Load Specifications
Load data in caliber .270 WSM with .277 | 130gr | Nosler Expansion Tip bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 4350, Norma MRP 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 2700 | <<locked>> | 82% | 56,478 psi | 89% | 2989 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 56,231 psi | 88% | 3054 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 57,624 psi | 90% | 2995 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,346 psi | 85% | 3048 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 56,652 psi | 89% | 3196 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 98% | 57,537 psi | 90% | 3192 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 55,680 psi | 87% | 3009 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,288 psi | 85% | 3077 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 98% | 55,550 psi | 87% | 3130 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,971 psi | 89% | 3038 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,145 psi | 90% | 3061 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,421 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,187 psi | 86% | 3120 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,232 psi | 90% | 3127 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,071 psi | 86% | 3133 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,782 psi | 87% | 3120 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,515 psi | 76% | 3048 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,202 psi | 88% | 3215 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3114 fps | 97.9% |
| Bofors RP3 | <<locked>> | 82% | 54,926 psi | 86% | 3009 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,071 psi | 86% | 3133 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 57,276 psi | 90% | 3041 fps | 99% |
| Hodgdon H380 | <<locked>> | 82% | 54,911 psi | 86% | 3022 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 55,608 psi | 87% | 3091 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 54,911 psi | 86% | 3041 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 96% | 55,724 psi | 87% | 3071 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,636 psi | 86% | 3054 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,824 psi | 86% | 3022 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,587 psi | 75% | 3084 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 55,550 psi | 87% | 3123 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,854 psi | 58% | 1916 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,405 psi | 87% | 2995 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,450 psi | 90% | 3025 fps | 99.3% |
| IMR 4350 | <<locked>> | 90% | 54,650 psi | 86% | 3018 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,882 psi | 86% | 3009 fps | 99% |
| IMR 4831 | <<locked>> | 90% | 54,331 psi | 85% | 3035 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,188 psi | 90% | 3061 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3166 fps | 97.2% |
| Lovex S062 | <<locked>> | 82% | 56,130 psi | 88% | 2992 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,854 psi | 88% | 3015 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 57,246 psi | 90% | 3058 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,473 psi | 79% | 2963 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 56,463 psi | 88% | 3048 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,274 psi | 87% | 3071 fps | 97.8% |
| Norma MRP | <<locked>> | 96% | 54,665 psi | 86% | 3159 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 55,970 psi | 88% | 3081 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,188 psi | 90% | 3071 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,319 psi | 90% | 3182 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 54,578 psi | 86% | 3077 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,909 psi | 81% | 3054 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1965 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,578 psi | 86% | 3002 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,781 psi | 86% | 3114 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,406 psi | 90% | 3123 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,288 psi | 87% | 3146 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,892 psi | 75% | 3084 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 84% | 55,056 psi | 86% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,811 psi | 87% | 3045 fps | 97% |
| Rottweil R 905 | <<locked>> | 96% | 56,753 psi | 89% | 3114 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 57,276 psi | 90% | 3041 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,854 psi | 88% | 3015 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 56,130 psi | 88% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,246 psi | 90% | 3058 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,883 psi | 88% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,158 psi | 86% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,158 psi | 86% | 2959 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,275 psi | 88% | 3107 fps | 98.3% |
| Somchem S355 | <<locked>> | 84% | 54,723 psi | 86% | 2999 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,259 psi | 85% | 2982 fps | 95.9% |
| Somchem S365 | <<locked>> | 92% | 55,637 psi | 87% | 3087 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,317 psi | 85% | 3035 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 86% | 55,767 psi | 87% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,331 psi | 85% | 3018 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,826 psi | 89% | 3061 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 56,550 psi | 89% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,246 psi | 90% | 3081 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,347 psi | 87% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,766 psi | 86% | 3143 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,145 psi | 90% | 3028 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,840 psi | 88% | 3097 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,329 psi | 80% | 3196 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,421 psi | 90% | 3077 fps | 98.3% |
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 2700 | <<locked>> | 80% | 53,185 psi | 83% | 2933 fps | 98.2% |
| Accurate 3100 | <<locked>> | 82% | 33,881 psi | 53% | 2608 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 54,288 psi | 85% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,989 psi | 66% | 2818 fps | 98.9% |
| Accurate High Country | <<locked>> | 90% | 46,296 psi | 73% | 3002 fps | 95% |
| Accurate MAGPRO | <<locked>> | 96% | 53,722 psi | 84% | 3127 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 49,530 psi | 78% | 2904 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 44,962 psi | 70% | 2900 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 49,008 psi | 77% | 3005 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,676 psi | 79% | 2936 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,737 psi | 84% | 3005 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,914 psi | 63% | 2818 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,339 psi | 71% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,759 psi | 70% | 2894 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,656 psi | 67% | 2890 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,298 psi | 47% | 2579 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,953 psi | 53% | 2697 fps | 95.5% |
| Alliant Reloder-26 | 55.7 gr | 80% | 32,460 psi | 51% | 2697 fps | 95.8% |
| Bofors RP15 | <<locked>> | 94% | 44,788 psi | 70% | 2936 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 51,648 psi | 81% | 2956 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,656 psi | 67% | 2890 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 45,136 psi | 71% | 2822 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 80% | 51,619 psi | 81% | 2966 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 43,178 psi | 68% | 2854 fps | 97% |
| Hodgdon H4350 | <<locked>> | 80% | 45,759 psi | 72% | 2867 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 52,315 psi | 82% | 3012 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,256 psi | 80% | 2992 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,637 psi | 59% | 2707 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,090 psi | 66% | 2953 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 42,148 psi | 66% | 2867 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 44% | 1716 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,083 psi | 82% | 2940 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,070 psi | 85% | 2969 fps | 98.9% |
| IMR 4350 | 51.5 gr | 80% | 40,393 psi | 63% | 2740 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,006 psi | 72% | 2841 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 40,059 psi | 63% | 2762 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,705 psi | 79% | 2946 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 50,009 psi | 78% | 3038 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 52,823 psi | 83% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,164 psi | 69% | 2802 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 42,598 psi | 67% | 2785 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 35,230 psi | 55% | 2644 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 53,127 psi | 83% | 2992 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,556 psi | 71% | 2887 fps | 95.6% |
| Norma MRP | 58.1 gr | 86% | 39,305 psi | 62% | 2844 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 41,147 psi | 64% | 2805 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,519 psi | 84% | 3015 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,789 psi | 73% | 2986 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,726 psi | 62% | 2785 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 94% | 42,235 psi | 66% | 2864 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 44% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,126 psi | 80% | 2943 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,935 psi | 75% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,365 psi | 65% | 2831 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,740 psi | 62% | 2835 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 39,247 psi | 62% | 2874 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 48,892 psi | 77% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,530 psi | 78% | 2933 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 44,193 psi | 69% | 2881 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 45,136 psi | 71% | 2822 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,164 psi | 69% | 2802 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 52,823 psi | 83% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,598 psi | 67% | 2785 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,240 psi | 77% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,936 psi | 77% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,178 psi | 68% | 2740 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,787 psi | 69% | 2877 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,660 psi | 76% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,879 psi | 80% | 2923 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,666 psi | 59% | 2766 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 39,798 psi | 62% | 2753 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 46,572 psi | 73% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,322 psi | 66% | 2795 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 41,495 psi | 65% | 2779 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 53,301 psi | 84% | 2920 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,090 psi | 66% | 2805 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 33,765 psi | 53% | 2664 fps | 97.4% |
| Vihtavuori N560 | <<locked>> | 94% | 51,155 psi | 80% | 3077 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,321 psi | 65% | 2762 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 43,178 psi | 68% | 2854 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,224 psi | 43% | 2566 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,077 psi | 69% | 2841 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 91 powders for .270 WSM loaded with the .277 | 130gr | Nosler Expansion Tip. Alliant Reloder-26 delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 1,916 fps to 3,215 fps. ADI AR 2217 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 130.0 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-23 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. IMR 4350, Norma MRP, Alliant Reloder-26 rank at the top here: for .270 WSM with the .277 | 130gr | Nosler Expansion Tip they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 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.