Load Specifications
Load data in caliber .270 WSM with .277 | 130gr | Brenneke TAG bullet and 74 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 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>> | 96% | 57,072 psi | 89% | 3064 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 55,143 psi | 86% | 3058 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 57,087 psi | 89% | 3199 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 94% | 54,462 psi | 85% | 3140 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 82% | 55,347 psi | 87% | 3002 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,418 psi | 85% | 3081 fps | 98% |
| ADI AR 2213 | <<locked>> | 96% | 55,463 psi | 87% | 3130 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,699 psi | 67% | 2927 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,014 psi | 89% | 3035 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,653 psi | 90% | 3153 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,492 psi | 87% | 3117 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,348 psi | 90% | 3127 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,463 psi | 87% | 3140 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,579 psi | 89% | 3127 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,315 psi | 82% | 3117 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,884 psi | 89% | 3219 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,752 psi | 86% | 3123 fps | 98.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 3045 fps | 96.4% |
| Bofors RP5 | <<locked>> | 96% | 55,463 psi | 87% | 3140 fps | 98.4% |
| Bofors RP7 | <<locked>> | 86% | 57,043 psi | 89% | 3038 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,692 psi | 81% | 3048 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 86% | 55,767 psi | 87% | 3091 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 84% | 54,911 psi | 86% | 3041 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 94% | 55,680 psi | 87% | 3071 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,650 psi | 86% | 3054 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,056 psi | 86% | 3022 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,430 psi | 81% | 3169 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 86% | 55,535 psi | 87% | 3123 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,260 psi | 58% | 1929 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,740 psi | 90% | 3068 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,665 psi | 86% | 3005 fps | 99.1% |
| IMR 4831 | <<locked>> | 88% | 54,795 psi | 86% | 3038 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,014 psi | 89% | 3058 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 57,029 psi | 89% | 3173 fps | 97.5% |
| Lovex S065 | <<locked>> | 86% | 56,014 psi | 88% | 3015 fps | 99.8% |
| Lovex S070 | <<locked>> | 88% | 57,406 psi | 90% | 3061 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 3028 fps | 99.6% |
| Norma 204 | <<locked>> | 88% | 55,187 psi | 86% | 3068 fps | 98% |
| Norma MRP | <<locked>> | 94% | 55,172 psi | 86% | 3166 fps | 99.3% |
| Norma URP | <<locked>> | 88% | 56,188 psi | 88% | 3081 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,551 psi | 90% | 3189 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 88% | 54,723 psi | 86% | 3077 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,057 psi | 88% | 3127 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,043 psi | 60% | 1975 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,624 psi | 90% | 3051 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,839 psi | 86% | 3107 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,740 psi | 90% | 3123 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,317 psi | 87% | 3143 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 3169 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 82% | 55,448 psi | 87% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,811 psi | 87% | 3048 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 94% | 56,985 psi | 89% | 3117 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 57,043 psi | 89% | 3038 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,014 psi | 88% | 3015 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 88% | 57,406 psi | 90% | 3061 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,811 psi | 87% | 3054 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,882 psi | 86% | 2871 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,230 psi | 87% | 2959 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,507 psi | 89% | 3110 fps | 98.5% |
| Somchem S355 | <<locked>> | 82% | 55,158 psi | 86% | 2999 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,331 psi | 85% | 2986 fps | 96.1% |
| Somchem S365 | <<locked>> | 90% | 56,115 psi | 88% | 3087 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,839 psi | 86% | 3045 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 84% | 55,985 psi | 88% | 2966 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,592 psi | 86% | 3018 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,159 psi | 90% | 3068 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 57,377 psi | 90% | 3081 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,304 psi | 88% | 3110 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,056 psi | 86% | 3150 fps | 96.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 3133 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,130 psi | 90% | 3025 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,043 psi | 88% | 3097 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3264 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,580 psi | 90% | 3081 fps | 98.5% |
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% | 35,389 psi | 55% | 2638 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 45,803 psi | 72% | 2890 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 47,297 psi | 74% | 3018 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 92% | 50,894 psi | 80% | 3071 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 52,228 psi | 82% | 2953 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 42,728 psi | 67% | 2848 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 49,211 psi | 77% | 3012 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 96% | 38,116 psi | 60% | 2808 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,824 psi | 84% | 2986 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,772 psi | 67% | 2877 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,704 psi | 76% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 42,728 psi | 67% | 2844 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 43,584 psi | 68% | 2907 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,330 psi | 52% | 2661 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 33,112 psi | 52% | 2667 fps | 95.4% |
| Alliant Reloder-26 | 57.2 gr | 80% | 35,882 psi | 56% | 2789 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 43,033 psi | 67% | 2894 fps | 95.4% |
| Bofors RP30 | <<locked>> | 98% | 45,992 psi | 72% | 2989 fps | 95.6% |
| Bofors RP5 | <<locked>> | 88% | 43,584 psi | 68% | 2907 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 47,979 psi | 75% | 2874 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 45,687 psi | 72% | 2927 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 46,383 psi | 73% | 2917 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 48,747 psi | 76% | 2930 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 52,431 psi | 82% | 3018 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 51,474 psi | 81% | 2999 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,988 psi | 64% | 2769 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 40,553 psi | 64% | 2913 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 45,368 psi | 71% | 2933 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 44% | 1726 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,250 psi | 68% | 2799 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,820 psi | 77% | 2897 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 43,439 psi | 68% | 2828 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 90% | 50,633 psi | 79% | 2946 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 47,442 psi | 74% | 2989 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 47,355 psi | 74% | 2861 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 45,585 psi | 71% | 2844 fps | 97.9% |
| Lovex S071 | <<locked>> | 84% | 34,809 psi | 55% | 2621 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 42,946 psi | 67% | 2828 fps | 95.1% |
| Norma MRP | 56.9 gr | 82% | 37,869 psi | 59% | 2805 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 44,251 psi | 69% | 2864 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 47,311 psi | 74% | 2995 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 42,844 psi | 67% | 2851 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 40,364 psi | 63% | 2818 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,805 psi | 45% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,230 psi | 85% | 2992 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,329 psi | 80% | 3051 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,107 psi | 71% | 2904 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,888 psi | 67% | 2904 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 37,840 psi | 59% | 2835 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,272 psi | 82% | 2956 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 46,876 psi | 73% | 2881 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 84% | 42,105 psi | 66% | 2831 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 47,979 psi | 75% | 2874 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,355 psi | 74% | 2861 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 45,585 psi | 71% | 2844 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,431 psi | 82% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,692 psi | 81% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,282 psi | 73% | 2799 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 41,727 psi | 65% | 2828 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 52,127 psi | 82% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 50,937 psi | 80% | 2923 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 41,220 psi | 65% | 2831 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,493 psi | 60% | 2713 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 49,617 psi | 78% | 2867 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,556 psi | 71% | 2858 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 86% | 39,856 psi | 62% | 2740 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 45,324 psi | 71% | 2864 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 37,362 psi | 59% | 2743 fps | 98.6% |
| Vihtavuori N560 | 62.5 gr | 90% | 48,718 psi | 76% | 3028 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 96% | 48,994 psi | 77% | 3018 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,382 psi | 70% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,644 psi | 73% | 2923 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,110 psi | 47% | 2667 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,989 psi | 66% | 2792 fps | 95% |
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 80 powders for .270 WSM loaded with the .277 | 130gr | Brenneke TAG. Winchester StaBALL HD delivers the highest muzzle velocity at 3,264 fps; across all powders the maximum-charge window runs from 1,929 fps to 3,264 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 130.0 gr projectile in 0.277" calls for a 1:10.0 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. Norma MRP, Alliant Reloder-26, Vihtavuori N560 rank at the top here: for .270 WSM with the .277 | 130gr | Brenneke TAG they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, ReloadSwiss RS 80 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.