Load Specifications
Load data in caliber .270 WSM with .277 | 130gr | Barnes TTSX FB bullet and 82 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% | 56,739 psi | 89% | 2995 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 56,231 psi | 88% | 3054 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 57,682 psi | 90% | 2999 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,650 psi | 86% | 3054 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 55,956 psi | 88% | 3015 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,331 psi | 85% | 3081 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 98% | 55,564 psi | 87% | 3130 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,276 psi | 90% | 3041 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,450 psi | 90% | 3064 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,725 psi | 90% | 3156 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,550 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,537 psi | 90% | 3130 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,100 psi | 86% | 3133 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,767 psi | 87% | 3117 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,747 psi | 76% | 3051 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,217 psi | 88% | 3215 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 3114 fps | 97.9% |
| Bofors RP3 | <<locked>> | 82% | 55,027 psi | 86% | 3012 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,100 psi | 86% | 3133 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 57,348 psi | 90% | 3045 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,327 psi | 76% | 2982 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 82% | 54,955 psi | 86% | 3022 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 55,593 psi | 87% | 3091 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 55,201 psi | 87% | 3048 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 96% | 55,738 psi | 87% | 3074 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,607 psi | 86% | 3051 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,897 psi | 86% | 3022 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,805 psi | 75% | 3091 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 88% | 55,854 psi | 88% | 3130 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,985 psi | 58% | 1919 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,434 psi | 87% | 2995 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,711 psi | 90% | 3031 fps | 99.3% |
| IMR 4350 | <<locked>> | 90% | 54,621 psi | 86% | 3018 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,129 psi | 86% | 3012 fps | 99% |
| IMR 4831 | <<locked>> | 90% | 54,694 psi | 86% | 3041 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,130 psi | 90% | 3061 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3166 fps | 97.3% |
| Lovex S062 | <<locked>> | 82% | 56,159 psi | 88% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,840 psi | 88% | 3015 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 57,305 psi | 90% | 3061 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,488 psi | 79% | 2963 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 56,753 psi | 89% | 3051 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,593 psi | 87% | 3074 fps | 97.9% |
| Norma MRP | <<locked>> | 96% | 54,969 psi | 86% | 3166 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 55,999 psi | 88% | 3081 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,174 psi | 90% | 3071 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3189 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 54,882 psi | 86% | 3084 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,866 psi | 81% | 3058 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 59% | 1962 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,578 psi | 86% | 2999 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,824 psi | 86% | 3114 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,421 psi | 90% | 3123 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,593 psi | 87% | 3150 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,066 psi | 75% | 3087 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 84% | 55,376 psi | 87% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,043 psi | 88% | 3051 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 56,985 psi | 89% | 3117 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 57,348 psi | 90% | 3045 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,840 psi | 88% | 3015 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 56,159 psi | 88% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,305 psi | 90% | 3061 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,927 psi | 88% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,187 psi | 86% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,434 psi | 87% | 2966 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,550 psi | 89% | 3114 fps | 98.4% |
| Somchem S355 | <<locked>> | 84% | 54,984 psi | 86% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,273 psi | 85% | 2982 fps | 95.9% |
| Somchem S365 | <<locked>> | 92% | 55,709 psi | 87% | 3087 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,346 psi | 85% | 3035 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 86% | 55,767 psi | 87% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,607 psi | 86% | 3022 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,739 psi | 89% | 3061 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 56,594 psi | 89% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,217 psi | 90% | 3081 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,347 psi | 87% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,013 psi | 86% | 3146 fps | 96.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,097 psi | 80% | 3058 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,392 psi | 90% | 3031 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,854 psi | 88% | 3097 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,619 psi | 81% | 3199 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,667 psi | 90% | 3084 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% | 53,214 psi | 83% | 2936 fps | 98.3% |
| Accurate 3100 | <<locked>> | 82% | 34,113 psi | 53% | 2615 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 54,317 psi | 85% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,279 psi | 66% | 2825 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 49,530 psi | 78% | 2907 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 45,020 psi | 71% | 2900 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 48,950 psi | 77% | 3005 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,705 psi | 79% | 2936 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,041 psi | 85% | 3012 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,972 psi | 63% | 2818 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,397 psi | 71% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 45,020 psi | 71% | 2897 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,859 psi | 67% | 2897 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,342 psi | 48% | 2579 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,997 psi | 53% | 2697 fps | 95.5% |
| Alliant Reloder-26 | 55.9 gr | 80% | 32,677 psi | 51% | 2703 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 45,005 psi | 71% | 2943 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 51,677 psi | 81% | 2956 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,859 psi | 67% | 2897 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 45,150 psi | 71% | 2822 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 98% | 45,310 psi | 71% | 2920 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 51,706 psi | 81% | 2966 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 43,221 psi | 68% | 2858 fps | 97% |
| Hodgdon H4350 | <<locked>> | 80% | 45,788 psi | 72% | 2871 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 52,257 psi | 82% | 3012 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,256 psi | 80% | 2995 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,884 psi | 59% | 2713 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,308 psi | 66% | 2959 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 42,177 psi | 66% | 2867 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,731 psi | 43% | 1716 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,112 psi | 82% | 2943 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,346 psi | 85% | 2976 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 40,640 psi | 64% | 2743 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,035 psi | 72% | 2841 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 40,089 psi | 63% | 2766 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,662 psi | 79% | 2946 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 50,038 psi | 78% | 3041 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 52,823 psi | 83% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,222 psi | 69% | 2802 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 42,656 psi | 67% | 2785 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 35,288 psi | 55% | 2644 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 53,432 psi | 84% | 2999 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,585 psi | 71% | 2890 fps | 95.7% |
| Norma MRP | 58.3 gr | 86% | 39,552 psi | 62% | 2851 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 41,205 psi | 65% | 2808 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,563 psi | 84% | 3015 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 47,021 psi | 74% | 2992 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 39,972 psi | 63% | 2792 fps | 97% |
| Ramshot Magnum | <<locked>> | 94% | 42,221 psi | 66% | 2864 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,268 psi | 44% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,169 psi | 80% | 2943 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,979 psi | 75% | 3002 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,452 psi | 65% | 2831 fps | 98.6% |
| ReloadSwiss RS 70 | 55.3 gr | 80% | 39,740 psi | 62% | 2835 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 39,421 psi | 62% | 2877 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 48,921 psi | 77% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,545 psi | 78% | 2933 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 44,222 psi | 69% | 2884 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 45,150 psi | 71% | 2822 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,222 psi | 69% | 2802 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 52,823 psi | 83% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,656 psi | 67% | 2785 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,516 psi | 78% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,979 psi | 77% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,395 psi | 68% | 2746 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,816 psi | 69% | 2877 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,704 psi | 76% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,155 psi | 80% | 2927 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,927 psi | 59% | 2769 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 39,871 psi | 62% | 2753 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 46,630 psi | 73% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,554 psi | 67% | 2802 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 41,713 psi | 65% | 2785 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 53,316 psi | 84% | 2920 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,148 psi | 66% | 2808 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 33,794 psi | 53% | 2664 fps | 97.4% |
| Vihtavuori N560 | <<locked>> | 94% | 51,445 psi | 81% | 3084 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 47,964 psi | 75% | 3002 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,321 psi | 65% | 2762 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 43,439 psi | 68% | 2861 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,383 psi | 43% | 2572 fps | 96.8% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,295 psi | 69% | 2844 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 82 powders for .270 WSM loaded with the .277 | 130gr | Barnes TTSX FB. Alliant Reloder-26 delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,215 fps. Alliant Reloder-23 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 130.0 gr projectile in 0.277" calls for a 1:9.5 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 | 130gr | Barnes TTSX FB 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.