Load Specifications
Load data in caliber .277 Fury Commercial with .277 | 150gr | Sierra SBT GameKing bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 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>> | 88% | 56,681 psi | 90% | 2470 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,216 psi | 88% | 2493 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,766 psi | 87% | 2487 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 56,971 psi | 90% | 2549 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 54,447 psi | 86% | 2526 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,734 psi | 79% | 2526 fps | 97.9% |
| Accurate LT-30 | <<locked>> | 82% | 56,144 psi | 89% | 2421 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,565 psi | 90% | 2444 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,898 psi | 89% | 2556 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 96% | 56,666 psi | 90% | 2549 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 82% | 56,927 psi | 90% | 2526 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,839 psi | 87% | 2510 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 55,042 psi | 87% | 2493 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,913 psi | 90% | 2608 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,100 psi | 87% | 2651 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,086 psi | 89% | 2569 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,681 psi | 90% | 2474 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 56,826 psi | 90% | 2585 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,791 psi | 77% | 2530 fps | 98% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 56,898 psi | 90% | 2677 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,013 psi | 87% | 2418 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,376 psi | 88% | 2566 fps | 98.9% |
| Bofors RP3 | <<locked>> | 96% | 56,710 psi | 90% | 2582 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,476 psi | 85% | 2454 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,824 psi | 85% | 2536 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,666 psi | 88% | 2621 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 84% | 55,608 psi | 88% | 2510 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 56,956 psi | 90% | 2539 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,549 psi | 86% | 2546 fps | 98.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,142 psi | 84% | 2575 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 90% | 56,391 psi | 89% | 2562 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,208 psi | 72% | 2431 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,114 psi | 87% | 2589 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,186 psi | 56% | 1522 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,012 psi | 86% | 2516 fps | 99.6% |
| IMR 3031 | <<locked>> | 90% | 55,854 psi | 89% | 2552 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,246 psi | 89% | 2536 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,811 psi | 90% | 2516 fps | 96.6% |
| IMR 4198 | <<locked>> | 84% | 56,565 psi | 90% | 2434 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,767 psi | 88% | 2530 fps | 96.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,630 psi | 75% | 2480 fps | 97.6% |
| IMR 4895 | <<locked>> | 92% | 54,911 psi | 87% | 2569 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 88% | 54,839 psi | 87% | 2510 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 55,129 psi | 87% | 2503 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,085 psi | 87% | 2533 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,550 psi | 88% | 2487 fps | 99.5% |
| Lovex S062 | <<locked>> | 94% | 55,854 psi | 89% | 2536 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,592 psi | 87% | 2523 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,127 psi | 83% | 2503 fps | 95.8% |
| Norma 201 | <<locked>> | 90% | 54,302 psi | 86% | 2503 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 54,723 psi | 87% | 2507 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,970 psi | 89% | 2575 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 49,574 psi | 79% | 2523 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 94% | 56,695 psi | 90% | 2602 fps | 99.6% |
| Ramshot TAC | <<locked>> | 88% | 55,376 psi | 88% | 2526 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,447 psi | 86% | 2539 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,072 psi | 89% | 2513 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,346 psi | 56% | 1555 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,433 psi | 86% | 2497 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,940 psi | 87% | 2526 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 53,621 psi | 85% | 2598 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 56,710 psi | 90% | 2680 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,313 psi | 78% | 2546 fps | 97.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,951 psi | 79% | 2562 fps | 97% |
| Rottweil R 901 | <<locked>> | 88% | 55,637 psi | 88% | 2493 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,839 psi | 87% | 2500 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 56,130 psi | 89% | 2569 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,592 psi | 87% | 2523 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,085 psi | 87% | 2533 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,854 psi | 89% | 2536 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,127 psi | 83% | 2503 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,027 psi | 86% | 2467 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,766 psi | 87% | 2582 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,273 psi | 86% | 2454 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,505 psi | 85% | 2503 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,172 psi | 86% | 2526 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,420 psi | 89% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,246 psi | 89% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,201 psi | 87% | 2480 fps | 96.1% |
| Somchem S321 | <<locked>> | 86% | 56,144 psi | 89% | 2543 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,376 psi | 88% | 2454 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,550 psi | 90% | 2546 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 56,811 psi | 90% | 2569 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,077 psi | 70% | 2474 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 86% | 56,101 psi | 89% | 2425 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,434 psi | 89% | 2444 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,201 psi | 86% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,448 psi | 88% | 2493 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,708 psi | 87% | 2510 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,953 psi | 82% | 2523 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 88% | 55,419 psi | 88% | 2510 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 57,058 psi | 90% | 2533 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,908 psi | 81% | 2523 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,910 psi | 84% | 2513 fps | 99.6% |
| Winchester 748 | <<locked>> | 88% | 54,766 psi | 87% | 2552 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,548 psi | 85% | 2582 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,751 psi | 85% | 2533 fps | 99.6% |
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% | 44,324 psi | 70% | 2303 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,501 psi | 77% | 2402 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,101 psi | 59% | 2228 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,497 psi | 69% | 2359 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 35,070 psi | 56% | 2211 fps | 99.2% |
| Accurate 4350 | <<locked>> | 94% | 40,451 psi | 64% | 2372 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 52,489 psi | 83% | 2375 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,881 psi | 84% | 2395 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,872 psi | 65% | 2310 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 36,941 psi | 59% | 2221 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 53,505 psi | 85% | 2484 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,873 psi | 68% | 2326 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 80% | 42,409 psi | 67% | 2326 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,879 psi | 79% | 2507 fps | 99.3% |
| Alliant Power Pro 2000-MR | 36.4 gr | 82% | 39,204 psi | 62% | 2369 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,924 psi | 54% | 2192 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,125 psi | 79% | 2392 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,680 psi | 58% | 2247 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,435 psi | 61% | 2333 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,592 psi | 56% | 2300 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,634 psi | 82% | 2372 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,639 psi | 63% | 2306 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 33,243 psi | 53% | 2188 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,889 psi | 71% | 2323 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,263 psi | 65% | 2339 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,194 psi | 72% | 2461 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 80% | 48,718 psi | 77% | 2418 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,763 psi | 79% | 2441 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 42,003 psi | 67% | 2346 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 98% | 50,024 psi | 79% | 2526 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 41,176 psi | 65% | 2323 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,998 psi | 55% | 2238 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,043 psi | 59% | 2290 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,918 psi | 41% | 1352 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,610 psi | 63% | 2280 fps | 97.4% |
| IMR 3031 | <<locked>> | 80% | 40,524 psi | 64% | 2329 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,463 psi | 58% | 2205 fps | 95.4% |
| IMR 4166 Enduron | <<locked>> | 88% | 50,125 psi | 79% | 2418 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 50,357 psi | 80% | 2356 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,576 psi | 83% | 2484 fps | 95.6% |
| IMR 4831 | <<locked>> | 94% | 39,146 psi | 62% | 2333 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,550 psi | 60% | 2274 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 80% | 42,873 psi | 68% | 2326 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 48,080 psi | 76% | 2405 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 39,407 psi | 62% | 2297 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 41,336 psi | 66% | 2264 fps | 97.4% |
| Lovex S062 | <<locked>> | 80% | 36,303 psi | 58% | 2211 fps | 97.4% |
| Lovex S065 | <<locked>> | 94% | 45,658 psi | 72% | 2382 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 48,704 psi | 77% | 2451 fps | 95% |
| Norma 201 | <<locked>> | 80% | 40,147 psi | 64% | 2274 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 40,001 psi | 63% | 2283 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 36,071 psi | 57% | 2238 fps | 95.8% |
| Norma URP | <<locked>> | 94% | 40,843 psi | 65% | 2375 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 35,505 psi | 56% | 2244 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 42,714 psi | 68% | 2323 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,018 psi | 67% | 2343 fps | 97.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,151 psi | 73% | 2365 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,455 psi | 42% | 1388 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,877 psi | 76% | 2402 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 48,472 psi | 77% | 2431 fps | 95.4% |
| ReloadSwiss RS 52 | 34.5 gr | 80% | 38,000 psi | 60% | 2333 fps | 95.7% |
| ReloadSwiss RS 60 | 35 gr | 80% | 31,227 psi | 49% | 2201 fps | 96.6% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,292 psi | 64% | 2388 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 43,932 psi | 70% | 2454 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 43,859 psi | 70% | 2320 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 38,116 psi | 60% | 2231 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 33,460 psi | 53% | 2185 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 45,658 psi | 72% | 2382 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,407 psi | 62% | 2297 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 36,303 psi | 58% | 2211 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 98% | 48,704 psi | 77% | 2451 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,879 psi | 81% | 2425 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,563 psi | 55% | 2231 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,010 psi | 81% | 2411 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,698 psi | 65% | 2293 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,363 psi | 62% | 2283 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,698 psi | 66% | 2244 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,418 psi | 55% | 2123 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,793 psi | 82% | 2434 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 45,963 psi | 73% | 2395 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 41,249 psi | 65% | 2247 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,364 psi | 64% | 2297 fps | 97% |
| Somchem S355 | <<locked>> | 80% | 32,590 psi | 52% | 2152 fps | 95.1% |
| Somchem S365 | <<locked>> | 88% | 30,081 psi | 48% | 2172 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 47,166 psi | 75% | 2310 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,901 psi | 66% | 2244 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,318 psi | 59% | 2224 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,927 psi | 60% | 2228 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 30,748 psi | 49% | 2096 fps | 96% |
| Vihtavuori N160 | <<locked>> | 92% | 40,234 psi | 64% | 2329 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 42,656 psi | 68% | 2320 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 36,477 psi | 58% | 2215 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 94% | 42,105 psi | 67% | 2379 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,359 psi | 53% | 2165 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 41,858 psi | 66% | 2356 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 50,024 psi | 79% | 2526 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,537 psi | 61% | 2283 fps | 97.2% |
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 | Sierra SBT GameKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,680 fps; across all powders the maximum-charge window runs from 1,522 fps to 2,680 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 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 Power Pro 2000-MR, ReloadSwiss RS 60, ReloadSwiss RS 52 rank at the top here: for .277 Fury Commercial with the .277 | 150gr | Sierra SBT GameKing 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.