Load Specifications
Load data in caliber .270 WSM with .277 | 95gr | Barnes TTSX BT bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and ReloadSwiss RS 60.
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 2015 | <<locked>> | 82% | 56,797 psi | 89% | 3363 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,363 psi | 90% | 3399 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,522 psi | 90% | 3455 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 57,261 psi | 90% | 3448 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,840 psi | 89% | 3520 fps | 99% |
| ADI AR 2206H | <<locked>> | 84% | 55,724 psi | 87% | 3461 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 90% | 56,478 psi | 89% | 3455 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,230 psi | 85% | 3402 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 82% | 55,651 psi | 87% | 3396 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,361 psi | 87% | 3586 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,188 psi | 90% | 3488 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,740 psi | 90% | 3514 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,637 psi | 89% | 3573 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,578 psi | 86% | 3553 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,527 psi | 70% | 3327 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,575 psi | 79% | 3524 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,535 psi | 87% | 3465 fps | 99% |
| Bofors RP3 | <<locked>> | 88% | 54,955 psi | 86% | 3448 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,680 psi | 87% | 3386 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,273 psi | 85% | 3435 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,274 psi | 87% | 3451 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 94% | 55,056 psi | 86% | 3497 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 84% | 56,260 psi | 88% | 3474 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,956 psi | 89% | 3491 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,941 psi | 88% | 3507 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 94% | 55,651 psi | 87% | 3527 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,926 psi | 56% | 2218 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,029 psi | 89% | 3471 fps | 99.8% |
| IMR 3031 | <<locked>> | 84% | 56,347 psi | 88% | 3468 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,941 psi | 88% | 3435 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,753 psi | 87% | 3406 fps | 96.6% |
| IMR 4350 | <<locked>> | 96% | 54,737 psi | 86% | 3419 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,811 psi | 87% | 3432 fps | 96.5% |
| IMR 4831 | <<locked>> | 98% | 56,840 psi | 89% | 3504 fps | 99.1% |
| IMR 4895 | <<locked>> | 86% | 55,434 psi | 87% | 3488 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 82% | 54,230 psi | 85% | 3402 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 84% | 56,260 psi | 88% | 3442 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,723 psi | 86% | 3376 fps | 99.5% |
| Lovex S062 | <<locked>> | 88% | 56,608 psi | 89% | 3445 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,985 psi | 88% | 3432 fps | 97.9% |
| Lovex S070 | <<locked>> | 96% | 57,145 psi | 90% | 3471 fps | 97.1% |
| Norma 201 | <<locked>> | 84% | 54,984 psi | 86% | 3409 fps | 99.9% |
| Norma 202 | <<locked>> | 84% | 55,172 psi | 86% | 3409 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,985 psi | 89% | 3497 fps | 99.7% |
| Norma URP | <<locked>> | 96% | 55,071 psi | 86% | 3494 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 88% | 57,522 psi | 90% | 3514 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 57,551 psi | 90% | 3547 fps | 97.9% |
| Ramshot TAC | <<locked>> | 82% | 54,520 psi | 85% | 3406 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,447 psi | 85% | 3435 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 57% | 2270 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,259 psi | 87% | 3422 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,418 psi | 85% | 3520 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,099 psi | 85% | 3556 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,289 psi | 88% | 3533 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,172 psi | 86% | 3556 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 82% | 56,101 psi | 88% | 3402 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,535 psi | 87% | 3406 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 90% | 54,737 psi | 86% | 3438 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,985 psi | 88% | 3432 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,260 psi | 88% | 3442 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,608 psi | 89% | 3445 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,145 psi | 90% | 3471 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,028 psi | 88% | 3501 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,363 psi | 90% | 3455 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,537 psi | 90% | 3481 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,434 psi | 87% | 3337 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,883 psi | 88% | 3330 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,072 psi | 88% | 3373 fps | 96.7% |
| Somchem S335 | <<locked>> | 84% | 55,477 psi | 87% | 3337 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,652 psi | 89% | 3442 fps | 99.6% |
| Somchem S355 | <<locked>> | 90% | 54,882 psi | 86% | 3435 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,130 psi | 90% | 3563 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 55,579 psi | 87% | 3320 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,085 psi | 86% | 3373 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,550 psi | 87% | 3379 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,188 psi | 88% | 3412 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 57,363 psi | 90% | 3491 fps | 99% |
| Vihtavuori N530 | <<locked>> | 82% | 54,708 psi | 86% | 3399 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 88% | 57,348 psi | 90% | 3425 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,855 psi | 89% | 3497 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 3425 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,682 psi | 90% | 3458 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,027 psi | 86% | 3458 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,347 psi | 87% | 3504 fps | 96.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,596 psi | 64% | 3337 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 57,580 psi | 90% | 3488 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 2015 | <<locked>> | 80% | 53,490 psi | 84% | 3310 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,529 psi | 74% | 3235 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,882 psi | 84% | 3392 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 44,802 psi | 70% | 3222 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 40,799 psi | 64% | 3189 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 49,240 psi | 77% | 3337 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,800 psi | 66% | 3146 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,082 psi | 80% | 3343 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 52,170 psi | 82% | 3340 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,150 psi | 71% | 3363 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,119 psi | 66% | 3182 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,020 psi | 71% | 3258 fps | 97.6% |
| Alliant Reloder-16 | 56 gr | 86% | 39,421 psi | 62% | 3182 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,767 psi | 58% | 3136 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 35,099 psi | 55% | 3074 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 41,176 psi | 65% | 3294 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,675 psi | 76% | 3330 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 42,583 psi | 67% | 3199 fps | 98.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,533 psi | 82% | 3330 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,908 psi | 80% | 3373 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 43,018 psi | 67% | 3192 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 51,547 psi | 81% | 3428 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 49,734 psi | 78% | 3350 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 34,519 psi | 54% | 3002 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,948 psi | 72% | 3310 fps | 99% |
| Hodgdon Superformance | <<locked>> | 92% | 51,895 psi | 81% | 3451 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,919 psi | 42% | 1991 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,398 psi | 74% | 3284 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 49,603 psi | 78% | 3350 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,918 psi | 69% | 3192 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,342 psi | 77% | 3278 fps | 95% |
| IMR 4350 | <<locked>> | 94% | 51,416 psi | 81% | 3353 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,647 psi | 78% | 3307 fps | 95% |
| IMR 4831 | <<locked>> | 86% | 38,957 psi | 61% | 3127 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 46,108 psi | 72% | 3297 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 51,082 psi | 80% | 3343 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 49,298 psi | 77% | 3320 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,704 psi | 76% | 3258 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 44,570 psi | 70% | 3212 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 44,251 psi | 69% | 3189 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 50,749 psi | 80% | 3350 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 48,544 psi | 76% | 3284 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 48,660 psi | 76% | 3291 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,425 psi | 70% | 3245 fps | 98% |
| Norma URP | <<locked>> | 86% | 40,234 psi | 63% | 3176 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 44,106 psi | 69% | 3255 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 47,297 psi | 74% | 3343 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 51,256 psi | 80% | 3343 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,126 psi | 80% | 3369 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 43% | 2041 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,704 psi | 76% | 3291 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,543 psi | 75% | 3379 fps | 98% |
| ReloadSwiss RS 60 | 56.1 gr | 80% | 38,957 psi | 61% | 3219 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 40,248 psi | 63% | 3199 fps | 95.1% |
| ReloadSwiss RS 70 | 62.7 gr | 88% | 42,337 psi | 66% | 3264 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 52,895 psi | 83% | 3343 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,470 psi | 73% | 3232 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 40,103 psi | 63% | 3130 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 44,251 psi | 69% | 3189 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,298 psi | 77% | 3320 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,570 psi | 70% | 3212 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 50,749 psi | 80% | 3350 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,408 psi | 63% | 3169 fps | 96.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,140 psi | 79% | 3320 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,587 psi | 75% | 3291 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,226 psi | 77% | 3228 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,452 psi | 65% | 3064 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,458 psi | 78% | 3245 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 49,110 psi | 77% | 3225 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,545 psi | 78% | 3310 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 40,480 psi | 63% | 3133 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 32,097 psi | 50% | 2992 fps | 95.9% |
| Vihtavuori N133 | <<locked>> | 80% | 49,472 psi | 78% | 3219 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,876 psi | 72% | 3212 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,151 psi | 72% | 3212 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,580 psi | 60% | 3054 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 41,756 psi | 65% | 3176 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 51,488 psi | 81% | 3340 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 44,889 psi | 70% | 3199 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 41,510 psi | 65% | 3179 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 38,363 psi | 60% | 3169 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,345 psi | 54% | 2953 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 51,503 psi | 81% | 3392 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 51,822 psi | 81% | 3435 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 94% | 33,649 psi | 53% | 3104 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,442 psi | 74% | 3301 fps | 99% |
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 86 powders for .270 WSM loaded with the .277 | 95gr | Barnes TTSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,586 fps; across all powders the maximum-charge window runs from 2,218 fps to 3,586 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 86 of the 86 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 95.0 gr projectile in 0.277" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon Hybrid 100V 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, Alliant Reloder-16, ReloadSwiss RS 60 rank at the top here: for .270 WSM with the .277 | 95gr | Barnes TTSX BT 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.