Load Specifications
Load data in caliber .270 WSM with .277 | 140gr | Barnes X BT bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Hodgdon Retumbo 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>> | 90% | 57,232 psi | 90% | 2927 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 56,202 psi | 88% | 3051 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 90% | 56,666 psi | 89% | 3045 fps | 97.1% |
| ADI AR 2209 | <<locked>> | 88% | 55,492 psi | 87% | 2972 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 92% | 56,782 psi | 89% | 3031 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,172 psi | 86% | 2992 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 2979 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,057 psi | 88% | 2972 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,057 psi | 88% | 2972 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,840 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,521 psi | 87% | 2966 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,696 psi | 90% | 3045 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,883 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,781 psi | 86% | 3025 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,999 psi | 88% | 3064 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 57,029 psi | 89% | 3031 fps | 99% |
| Bofors RP30 | <<locked>> | 98% | 55,259 psi | 87% | 3035 fps | 98.4% |
| Bofors RP5 | <<locked>> | 92% | 57,696 psi | 90% | 3045 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 98% | 56,521 psi | 89% | 3015 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 57,188 psi | 90% | 2979 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 56,724 psi | 89% | 2966 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,985 psi | 88% | 2953 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,043 psi | 89% | 2910 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,840 psi | 89% | 3143 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 82% | 56,623 psi | 89% | 3009 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,145 psi | 60% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,651 psi | 87% | 2904 fps | 99.4% |
| IMR 4831 | <<locked>> | 84% | 57,014 psi | 89% | 2933 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,667 psi | 90% | 2949 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 92% | 55,245 psi | 87% | 3015 fps | 97.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,152 psi | 74% | 2904 fps | 96.6% |
| Lovex S065 | <<locked>> | 82% | 57,290 psi | 90% | 2900 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,956 psi | 88% | 2900 fps | 99.7% |
| Lovex S071 | <<locked>> | 94% | 55,637 psi | 87% | 2904 fps | 99.9% |
| Norma 204 | <<locked>> | 84% | 56,347 psi | 88% | 2956 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 47,790 psi | 75% | 2943 fps | 98.8% |
| Norma MRP | <<locked>> | 90% | 57,667 psi | 90% | 3071 fps | 99.8% |
| Norma URP | <<locked>> | 82% | 54,853 psi | 86% | 2920 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,782 psi | 87% | 3031 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 84% | 56,449 psi | 88% | 2972 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 94% | 54,752 psi | 86% | 2979 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,059 psi | 61% | 1906 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,695 psi | 89% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,739 psi | 89% | 3028 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,566 psi | 90% | 3143 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,072 psi | 89% | 3100 fps | 97.4% |
| Rottweil R 904 | <<locked>> | 88% | 56,869 psi | 89% | 2936 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 88% | 55,854 psi | 88% | 2966 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,290 psi | 90% | 2900 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,956 psi | 88% | 2900 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,405 psi | 88% | 2848 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,405 psi | 87% | 2959 fps | 98.9% |
| Somchem S361 | <<locked>> | 86% | 55,492 psi | 87% | 2881 fps | 97.2% |
| Somchem S365 | <<locked>> | 84% | 55,535 psi | 87% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,898 psi | 89% | 2943 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 82% | 56,101 psi | 88% | 2904 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,666 psi | 87% | 2913 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 82% | 55,767 psi | 87% | 2917 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,637 psi | 89% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,029 psi | 89% | 3054 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 94% | 55,419 psi | 87% | 3002 fps | 97.7% |
| Vihtavuori N568 | <<locked>> | 98% | 54,563 psi | 86% | 3041 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,592 psi | 86% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,188 psi | 90% | 2979 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,405 psi | 88% | 3117 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,724 psi | 87% | 2923 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% | 44,222 psi | 69% | 2694 fps | 98.9% |
| Accurate High Country | <<locked>> | 80% | 45,005 psi | 71% | 2835 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 84% | 47,863 psi | 75% | 2881 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 44,701 psi | 70% | 2762 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 45,556 psi | 71% | 2812 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 44,541 psi | 70% | 2779 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 84% | 34,258 psi | 54% | 2579 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,281 psi | 71% | 2769 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,281 psi | 71% | 2769 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,980 psi | 78% | 2884 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,947 psi | 70% | 2762 fps | 96.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,655 psi | 65% | 2733 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,741 psi | 64% | 2703 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,506 psi | 57% | 2635 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,382 psi | 70% | 2854 fps | 99.8% |
| Bofors RP15 | <<locked>> | 80% | 39,508 psi | 62% | 2680 fps | 95.2% |
| Bofors RP30 | <<locked>> | 88% | 42,293 psi | 66% | 2776 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 41,655 psi | 65% | 2733 fps | 96.1% |
| Hodgdon H1000 | <<locked>> | 88% | 43,004 psi | 67% | 2749 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 53,969 psi | 85% | 2927 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 84% | 47,964 psi | 75% | 2808 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 47,297 psi | 74% | 2792 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,646 psi | 76% | 2776 fps | 100% |
| Hodgdon Retumbo | 54 gr | 82% | 37,637 psi | 59% | 2707 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 53,461 psi | 84% | 2956 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,761 psi | 45% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,024 psi | 78% | 2805 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 51,329 psi | 80% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 46,804 psi | 73% | 2746 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 44,324 psi | 69% | 2795 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 96% | 42,786 psi | 67% | 2808 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 54,404 psi | 85% | 2854 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 53,171 psi | 83% | 2851 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 39,494 psi | 62% | 2592 fps | 98% |
| Norma 204 | <<locked>> | 80% | 50,314 psi | 79% | 2851 fps | 97.8% |
| Norma 217 | <<locked>> | 88% | 35,592 psi | 56% | 2648 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 43,598 psi | 68% | 2805 fps | 98% |
| Norma URP | <<locked>> | 80% | 52,040 psi | 82% | 2874 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 44,425 psi | 70% | 2808 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 50,502 psi | 79% | 2871 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 37,014 psi | 58% | 2612 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,646 psi | 46% | 1706 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,548 psi | 84% | 2917 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,372 psi | 79% | 2923 fps | 100% |
| ReloadSwiss RS 76 | 56.4 gr | 80% | 35,288 psi | 55% | 2638 fps | 95.3% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 48,008 psi | 75% | 2930 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 45,890 psi | 72% | 2733 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 45,034 psi | 71% | 2762 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,404 psi | 85% | 2854 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 53,171 psi | 83% | 2851 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,476 psi | 84% | 2799 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,643 psi | 70% | 2756 fps | 96.9% |
| Somchem S361 | <<locked>> | 80% | 47,094 psi | 74% | 2726 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 49,734 psi | 78% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,108 psi | 72% | 2746 fps | 98% |
| Vihtavuori N160 | <<locked>> | 80% | 53,185 psi | 83% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 40,625 psi | 64% | 2628 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 80% | 52,895 psi | 83% | 2867 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 45,948 psi | 72% | 2782 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 45,571 psi | 71% | 2835 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 86% | 44,672 psi | 70% | 2795 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 96% | 51,459 psi | 81% | 2982 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,547 psi | 81% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,157 psi | 85% | 2927 fps | 99.5% |
| Winchester StaBALL HD | 54.1 gr | 80% | 37,753 psi | 59% | 2769 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,192 psi | 66% | 2671 fps | 96.1% |
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 66 powders for .270 WSM loaded with the .277 | 140gr | Barnes X BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,143 fps. ADI AR 2217 gives the best case fill at 100 %, and 66 of the 66 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 140.0 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, Hodgdon TrailBoss 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, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .270 WSM with the .277 | 140gr | Barnes X BT 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.