Load Specifications
Load data in caliber .270 WSM with .277 | 90gr | Speer MHP bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 and Alliant Reloder-17.
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% | 55,143 psi | 86% | 3435 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 3468 fps | 97% |
| Accurate 4064 | <<locked>> | 84% | 55,085 psi | 86% | 3484 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,389 psi | 85% | 3547 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 82% | 55,782 psi | 87% | 3540 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 88% | 56,710 psi | 89% | 3537 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,638 psi | 90% | 3543 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,274 psi | 87% | 3658 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,536 psi | 89% | 3556 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,725 psi | 90% | 3573 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,505 psi | 85% | 3527 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,145 psi | 90% | 3661 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,288 psi | 87% | 3638 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,573 psi | 76% | 3481 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,506 psi | 87% | 3691 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,521 psi | 87% | 3540 fps | 98.9% |
| Bofors RP3 | <<locked>> | 86% | 55,709 psi | 87% | 3537 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 86% | 55,840 psi | 88% | 3537 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 92% | 55,796 psi | 87% | 3586 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 82% | 56,376 psi | 88% | 3556 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,653 psi | 90% | 3579 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,130 psi | 88% | 3583 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 92% | 56,086 psi | 88% | 3609 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 57% | 2303 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,884 psi | 89% | 3547 fps | 99.8% |
| IMR 3031 | <<locked>> | 82% | 56,579 psi | 89% | 3547 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,260 psi | 88% | 3520 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,405 psi | 87% | 3474 fps | 96.4% |
| IMR 4350 | <<locked>> | 94% | 55,027 psi | 86% | 3501 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,970 psi | 88% | 3510 fps | 96.5% |
| IMR 4831 | <<locked>> | 94% | 54,389 psi | 85% | 3527 fps | 98.8% |
| IMR 4895 | <<locked>> | 84% | 55,840 psi | 88% | 3570 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 82% | 57,638 psi | 90% | 3543 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,826 psi | 89% | 3524 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,696 psi | 90% | 3507 fps | 99.7% |
| Lovex S062 | <<locked>> | 86% | 56,942 psi | 89% | 3527 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,536 psi | 89% | 3517 fps | 98% |
| Lovex S070 | <<locked>> | 94% | 57,696 psi | 90% | 3556 fps | 97.2% |
| Norma 201 | <<locked>> | 82% | 55,216 psi | 87% | 3491 fps | 99.9% |
| Norma 202 | <<locked>> | 82% | 55,463 psi | 87% | 3491 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,377 psi | 90% | 3579 fps | 99.7% |
| Norma MRPᴾ | <<locked>> | 100% | 54,491 psi | 85% | 3629 fps | 96.3% |
| Norma URP | <<locked>> | 94% | 55,753 psi | 87% | 3579 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 84% | 54,012 psi | 85% | 3527 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 94% | 54,737 psi | 86% | 3566 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,086 psi | 58% | 2359 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,477 psi | 87% | 3501 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,766 psi | 86% | 3602 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,795 psi | 86% | 3645 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,246 psi | 90% | 3622 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,753 psi | 87% | 3638 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 84% | 55,970 psi | 88% | 3491 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 88% | 55,651 psi | 87% | 3527 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,536 psi | 89% | 3517 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,826 psi | 89% | 3524 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,942 psi | 89% | 3527 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,696 psi | 90% | 3556 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,202 psi | 88% | 3573 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,537 psi | 90% | 3533 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,638 psi | 90% | 3560 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,347 psi | 87% | 3415 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,101 psi | 88% | 3409 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,536 psi | 89% | 3455 fps | 96.7% |
| Somchem S335 | <<locked>> | 82% | 55,448 psi | 87% | 3412 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,666 psi | 89% | 3517 fps | 99.6% |
| Somchem S355 | <<locked>> | 88% | 55,434 psi | 87% | 3517 fps | 99.7% |
| Somchem S365 | <<locked>> | 96% | 54,607 psi | 86% | 3593 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 55,477 psi | 87% | 3396 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,622 psi | 87% | 3455 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,767 psi | 87% | 3458 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,536 psi | 89% | 3491 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,418 psi | 85% | 3510 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 86% | 57,682 psi | 90% | 3504 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,479 psi | 90% | 3579 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,476 psi | 85% | 3589 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,172 psi | 85% | 3474 fps | 99.8% |
| Winchester 760 | <<locked>> | 92% | 55,796 psi | 87% | 3586 fps | 96.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,628 psi | 70% | 3517 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,317 psi | 85% | 3504 fps | 99.7% |
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% | 51,967 psi | 81% | 3383 fps | 100% |
| Accurate 3100 | <<locked>> | 96% | 46,398 psi | 73% | 3337 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 49,052 psi | 77% | 3373 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 39,682 psi | 62% | 3222 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 52,576 psi | 82% | 3478 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 44,744 psi | 70% | 3287 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,331 psi | 85% | 3481 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,530 psi | 76% | 3514 fps | 98.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,330 psi | 84% | 3497 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,585 psi | 71% | 3333 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,472 psi | 76% | 3406 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 40,176 psi | 63% | 3271 fps | 95.5% |
| Alliant Reloder-17 | 59.9 gr | 80% | 40,059 psi | 63% | 3294 fps | 97.3% |
| Alliant Reloder-23 | <<locked>> | 90% | 36,303 psi | 57% | 3169 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 92% | 42,453 psi | 67% | 3392 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,025 psi | 82% | 3471 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 46,325 psi | 73% | 3350 fps | 99% |
| Hodgdon H380 | <<locked>> | 80% | 46,340 psi | 73% | 3340 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 90% | 52,344 psi | 82% | 3514 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 53,171 psi | 83% | 3494 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 35,621 psi | 56% | 3094 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,443 psi | 77% | 3455 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 90% | 52,330 psi | 82% | 3530 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 43% | 2070 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,502 psi | 79% | 3422 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 53,403 psi | 84% | 3494 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,036 psi | 74% | 3333 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,315 psi | 82% | 3415 fps | 95.7% |
| IMR 4350 | <<locked>> | 92% | 51,953 psi | 81% | 3438 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 52,576 psi | 82% | 3442 fps | 95.7% |
| IMR 4831 | <<locked>> | 84% | 40,161 psi | 63% | 3215 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 49,603 psi | 78% | 3442 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 54,331 psi | 85% | 3481 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 53,258 psi | 83% | 3465 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,314 psi | 80% | 3386 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 47,790 psi | 75% | 3350 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 44,918 psi | 70% | 3271 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 48,515 psi | 76% | 3369 fps | 95% |
| Norma 201 | <<locked>> | 80% | 52,054 psi | 82% | 3428 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 52,257 psi | 82% | 3435 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,863 psi | 75% | 3389 fps | 98.5% |
| Norma MRP | <<locked>> | 98% | 51,024 psi | 80% | 3556 fps | 95.3% |
| Norma URP | <<locked>> | 84% | 41,220 psi | 65% | 3264 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 47,616 psi | 75% | 3399 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 48,138 psi | 75% | 3432 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,876 psi | 44% | 2119 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 49,226 psi | 77% | 3373 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,329 psi | 80% | 3533 fps | 98.6% |
| ReloadSwiss RS 60 | 59.9 gr | 80% | 42,308 psi | 66% | 3373 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 41,423 psi | 65% | 3287 fps | 95.3% |
| ReloadSwiss RS 70 | 65.4 gr | 86% | 43,033 psi | 67% | 3350 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 49,792 psi | 78% | 3373 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 43,845 psi | 69% | 3284 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 44,918 psi | 70% | 3271 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,258 psi | 83% | 3465 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,790 psi | 75% | 3350 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 88% | 48,515 psi | 76% | 3369 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,729 psi | 69% | 3317 fps | 97.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,809 psi | 84% | 3465 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,894 psi | 80% | 3432 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,344 psi | 82% | 3360 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,411 psi | 70% | 3196 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 50,024 psi | 78% | 3327 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 52,344 psi | 82% | 3360 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,939 psi | 83% | 3451 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 43,859 psi | 69% | 3278 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 33,373 psi | 52% | 3091 fps | 96.4% |
| Vihtavuori N133 | <<locked>> | 80% | 52,533 psi | 82% | 3350 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,472 psi | 78% | 3350 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,574 psi | 78% | 3350 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,959 psi | 66% | 3199 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 82% | 40,089 psi | 63% | 3196 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 48,109 psi | 75% | 3333 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 42,380 psi | 66% | 3264 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 37,869 psi | 59% | 3215 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,144 psi | 58% | 3094 fps | 96.7% |
| Winchester 760 | <<locked>> | 88% | 49,356 psi | 77% | 3451 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 34,998 psi | 55% | 3212 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,966 psi | 80% | 3442 fps | 99.4% |
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 105 powders for .270 WSM loaded with the .277 | 90gr | Speer MHP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,691 fps; across all powders the maximum-charge window runs from 2,303 fps to 3,691 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 90.0 gr projectile in 0.277" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2213 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. ReloadSwiss RS 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .270 WSM with the .277 | 90gr | Speer MHP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate High Country, ADI AR 2209, ADI AR 2213 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.