Load Specifications
Load data in caliber .270 WSM with .277 | 140gr | Peregrine VLR-4 Compact bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 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>> | 96% | 56,376 psi | 88% | 2963 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 54,288 psi | 85% | 2949 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,724 psi | 89% | 3100 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 96% | 57,653 psi | 90% | 3100 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 55,071 psi | 86% | 2900 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,682 psi | 90% | 3041 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 55,434 psi | 87% | 3041 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,858 psi | 66% | 2831 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,579 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,609 psi | 90% | 3048 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,376 psi | 87% | 3015 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,145 psi | 90% | 3028 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,332 psi | 87% | 3041 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,144 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,866 psi | 81% | 3015 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,623 psi | 89% | 3114 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,230 psi | 85% | 3022 fps | 98.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,211 psi | 76% | 2949 fps | 97% |
| Bofors RP5 | <<locked>> | 96% | 55,332 psi | 87% | 3041 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 56,739 psi | 89% | 2940 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,155 psi | 80% | 2956 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 57,682 psi | 90% | 2966 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,201 psi | 87% | 2989 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 54,592 psi | 86% | 2943 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 55,303 psi | 87% | 2976 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,186 psi | 85% | 2956 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,752 psi | 86% | 2920 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,879 psi | 80% | 3068 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 55,390 psi | 87% | 3025 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 58% | 1854 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,725 psi | 90% | 2972 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,624 psi | 90% | 2959 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 57,725 psi | 90% | 2986 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,797 psi | 89% | 2966 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 56,768 psi | 89% | 3074 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 55,390 psi | 87% | 2913 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 56,884 psi | 89% | 2959 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 2920 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 54,795 psi | 86% | 2969 fps | 98.4% |
| Norma MRP | <<locked>> | 94% | 54,824 psi | 86% | 3064 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 55,854 psi | 88% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,406 psi | 90% | 3094 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 54,331 psi | 85% | 2976 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,709 psi | 87% | 3031 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,971 psi | 60% | 1900 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,217 psi | 90% | 2946 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,607 psi | 86% | 3002 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,290 psi | 90% | 3018 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,056 psi | 86% | 3041 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,300 psi | 80% | 3068 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 82% | 54,766 psi | 86% | 2897 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,448 psi | 87% | 2949 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 56,710 psi | 89% | 3018 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 56,739 psi | 89% | 2940 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,390 psi | 87% | 2913 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 56,884 psi | 89% | 2959 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,419 psi | 87% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,638 psi | 90% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,650 psi | 86% | 2861 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,246 psi | 88% | 3015 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 57,667 psi | 90% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,363 psi | 90% | 2946 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 55,912 psi | 88% | 2986 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,464 psi | 90% | 2992 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 55,376 psi | 87% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,566 psi | 90% | 2969 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,782 psi | 89% | 2969 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 56,811 psi | 89% | 2972 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,622 psi | 87% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,708 psi | 86% | 3051 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,679 psi | 86% | 3031 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,753 psi | 89% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,477 psi | 87% | 2992 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,232 psi | 90% | 2986 fps | 98.9% |
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% | 34,142 psi | 54% | 2533 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 44,860 psi | 70% | 2785 fps | 99.7% |
| Accurate High Country | <<locked>> | 86% | 43,656 psi | 68% | 2854 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 92% | 50,575 psi | 79% | 2979 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 52,054 psi | 82% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 42,163 psi | 66% | 2753 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 90% | 45,672 psi | 72% | 2854 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 94% | 35,056 psi | 55% | 2654 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,258 psi | 83% | 2881 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,206 psi | 66% | 2779 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,225 psi | 76% | 2900 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,610 psi | 62% | 2694 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,292 psi | 63% | 2753 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,343 psi | 51% | 2556 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 32,111 psi | 50% | 2569 fps | 95.8% |
| Alliant Reloder-26 | 55.9 gr | 80% | 34,867 psi | 55% | 2684 fps | 97.8% |
| Bofors RP15 | <<locked>> | 88% | 39,958 psi | 63% | 2743 fps | 95.2% |
| Bofors RP30 | <<locked>> | 96% | 42,511 psi | 67% | 2831 fps | 95.3% |
| Bofors RP5 | <<locked>> | 86% | 40,292 psi | 63% | 2753 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 47,311 psi | 74% | 2776 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 42,322 psi | 66% | 2776 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 54,244 psi | 85% | 2913 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,687 psi | 72% | 2818 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 48,167 psi | 75% | 2828 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 48,747 psi | 76% | 2861 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,805 psi | 75% | 2844 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,190 psi | 63% | 2667 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,813 psi | 62% | 2818 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 44,715 psi | 70% | 2835 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 44% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,714 psi | 67% | 2703 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,385 psi | 76% | 2802 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 42,453 psi | 67% | 2723 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,456 psi | 74% | 2802 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 46,702 psi | 73% | 2890 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 46,557 psi | 73% | 2759 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 44,817 psi | 70% | 2746 fps | 98.3% |
| Lovex S071 | <<locked>> | 82% | 31,662 psi | 50% | 2467 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 42,511 psi | 67% | 2736 fps | 95.7% |
| Norma MRP | 55.6 gr | 82% | 37,014 psi | 58% | 2703 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 43,569 psi | 68% | 2762 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 43,772 psi | 69% | 2841 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 42,351 psi | 66% | 2756 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 88% | 37,072 psi | 58% | 2664 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,882 psi | 84% | 2897 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,952 psi | 80% | 2946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,295 psi | 69% | 2799 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,264 psi | 66% | 2805 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,869 psi | 58% | 2736 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 51,532 psi | 81% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,569 psi | 68% | 2730 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 39,044 psi | 61% | 2680 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 47,311 psi | 74% | 2776 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,557 psi | 73% | 2759 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 44,817 psi | 70% | 2746 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,156 psi | 82% | 2900 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,387 psi | 81% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,484 psi | 71% | 2700 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 41,191 psi | 65% | 2733 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 51,387 psi | 81% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,355 psi | 74% | 2776 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 40,495 psi | 63% | 2726 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,405 psi | 59% | 2612 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 48,965 psi | 77% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,933 psi | 70% | 2759 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 39,117 psi | 61% | 2644 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 44,469 psi | 70% | 2762 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 36,245 psi | 57% | 2638 fps | 98.8% |
| Vihtavuori N560 | 61 gr | 90% | 48,109 psi | 75% | 2930 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 94% | 45,063 psi | 71% | 2854 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,613 psi | 68% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,948 psi | 72% | 2822 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,051 psi | 46% | 2566 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,350 psi | 65% | 2700 fps | 95.6% |
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 82 powders for .270 WSM loaded with the .277 | 140gr | Peregrine VLR-4 Compact. Winchester StaBALL HD delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,159 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.277" calls for a 1:9.5 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .270 WSM with the .277 | 140gr | Peregrine VLR-4 Compact they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, 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.