Load Specifications
Load data in caliber .270 WSM with .277 | 125gr | Peregrine VLR-4 bullet and 85 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 Norma MRP.
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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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 2700 | <<locked>> | 82% | 55,550 psi | 87% | 3028 fps | 98.3% |
| Accurate 3100 | <<locked>> | 98% | 55,027 psi | 86% | 3091 fps | 99.4% |
| Accurate 4064 | <<locked>> | 82% | 56,434 psi | 88% | 3035 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,681 psi | 89% | 3143 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 55,317 psi | 87% | 3228 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 54,795 psi | 86% | 3051 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,608 psi | 89% | 3169 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 98% | 54,534 psi | 85% | 3163 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,725 psi | 90% | 3238 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,043 psi | 88% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,159 psi | 88% | 3100 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,463 psi | 88% | 3192 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,157 psi | 85% | 3163 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,217 psi | 88% | 3163 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,435 psi | 90% | 3225 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,288 psi | 85% | 3156 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,558 psi | 75% | 3077 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,752 psi | 86% | 3248 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,924 psi | 83% | 3146 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 57,377 psi | 90% | 3104 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,435 psi | 90% | 3225 fps | 98.3% |
| Bofors RP7 | <<locked>> | 88% | 56,333 psi | 88% | 3081 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 84% | 57,334 psi | 90% | 3114 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 54,433 psi | 85% | 3123 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 88% | 57,537 psi | 90% | 3140 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,174 psi | 90% | 3146 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,927 psi | 89% | 3110 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,528 psi | 73% | 3110 fps | 96.5% |
| Hodgdon Superformance | <<locked>> | 88% | 54,418 psi | 85% | 3159 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,782 psi | 58% | 1955 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,740 psi | 90% | 3087 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,550 psi | 89% | 3064 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 56,884 psi | 89% | 3107 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,276 psi | 90% | 3100 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 56,594 psi | 89% | 3127 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,624 psi | 90% | 3133 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,014 psi | 88% | 3094 fps | 96.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,724 psi | 87% | 3196 fps | 96.6% |
| Lovex S062 | <<locked>> | 82% | 55,013 psi | 86% | 3031 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,882 psi | 86% | 3054 fps | 99.5% |
| Lovex S070 | <<locked>> | 90% | 56,173 psi | 88% | 3097 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 2992 fps | 98.7% |
| Norma 203B | <<locked>> | 82% | 55,521 psi | 87% | 3091 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,302 psi | 85% | 3104 fps | 97.3% |
| Norma MRP | <<locked>> | 98% | 56,985 psi | 89% | 3255 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 54,853 psi | 86% | 3120 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 56,057 psi | 88% | 3110 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,014 psi | 88% | 3209 fps | 97% |
| Ramshot Hunter | <<locked>> | 92% | 57,000 psi | 89% | 3169 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,691 psi | 79% | 3084 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 59% | 2005 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,869 psi | 89% | 3094 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,363 psi | 90% | 3212 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,028 psi | 88% | 3156 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,259 psi | 85% | 3182 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,746 psi | 73% | 3104 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 82% | 57,174 psi | 90% | 3048 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,522 psi | 90% | 3100 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,897 psi | 86% | 3081 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 96% | 55,622 psi | 87% | 3146 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 88% | 56,333 psi | 88% | 3081 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,882 psi | 86% | 3054 fps | 99.5% |
| Shooters World Precision | <<locked>> | 82% | 55,013 psi | 86% | 3031 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,173 psi | 88% | 3097 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,795 psi | 86% | 3097 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,566 psi | 90% | 2969 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,447 psi | 85% | 2999 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,187 psi | 86% | 3146 fps | 97.8% |
| Somchem S355 | <<locked>> | 86% | 57,101 psi | 89% | 3091 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,826 psi | 89% | 3074 fps | 96% |
| Somchem S365 | <<locked>> | 92% | 54,288 psi | 85% | 3127 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,478 psi | 89% | 3123 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 57,363 psi | 90% | 3002 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,159 psi | 90% | 3012 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,795 psi | 86% | 3012 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,652 psi | 89% | 3110 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,608 psi | 87% | 3094 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 82% | 55,651 psi | 87% | 3012 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,028 psi | 88% | 3117 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 57,392 psi | 90% | 3189 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,043 psi | 89% | 3238 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,086 psi | 88% | 3071 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,694 psi | 86% | 3130 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,719 psi | 78% | 3228 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,188 psi | 88% | 3110 fps | 97.8% |
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 2700 | <<locked>> | 80% | 52,301 psi | 82% | 2969 fps | 97.8% |
| Accurate 3100 | <<locked>> | 84% | 35,273 psi | 55% | 2690 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 53,374 psi | 84% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,089 psi | 64% | 2854 fps | 98.5% |
| Accurate High Country | 62.8 gr | 92% | 48,486 psi | 76% | 3097 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 48,776 psi | 76% | 2946 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 46,905 psi | 74% | 2989 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 96% | 50,981 psi | 80% | 3094 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,882 psi | 84% | 3173 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,617 psi | 78% | 2972 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,881 psi | 83% | 3048 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,015 psi | 61% | 2848 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,367 psi | 70% | 2982 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,845 psi | 69% | 2923 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 92% | 44,454 psi | 70% | 2982 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,704 psi | 47% | 2605 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 90% | 35,259 psi | 55% | 2779 fps | 95.6% |
| Alliant Reloder-26 | 57.6 gr | 82% | 33,866 psi | 53% | 2782 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 43,918 psi | 69% | 2966 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 50,720 psi | 79% | 2995 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 44,454 psi | 70% | 2982 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 44,222 psi | 69% | 2851 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 50,546 psi | 79% | 2999 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 42,366 psi | 66% | 2887 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 44,947 psi | 70% | 2904 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,374 psi | 84% | 3081 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,912 psi | 58% | 2740 fps | 98.9% |
| Hodgdon Retumbo | <<locked>> | 98% | 43,816 psi | 69% | 3041 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 41,292 psi | 65% | 2894 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,630 psi | 43% | 1749 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,314 psi | 80% | 2982 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,301 psi | 84% | 3009 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 42,177 psi | 66% | 2828 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,310 psi | 71% | 2877 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 39,262 psi | 62% | 2799 fps | 98.1% |
| IMR 4895 | <<locked>> | 80% | 54,186 psi | 85% | 3077 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,736 psi | 83% | 3035 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 98% | 51,967 psi | 81% | 3130 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 52,011 psi | 82% | 2982 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,453 psi | 68% | 2838 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 41,669 psi | 65% | 2815 fps | 96.3% |
| Lovex S071 | <<locked>> | 90% | 36,434 psi | 57% | 2723 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,272 psi | 82% | 3035 fps | 100% |
| Norma 204 | <<locked>> | 86% | 47,718 psi | 75% | 2982 fps | 95.8% |
| Norma MRP | 60 gr | 88% | 41,002 psi | 64% | 2936 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,147 psi | 63% | 2835 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 52,504 psi | 82% | 3054 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 48,921 psi | 77% | 3077 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 38,943 psi | 61% | 2815 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 94% | 41,379 psi | 65% | 2890 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,326 psi | 44% | 1795 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,285 psi | 79% | 2976 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,905 psi | 74% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,466 psi | 63% | 2861 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,943 psi | 61% | 2861 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 40,973 psi | 64% | 2963 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 53,824 psi | 84% | 2995 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,790 psi | 75% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 51,619 psi | 81% | 3025 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 90% | 46,021 psi | 72% | 2969 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 44,222 psi | 69% | 2851 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,453 psi | 68% | 2838 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 52,011 psi | 82% | 2982 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,669 psi | 65% | 2815 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,356 psi | 76% | 2986 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,254 psi | 76% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,540 psi | 67% | 2776 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 45,600 psi | 71% | 2966 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 47,892 psi | 75% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,287 psi | 84% | 3015 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 36,811 psi | 58% | 2795 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 41,423 psi | 65% | 2838 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 54,186 psi | 85% | 2956 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,824 psi | 84% | 2963 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,571 psi | 71% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,524 psi | 65% | 2831 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 43,149 psi | 68% | 2864 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 52,199 psi | 82% | 2959 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,133 psi | 64% | 2835 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 32,996 psi | 52% | 2694 fps | 96.8% |
| Vihtavuori N560 | <<locked>> | 96% | 53,635 psi | 84% | 3176 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,524 psi | 64% | 2795 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 42,366 psi | 66% | 2887 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,672 psi | 42% | 2582 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 92% | 46,093 psi | 72% | 2930 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 94 powders for .270 WSM loaded with the .277 | 125gr | Peregrine VLR-4. Norma MRP delivers the highest muzzle velocity at 3,255 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,255 fps. ADI AR 2217 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 125.0 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-22 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, Norma MRP rank at the top here: for .270 WSM with the .277 | 125gr | Peregrine VLR-4 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.