Load Specifications
Load data in caliber .270 WSM with .277 | 140gr | Rhino Penetrator bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Winchester StaBALL HD.
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>> | 94% | 55,651 psi | 87% | 2940 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 57,014 psi | 89% | 2976 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,651 psi | 87% | 3074 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 94% | 56,304 psi | 88% | 3068 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 56,797 psi | 89% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,086 psi | 88% | 3009 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 57,435 psi | 90% | 3064 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,834 psi | 77% | 2897 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,990 psi | 69% | 2867 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,463 psi | 88% | 3005 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,130 psi | 88% | 3015 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,522 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,782 psi | 87% | 2999 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,624 psi | 90% | 3068 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,042 psi | 86% | 2992 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,070 psi | 85% | 3041 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,347 psi | 87% | 3084 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,521 psi | 89% | 3048 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,676 psi | 79% | 2986 fps | 97.5% |
| Bofors RP5 | <<locked>> | 96% | 57,624 psi | 90% | 3068 fps | 99.1% |
| Bofors RP7 | <<locked>> | 84% | 55,361 psi | 87% | 2907 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,200 psi | 83% | 2982 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 86% | 57,305 psi | 90% | 3012 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 56,434 psi | 88% | 2963 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 57,551 psi | 90% | 3002 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,507 psi | 89% | 2986 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,956 psi | 89% | 2940 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,098 psi | 83% | 3104 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 57,580 psi | 90% | 3051 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,420 psi | 59% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,188 psi | 88% | 2940 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,028 psi | 88% | 2923 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 56,666 psi | 89% | 2959 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,332 psi | 87% | 2930 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 96% | 55,361 psi | 87% | 3041 fps | 97.8% |
| Lovex S065 | <<locked>> | 86% | 57,493 psi | 90% | 2933 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,767 psi | 87% | 2930 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,724 psi | 89% | 2953 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 57,014 psi | 89% | 2995 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 40,205 psi | 63% | 2812 fps | 96.8% |
| Norma MRP | <<locked>> | 94% | 57,174 psi | 90% | 3091 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 54,636 psi | 86% | 2949 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,985 psi | 88% | 3061 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 88% | 56,681 psi | 89% | 3002 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 54,230 psi | 85% | 2999 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,261 psi | 60% | 1900 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,811 psi | 89% | 3022 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,289 psi | 88% | 2992 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,203 psi | 90% | 3064 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 3104 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 82% | 57,130 psi | 90% | 2920 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,377 psi | 90% | 2972 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 92% | 55,405 psi | 87% | 2986 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 84% | 55,361 psi | 87% | 2907 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,493 psi | 90% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,767 psi | 87% | 2930 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,392 psi | 90% | 2969 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,144 psi | 88% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,681 psi | 89% | 2881 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,955 psi | 86% | 2982 fps | 98.8% |
| Somchem S355 | <<locked>> | 82% | 56,463 psi | 88% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,796 psi | 87% | 2910 fps | 97.1% |
| Somchem S365 | <<locked>> | 88% | 54,839 psi | 86% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,391 psi | 88% | 2966 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 57,435 psi | 90% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,188 psi | 88% | 2936 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,492 psi | 87% | 2940 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 86% | 55,651 psi | 87% | 2946 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,940 psi | 86% | 2979 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,927 psi | 89% | 3077 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,508 psi | 90% | 3068 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,100 psi | 86% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,551 psi | 90% | 3015 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,419 psi | 87% | 3133 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,825 psi | 87% | 2953 fps | 98.7% |
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% | 36,724 psi | 58% | 2579 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 47,442 psi | 74% | 2818 fps | 99.9% |
| Accurate High Country | 57 gr | 84% | 43,279 psi | 68% | 2835 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 90% | 49,661 psi | 78% | 2949 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 53,809 psi | 84% | 2871 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 41,466 psi | 65% | 2726 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 88% | 44,846 psi | 70% | 2825 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 98% | 45,977 psi | 72% | 2841 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 92% | 35,114 psi | 55% | 2641 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,887 psi | 66% | 2730 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,121 psi | 69% | 2805 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,343 psi | 79% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 41,495 psi | 65% | 2723 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 84% | 39,972 psi | 63% | 2733 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,432 psi | 54% | 2598 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,545 psi | 48% | 2503 fps | 95% |
| Alliant Reloder-26 | 55.9 gr | 80% | 37,188 psi | 58% | 2730 fps | 98.5% |
| Bofors RP15 | <<locked>> | 86% | 39,740 psi | 62% | 2723 fps | 95.1% |
| Bofors RP30 | <<locked>> | 94% | 42,279 psi | 66% | 2815 fps | 95.2% |
| Bofors RP5 | <<locked>> | 84% | 39,972 psi | 63% | 2733 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 49,298 psi | 77% | 2799 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 92% | 41,800 psi | 66% | 2753 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 47,747 psi | 75% | 2844 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 50,183 psi | 79% | 2854 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 47,703 psi | 75% | 2831 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,789 psi | 73% | 2815 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,308 psi | 66% | 2697 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 39,595 psi | 62% | 2799 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 46,862 psi | 73% | 2864 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 44% | 1660 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,541 psi | 70% | 2730 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,096 psi | 79% | 2822 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 44,875 psi | 70% | 2759 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 46,470 psi | 73% | 2769 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 90% | 45,890 psi | 72% | 2861 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 48,588 psi | 76% | 2785 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 46,891 psi | 73% | 2772 fps | 98.6% |
| Lovex S071 | <<locked>> | 80% | 32,387 psi | 51% | 2467 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 44,411 psi | 70% | 2766 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 37,956 psi | 59% | 2753 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 36,985 psi | 58% | 2687 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 45,687 psi | 72% | 2792 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 43,192 psi | 68% | 2815 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 44,353 psi | 70% | 2785 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 39,247 psi | 62% | 2703 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,979 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,098 psi | 83% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,601 psi | 73% | 2831 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,280 psi | 69% | 2835 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 36,724 psi | 58% | 2720 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 53,824 psi | 84% | 2871 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 45,426 psi | 71% | 2756 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 38,740 psi | 61% | 2661 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 49,298 psi | 77% | 2799 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,588 psi | 76% | 2785 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 46,891 psi | 73% | 2772 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,186 psi | 85% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,171 psi | 83% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,543 psi | 75% | 2726 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 40,814 psi | 64% | 2710 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 53,519 psi | 84% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 46,630 psi | 73% | 2749 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 42,830 psi | 67% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,755 psi | 62% | 2651 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 80% | 51,010 psi | 80% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,963 psi | 74% | 2782 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 38,798 psi | 61% | 2625 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 46,586 psi | 73% | 2792 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 38,769 psi | 61% | 2677 fps | 99.3% |
| Vihtavuori N560 | <<locked>> | 88% | 47,282 psi | 74% | 2904 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 92% | 44,889 psi | 70% | 2838 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,542 psi | 71% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,022 psi | 75% | 2848 fps | 98.7% |
| Winchester StaBALL HD | 53.7 gr | 80% | 31,227 psi | 49% | 2621 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 84% | 40,727 psi | 64% | 2674 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 75 powders for .270 WSM loaded with the .277 | 140gr | Rhino Penetrator. Winchester StaBALL HD delivers the highest muzzle velocity at 3,133 fps; across all powders the maximum-charge window runs from 1,857 fps to 3,133 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 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, 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. Alliant Reloder-26, Accurate High Country, Winchester StaBALL HD rank at the top here: for .270 WSM with the .277 | 140gr | Rhino Penetrator 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.