Load Specifications
Load data in caliber 6.8 Western with .277 | 110gr | Barnes TSX BT bullet and 98 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-17 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% | 56,318 psi | 87% | 3163 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,390 psi | 85% | 3179 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,421 psi | 88% | 3261 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 58,218 psi | 90% | 3248 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,050 psi | 72% | 3127 fps | 97.2% |
| Accurate 4064 | <<locked>> | 88% | 55,709 psi | 86% | 3235 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,956 psi | 88% | 3340 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 55,637 psi | 86% | 3271 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 57,159 psi | 88% | 3278 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,969 psi | 85% | 3314 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 84% | 58,015 psi | 89% | 3274 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,999 psi | 86% | 3196 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,347 psi | 87% | 3409 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,348 psi | 88% | 3297 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,914 psi | 89% | 3327 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,783 psi | 89% | 3406 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,506 psi | 85% | 3376 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,795 psi | 83% | 3291 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,498 psi | 68% | 3159 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,068 psi | 79% | 3360 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,028 psi | 86% | 3287 fps | 99.7% |
| Bofors RP3 | <<locked>> | 90% | 58,494 psi | 90% | 3320 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 57,986 psi | 89% | 3287 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,941 psi | 86% | 3202 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 58,320 psi | 90% | 3307 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,448 psi | 85% | 3274 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 94% | 55,898 psi | 86% | 3333 fps | 98% |
| Hodgdon H4350 | <<locked>> | 92% | 55,927 psi | 86% | 3291 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 84% | 56,231 psi | 87% | 3284 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 58,102 psi | 89% | 3320 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,608 psi | 87% | 3320 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,507 psi | 87% | 3373 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 55% | 2070 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,725 psi | 89% | 3291 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,768 psi | 87% | 3268 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,492 psi | 87% | 3261 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,999 psi | 86% | 3232 fps | 97.9% |
| IMR 4350 | <<locked>> | 96% | 55,187 psi | 85% | 3255 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,333 psi | 87% | 3261 fps | 97.9% |
| IMR 4831 | <<locked>> | 98% | 57,450 psi | 88% | 3327 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 55,753 psi | 86% | 3301 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 58,015 psi | 89% | 3274 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,767 psi | 86% | 3245 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 58,349 psi | 90% | 3251 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,318 psi | 87% | 3251 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,912 psi | 86% | 3255 fps | 98.9% |
| Lovex S070 | <<locked>> | 96% | 57,246 psi | 88% | 3294 fps | 98.3% |
| Norma 201 | <<locked>> | 86% | 57,769 psi | 89% | 3268 fps | 100% |
| Norma 202 | <<locked>> | 86% | 58,595 psi | 90% | 3268 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,130 psi | 88% | 3310 fps | 100% |
| Norma 204 | <<locked>> | 96% | 56,376 psi | 87% | 3314 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 50,241 psi | 77% | 3307 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 55,724 psi | 86% | 3323 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 88% | 58,349 psi | 90% | 3340 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 58,494 psi | 90% | 3379 fps | 99% |
| Ramshot TAC | <<locked>> | 84% | 58,682 psi | 90% | 3301 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 58,755 psi | 90% | 3320 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,158 psi | 56% | 2116 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,448 psi | 85% | 3248 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,143 psi | 85% | 3340 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,042 psi | 85% | 3376 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,927 psi | 88% | 3360 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,941 psi | 86% | 3392 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 58,407 psi | 90% | 3248 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 58,450 psi | 90% | 3268 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 58,349 psi | 90% | 3310 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,707 psi | 81% | 3271 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 94% | 57,986 psi | 89% | 3287 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,912 psi | 86% | 3255 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,767 psi | 86% | 3245 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,318 psi | 87% | 3251 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,246 psi | 88% | 3294 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,666 psi | 87% | 3320 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,305 psi | 88% | 3274 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,972 psi | 89% | 3301 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,419 psi | 85% | 3146 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,405 psi | 87% | 3146 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,115 psi | 86% | 3202 fps | 98% |
| Somchem S335 | <<locked>> | 86% | 58,479 psi | 90% | 3192 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,058 psi | 88% | 3264 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 58,233 psi | 90% | 3304 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 58,479 psi | 90% | 3386 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,388 psi | 82% | 3248 fps | 97% |
| Vihtavuori N130 | <<locked>> | 82% | 58,566 psi | 90% | 3156 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 55,898 psi | 86% | 3130 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 58,537 psi | 90% | 3225 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,883 psi | 86% | 3192 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,333 psi | 87% | 3225 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 58,262 psi | 90% | 3320 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 54,940 psi | 85% | 3215 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,754 psi | 89% | 3238 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,348 psi | 88% | 3323 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,487 psi | 76% | 3245 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 58,595 psi | 90% | 3287 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,564 psi | 85% | 3271 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,188 psi | 86% | 3340 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,030 psi | 62% | 3179 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 58,349 psi | 90% | 3307 fps | 100% |
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% | 52,765 psi | 81% | 3110 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,411 psi | 70% | 3018 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,519 psi | 82% | 3199 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,587 psi | 73% | 3054 fps | 95.3% |
| Accurate 3100 | <<locked>> | 96% | 40,857 psi | 63% | 2995 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 42,960 psi | 66% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 36,840 psi | 57% | 2933 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 48,950 psi | 75% | 3150 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 41,640 psi | 64% | 2976 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 98% | 51,416 psi | 79% | 3245 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,126 psi | 79% | 3159 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,286 psi | 80% | 3140 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,382 psi | 70% | 3196 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,394 psi | 64% | 2999 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,512 psi | 68% | 3074 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 36,579 psi | 56% | 2953 fps | 96% |
| Alliant Reloder-17 | 55.5 gr | 80% | 36,172 psi | 56% | 2963 fps | 97.6% |
| Alliant Reloder-19 | <<locked>> | 98% | 50,401 psi | 78% | 3228 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,937 psi | 49% | 2835 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 92% | 37,666 psi | 58% | 3051 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,675 psi | 75% | 3156 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 41,394 psi | 64% | 3002 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 47,805 psi | 74% | 3100 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,576 psi | 81% | 3143 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,792 psi | 78% | 3186 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,192 psi | 65% | 3012 fps | 97% |
| Hodgdon H414 | <<locked>> | 88% | 45,411 psi | 70% | 3130 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 88% | 48,965 psi | 75% | 3159 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 49,472 psi | 76% | 3163 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 31,589 psi | 49% | 2769 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,035 psi | 71% | 3133 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 88% | 45,136 psi | 69% | 3146 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,469 psi | 41% | 1850 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,369 psi | 73% | 3107 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 49,545 psi | 76% | 3153 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,758 psi | 67% | 3018 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,064 psi | 71% | 3041 fps | 95.8% |
| IMR 4350 | <<locked>> | 90% | 45,571 psi | 70% | 3068 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,772 psi | 67% | 3015 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 35,694 psi | 55% | 2884 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 45,643 psi | 70% | 3110 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 51,126 psi | 79% | 3159 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,602 psi | 75% | 3123 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,544 psi | 75% | 3081 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 43,671 psi | 67% | 3022 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 40,625 psi | 63% | 2949 fps | 95.7% |
| Lovex S070 | <<locked>> | 88% | 44,251 psi | 68% | 3048 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 47,848 psi | 74% | 3094 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 48,269 psi | 74% | 3100 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,859 psi | 67% | 3061 fps | 98.9% |
| Norma 204 | <<locked>> | 94% | 52,417 psi | 81% | 3245 fps | 95.4% |
| Norma MRP | <<locked>> | 98% | 46,746 psi | 72% | 3232 fps | 95.9% |
| Norma URP | <<locked>> | 84% | 36,999 psi | 57% | 2933 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 44,106 psi | 68% | 3081 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 41,524 psi | 64% | 3048 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 51,169 psi | 79% | 3166 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,053 psi | 79% | 3189 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,934 psi | 41% | 1896 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,337 psi | 65% | 2989 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,616 psi | 73% | 3202 fps | 99% |
| ReloadSwiss RS 60 | 55.5 gr | 80% | 38,522 psi | 59% | 3041 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,898 psi | 57% | 2953 fps | 95.5% |
| ReloadSwiss RS 70 | 60.6 gr | 86% | 39,204 psi | 60% | 3031 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 51,692 psi | 80% | 3140 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,324 psi | 70% | 3038 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 38,740 psi | 60% | 2936 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 98% | 49,211 psi | 76% | 3205 fps | 95% |
| Rottweil R 907 | <<locked>> | 88% | 47,805 psi | 74% | 3100 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 40,625 psi | 63% | 2949 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,602 psi | 75% | 3123 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,671 psi | 67% | 3022 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 44,251 psi | 68% | 3048 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,074 psi | 62% | 2995 fps | 98% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,821 psi | 77% | 3143 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,485 psi | 73% | 3114 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,849 psi | 75% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,901 psi | 63% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,931 psi | 66% | 2953 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 48,689 psi | 75% | 3038 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,487 psi | 76% | 3136 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 39,581 psi | 61% | 2946 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 28,848 psi | 44% | 2743 fps | 96% |
| Somchem S385 | <<locked>> | 96% | 46,775 psi | 72% | 3120 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 54,940 psi | 85% | 3104 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 49,342 psi | 76% | 3028 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,208 psi | 70% | 3015 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,774 psi | 70% | 3025 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,623 psi | 58% | 2871 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 36,071 psi | 55% | 2874 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 51,445 psi | 79% | 3159 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,353 psi | 68% | 3012 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 38,218 psi | 59% | 2940 fps | 96% |
| Vihtavuori N555 | <<locked>> | 90% | 35,172 psi | 54% | 2927 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,330 psi | 51% | 2782 fps | 96.9% |
| Winchester 748 | <<locked>> | 80% | 51,793 psi | 80% | 3209 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 45,658 psi | 70% | 3136 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,255 psi | 47% | 2861 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,398 psi | 73% | 3120 fps | 99.7% |
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 117 powders for 6.8 Western loaded with the .277 | 110gr | Barnes TSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,409 fps; across all powders the maximum-charge window runs from 2,070 fps to 3,409 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 110.0 gr projectile in 0.277" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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-17, ReloadSwiss RS 60 rank at the top here: for 6.8 Western with the .277 | 110gr | Barnes TSX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Alliant Reloder-22 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.