Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 100gr | Winchester Pointed Soft Point bullet and 96 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 70 and Hodgdon Superformance.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 54,317 psi | 85% | 3360 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,173 psi | 88% | 3412 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,617 psi | 78% | 3363 fps | 97.8% |
| Accurate 4064 | <<locked>> | 86% | 54,636 psi | 86% | 3415 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,622 psi | 87% | 3517 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 57,435 psi | 90% | 3507 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,143 psi | 86% | 3448 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,072 psi | 89% | 3553 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,144 psi | 88% | 3448 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,128 psi | 85% | 3579 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,898 psi | 88% | 3478 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,202 psi | 88% | 3504 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,130 psi | 88% | 3583 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,740 psi | 90% | 3619 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,927 psi | 88% | 3533 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,630 psi | 73% | 3396 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,930 psi | 64% | 3271 fps | 96.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,780 psi | 84% | 3612 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 53,838 psi | 84% | 3451 fps | 99.6% |
| Bofors RP3 | <<locked>> | 88% | 56,869 psi | 89% | 3494 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 56,260 psi | 88% | 3461 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,406 psi | 90% | 3425 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,217 psi | 88% | 3478 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,246 psi | 90% | 3507 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 54,099 psi | 85% | 3504 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 92% | 57,696 psi | 90% | 3524 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 54,520 psi | 85% | 3458 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,362 psi | 88% | 3491 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,694 psi | 86% | 3494 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,766 psi | 86% | 3540 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,824 psi | 56% | 2228 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,593 psi | 87% | 3461 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,766 psi | 86% | 3445 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,708 psi | 86% | 3432 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,012 psi | 85% | 3399 fps | 97.7% |
| IMR 4350 | <<locked>> | 96% | 57,159 psi | 90% | 3488 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,462 psi | 85% | 3428 fps | 97.7% |
| IMR 4831 | <<locked>> | 96% | 55,825 psi | 87% | 3501 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 57,696 psi | 90% | 3540 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 56,144 psi | 88% | 3448 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,244 psi | 85% | 3419 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,376 psi | 88% | 3422 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,737 psi | 86% | 3425 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,418 psi | 85% | 3425 fps | 98.8% |
| Lovex S070 | <<locked>> | 94% | 55,651 psi | 87% | 3468 fps | 98.2% |
| Norma 201 | <<locked>> | 84% | 56,115 psi | 88% | 3445 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,710 psi | 89% | 3442 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,506 psi | 87% | 3488 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,288 psi | 85% | 3474 fps | 96% |
| Norma MRPᴾ | <<locked>> | 100% | 52,591 psi | 82% | 3550 fps | 97.6% |
| Norma URP | <<locked>> | 94% | 54,099 psi | 85% | 3494 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 86% | 56,434 psi | 88% | 3510 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 56,826 psi | 89% | 3553 fps | 98.9% |
| Ramshot TAC | <<locked>> | 82% | 56,579 psi | 89% | 3465 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,521 psi | 89% | 3488 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,448 psi | 57% | 2280 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,406 psi | 90% | 3484 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,058 psi | 89% | 3583 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,145 psi | 90% | 3615 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,564 psi | 87% | 3537 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,215 psi | 85% | 3563 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 56,869 psi | 89% | 3425 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,898 psi | 89% | 3445 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,695 psi | 89% | 3484 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,085 psi | 86% | 3514 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 92% | 56,260 psi | 88% | 3461 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,418 psi | 85% | 3425 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,244 psi | 85% | 3419 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,737 psi | 86% | 3425 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,651 psi | 87% | 3468 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,766 psi | 86% | 3488 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,405 psi | 87% | 3442 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,101 psi | 88% | 3471 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,174 psi | 90% | 3373 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,592 psi | 86% | 3314 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,491 psi | 85% | 3369 fps | 97.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,592 psi | 86% | 3507 fps | 96.5% |
| Somchem S335 | <<locked>> | 84% | 56,739 psi | 89% | 3363 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,839 psi | 86% | 3425 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 56,695 psi | 89% | 3481 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 56,797 psi | 89% | 3560 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,898 psi | 88% | 3488 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 84% | 57,580 psi | 90% | 3353 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,826 psi | 89% | 3402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,566 psi | 90% | 3419 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,592 psi | 86% | 3396 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,594 psi | 89% | 3494 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 56,608 psi | 89% | 3445 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,854 psi | 88% | 3406 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,695 psi | 87% | 3494 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,011 psi | 82% | 3488 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,826 psi | 89% | 3458 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,246 psi | 90% | 3501 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,317 psi | 85% | 3507 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,221 psi | 66% | 3428 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,289 psi | 88% | 3478 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 47,543 psi | 75% | 3245 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,108 psi | 72% | 3212 fps | 95% |
| Accurate 3100 | <<locked>> | 94% | 40,321 psi | 63% | 3163 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 44,947 psi | 70% | 3241 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 36,289 psi | 57% | 3097 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 50,662 psi | 79% | 3383 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 42,931 psi | 67% | 3199 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 96% | 49,777 psi | 78% | 3412 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,707 psi | 83% | 3389 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,978 psi | 74% | 3432 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,018 psi | 67% | 3225 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,195 psi | 72% | 3307 fps | 98.9% |
| Alliant Reloder-16 | 57 gr | 82% | 35,694 psi | 56% | 3110 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,797 psi | 59% | 3199 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 96% | 49,139 psi | 77% | 3399 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 88% | 31,488 psi | 49% | 2995 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 98% | 38,247 psi | 60% | 3196 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 36,970 psi | 58% | 3215 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,386 psi | 79% | 3386 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 43,265 psi | 68% | 3235 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 46,470 psi | 73% | 3264 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,983 psi | 85% | 3369 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,533 psi | 82% | 3415 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,787 psi | 69% | 3238 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 44,295 psi | 69% | 3297 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 88% | 50,807 psi | 80% | 3392 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 51,184 psi | 80% | 3396 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,864 psi | 48% | 2920 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,587 psi | 75% | 3360 fps | 99.8% |
| Hodgdon Superformance | 69.6 gr | 88% | 47,152 psi | 74% | 3386 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,672 psi | 42% | 1998 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,936 psi | 77% | 3337 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 51,227 psi | 80% | 3383 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,078 psi | 71% | 3241 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,456 psi | 74% | 3264 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 47,311 psi | 74% | 3297 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,150 psi | 71% | 3238 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 34,940 psi | 55% | 3041 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 47,384 psi | 74% | 3343 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 52,707 psi | 83% | 3389 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,604 psi | 79% | 3353 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,763 psi | 78% | 3301 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 45,194 psi | 71% | 3245 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 39,697 psi | 62% | 3110 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 43,192 psi | 68% | 3209 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 49,385 psi | 77% | 3323 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,893 psi | 78% | 3323 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,571 psi | 71% | 3291 fps | 99.2% |
| Norma 204 | <<locked>> | 92% | 50,821 psi | 80% | 3409 fps | 95.2% |
| Norma MRP | <<locked>> | 96% | 45,803 psi | 72% | 3402 fps | 95.8% |
| Norma URP | <<locked>> | 82% | 36,289 psi | 57% | 3097 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 45,701 psi | 72% | 3307 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 40,538 psi | 64% | 3212 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 52,794 psi | 83% | 3396 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,866 psi | 83% | 3422 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,137 psi | 43% | 2047 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,048 psi | 69% | 3215 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,443 psi | 77% | 3438 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,190 psi | 63% | 3278 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,085 psi | 57% | 3110 fps | 95.3% |
| ReloadSwiss RS 70 | 63.8 gr | 84% | 38,043 psi | 60% | 3186 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 53,432 psi | 84% | 3369 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,992 psi | 74% | 3264 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 40,712 psi | 64% | 3169 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 98% | 51,488 psi | 81% | 3448 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 86% | 46,470 psi | 73% | 3264 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 39,697 psi | 62% | 3110 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,604 psi | 79% | 3353 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,194 psi | 71% | 3245 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 43,192 psi | 68% | 3209 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,713 psi | 65% | 3222 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,474 psi | 81% | 3369 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,066 psi | 77% | 3340 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,401 psi | 79% | 3261 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,409 psi | 66% | 3097 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 44,628 psi | 70% | 3173 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 51,010 psi | 80% | 3438 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 50,096 psi | 79% | 3255 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,242 psi | 80% | 3360 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 41,089 psi | 64% | 3169 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 30,458 psi | 48% | 2969 fps | 97% |
| Somchem S385 | <<locked>> | 94% | 45,687 psi | 72% | 3284 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 50,865 psi | 80% | 3248 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,036 psi | 74% | 3238 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,529 psi | 74% | 3248 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,363 psi | 62% | 3094 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 35,273 psi | 55% | 3035 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 53,069 psi | 83% | 3386 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,861 psi | 72% | 3232 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 37,347 psi | 59% | 3100 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 34,708 psi | 54% | 3091 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,824 psi | 55% | 2999 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 53,403 psi | 84% | 3438 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,295 psi | 69% | 3297 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 29,979 psi | 47% | 3025 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,124 psi | 77% | 3350 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 96 powders for .270 Weath. Mag. loaded with the .277 | 100gr | Winchester Pointed Soft Point. Alliant Reloder-17 delivers the highest muzzle velocity at 3,619 fps; across all powders the maximum-charge window runs from 2,228 fps to 3,619 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 100.0 gr projectile in 0.277" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 70, Hodgdon Superformance rank at the top here: for .270 Weath. Mag. with the .277 | 100gr | Winchester Pointed Soft Point 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.