Load Specifications
Load data in caliber .270 WSM with .277 | 100gr | Lehigh Defense Controlled Chaos bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 60 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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 56,275 psi | 88% | 3294 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,419 psi | 87% | 3304 fps | 96.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 3350 fps | 97.8% |
| Accurate 4064 | <<locked>> | 84% | 56,434 psi | 88% | 3350 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,825 psi | 87% | 3428 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 82% | 56,985 psi | 89% | 3406 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 57,624 psi | 90% | 3399 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,463 psi | 88% | 3527 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,390 psi | 87% | 3376 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,579 psi | 87% | 3399 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,882 psi | 86% | 3468 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,405 psi | 88% | 3510 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,545 psi | 78% | 3363 fps | 99.7% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,918 psi | 69% | 3248 fps | 96.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3576 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,550 psi | 89% | 3409 fps | 99.5% |
| Bofors RP3 | <<locked>> | 86% | 56,840 psi | 89% | 3406 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 55,912 psi | 88% | 3356 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 86% | 56,739 psi | 89% | 3402 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 92% | 56,869 psi | 89% | 3461 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 90% | 56,623 psi | 89% | 3412 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 82% | 57,551 psi | 90% | 3419 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,434 psi | 87% | 3392 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,479 psi | 90% | 3451 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,232 psi | 90% | 3494 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 57% | 2178 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,723 psi | 86% | 3353 fps | 99.9% |
| IMR 4064 | <<locked>> | 86% | 57,290 psi | 90% | 3386 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,536 psi | 89% | 3350 fps | 97.4% |
| IMR 4350 | <<locked>> | 94% | 56,173 psi | 88% | 3379 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,898 psi | 89% | 3383 fps | 97.4% |
| IMR 4831 | <<locked>> | 94% | 55,593 psi | 87% | 3406 fps | 99.3% |
| IMR 4895 | <<locked>> | 84% | 56,985 psi | 89% | 3435 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 55,288 psi | 87% | 3314 fps | 99.8% |
| Lovex S062 | <<locked>> | 84% | 54,882 psi | 86% | 3337 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,566 psi | 90% | 3389 fps | 98.7% |
| Lovex S070 | <<locked>> | 92% | 55,651 psi | 87% | 3373 fps | 97.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,397 psi | 71% | 3182 fps | 95.9% |
| Norma 201 | <<locked>> | 82% | 56,217 psi | 88% | 3353 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,275 psi | 88% | 3346 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,998 psi | 86% | 3386 fps | 99.8% |
| Norma MRPᴾ | <<locked>> | 100% | 55,506 psi | 87% | 3514 fps | 97.3% |
| Norma URP | <<locked>> | 94% | 56,971 psi | 89% | 3455 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 84% | 55,158 psi | 86% | 3399 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 94% | 55,738 psi | 87% | 3445 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 59% | 2231 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,507 psi | 89% | 3376 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,188 psi | 88% | 3474 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,985 psi | 88% | 3510 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,708 psi | 86% | 3432 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,782 psi | 89% | 3517 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 84% | 57,072 psi | 89% | 3353 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,942 psi | 89% | 3396 fps | 100% |
| Rottweil R 907 | <<locked>> | 90% | 55,912 psi | 88% | 3356 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,566 psi | 90% | 3389 fps | 98.7% |
| Shooters World Precision | <<locked>> | 84% | 54,882 psi | 86% | 3337 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,651 psi | 87% | 3373 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,464 psi | 90% | 3445 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,274 psi | 87% | 3366 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,376 psi | 88% | 3274 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,101 psi | 89% | 3271 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,580 psi | 90% | 3330 fps | 97.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,246 psi | 90% | 3465 fps | 96.1% |
| Somchem S335 | <<locked>> | 82% | 56,405 psi | 88% | 3271 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,595 psi | 90% | 3383 fps | 99.9% |
| Somchem S355 | <<locked>> | 88% | 56,478 psi | 89% | 3386 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,956 psi | 88% | 3465 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,550 psi | 87% | 3386 fps | 96.7% |
| Vihtavuori N133 | <<locked>> | 82% | 56,536 psi | 89% | 3255 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,753 psi | 89% | 3314 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,797 psi | 89% | 3320 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,566 psi | 90% | 3356 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,796 psi | 87% | 3392 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 84% | 55,419 psi | 87% | 3314 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,172 psi | 86% | 3396 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,724 psi | 87% | 3465 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,201 psi | 87% | 3350 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,174 psi | 90% | 3465 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,411 psi | 71% | 3409 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,405 psi | 87% | 3376 fps | 99.9% |
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 2495 | <<locked>> | 80% | 53,098 psi | 83% | 3245 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 52,243 psi | 82% | 3241 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 44,570 psi | 70% | 3166 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 50,140 psi | 79% | 3241 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,276 psi | 60% | 3051 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 53,650 psi | 84% | 3346 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 45,672 psi | 72% | 3166 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,487 psi | 78% | 3389 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,470 psi | 73% | 3205 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,429 psi | 77% | 3278 fps | 98.9% |
| Alliant Reloder-16 | 53 gr | 80% | 36,579 psi | 57% | 3035 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,002 psi | 64% | 3186 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 86% | 33,199 psi | 52% | 2949 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 98% | 41,582 psi | 65% | 3189 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 90% | 40,712 psi | 64% | 3222 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,011 psi | 83% | 3346 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 47,398 psi | 74% | 3228 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 49,719 psi | 78% | 3235 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 47,456 psi | 74% | 3222 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 47,195 psi | 74% | 3264 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 53,243 psi | 83% | 3346 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 54,172 psi | 85% | 3360 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,389 psi | 54% | 2930 fps | 96.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,560 psi | 79% | 3327 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 49,850 psi | 78% | 3346 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1955 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,401 psi | 81% | 3291 fps | 99.7% |
| IMR 4064 | <<locked>> | 80% | 48,022 psi | 75% | 3209 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,096 psi | 79% | 3225 fps | 96% |
| IMR 4350 | <<locked>> | 90% | 49,995 psi | 78% | 3261 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 47,703 psi | 75% | 3199 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 36,492 psi | 57% | 2986 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 50,604 psi | 79% | 3317 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 52,286 psi | 82% | 3258 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 48,791 psi | 76% | 3222 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 43,279 psi | 68% | 3097 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 46,659 psi | 73% | 3192 fps | 95.4% |
| Lovex S071 | <<locked>> | 98% | 42,772 psi | 67% | 3127 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 53,098 psi | 83% | 3297 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,156 psi | 83% | 3294 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,863 psi | 77% | 3264 fps | 99.2% |
| Norma MRP | <<locked>> | 96% | 48,733 psi | 76% | 3376 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 37,376 psi | 59% | 3031 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 48,559 psi | 76% | 3274 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 43,584 psi | 68% | 3189 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 2005 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,181 psi | 74% | 3192 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,721 psi | 83% | 3409 fps | 99.3% |
| ReloadSwiss RS 60 | 57.1 gr | 80% | 43,250 psi | 68% | 3258 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 39,740 psi | 62% | 3110 fps | 95.7% |
| ReloadSwiss RS 70 | 60.8 gr | 84% | 41,133 psi | 64% | 3169 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 50,734 psi | 80% | 3241 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 44,759 psi | 70% | 3163 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 49,719 psi | 78% | 3235 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 43,279 psi | 68% | 3097 fps | 95.7% |
| Shooters World Precision | <<locked>> | 80% | 48,791 psi | 76% | 3222 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 46,659 psi | 73% | 3192 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,875 psi | 70% | 3202 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,054 psi | 82% | 3307 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,200 psi | 83% | 3222 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,194 psi | 71% | 3064 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 48,051 psi | 75% | 3150 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,563 psi | 84% | 3396 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 53,417 psi | 84% | 3225 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,940 psi | 85% | 3320 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 44,875 psi | 70% | 3159 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 34,156 psi | 54% | 2986 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 49,052 psi | 77% | 3261 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 53,388 psi | 84% | 3205 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,444 psi | 79% | 3212 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,444 psi | 79% | 3215 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,743 psi | 67% | 3077 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 38,653 psi | 61% | 3028 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 49,095 psi | 77% | 3205 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,464 psi | 60% | 3031 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 86% | 36,506 psi | 57% | 3045 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,855 psi | 59% | 2986 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 47,427 psi | 74% | 3271 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 31,894 psi | 50% | 2986 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,098 psi | 82% | 3314 fps | 99.8% |
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 | 100gr | Lehigh Defense Controlled Chaos. Alliant Reloder-26 delivers the highest muzzle velocity at 3,576 fps; across all powders the maximum-charge window runs from 2,178 fps to 3,576 fps. Accurate 3100 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 57–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.277" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, 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-16, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .270 WSM with the .277 | 100gr | 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.