Load Specifications
Load data in caliber .270 WSM with .277 | 120gr | Barnes Solid bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and ReloadSwiss RS 70.
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% | 56,550 psi | 89% | 3087 fps | 98.2% |
| Accurate 3100 | <<locked>> | 98% | 56,463 psi | 88% | 3156 fps | 99.4% |
| Accurate 4350 | <<locked>> | 88% | 54,650 psi | 86% | 3153 fps | 99.9% |
| Accurate High Country | <<locked>> | 96% | 56,550 psi | 89% | 3291 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 55,811 psi | 87% | 3114 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,638 psi | 90% | 3232 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 98% | 55,550 psi | 87% | 3225 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 57,740 psi | 90% | 3228 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 57,740 psi | 90% | 3228 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,217 psi | 90% | 3146 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,363 psi | 90% | 3169 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,276 psi | 90% | 3255 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,187 psi | 86% | 3225 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,971 psi | 89% | 3219 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,027 psi | 86% | 3232 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3222 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,733 psi | 76% | 3143 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,970 psi | 88% | 3314 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 3212 fps | 97.2% |
| Bofors RP3 | <<locked>> | 82% | 55,492 psi | 87% | 3120 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,027 psi | 86% | 3232 fps | 97.5% |
| Bofors RP7 | <<locked>> | 88% | 57,435 psi | 90% | 3143 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 82% | 55,245 psi | 87% | 3127 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 88% | 55,666 psi | 87% | 3192 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 86% | 54,824 psi | 86% | 3136 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,694 psi | 86% | 3123 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,776 psi | 75% | 3173 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 88% | 55,521 psi | 87% | 3225 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 58% | 1998 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,419 psi | 87% | 3097 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,537 psi | 90% | 3127 fps | 98.9% |
| IMR 4350 | <<locked>> | 90% | 54,563 psi | 86% | 3114 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,868 psi | 86% | 3104 fps | 98.5% |
| IMR 4831 | <<locked>> | 90% | 54,723 psi | 86% | 3140 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,029 psi | 89% | 3153 fps | 95.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,695 psi | 89% | 3258 fps | 96.4% |
| Lovex S062 | <<locked>> | 82% | 56,318 psi | 88% | 3100 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,057 psi | 88% | 3117 fps | 99.5% |
| Lovex S070 | <<locked>> | 90% | 57,348 psi | 90% | 3159 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 3061 fps | 98.7% |
| Norma 203B | <<locked>> | 82% | 56,753 psi | 89% | 3156 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,187 psi | 86% | 3166 fps | 97.1% |
| Norma MRP | <<locked>> | 96% | 54,621 psi | 86% | 3261 fps | 98.7% |
| Norma URP | <<locked>> | 90% | 55,883 psi | 88% | 3182 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 57,101 psi | 89% | 3176 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,319 psi | 90% | 3278 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 90% | 54,563 psi | 86% | 3176 fps | 99.2% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,837 psi | 81% | 3146 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,855 psi | 59% | 2044 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,752 psi | 86% | 3100 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,491 psi | 85% | 3215 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,435 psi | 90% | 3225 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,114 psi | 86% | 3245 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,225 psi | 76% | 3176 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 84% | 55,521 psi | 87% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,724 psi | 87% | 3140 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 96% | 56,579 psi | 89% | 3209 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 88% | 57,435 psi | 90% | 3143 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,057 psi | 88% | 3117 fps | 99.5% |
| Shooters World Precision | <<locked>> | 82% | 56,318 psi | 88% | 3100 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,348 psi | 90% | 3159 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,840 psi | 88% | 3163 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,245 psi | 87% | 2982 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,651 psi | 87% | 3061 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,086 psi | 88% | 3202 fps | 97.7% |
| Somchem S355 | <<locked>> | 84% | 55,143 psi | 86% | 3107 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 55,608 psi | 87% | 3192 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,491 psi | 85% | 3136 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 86% | 55,999 psi | 88% | 3074 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,302 psi | 85% | 3117 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3156 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 82% | 56,797 psi | 89% | 3077 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,334 psi | 90% | 3182 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 96% | 55,506 psi | 87% | 3205 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,072 psi | 89% | 3133 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,666 psi | 87% | 3192 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,024 psi | 80% | 3297 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,319 psi | 90% | 3173 fps | 97.6% |
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% | 53,461 psi | 84% | 3035 fps | 97.7% |
| Accurate 3100 | <<locked>> | 84% | 37,057 psi | 58% | 2769 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 42,859 psi | 67% | 2927 fps | 98.5% |
| Accurate High Country | <<locked>> | 92% | 49,661 psi | 78% | 3163 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 49,647 psi | 78% | 3005 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 47,935 psi | 75% | 3051 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 52,098 psi | 82% | 3156 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 48,370 psi | 76% | 3058 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 48,370 psi | 76% | 3058 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,937 psi | 80% | 3041 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,128 psi | 85% | 3117 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,248 psi | 63% | 2913 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,324 psi | 71% | 3048 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 47,819 psi | 75% | 3048 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 45,629 psi | 72% | 3045 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,082 psi | 49% | 2677 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 90% | 36,564 psi | 57% | 2848 fps | 95.7% |
| Alliant Reloder-26 | 56.8 gr | 80% | 33,272 psi | 52% | 2795 fps | 95.1% |
| Bofors RP15 | <<locked>> | 96% | 47,819 psi | 75% | 3091 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 52,098 psi | 82% | 3061 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 45,629 psi | 72% | 3045 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 45,600 psi | 71% | 2917 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 51,895 psi | 81% | 3068 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 43,439 psi | 68% | 2953 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 45,847 psi | 72% | 2963 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,145 psi | 60% | 2805 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 98% | 45,092 psi | 71% | 3110 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 42,409 psi | 66% | 2959 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 44% | 1788 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,243 psi | 82% | 3045 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,273 psi | 85% | 3071 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 43,294 psi | 68% | 2890 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,209 psi | 72% | 2940 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 40,567 psi | 64% | 2864 fps | 98.1% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,795 psi | 84% | 3097 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 53,098 psi | 83% | 3192 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 53,156 psi | 83% | 3048 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,715 psi | 70% | 2904 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 43,192 psi | 68% | 2887 fps | 96.4% |
| Lovex S071 | <<locked>> | 88% | 36,230 psi | 57% | 2749 fps | 95% |
| Norma 203B | <<locked>> | 80% | 53,519 psi | 84% | 3100 fps | 100% |
| Norma 204 | <<locked>> | 86% | 48,762 psi | 76% | 3045 fps | 95.7% |
| Norma MRP | 60.7 gr | 88% | 42,467 psi | 67% | 3005 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 41,539 psi | 65% | 2904 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 53,635 psi | 84% | 3120 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 50,067 psi | 78% | 3140 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 40,205 psi | 63% | 2884 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 96% | 45,324 psi | 71% | 3015 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,601 psi | 45% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,474 psi | 81% | 3041 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,848 psi | 75% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,901 psi | 66% | 2933 fps | 98.1% |
| ReloadSwiss RS 70 | 56.3 gr | 80% | 40,118 psi | 63% | 2930 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 42,482 psi | 67% | 3035 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 49,429 psi | 77% | 3012 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,547 psi | 82% | 3081 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 47,181 psi | 74% | 3031 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 45,600 psi | 71% | 2917 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,715 psi | 70% | 2904 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 53,156 psi | 83% | 3048 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,192 psi | 68% | 2887 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,458 psi | 78% | 3051 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,211 psi | 77% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,918 psi | 69% | 2841 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 46,746 psi | 73% | 3028 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 49,110 psi | 77% | 2999 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 38,319 psi | 60% | 2867 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 42,844 psi | 67% | 2907 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 46,934 psi | 74% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,844 psi | 67% | 2897 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 44,498 psi | 70% | 2930 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 53,388 psi | 84% | 3025 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,482 psi | 67% | 2904 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 34,548 psi | 54% | 2769 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,640 psi | 65% | 2858 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 43,598 psi | 68% | 2956 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,253 psi | 44% | 2667 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 92% | 47,355 psi | 74% | 2995 fps | 95.5% |
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 78 powders for .270 WSM loaded with the .277 | 120gr | Barnes Solid. Alliant Reloder-26 delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 1,998 fps to 3,314 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 78 of the 78 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 120.0 gr projectile in 0.277" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for .270 WSM with the .277 | 120gr | Barnes Solid 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.