Load Specifications
Load data in caliber .270 WSM with .277 | 112gr | Lehigh Defense Controlled Chaos bullet and 78 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% | 55,840 psi | 88% | 3173 fps | 97.6% |
| Accurate 3100 | <<locked>> | 98% | 55,405 psi | 87% | 3232 fps | 99% |
| Accurate 4064 | <<locked>> | 82% | 57,276 psi | 90% | 3199 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,188 psi | 90% | 3297 fps | 99.9% |
| Accurate High Country | <<locked>> | 96% | 55,303 psi | 87% | 3366 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 84% | 54,824 psi | 86% | 3199 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 96% | 56,550 psi | 89% | 3310 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,551 psi | 90% | 3392 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,869 psi | 89% | 3310 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,304 psi | 88% | 3235 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,289 psi | 88% | 3255 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,217 psi | 88% | 3340 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,969 psi | 85% | 3307 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,173 psi | 88% | 3301 fps | 97.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3366 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,360 psi | 85% | 3304 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,834 psi | 75% | 3215 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,766 psi | 86% | 3389 fps | 99.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,997 psi | 83% | 3284 fps | 96.4% |
| Bofors RP3 | <<locked>> | 82% | 54,273 psi | 85% | 3202 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3366 fps | 97.5% |
| Bofors RP7 | <<locked>> | 88% | 56,362 psi | 88% | 3222 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 84% | 57,508 psi | 90% | 3268 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 88% | 54,578 psi | 86% | 3271 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 88% | 57,406 psi | 90% | 3281 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,985 psi | 89% | 3261 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 54,259 psi | 85% | 3297 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,840 psi | 58% | 2073 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,725 psi | 90% | 3238 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,710 psi | 89% | 3209 fps | 98.4% |
| IMR 4350 | <<locked>> | 92% | 56,942 psi | 89% | 3251 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,319 psi | 90% | 3248 fps | 98.5% |
| IMR 4831 | <<locked>> | 92% | 56,811 psi | 89% | 3274 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 57,638 psi | 90% | 3284 fps | 100% |
| Lovex S062 | <<locked>> | 82% | 55,347 psi | 87% | 3189 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,114 psi | 86% | 3199 fps | 99.1% |
| Lovex S070 | <<locked>> | 90% | 56,405 psi | 88% | 3241 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,908 psi | 78% | 3136 fps | 98.2% |
| Norma 203B | <<locked>> | 82% | 55,680 psi | 87% | 3241 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,302 psi | 85% | 3241 fps | 96.4% |
| Norma MRP | <<locked>> | 98% | 57,029 psi | 89% | 3399 fps | 98.6% |
| Norma URP | <<locked>> | 90% | 54,853 psi | 86% | 3264 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 82% | 56,144 psi | 88% | 3261 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,260 psi | 88% | 3350 fps | 96% |
| Ramshot Hunter | <<locked>> | 92% | 57,000 psi | 89% | 3317 fps | 99.2% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,010 psi | 80% | 3219 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,753 psi | 59% | 2126 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,145 psi | 90% | 3241 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,043 psi | 89% | 3363 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,289 psi | 88% | 3307 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,682 psi | 90% | 3386 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,340 psi | 74% | 3235 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 82% | 57,406 psi | 90% | 3205 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,636 psi | 86% | 3202 fps | 100% |
| Rottweil R 905 | <<locked>> | 96% | 55,709 psi | 87% | 3291 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 88% | 56,362 psi | 88% | 3222 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,114 psi | 86% | 3199 fps | 99.1% |
| Shooters World Precision | <<locked>> | 82% | 55,347 psi | 87% | 3189 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,405 psi | 88% | 3241 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,013 psi | 86% | 3248 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,595 psi | 90% | 3120 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,795 psi | 86% | 3143 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,216 psi | 87% | 3284 fps | 97% |
| Somchem S355 | <<locked>> | 86% | 57,421 psi | 90% | 3248 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 54,331 psi | 85% | 3278 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,869 psi | 89% | 3271 fps | 98% |
| Vihtavuori N135 | <<locked>> | 82% | 57,551 psi | 90% | 3159 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,276 psi | 90% | 3166 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,969 psi | 86% | 3159 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,782 psi | 89% | 3258 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,593 psi | 87% | 3232 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 82% | 55,941 psi | 88% | 3166 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,202 psi | 88% | 3264 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 98% | 57,667 psi | 90% | 3340 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,985 psi | 88% | 3215 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,824 psi | 86% | 3274 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,038 psi | 78% | 3373 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,478 psi | 89% | 3251 fps | 97% |
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% | 52,373 psi | 82% | 3110 fps | 97% |
| Accurate 3100 | <<locked>> | 86% | 38,566 psi | 60% | 2890 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 54,099 psi | 85% | 3150 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,959 psi | 66% | 3002 fps | 97.9% |
| Accurate High Country | <<locked>> | 94% | 51,909 psi | 81% | 3301 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 48,921 psi | 77% | 3091 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 50,053 psi | 78% | 3186 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,766 psi | 84% | 3323 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 50,169 psi | 79% | 3182 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,096 psi | 79% | 3127 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,142 psi | 83% | 3202 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,552 psi | 62% | 2989 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,440 psi | 70% | 3123 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 49,661 psi | 78% | 3179 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 47,601 psi | 75% | 3179 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,530 psi | 48% | 2740 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 38,014 psi | 60% | 2969 fps | 95.5% |
| Alliant Reloder-26 | 60 gr | 82% | 34,664 psi | 54% | 2920 fps | 95% |
| Bofors RP15 | <<locked>> | 98% | 49,806 psi | 78% | 3222 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 51,285 psi | 80% | 3150 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 47,601 psi | 75% | 3179 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,831 psi | 70% | 2992 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 51,082 psi | 80% | 3150 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 42,627 psi | 67% | 3025 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 47,819 psi | 75% | 3097 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,405 psi | 59% | 2877 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 82% | 44,440 psi | 70% | 3094 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 44% | 1860 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,474 psi | 81% | 3130 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,403 psi | 84% | 3150 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 45,121 psi | 71% | 3022 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,469 psi | 71% | 3015 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 39,769 psi | 62% | 2936 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 54,520 psi | 85% | 3232 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 52,359 psi | 82% | 3136 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,947 psi | 69% | 2979 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 42,424 psi | 66% | 2959 fps | 95.5% |
| Lovex S071 | <<locked>> | 92% | 39,581 psi | 62% | 2917 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,620 psi | 82% | 3189 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 50,981 psi | 80% | 3179 fps | 95.6% |
| Norma MRP | 63.9 gr | 90% | 44,164 psi | 69% | 3136 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 40,698 psi | 64% | 2976 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 80% | 52,576 psi | 82% | 3202 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 52,634 psi | 82% | 3278 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 39,494 psi | 62% | 2956 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 47,587 psi | 75% | 3146 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 44% | 1903 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,618 psi | 79% | 3120 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,920 psi | 74% | 3186 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,031 psi | 64% | 3002 fps | 97.4% |
| ReloadSwiss RS 70 | 58 gr | 80% | 39,363 psi | 62% | 2995 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 44,382 psi | 70% | 3166 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 54,273 psi | 85% | 3153 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,515 psi | 76% | 3091 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 49,240 psi | 77% | 3166 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,831 psi | 70% | 2992 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,947 psi | 69% | 2979 fps | 97.2% |
| Shooters World Precision | <<locked>> | 80% | 52,359 psi | 82% | 3136 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,424 psi | 66% | 2959 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,675 psi | 76% | 3133 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,341 psi | 76% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,134 psi | 68% | 2913 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 48,791 psi | 76% | 3159 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,298 psi | 76% | 3084 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 37,420 psi | 59% | 2940 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 44,701 psi | 70% | 3035 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 54,288 psi | 85% | 3110 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,114 psi | 85% | 3117 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 46,108 psi | 72% | 3005 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,974 psi | 66% | 2972 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 46,311 psi | 73% | 3054 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 52,707 psi | 83% | 3114 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,800 psi | 66% | 2976 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 33,750 psi | 53% | 2831 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,872 psi | 64% | 2930 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 42,859 psi | 67% | 3028 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 29,283 psi | 46% | 2782 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 94% | 49,574 psi | 78% | 3127 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 78 powders for .270 WSM loaded with the .277 | 112gr | Lehigh Defense Controlled Chaos. Norma MRP delivers the highest muzzle velocity at 3,399 fps; across all powders the maximum-charge window runs from 2,073 fps to 3,399 fps. Alliant Reloder-22 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 112.0 gr projectile in 0.277" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-22, Alliant Reloder-23, 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. Alliant Reloder-26, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .270 WSM with the .277 | 112gr | Lehigh Defense Controlled Chaos 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.