 2851 fps | 98% |
| IMR 7828 SSC | <<locked>> | 94% | 55,869 psi | 88% | 2969 fps | 98.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,482 psi | 68% | 2782 fps | 96.4% |
| Lovex S065 | <<locked>> | 84% | 57,276 psi | 90% | 2844 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,738 psi | 87% | 2844 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 57,261 psi | 90% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,087 psi | 89% | 2913 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 43,627 psi | 68% | 2812 fps | 98.6% |
| Norma MRP | <<locked>> | 90% | 54,418 psi | 85% | 2959 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 54,853 psi | 86% | 2861 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,405 psi | 88% | 2986 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 56,840 psi | 89% | 2917 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,969 psi | 86% | 2927 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,682 psi | 61% | 1850 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,376 psi | 88% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,566 psi | 90% | 2979 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,433 psi | 85% | 3031 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2986 fps | 97.5% |
| Rottweil R 904 | <<locked>> | 90% | 57,479 psi | 90% | 2890 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 90% | 55,956 psi | 88% | 2910 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 82% | 55,158 psi | 86% | 2822 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,276 psi | 90% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,738 psi | 87% | 2844 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,362 psi | 88% | 2795 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,506 psi | 87% | 2907 fps | 99.3% |
| Somchem S361 | <<locked>> | 88% | 55,709 psi | 87% | 2835 fps | 97.9% |
| Somchem S365 | <<locked>> | 86% | 55,376 psi | 87% | 2871 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,826 psi | 89% | 2887 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 57,246 psi | 90% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,275 psi | 88% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,898 psi | 88% | 2864 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 84% | 55,767 psi | 87% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,738 psi | 87% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,653 psi | 90% | 3005 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 96% | 54,766 psi | 86% | 2940 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 2989 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,187 psi | 86% | 2805 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,186 psi | 85% | 2874 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,348 psi | 90% | 3054 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,202 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% | 39,450 psi | 62% | 2562 fps | 98.5% |
| Accurate 4350 | <<locked>> | 80% | 50,763 psi | 80% | 2789 fps | 100% |
| Accurate High Country | 55.1 gr | 80% | 41,220 psi | 65% | 2707 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 86% | 47,137 psi | 74% | 2822 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 41,640 psi | 65% | 2654 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 42,453 psi | 67% | 2703 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 41,176 psi | 65% | 2667 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 88% | 33,620 psi | 53% | 2536 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,195 psi | 74% | 2776 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,027 psi | 85% | 2887 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,814 psi | 66% | 2654 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,971 psi | 60% | 2608 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,869 psi | 58% | 2575 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,648 psi | 51% | 2500 fps | 97.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,277 psi | 63% | 2720 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,518 psi | 82% | 2828 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 37,913 psi | 59% | 2602 fps | 95.5% |
| Bofors RP30 | <<locked>> | 90% | 40,756 psi | 64% | 2703 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 37,971 psi | 60% | 2608 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 52,083 psi | 82% | 2769 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 39,552 psi | 62% | 2635 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,937 psi | 80% | 2818 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 52,953 psi | 83% | 2825 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 45,092 psi | 71% | 2703 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,295 psi | 69% | 2687 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,107 psi | 71% | 2664 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 35,781 psi | 56% | 2628 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 50,459 psi | 79% | 2844 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,427 psi | 45% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,239 psi | 74% | 2703 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,605 psi | 82% | 2785 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 47,718 psi | 75% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,903 psi | 69% | 2644 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 41,031 psi | 64% | 2680 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,017 psi | 64% | 2726 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 51,169 psi | 80% | 2746 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 49,763 psi | 78% | 2743 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 34,679 psi | 54% | 2451 fps | 97.2% |
| Norma 204 | <<locked>> | 80% | 47,340 psi | 74% | 2746 fps | 97.9% |
| Norma 217 | <<locked>> | 92% | 34,679 psi | 54% | 2595 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 39,798 psi | 62% | 2680 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 48,733 psi | 76% | 2762 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,872 psi | 64% | 2690 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 47,384 psi | 74% | 2759 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 82% | 34,983 psi | 55% | 2530 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,066 psi | 46% | 1654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,937 psi | 78% | 2802 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,384 psi | 74% | 2812 fps | 100% |
| ReloadSwiss RS 76 | 58.2 gr | 82% | 33,040 psi | 52% | 2549 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 46,963 psi | 74% | 2864 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 42,917 psi | 67% | 2628 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 41,524 psi | 65% | 2644 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,083 psi | 82% | 2769 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,169 psi | 80% | 2746 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 49,763 psi | 78% | 2743 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,241 psi | 79% | 2697 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,162 psi | 65% | 2641 fps | 96.7% |
| Somchem S361 | <<locked>> | 80% | 43,801 psi | 69% | 2621 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 46,166 psi | 72% | 2726 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,337 psi | 66% | 2631 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 53,998 psi | 85% | 2743 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,067 psi | 78% | 2753 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,014 psi | 58% | 2510 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 49,559 psi | 78% | 2759 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,582 psi | 65% | 2654 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 42,119 psi | 66% | 2717 fps | 95% |
| Vihtavuori N565 | <<locked>> | 88% | 43,018 psi | 67% | 2720 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 48,022 psi | 75% | 2871 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,704 psi | 76% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,140 psi | 80% | 2822 fps | 99.6% |
| Winchester StaBALL HD | 54.5 gr | 80% | 33,591 psi | 53% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,667 psi | 61% | 2556 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 | Brenneke TOG. 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 1:10.5 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, ReloadSwiss RS 76 rank at the top here: for .270 WSM with the .277 | 150gr | Brenneke TOG 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.