Load Specifications
Load data in caliber .270 WSM with .277 | 120gr | Barnes BND SPIT-FIRE bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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% | 56,289 psi | 88% | 3081 fps | 98.1% |
| Accurate 3100 | <<locked>> | 98% | 55,941 psi | 88% | 3143 fps | 99.3% |
| Accurate 4350 | <<locked>> | 88% | 53,998 psi | 85% | 3140 fps | 99.8% |
| Accurate High Country | <<locked>> | 96% | 55,666 psi | 87% | 3274 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 55,216 psi | 87% | 3100 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,811 psi | 89% | 3215 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,565 psi | 89% | 3136 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,724 psi | 89% | 3156 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,695 psi | 89% | 3241 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,476 psi | 85% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,521 psi | 89% | 3209 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3274 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,911 psi | 86% | 3212 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,080 psi | 75% | 3127 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,158 psi | 86% | 3297 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,345 psi | 84% | 3196 fps | 97% |
| Bofors RP3 | <<locked>> | 82% | 54,853 psi | 86% | 3107 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3274 fps | 97.9% |
| Bofors RP7 | <<locked>> | 88% | 56,898 psi | 89% | 3130 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 82% | 54,621 psi | 86% | 3114 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 88% | 55,129 psi | 86% | 3182 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 86% | 54,549 psi | 85% | 3130 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,537 psi | 90% | 3166 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,413 psi | 74% | 3163 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 88% | 54,694 psi | 86% | 3205 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1991 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,027 psi | 86% | 3087 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,942 psi | 89% | 3114 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 57,232 psi | 90% | 3156 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,563 psi | 86% | 3097 fps | 98.4% |
| IMR 4831 | <<locked>> | 92% | 57,421 psi | 90% | 3182 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3241 fps | 96.1% |
| Lovex S062 | <<locked>> | 82% | 55,985 psi | 88% | 3094 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,564 psi | 87% | 3107 fps | 99.4% |
| Lovex S070 | <<locked>> | 90% | 56,811 psi | 89% | 3150 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,198 psi | 79% | 3048 fps | 98.6% |
| Norma 203B | <<locked>> | 82% | 56,115 psi | 88% | 3143 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,737 psi | 86% | 3153 fps | 97% |
| Norma MRP | <<locked>> | 98% | 57,566 psi | 90% | 3307 fps | 99% |
| Norma URP | <<locked>> | 90% | 55,288 psi | 87% | 3169 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 56,478 psi | 89% | 3163 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,608 psi | 89% | 3258 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 92% | 57,276 psi | 90% | 3222 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,242 psi | 80% | 3130 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,898 psi | 59% | 2041 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,392 psi | 90% | 3143 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,638 psi | 90% | 3264 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,840 psi | 89% | 3212 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,549 psi | 85% | 3232 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,630 psi | 75% | 3156 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 84% | 54,926 psi | 86% | 3104 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,288 psi | 87% | 3127 fps | 96% |
| Rottweil R 905 | <<locked>> | 96% | 56,101 psi | 88% | 3199 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 88% | 56,898 psi | 89% | 3130 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,564 psi | 87% | 3107 fps | 99.4% |
| Shooters World Precision | <<locked>> | 82% | 55,985 psi | 88% | 3094 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,811 psi | 89% | 3150 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,317 psi | 87% | 3150 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,636 psi | 86% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,100 psi | 86% | 3048 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,593 psi | 87% | 3192 fps | 97.5% |
| Somchem S355 | <<locked>> | 86% | 57,740 psi | 90% | 3146 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 54,766 psi | 86% | 3179 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,246 psi | 90% | 3179 fps | 98.5% |
| Vihtavuori N140 | <<locked>> | 82% | 57,638 psi | 90% | 3068 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,448 psi | 87% | 3064 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,305 psi | 90% | 3163 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 3140 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 82% | 56,246 psi | 88% | 3068 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,623 psi | 89% | 3169 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 96% | 54,897 psi | 86% | 3192 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,609 psi | 90% | 3287 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,347 psi | 88% | 3120 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,129 psi | 86% | 3182 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,328 psi | 79% | 3281 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,869 psi | 89% | 3163 fps | 97.5% |
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 2700 | <<locked>> | 80% | 52,895 psi | 83% | 3022 fps | 97.5% |
| Accurate 3100 | <<locked>> | 84% | 36,593 psi | 57% | 2756 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 42,308 psi | 66% | 2917 fps | 98.4% |
| Accurate High Country | <<locked>> | 94% | 52,112 psi | 82% | 3209 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,284 psi | 77% | 2995 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 47,456 psi | 74% | 3038 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,531 psi | 79% | 3035 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,519 psi | 84% | 3100 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,929 psi | 63% | 2904 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,976 psi | 70% | 3035 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 47,340 psi | 74% | 3035 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 45,107 psi | 71% | 3031 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,821 psi | 48% | 2667 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 90% | 36,187 psi | 57% | 2835 fps | 95.4% |
| Alliant Reloder-26 | 57.6 gr | 82% | 34,925 psi | 55% | 2844 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 47,282 psi | 74% | 3077 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 51,677 psi | 81% | 3054 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 45,107 psi | 71% | 3031 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 45,266 psi | 71% | 2910 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 51,517 psi | 81% | 3058 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 43,076 psi | 68% | 2943 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 80% | 45,556 psi | 71% | 2953 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,739 psi | 59% | 2795 fps | 98.8% |
| Hodgdon Retumbo | <<locked>> | 98% | 44,469 psi | 70% | 3091 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 41,989 psi | 66% | 2946 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 44% | 1781 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,866 psi | 81% | 3035 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,737 psi | 84% | 3058 fps | 98.3% |
| IMR 4350 | <<locked>> | 82% | 42,815 psi | 67% | 2877 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,861 psi | 72% | 2927 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 40,219 psi | 63% | 2854 fps | 98% |
| IMR 7828 SSC | <<locked>> | 98% | 52,649 psi | 83% | 3179 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 52,823 psi | 83% | 3041 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,353 psi | 70% | 2890 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 42,627 psi | 67% | 2871 fps | 96.1% |
| Lovex S071 | <<locked>> | 90% | 37,956 psi | 59% | 2789 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,895 psi | 83% | 3087 fps | 100% |
| Norma 204 | <<locked>> | 86% | 48,240 psi | 76% | 3031 fps | 95.5% |
| Norma MRP | 60.1 gr | 88% | 41,959 psi | 66% | 2995 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 40,944 psi | 64% | 2890 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 52,997 psi | 83% | 3104 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,852 psi | 83% | 3189 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 39,740 psi | 62% | 2871 fps | 96% |
| Ramshot Magnum | <<locked>> | 96% | 45,005 psi | 71% | 3005 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 45% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,894 psi | 80% | 3028 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,485 psi | 74% | 3094 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,350 psi | 65% | 2920 fps | 97.9% |
| ReloadSwiss RS 70 | 55.7 gr | 80% | 39,682 psi | 62% | 2917 fps | 97.1% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 41,959 psi | 66% | 3018 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 48,762 psi | 76% | 2995 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,069 psi | 82% | 3071 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 46,659 psi | 73% | 3022 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,266 psi | 71% | 2910 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,353 psi | 70% | 2890 fps | 97.7% |
| Shooters World Precision | <<locked>> | 80% | 52,823 psi | 83% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,627 psi | 67% | 2871 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,921 psi | 77% | 3038 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,849 psi | 77% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,410 psi | 68% | 2825 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 46,224 psi | 72% | 3015 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 48,747 psi | 76% | 2992 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 37,768 psi | 59% | 2854 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 42,583 psi | 67% | 2897 fps | 95.2% |
| Vihtavuori N140 | <<locked>> | 80% | 54,375 psi | 85% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 46,383 psi | 73% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,279 psi | 66% | 2884 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 43,990 psi | 69% | 2917 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 53,113 psi | 83% | 3018 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,148 psi | 66% | 2894 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 34,127 psi | 53% | 2756 fps | 96.7% |
| Vihtavuori N560 | <<locked>> | 96% | 53,998 psi | 85% | 3222 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,191 psi | 65% | 2848 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 43,076 psi | 68% | 2943 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,905 psi | 44% | 2651 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 92% | 46,717 psi | 73% | 2979 fps | 95.2% |
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 89 powders for .270 WSM loaded with the .277 | 120gr | Barnes BND SPIT-FIRE. Norma MRP delivers the highest muzzle velocity at 3,307 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,307 fps. ADI AR 2217 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 120.0 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-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, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .270 WSM with the .277 | 120gr | Barnes BND SPIT-FIRE 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.