Load Specifications
Load data in caliber .277 Fury Commercial with .277 | 150gr | Speer Deep Curl Soft Point bullet and 97 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 Power Pro 2000-MR and ReloadSwiss RS 52.
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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 54,273 psi | 86% | 2444 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,057 psi | 89% | 2507 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,724 psi | 88% | 2503 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,360 psi | 86% | 2520 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 55,347 psi | 88% | 2539 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,894 psi | 81% | 2549 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 82% | 56,652 psi | 90% | 2431 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 57,072 psi | 90% | 2454 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,637 psi | 90% | 2569 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 94% | 54,056 psi | 86% | 2516 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,622 psi | 88% | 2526 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 56,115 psi | 89% | 2510 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,143 psi | 86% | 2575 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,217 psi | 89% | 2674 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,592 psi | 85% | 2539 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,896 psi | 85% | 2444 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,317 psi | 86% | 2556 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,748 psi | 79% | 2552 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,085 psi | 86% | 2644 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,709 psi | 88% | 2431 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,434 psi | 89% | 2585 fps | 99.1% |
| Bofors RP3 | <<locked>> | 94% | 54,012 psi | 86% | 2552 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,273 psi | 86% | 2470 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,969 psi | 87% | 2556 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,942 psi | 90% | 2644 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 84% | 56,550 psi | 90% | 2526 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,070 psi | 86% | 2507 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,230 psi | 88% | 2559 fps | 98.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,128 psi | 86% | 2595 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 88% | 53,606 psi | 85% | 2530 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,803 psi | 73% | 2444 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,275 psi | 89% | 2612 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,172 psi | 56% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,737 psi | 87% | 2533 fps | 99.7% |
| IMR 3031 | <<locked>> | 90% | 56,840 psi | 90% | 2566 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,029 psi | 90% | 2549 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,824 psi | 85% | 2480 fps | 96.1% |
| IMR 4198 | <<locked>> | 82% | 54,259 psi | 86% | 2411 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,768 psi | 90% | 2552 fps | 96.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,269 psi | 77% | 2493 fps | 97.8% |
| IMR 4895 | <<locked>> | 92% | 55,680 psi | 88% | 2585 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 55,622 psi | 88% | 2526 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 55,898 psi | 89% | 2516 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,869 psi | 89% | 2549 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,289 psi | 89% | 2503 fps | 99.6% |
| Lovex S062 | <<locked>> | 94% | 56,608 psi | 90% | 2549 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,622 psi | 88% | 2543 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,069 psi | 84% | 2523 fps | 96.2% |
| Norma 201 | <<locked>> | 90% | 55,100 psi | 87% | 2520 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 55,535 psi | 88% | 2523 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,476 psi | 85% | 2543 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 50,589 psi | 80% | 2543 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 92% | 54,041 psi | 86% | 2572 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,487 psi | 78% | 2530 fps | 96.1% |
| Ramshot TAC | <<locked>> | 88% | 55,956 psi | 89% | 2539 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,579 psi | 88% | 2559 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,782 psi | 90% | 2530 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,650 psi | 57% | 1565 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,259 psi | 88% | 2510 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,999 psi | 89% | 2549 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,505 psi | 86% | 2615 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,896 psi | 85% | 2648 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,328 psi | 80% | 2566 fps | 97.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,126 psi | 81% | 2589 fps | 97.4% |
| Rottweil R 901 | <<locked>> | 88% | 56,521 psi | 90% | 2510 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,622 psi | 88% | 2516 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 53,882 psi | 85% | 2546 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,622 psi | 88% | 2543 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,869 psi | 89% | 2549 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,608 psi | 90% | 2549 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,069 psi | 84% | 2523 fps | 96.2% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,824 psi | 87% | 2484 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,405 psi | 88% | 2595 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,940 psi | 87% | 2467 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,172 psi | 86% | 2516 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,853 psi | 87% | 2539 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,882 psi | 85% | 2431 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,985 psi | 90% | 2467 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 56,188 psi | 89% | 2500 fps | 96.4% |
| Somchem S321 | <<locked>> | 84% | 53,258 psi | 84% | 2510 fps | 99.9% |
| Somchem S335 | <<locked>> | 90% | 56,144 psi | 89% | 2467 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,012 psi | 86% | 2516 fps | 99.4% |
| Somchem S355 | <<locked>> | 96% | 54,172 psi | 86% | 2539 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,020 psi | 71% | 2497 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 86% | 57,029 psi | 90% | 2441 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,998 psi | 86% | 2421 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,129 psi | 87% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,246 psi | 89% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,796 psi | 88% | 2526 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,982 psi | 84% | 2543 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 88% | 56,202 psi | 89% | 2530 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,491 psi | 86% | 2503 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,924 psi | 82% | 2543 fps | 98.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,650 psi | 85% | 2530 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 55,999 psi | 89% | 2572 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,534 psi | 86% | 2602 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,476 psi | 86% | 2546 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 45,281 psi | 72% | 2320 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,023 psi | 78% | 2415 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,666 psi | 60% | 2241 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,338 psi | 70% | 2375 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 35,607 psi | 56% | 2228 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 38,595 psi | 61% | 2339 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 53,403 psi | 85% | 2392 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,824 psi | 85% | 2415 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,350 psi | 66% | 2326 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 37,666 psi | 60% | 2241 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,352 psi | 69% | 2339 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 43,062 psi | 68% | 2339 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,502 psi | 80% | 2520 fps | 99.5% |
| Alliant Power Pro 2000-MR | 37 gr | 82% | 39,827 psi | 63% | 2385 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,664 psi | 55% | 2208 fps | 96.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,763 psi | 80% | 2402 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,144 psi | 59% | 2260 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,986 psi | 62% | 2352 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 84% | 34,069 psi | 54% | 2267 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,330 psi | 83% | 2388 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,350 psi | 64% | 2323 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 34,011 psi | 54% | 2208 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,310 psi | 72% | 2336 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,727 psi | 66% | 2352 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,021 psi | 73% | 2477 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 49,661 psi | 79% | 2434 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,604 psi | 80% | 2457 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 39,900 psi | 63% | 2310 fps | 95% |
| Hodgdon H414 | <<locked>> | 98% | 50,560 psi | 80% | 2539 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 41,669 psi | 66% | 2336 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 33,489 psi | 53% | 2205 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,463 psi | 59% | 2303 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,034 psi | 41% | 1358 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,074 psi | 64% | 2293 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 41,133 psi | 65% | 2343 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,898 psi | 58% | 2218 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 50,778 psi | 80% | 2434 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,024 psi | 81% | 2369 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 50,212 psi | 80% | 2454 fps | 95.1% |
| IMR 4831 | <<locked>> | 94% | 39,827 psi | 63% | 2349 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 38,029 psi | 60% | 2287 fps | 96.6% |
| IMR 8208 XBR | <<locked>> | 80% | 43,352 psi | 69% | 2339 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 48,921 psi | 78% | 2421 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 40,263 psi | 64% | 2313 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 41,814 psi | 66% | 2277 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 36,796 psi | 58% | 2228 fps | 97.6% |
| Lovex S065 | <<locked>> | 92% | 43,671 psi | 69% | 2356 fps | 95.1% |
| Lovex S070 | <<locked>> | 98% | 49,676 psi | 79% | 2470 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 40,654 psi | 64% | 2287 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 40,857 psi | 65% | 2300 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 36,564 psi | 58% | 2251 fps | 96.1% |
| Norma URP | <<locked>> | 92% | 39,030 psi | 62% | 2343 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 35,882 psi | 57% | 2257 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 98% | 46,340 psi | 73% | 2480 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 43,323 psi | 69% | 2339 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,757 psi | 68% | 2359 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,891 psi | 74% | 2382 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,556 psi | 42% | 1398 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,733 psi | 77% | 2418 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 49,095 psi | 78% | 2444 fps | 95.7% |
| ReloadSwiss RS 52 | 35 gr | 80% | 38,537 psi | 61% | 2346 fps | 96% |
| ReloadSwiss RS 60 | 35.6 gr | 80% | 31,792 psi | 50% | 2221 fps | 97% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,234 psi | 65% | 2411 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,701 psi | 71% | 2477 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 44,425 psi | 70% | 2333 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 38,638 psi | 61% | 2244 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 32,126 psi | 51% | 2159 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 43,671 psi | 69% | 2356 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,263 psi | 64% | 2313 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 36,796 psi | 58% | 2228 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 98% | 49,676 psi | 79% | 2470 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,314 psi | 81% | 2434 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 35,215 psi | 56% | 2247 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,677 psi | 82% | 2425 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,423 psi | 66% | 2313 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,798 psi | 63% | 2297 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,235 psi | 67% | 2257 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,896 psi | 55% | 2136 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 49,284 psi | 78% | 2402 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 46,731 psi | 74% | 2411 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 41,713 psi | 66% | 2260 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,089 psi | 65% | 2313 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 33,054 psi | 52% | 2165 fps | 95.4% |
| Somchem S365 | <<locked>> | 88% | 30,632 psi | 49% | 2192 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 47,732 psi | 76% | 2323 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,424 psi | 67% | 2257 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,913 psi | 60% | 2241 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,667 psi | 61% | 2244 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 31,401 psi | 50% | 2113 fps | 96.3% |
| Vihtavuori N160 | <<locked>> | 92% | 40,872 psi | 65% | 2346 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 43,453 psi | 69% | 2336 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 37,188 psi | 59% | 2231 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 40,248 psi | 64% | 2349 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,069 psi | 54% | 2185 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 42,656 psi | 68% | 2372 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 50,937 psi | 81% | 2546 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,262 psi | 62% | 2303 fps | 97.5% |
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 97 powders for .277 Fury Commercial loaded with the .277 | 150gr | Speer Deep Curl Soft Point. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,674 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,674 fps. Accurate 4350 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon H414 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 Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .277 Fury Commercial with the .277 | 150gr | Speer Deep Curl 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.