Load Specifications
Load data in caliber .270 WSM with .277 | 100gr | Barnes Solid bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-16 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% | 56,840 psi | 89% | 3304 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,666 psi | 87% | 3307 fps | 96.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,215 psi | 85% | 3356 fps | 97.9% |
| Accurate 4064 | <<locked>> | 84% | 56,637 psi | 89% | 3356 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,999 psi | 88% | 3432 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 82% | 57,174 psi | 90% | 3412 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 54,636 psi | 86% | 3350 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,942 psi | 89% | 3540 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,854 psi | 88% | 3389 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,854 psi | 88% | 3406 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,317 psi | 87% | 3478 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,884 psi | 89% | 3517 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,980 psi | 78% | 3373 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,208 psi | 69% | 3258 fps | 96.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,116 psi | 90% | 3583 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,724 psi | 89% | 3412 fps | 99.5% |
| Bofors RP3 | <<locked>> | 86% | 57,087 psi | 89% | 3406 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 56,159 psi | 88% | 3363 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 86% | 57,290 psi | 90% | 3415 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 92% | 57,334 psi | 90% | 3468 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 90% | 56,768 psi | 89% | 3415 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,941 psi | 88% | 3402 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,682 psi | 90% | 3458 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,624 psi | 90% | 3501 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 57% | 2182 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,911 psi | 86% | 3360 fps | 99.9% |
| IMR 4064 | <<locked>> | 86% | 57,522 psi | 90% | 3389 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,710 psi | 89% | 3356 fps | 97.5% |
| IMR 4350 | <<locked>> | 94% | 56,260 psi | 88% | 3383 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,101 psi | 89% | 3389 fps | 97.5% |
| IMR 4831 | <<locked>> | 94% | 56,086 psi | 88% | 3415 fps | 99.4% |
| IMR 4895 | <<locked>> | 84% | 57,232 psi | 90% | 3438 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 55,767 psi | 87% | 3323 fps | 99.8% |
| Lovex S062 | <<locked>> | 84% | 55,071 psi | 86% | 3340 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,650 psi | 86% | 3337 fps | 98.3% |
| Lovex S070 | <<locked>> | 92% | 55,811 psi | 87% | 3376 fps | 97.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,788 psi | 72% | 3192 fps | 96.1% |
| Norma 201 | <<locked>> | 82% | 56,710 psi | 89% | 3363 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,811 psi | 89% | 3356 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,172 psi | 86% | 3389 fps | 99.8% |
| Norma MRPᴾ | <<locked>> | 100% | 56,014 psi | 88% | 3524 fps | 97.4% |
| Norma URP | <<locked>> | 94% | 57,392 psi | 90% | 3465 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 84% | 55,608 psi | 87% | 3409 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 94% | 56,144 psi | 88% | 3451 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,347 psi | 59% | 2234 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,884 psi | 89% | 3383 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,434 psi | 88% | 3478 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,130 psi | 88% | 3514 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,100 psi | 86% | 3438 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,087 psi | 89% | 3524 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 84% | 57,276 psi | 90% | 3360 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,188 psi | 90% | 3402 fps | 100% |
| Rottweil R 907 | <<locked>> | 90% | 56,159 psi | 88% | 3363 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,650 psi | 86% | 3337 fps | 98.3% |
| Shooters World Precision | <<locked>> | 84% | 55,071 psi | 86% | 3340 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,811 psi | 87% | 3376 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,667 psi | 90% | 3451 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,434 psi | 87% | 3369 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,608 psi | 89% | 3281 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,334 psi | 90% | 3274 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,711 psi | 90% | 3333 fps | 97.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3471 fps | 96.2% |
| Somchem S335 | <<locked>> | 82% | 56,869 psi | 89% | 3281 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,927 psi | 89% | 3396 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,405 psi | 88% | 3474 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,724 psi | 87% | 3392 fps | 96.8% |
| Vihtavuori N133 | <<locked>> | 82% | 56,782 psi | 89% | 3258 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,014 psi | 89% | 3317 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,087 psi | 89% | 3323 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,578 psi | 86% | 3307 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,927 psi | 88% | 3392 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 84% | 55,593 psi | 87% | 3320 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,622 psi | 87% | 3406 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,014 psi | 88% | 3468 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,550 psi | 87% | 3356 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,334 psi | 90% | 3468 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,788 psi | 72% | 3419 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,593 psi | 87% | 3379 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% | 53,476 psi | 84% | 3251 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,342 psi | 77% | 3189 fps | 95% |
| Accurate 3100 | <<locked>> | 92% | 42,235 psi | 66% | 3114 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 50,401 psi | 79% | 3248 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,479 psi | 60% | 3058 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 53,867 psi | 84% | 3353 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 45,876 psi | 72% | 3173 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,922 psi | 78% | 3402 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,702 psi | 73% | 3212 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,647 psi | 78% | 3284 fps | 99% |
| Alliant Reloder-16 | 53.3 gr | 80% | 36,767 psi | 58% | 3041 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,191 psi | 65% | 3189 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 33,330 psi | 52% | 2953 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 98% | 41,829 psi | 66% | 3196 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 88% | 38,421 psi | 60% | 3156 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,417 psi | 84% | 3353 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 47,645 psi | 75% | 3235 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 49,893 psi | 78% | 3241 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 47,630 psi | 75% | 3225 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 47,413 psi | 74% | 3271 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 88% | 53,447 psi | 84% | 3350 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,577 psi | 54% | 2936 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,749 psi | 80% | 3333 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 50,154 psi | 79% | 3353 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1959 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,706 psi | 81% | 3297 fps | 99.7% |
| IMR 4064 | <<locked>> | 80% | 48,240 psi | 76% | 3215 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,270 psi | 79% | 3232 fps | 96.1% |
| IMR 4350 | <<locked>> | 90% | 50,125 psi | 79% | 3264 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 48,109 psi | 75% | 3209 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 36,695 psi | 57% | 2992 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 50,865 psi | 80% | 3320 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 52,504 psi | 82% | 3264 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 49,023 psi | 77% | 3228 fps | 99.8% |
| Lovex S065 | <<locked>> | 80% | 41,133 psi | 64% | 3045 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 47,021 psi | 74% | 3202 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 43,236 psi | 68% | 3136 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 53,330 psi | 84% | 3301 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,447 psi | 84% | 3301 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,081 psi | 77% | 3271 fps | 99.2% |
| Norma MRP | <<locked>> | 96% | 49,124 psi | 77% | 3383 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 37,579 psi | 59% | 3035 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 48,979 psi | 77% | 3284 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 43,714 psi | 69% | 3196 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 2005 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,384 psi | 74% | 3196 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,953 psi | 83% | 3415 fps | 99.3% |
| ReloadSwiss RS 60 | 57.4 gr | 80% | 43,497 psi | 68% | 3264 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 40,161 psi | 63% | 3123 fps | 95.9% |
| ReloadSwiss RS 70 | 61.2 gr | 84% | 41,452 psi | 65% | 3182 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 50,966 psi | 80% | 3245 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 45,034 psi | 71% | 3169 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 49,893 psi | 78% | 3241 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,133 psi | 64% | 3045 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 49,023 psi | 77% | 3228 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 47,021 psi | 74% | 3202 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,150 psi | 71% | 3209 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,228 psi | 82% | 3310 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,374 psi | 84% | 3225 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,440 psi | 71% | 3071 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 48,182 psi | 76% | 3153 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,041 psi | 85% | 3406 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 53,650 psi | 84% | 3228 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,092 psi | 71% | 3166 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 34,418 psi | 54% | 2995 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 49,472 psi | 78% | 3271 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 53,650 psi | 84% | 3209 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,734 psi | 80% | 3215 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,662 psi | 79% | 3219 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,946 psi | 67% | 3084 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 38,841 psi | 61% | 3035 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,327 psi | 77% | 3209 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,696 psi | 61% | 3038 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 36,854 psi | 58% | 3058 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,174 psi | 60% | 2995 fps | 97.8% |
| Winchester 760 | <<locked>> | 86% | 47,587 psi | 75% | 3278 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 32,024 psi | 50% | 2995 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,315 psi | 82% | 3320 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 78 powders for .270 WSM loaded with the .277 | 100gr | Barnes Solid. Alliant Reloder-26 delivers the highest muzzle velocity at 3,583 fps; across all powders the maximum-charge window runs from 2,182 fps to 3,583 fps. Accurate 3100 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 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. ReloadSwiss RS 60, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .270 WSM with the .277 | 100gr | Barnes Solid 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.