Load Specifications
Load data in caliber .270 WSM with .277 | 150gr | Rhino Penetrator bullet and 73 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 Vihtavuori N560.
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% | 57,479 psi | 90% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,114 psi | 86% | 2848 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 57,711 psi | 90% | 3012 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 92% | 54,665 psi | 86% | 2946 fps | 97.3% |
| ADI AR 2209 | <<locked>> | 92% | 57,682 psi | 90% | 2940 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 55,405 psi | 87% | 2940 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,256 psi | 79% | 2841 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,614 psi | 71% | 2822 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,824 psi | 86% | 2884 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,824 psi | 86% | 2884 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,520 psi | 85% | 2890 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,622 psi | 87% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,377 psi | 90% | 2927 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,811 psi | 87% | 2946 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,913 psi | 89% | 2920 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 2979 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,508 psi | 90% | 3015 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 55,042 psi | 86% | 2930 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,562 psi | 82% | 2923 fps | 98.4% |
| Bofors RP5 | <<locked>> | 94% | 55,811 psi | 87% | 2946 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 56,884 psi | 89% | 2835 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,926 psi | 86% | 2923 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 84% | 55,564 psi | 87% | 2887 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 54,549 psi | 85% | 2838 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 92% | 55,506 psi | 87% | 2877 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,708 psi | 86% | 2867 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,390 psi | 87% | 2818 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,129 psi | 86% | 3048 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 55,405 psi | 87% | 2920 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 59% | 1788 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,711 psi | 90% | 2867 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,450 psi | 90% | 2851 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 55,187 psi | 86% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,666 psi | 89% | 2864 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 56,927 psi | 89% | 2976 fps | 98.6% |
| Lovex S065 | <<locked>> | 84% | 55,738 psi | 87% | 2808 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,188 psi | 90% | 2858 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 55,303 psi | 87% | 2838 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,100 psi | 86% | 2871 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 41,626 psi | 65% | 2759 fps | 97.9% |
| Norma MRP | <<locked>> | 92% | 55,796 psi | 87% | 2972 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 56,202 psi | 88% | 2874 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,157 psi | 85% | 2940 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 86% | 54,853 psi | 86% | 2877 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,318 psi | 88% | 2936 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,566 psi | 60% | 1834 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,447 psi | 85% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,448 psi | 87% | 2940 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,811 psi | 87% | 3045 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 2933 fps | 96.7% |
| Rottweil R 904 | <<locked>> | 90% | 55,608 psi | 87% | 2851 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 92% | 57,334 psi | 90% | 2923 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 56,884 psi | 89% | 2835 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,738 psi | 87% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,188 psi | 90% | 2858 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,406 psi | 90% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,955 psi | 86% | 2762 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,927 psi | 89% | 2920 fps | 99.4% |
| Somchem S361 | <<locked>> | 90% | 57,406 psi | 90% | 2848 fps | 97.9% |
| Somchem S365 | <<locked>> | 88% | 56,724 psi | 89% | 2881 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,926 psi | 86% | 2848 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 55,550 psi | 87% | 2756 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,404 psi | 85% | 2812 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,334 psi | 90% | 2874 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 57,261 psi | 90% | 2874 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,840 psi | 89% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,506 psi | 87% | 2963 fps | 98% |
| Vihtavuori N565 | <<locked>> | 98% | 55,796 psi | 87% | 2946 fps | 98.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 2933 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,927 psi | 89% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,854 psi | 88% | 2890 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,201 psi | 85% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,682 psi | 90% | 2890 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% | 37,956 psi | 59% | 2523 fps | 98% |
| Accurate 4350 | <<locked>> | 80% | 48,965 psi | 77% | 2749 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 41,974 psi | 66% | 2717 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 88% | 48,138 psi | 75% | 2831 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 40,219 psi | 63% | 2612 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 86% | 43,540 psi | 68% | 2713 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 42,003 psi | 66% | 2674 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 90% | 34,389 psi | 54% | 2549 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,669 psi | 64% | 2618 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,669 psi | 64% | 2618 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,629 psi | 72% | 2743 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,170 psi | 82% | 2854 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,350 psi | 63% | 2612 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,812 psi | 61% | 2618 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,563 psi | 56% | 2539 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,459 psi | 49% | 2457 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,580 psi | 60% | 2677 fps | 99.3% |
| Bofors RP15 | <<locked>> | 84% | 38,754 psi | 61% | 2615 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 41,234 psi | 65% | 2707 fps | 95.7% |
| Bofors RP5 | <<locked>> | 82% | 38,812 psi | 61% | 2618 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 50,705 psi | 79% | 2736 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 40,495 psi | 63% | 2644 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 49,269 psi | 77% | 2779 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 51,387 psi | 81% | 2785 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 46,311 psi | 73% | 2717 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,440 psi | 71% | 2700 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,584 psi | 68% | 2631 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 36,506 psi | 57% | 2638 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 48,443 psi | 76% | 2802 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 44% | 1598 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,730 psi | 72% | 2664 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,285 psi | 80% | 2749 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 46,224 psi | 72% | 2690 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,991 psi | 71% | 2654 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 86% | 42,032 psi | 66% | 2694 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 49,777 psi | 78% | 2713 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 48,167 psi | 75% | 2707 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 33,373 psi | 52% | 2415 fps | 96.6% |
| Norma 204 | <<locked>> | 80% | 45,861 psi | 72% | 2707 fps | 97.3% |
| Norma 217 | <<locked>> | 94% | 35,230 psi | 55% | 2602 fps | 95.6% |
| Norma MRP | 53.1 gr | 80% | 38,145 psi | 60% | 2635 fps | 97% |
| Norma URP | <<locked>> | 80% | 47,007 psi | 74% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 41,858 psi | 66% | 2703 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 45,847 psi | 72% | 2723 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 84% | 35,737 psi | 56% | 2539 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,051 psi | 46% | 1640 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,037 psi | 75% | 2762 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,600 psi | 71% | 2772 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 33,736 psi | 53% | 2559 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 47,674 psi | 75% | 2871 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 41,669 psi | 65% | 2592 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 39,972 psi | 63% | 2602 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 50,705 psi | 79% | 2736 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,777 psi | 78% | 2713 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 48,167 psi | 75% | 2707 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,288 psi | 85% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,762 psi | 76% | 2661 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,624 psi | 62% | 2598 fps | 96% |
| Somchem S361 | <<locked>> | 82% | 45,107 psi | 71% | 2635 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 44,324 psi | 69% | 2690 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,828 psi | 64% | 2592 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 52,315 psi | 82% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,356 psi | 76% | 2717 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,621 psi | 56% | 2470 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 48,008 psi | 75% | 2723 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,118 psi | 63% | 2618 fps | 99.7% |
| Vihtavuori N560 | 55.8 gr | 84% | 43,250 psi | 68% | 2730 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 90% | 43,801 psi | 69% | 2730 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 98% | 48,979 psi | 77% | 2877 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,079 psi | 74% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,516 psi | 78% | 2785 fps | 99.3% |
| Winchester StaBALL HD | 52.6 gr | 80% | 32,314 psi | 51% | 2579 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,333 psi | 59% | 2516 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 73 powders for .270 WSM loaded with the .277 | 150gr | Rhino Penetrator. Hodgdon Retumbo delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,048 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 1:9.0 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, Vihtavuori N560 rank at the top here: for .270 WSM with the .277 | 150gr | 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.